Oregon Maintenance Manual

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1. Advanced Cutting Technology

Maintenance & Safety Manual www.oregonchain.co.uk

2. Introduction

Introduction
2.

Your chainsaw is only as good as your chain, guide bar, and sprocket.

They function as a team while doing the actual work of cutting wood and, therefore, must be maintained as a team.

A properly maintained chain, bar, and sprocket will provide excellent cutting performance. An improperly maintained chain will cause damage to the bar and sprocket, will cut poorly, and will create potential safety hazards.

This manual addresses the maintenance of only OREGON

® manufactured chains, bars, and sprockets. For information on maintenance and operation of your saw, refer to your saw’s operator’s manual or contact your local chainsaw dealer.

3. Introduction

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CHAINSAW SAFETY
IMPORTANT SAFETY MESSAGE
SAFETY SYMBOL

This safety symbol is used to highlight safety messages. When you see this symbol, read and follow the safety message to avoid severe personal injury.

WARNING

All cutting chain can kick back, which can lead to dangerous loss of control of the chainsaw and result in serious injury to the saw operator or by standers. Follow all instructions in your chainsaw operator’s manual and in this booklet for proper use and maintenance of your saw’s cutting chain, guide bar, and sprocket.

GUARD AGAINST CHAINSAW KICKBACK • Know your personal level of chainsaw experience.

Know your cutting chain.

If you do not have experience and specialized training for dealing with chainsaw kickback, then OREGON

® urges you to use only low-kickback saw chains.

WHAT IS KICKBACK?

Kickback is the violent backward and/or upward motion of the chainsaw guide bar occurring when the chain near the nose or tip of the guide bar contacts any object, such as another log or branch, or when the wood closes in and pinches the saw chain in the cut.

TO HELP AVOID INJURY
Kickback Awareness

Be alert at all times to guard against a possible kickback reaction. Always be aware of the position of your bar’s nose.

Different models of cutting chain are available for most cutting tasks. Use the chain, suitable for your type of cutting, with the lowest kickback potential.

Narrow-nose bars such as OREGON ® Double Guard™ bars are recommended for maximum kickback safety.

Potential Kickback Situation

4. Introduction

Introduction
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CLOTHING AND PROTECTIVE EQUIPMENT

NOTE: Dress properly - do not wear clothing that is too tight or too loose.

Wear protective gloves to prevent slippage and to protect hands.

Wear chainsaw protective boots or safety boots and gaiters to protect feet.

Wear hard hat to protect head.

Wear ear protection to protect ears.

Wear safety goggles or face shield to protect eyes.

Wear protective trousers or leggings to protect legs

MAKE PROPER WORK PRACTICES A HABIT
Use only a right-hand grip to hold your saw (right hand on the trigger, left hand on the front handle).
Keep your left arm straight for better control.
Hold saw firmly with both hands. Keep thumb firmly locked around front handle.
Stand to the side of the chainsaw, never behind it.
Run engine at full throttle.
Use low-kickback saw chain and a reduced-kickback guide bar.
Keep the chainsaw, cutting chain, guide bar and sprocket properly maintained.
Stand with feet well braced and your body balanced.
Cut only wood with your chainsaw. Do not cut any other material.
CAUTION

L Keep yourself clear of the work. Before cutting :

Calculate how the object being cut will fall.
Determine if the saw may be thrown unexpectedly by the movement of the cut material.
Position yourself to avoid injury.

L Never cut above shoulder level.

L Never cut while in a tree, or while on a ladder.

L Keep others away from the cutting area.

Do not allow others to hold wood during cutting.

CHAINSAW SAFETY

5. 1.

Contents
Contents
INTRODUCTION

Introduction .............................

Chainsaw safety ......................

CHAIN

Chain Terms ..........................2 Chain Pitch ........................... 2

Chain Gauge ........................ 2 Parts of a Cutter .....................2

Cutter Sequence .................... 2 Parts of a Saw Chain ............. 3

Maintenance Terms ................3 Chain maintenance tools ........ 4

Chain identification chart .....5-7

Chain drive-link number identification ......................... 8

Chain letter identification ........ 9 Four basic rules .............. 10-11

How to maintain the chain .....12 How to tension chain ...... 13-15

How to lubricate chain ..........15 How to set depth gauges ..........................

16-17
How to sharpen cutters .... 18-19
How to install chain parts 20-21

How to break out rivets ... 22-23

How to run-in a new chain .....24 End-user symbols ...................25

Filing specifications ........26-47
Chain troubleshooting ..... 48-54
GUIDE BARS

Guide bar terms ...................55 Guide bar maintenance tools ....................................55

Guide bar maintenance ...56-57
How to replace
Power Match
® noses .......58-59
Pro-Lite ® noses sprockets ........................60-61
Guide bar troubleshooting ...............62-64
DRIVE SPROCKETS

Sprocket terms, tools, and installation .....................

65 Sprocket maintenance ..... 66-67

Sprocket troubleshooting ...............

68-69
USEFUL INFORMATION
Useful information ...........70-71
CONTENTS

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CHAIN GAUGE

Chain gauge is the drive link’s thickness where it fits into the guide-bar groove. The industry standard for chain gauges are:

.043" (1.1mm), .050" (1.3mm), .058" (1.5mm), .063" (1.6mm)

OREGON

® chain gauges of .080" (2mm) and .122" (3.1mm) are used for Harvester applications.

THE PARTS OF A CUTTER
CHAIN CUTTER-SEQUENCE TERMS Standard Semi-Skip Skip
Cutting cornerTop plate
Rivet
Hole
Heel
Toe
Depth
Gauge
Gullet
Side Plate
OREGON
® CHAIN TERMS CHAIN PITCH

Chain Pitch is the distance between any three consecutive rivets, divided by two. OREGON

® chain pitches are:

1/4", .325", 3/8", .404" and 3/4".

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OREGON® CHAIN TERMS THE PARTS OF A SAW CHAIN

NOTE: Highlighted parts below indicate kickback-reducing “bumper link" features: bumper tie strap, bumper drive link, and ramped depth gauge.

Preset Tie Strap
Drive Link
Bumper Tie Strap

Right-hand Cutter Ramped Depth Gauge Tie Strap Ramped

Depth
Gauge

Left-hand Cutter Preset Bumper Tie Strap Tie Strap

Right-hand Cutter Depth Gauge Left-hand Cutter Depth Gauge

CUTTER MAINTENANCE TERMS

Depth-gauge Setting Top-plate Filing Angle Top-plate Cutting Angle

File-guide Angle Bumper Drive Link

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OREGON

® CHAIN-MAINTENANCE TOOLS FILING TOOLS ASSEMBLED FILE GUIDE SHARPENING KIT

ROUND FILE FLAT FILE DEPTH-GAUGE TOOL BAR-MOUNTED

FILING GUIDE

FILE HANDLE FILING VISE GRINDERS SURE SHARP

® 12-VOLT GRINDER BENCH-MODEL CHAIN GRINDER MINI GRINDER

CHAIN-REPAIR TOOLS CHAIN BREAKER RIVET SPINNER POCKET-CHAIN

BREAKER
GRINDING WHEELS

9. Saw Chains

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OREGON

® FILING OREGON ® CHAIN GAUGE CUTTER TYPE CUTTER KICKBACK

CHAIN SPEC’S CHAIN IN. MM END SIDE SEQUENCE REDUCING

PART TYPE VIEW VIEW FEATURES (IF ANY)* 050"MICRO-

LITE™ 050" 058" 063" 1.3 1.5 1.6 MICRO CHISEL ® MICRO CHISEL®

STANDARD

050" 058" 063" 1.3 1.5 1.6 SUPER 20 CHISEL STANDARD

MICRO CHISEL

® STANDARD 058" 063" 1.5 1.6 MULTICUT CHISEL STANDARD

050"RIPPING CHAIN 1.3 MICRO CHISEL® STANDARD 20BPX

21BPX 22BPX 95VPX 1.3 20LPX 21LPX 22LPX M21LPX M22LPX

95R .325" PITCH CHAINS Page 30 Page 27 Page 28 Page

31 Page 43 1/4" PITCH CHAIN KICKBACK REDUCING FEATURES

BUMPER TIE STRAP 050"25AP 1.3MICRO CHISEL® MICRO CHISEL

® STANDARDPage 26 CHAIN IDENTIFICATION RAMPED DEPTH GAUGE

LOW-PROFILE RAMPED DEPTH GAUGE BUMPER DRIVE LINK

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CHAIN IDENTIFICATION
Page

39 3/8" PITCH CHAINS OREGON ® FILING OREGON ® CHAIN GAUGE CUTTER TYPE CUTTER KICKBACK

CHAIN SPEC’S CHAIN IN. MM END SIDE SEQUENCE REDUCING

PART TYPE VIEW VIEW FEATURES (IF ANY)* 043" MICRO-

LITE™ Low vibration 050" 058" 063" 1.3 1.5 1.6 SUPER

GUARD™ CHISEL (LG) STANDARD 050" 058" 063" 1.3 1.5

6 SUPER 70 Low vibration CHISEL (LP) STANDARD 050"

058" 063" 1.3 1.5 1.6 RIPPING CHAIN SEMI-CHISEL STANDARD

CHAMFER-CHISEL (SG) STANDARD 058" 063" 1.5 1.6 MULTICUT

CHISEL STANDARD

050" Low vibration Low profile 1.3 CHAMFER-CHISEL STANDARD

72LGX 73LGX 75LGX 90SG 1.1 72LPX 73LPX 75LPX 72RD

73RD 75RD M73LPX M75LPX 91VX Page 38 Page 34 Page

35 Page 36 Page 32 050" Low vibration XTRA GUARD™

3 CHAMFER-CHISEL STANDARD 91VG Page 40 050"POWER
SHARP

® 1.3 SPECIALIZED STANDARD 91LX - 050"91R 1.3RIPPING

CHAIN

CHAMFER-CHISEL STANDARDPage 37 050" 050" M91VX 91VXL

3 1.3 MULTICUT SEMI- CHISEL CHAMFER-CHISEL STANDARD
STANDARD
Page

39 Page 29 050" 058" 063" 1.3 1.5 1.6 S-70 STANDARD

72DX/DPX 73DX/DPX 75DX/DPX SEMI-CHISEL SEMI-CHISEL
Page
33

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11H Page 46 CHAIN IDENTIFICATION OREGON ® FILING OREGON

® CHAIN GAUGE CUTTER TYPE CUTTER KICKBACK CHAIN SPEC’S CHAIN IN. MM END SIDE SEQUENCE REDUCING

PART TYPE VIEW VIEW FEATURES (IF ANY)* 122" 3.1SEMI-

CHISEL
STANDARD

058" 063" SUPER GUARD™ 063" 080" 1.6 2.0 HARVESTER

MICRO CHISEL

® STANDARD 058" 063" 1.5 1.6 MICRO- CHISEL® MICRO CHISEL

® STANDARD 063" 1.6MICROBIT ® CHIPPER STANDARD CHISEL STANDARD

063" 1.6RIPPING CHAIN MICRO CHISEL ® (R) STANDARD

16H 18HX 58L 59L 1.5 1.6 SEMI-CHISEL 26 27, 27P 59AC

27R .404" PITCH CHAINS 3/4" PITCH CHAINS Page 45

Page

47 Page 41 Page 44 Page 42 KICKBACK REDUCING FEATURES

BUMPER TIE STRAP P ONLY CP ONLY BUMPER DRIVE LINK

RAMPED DEPTH GAUGE LOW-PROFILE RAMPED DEPTH GAUGE

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CHAIN PITCH GAUGE
NUMBER IN MM

11 3/4" .122" 3.1 16 .404" .063" 1.6 18 .404" .080" 2.0

20 .325" .050" 1.3 21 .325" .058" 1.5 22 .325" .063" 1.6

25 1/4" .050" 1.3 26 .404" .058" 1.5 27 .404" .063" 1.6

58 .404" .058" 1.5 59 .404" .063" 1.6 72 3/8" .050" 1.3

73 3/8" .058" 1.5 75 3/8" .063" 1.6 90 3/8" .043" 1.1

91 3/8" .050" 1.3 95 .325" .050" 1.3 CHAIN DRIVE-LINK NUMBER IDENTIFICATION

Nearly all OREGON® chains are named by a part number made up of a number (see below), followed by one or two letters (see page 9).

OREGON

® Part-number Examples: 18 HX, 72LPX, 91VG The Numbers: 18 HX, 72 LPX, 91 VG

The numbers are stamped on the chain’s drive links and indicate the physical size of the chain (pitch and gauge).

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CHAIN LETTER IDENTIFICATION The letters: 18 HX , 72 LPX , 91 VG

The letters represent cutter type and sequence, safety features, or other physical traits of the chain.

AC Chipper Cutter, Standard Sequence AP Micro Chisel ®

Cutter, Bumper Drive Link, Standard Sequence BC Chipper cutter with standard sequence (11BC only)

BPX Low vibration Micro Chisel ® Cutter, Bumper Drive Link,

Standard Sequence

DX Semi-chisel Cutter, Standard Sequence DPX Semi-chisel Cutter, Bumper

Drive Link, Standard Sequence H Modified for Harvester applications, Micro Chisel

® or Semi-chisel cutters with Standard Sequence L Round-ground chisel cutters with standard sequence (.404"

58L & 59L) LGX Round-ground Chisel Cutter, Ramped Depth

Gauge, Standard Sequence.

LPX Low vibration Round-ground Chisel Cutter, Bumper Drive

Link, Standard Sequence LX Power Sharp ® Chain, Ramped Depth Gauge,

Bumper Drive Link, Standard Sequence (no hand maintenance required)

M Specially built chain with round-ground chisel cutters

(M73, 75LPX, M21,22LPX) and Bumper Drive Link or chamfer-chisel cutter (M91VX) and ramped depth gauge for effective cutting in extremely dirty or abrasive conditions

R Ripping Chain, Chamfer-chisel (91R) or Micro-chisel

(95R,27R) Cutter, Standard Sequence RA Ripping Chain, Micro-chisel

Cutter, Skip Sequence RD Ripping chain with semi- chisel cutters and standard sequence

SG Low vibration chamfer-chisel cutters, ramped depth gauge, bumper tie strap, standard sequence, narrow kerf design.

VG Low-vibration Chamfer-chisel cutter, ramped depth gauge, bumper tie strap, standard sequence

VPX Low-vibration Micro Chisel™ cutter, ramped depth gauge, bumper drive link, narrow-kerf design (95VPX only)

VX Low-vibration Chamfer-chisel cutters, ramped depth gauge, standard sequence

VXL Low-vibration Semi-chisel cutters with long top plate, ramped depth gauge, standard sequence

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THE FOUR BASIC SAW-CHAIN RULES ATTENTION CHAINSAW USERS

OREGON

® urges you to become familiar with the four basic saw-chain rules. Users who know and follow these rules can count on superior performance from their chain, bar, and sprocket, - and reduce safety hazards at the same time.

RULE NUMBER 1 Your chain must be correctly tensioned.

More chain and bar problems are caused by incorrect chain tension than by any other single factor. See pages13 and 14 on how to tension your chain.

RULE NUMBER 2 Your chain must be well lubricated

A constant supply of oil to your saw’s bar, chain and sprocket is vital.

Without it, excessive friction, wear, and damage will occur.

See page 15 for instructions on how to lubricate your chain.

15. Saw Chains

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THE FOUR BASIC SAW-CHAIN RULES RULE NUMBER 3 Your chain’s depth gauges must be set correctly

Depth-gauge setting and depth-gauge shape are critical to performance and safety. See pages 16-17 for instructions on how to set your chain’s depth gauges.

RULE NUMBER 4 Your chain must be sharp

When your chain is sharp, it does the work. When it’s not, you do the work

and your cutting attachments will wear more rapidly. See pages 18 and 19 for instructions on how to sharpen your chain. See pages 26 to 47 to find maintenance specifications for each OREGON

® chain type.

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HOW TO MAINTAIN CHAIN

ATTENTION: DEALERS, CHAINSAW USERS, AND ANYONE WHO

SERVICES SAW CHAIN - IMPORTANT SAFETY INFORMATION.

OREGON

® urges you to become familiar with proper chain-maintenance techniques, and the possible dangers which can result if chain is not properly maintained.

Always turn off your saw’s engine before handling the chain, guide bar or sprocket.

Any one of the following conditions can increase a chain’s potential kickback energy, increase the risk of a chain throwing itself off the bar, or increase the risk of other hazards associated with chainsaw use.

Incorrect sharpening of chain angles.
Dull chain.
Alteration of kickback-reducing chain features.
Excessive chain depth-gauge settings.
Incorrect chain depth-gauge shapes.
Loose chain tension.
Incorrectly installed chain parts.
Loose rivets, or cracks or breaks in any chain component.

When performing maintenance on saw chain, follow all instructions on pages 12 through 54. Doing so can minimize the risk of injury.

WARNING

Failure to follow the instructions below can result in severe injury to the saw operator, bystanders, or the person performing maintenance.

17. Saw Chains

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HOW TO TENSION YOUR CHAIN WITHOUT INTENZ™ NOTE: Always wear protective gloves.

Turn the engine off.

NOTE: Never tension your chain right after cutting. Chain tensioned while hot can cool and contract, causing tension to be much too tight.

Let chain cool first.

Loosen bar-mounting nuts on the side of your saw.

Pull the bar nose up, and keep it up as you adjust tension.

Adjust tension as follows:

If you have a solid-nose bar

Read the warnings on page 12.

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HOW TO TENSION YOUR CHAIN WITHOUT INTENZ™ If you have a sprocket-nose bar

©Tension must be tighter than on a solid-nose bar. Turn your saw’s tension-adjustment screw until the bottoms of the lowest tie straps and cutters come up and solidly contact the bottom of the bar rail.

With either type of bar, hold the nose up and tighten your saw’s rear bar-mounting nut first, then tighten the front nut.

Pull the chain by hand along the top of the bar several times, from the engine to the bar’s tip. Chain should feel snug but still pull freely.

NOTE: If you have a sprocket-nose bar you should now perform the snap test. Grasp the chain along the bottom of the bar, pull down, and let go.

Chain should snap back to its original position, solidly contacting the bottom of the bar.

Check tension often during operation, especially during the first half-hour. If chain loosens: stop, let chain cool, and readjust tension.

19. Saw Chains

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HOW TO TENSION YOUR CHAIN WITH INTENZ™ Turn the engine off.

Loosen the bar mounting nuts on the side of the saw.

Insert a combination tool blade in the Intenz™ slot of the guide bar.

Turn the combination tool to move the guide bar forwards, away from the saw as far as possible.

Tighten the back bar mounting nut, then tighten the front nut

HOW TO LUBRICATE YOUR CHAIN

Keep your saw’s chain-oiling system filled with clean bar-and-chain oil.

Never put used oil, or old motor oil in your saw or on your chain.

Be sure your chain, bar, and sprocket are always receiving oil from the saw during operation.

Fill your oil reservoir each time you fill your gas tank.

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HOW TO SET DEPTH GAUGES

NOTE

On saw depth-gauge setting requires proper chain tension, as shown on pages 13-14,prior to filing.
Pages 26 through 47 show the correct depth-gauge setting and the part number of the correct depth-gauge tool for each of the different
OREGON

® chain types.

Find the page (26-47), which gives the correct filing specifications for your OREGON

® chain type. To do so, use the Chain identification chart on pages 5, 6 and 7.

If unsure of your OREGON

® chain’s type, or part number, ask your OREGON ® saw chain dealer.

Most OREGON

® chains have a number stamped on each depth gauge indicating the correct depth-gauge setting.

EXAMPLE: .025" (0.64mm) .025" (0.64mm) Depth-gauge Setting

Use a depth-gauge tool with the correct built-in setting for your chain and check your depth gauges every 3 or 4 sharpenings.

Place the tool on top of your chain so one depth gauge protrudes through the slot in the tool.

If the depth gauge extends above the slot, file the depth gauge down level with the top of the tool using a flat file.

Never file the depth gauge down enough to exceed the depth-gauge setting specified in this manual for your OREGON

® chain.

Read the warnings on page 12.

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HOW TO SET DEPTH GAUGES

NOTE: Do not file or alter the tops of kickback-reducing bumper tie straps or bumper drive links.

File from the inside of the cutter to the outside

After lowering, always file off the front corner of each depth gauge parallel to its original rounded or ramped shape.

NOTE: On many chains, it may be helpful to tip the depth gauge tool on end and place it in front of the working corner in order to protect the cutting surfaces when re-shaping depth gauges. inside outside

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HOW TO SHARPEN CUTTERS

Read the warnings on page 12.

NOTE

On-saw sharpening requires proper chain tension.
Pages 26 through 47 show the correct maintenance specifications and the correct maintenance-tool part numbers for each of the
OREGON

® chain types.

Find the correct filing specifications for your OREGON

® chain type.

If unsure of your OREGON

® chain’s type, part number or filing specification, ask your OREGON

® saw chain dealer.

Check and adjust depth gauges.
ROUND-FILE CUTTER SHARPENING

Be sure 1/5th, or 20%, of the file’s diameter is always held above the cutter’s top plate. Using the correct file guide is the easiest way to hold the file in this position.

Keep the correct Top-plate Filing Angle line on your file guide parallel with your chain.

File holder
Direction of stroke
=1/5th or 20% above top plate

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HOW TO SHARPEN CUTTERS

Sharpen cutters on one side of the chain first. File from the inside of each cutter to the outside. Then turn your saw around and repeat the process for cutters on the other side of the chain. outside inside

If damage is present on the chrome surface of top plates or side plates, file back until such damage is removed.

Keep all cutter lengths equal.

A A=B B

Re-check depth gauges. If re-setting of the depth gauges is necessary, follow instructions on pages 16 and 17.

NOTE: Do not file or alter the tops of kickback-reducing bumper tie straps or bumper drive links.

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HOW TO INSTALL NEW CHAIN PARTS Read the warnings on page 12.

NOTE

Use only OREGON

® parts to repair OREGON ® chain. And only use parts which are the correct size and type for your chain.

Remove rivets, and parts to be replaced, as shown under “How to

Break Out Rivets," pages 22 to 23. Never reassemble a chain with old preset tie straps - always use new preset tie straps.

If needed, file off bottom of new parts to match existing worn parts.

File new cutters back to match worn cutters. Do not file the tops of kickback-reducing bumper tie straps or bumper drive links.

Place the preset tie strap on a flat outer surface of a chain-breaker anvil. Be sure the rivets are pointing up.

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HOW TO INSTALL NEW CHAIN PARTS Assemble chain to the preset tie strap.

Assemble tie strap with brandmark or Lubrilink™ contour face up, and the notch toward the drive-link tangs. Assemble bum- per tie strap in the correct direction, with the notch toward the drive-link tangs.

Be sure parts are assembled in the correct location, sequence and direction. Check the illustrations on pages 2 and 3. If unsure, ask your

OREGON

® dealer.

To form rivet heads, use an OREGON® rivet spinner. Follow the instruc- tions packaged with the rivet spinner.

CAUTION

Rivet heads must be snug and secure while still allowing all joined parts to move freely. Rapid wear leading to possible chain breakage and personal injury can be caused by rivet heads that are either too tight, or too loose.

NOTE: New rivet heads may be smaller and shaped differently than factory-spun heads.

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HOW TO BREAK OUT RIVETS

NOTE: Always wear approved safety accessories for hands and face when breaking out rivets.

Select proper anvil slot number on chain- breaker anvil which matches the drive-link number on the chain to be broken (see

Chain Drive-link-number Chart on the next page).

Insert chain portion for breaking into the proper slot of the chain anvil and push chain forward until bottom tie strap is flush with the far side of slot. (Drive link is then supported on both sides of slot.)

Position rivet head directly under punch.

Pull handle down if using a bench chain breaker, or hammer out rivet if using a handheld punch. Do not use excessive force.

NOTE: Important-when breaking chain at cutter, make sure cutter is in up position.

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HOW TO BREAK OUT RIVETS

CHAIN DRIVE-LINK-NUMBER CHART REMOVING RIVETS FROM BROKEN DRIVE LINKS

When removing rivets from broken drive links, hold the two broken segments together in their original (unbroken) positions as you tighten the chain link in the adjustable anvil.

See steps 1-3 from “How to break out rivets" on the previous page.

ANVIL SLOT

NUMBER 1/4 .325 90/91 3/8 .404 3/4 18H DRIVE-LINK 25 95 90 72 16 11 18

NUMBER 20 91 73 26 21 75 27 22 58 59

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HOW TO RUN-IN A NEW CHAIN

The life of your new chain can be extended by taking these few simple steps before using it.

Soak the chain overnight to allow oil to penetrate all chain components.

Never run any chain on a worn drive sprocket, especially a new chain. Replace drive sprocket systems after every two chains, or sooner.

Run new chain at half throttle for several minutes before doing any cutting in order to allow oil to reach all parts of the bar and chain. Let sprocket, bar, and chain warm up fully.

Stop, check chain tension, let chain cool, and adjust tension often during operation, as shown on pages 13 and 15.

Keep the first several cuts light.

Keep extra oil on the bar and chain during these first cuts, and do not apply heavy pressure.

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CHAINSAW SAFETY
THE FOUR OREGON
® END-USER SYMBOLS

Each of these four symbols represents a large category of saw-chain users. OREGON

® chains are listed under one or more of these symbols, generally indicating the type of user for whom the chain is intended.

PROFESSIONAL CHAINSAW USERS • Big-timber loggers
Pulpwood loggers
Forest firefighters
COMMERCIAL CHAINSAW USERS
Arborists
Orchardists
Utility and construction workers
Tree surgeons
Farmers
Commercial thinners
Commercial firewood cutters
Landscapers
CASUAL CHAINSAW USERS
Homeowners
Occasional firewood cutters
Campers
Hunters

MECHANICAL HARVESTER USERS • For use on mechanical timber- harvesting equipment

Do not use harvester attachments on hand-held saws.

NOTE: Harvester chains are listed in this manual for reference. For more information on other harvester products, see the OREGON

® Harvester catalogue and technical data.

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TOOLS FOR FILING

PART N°. DESCRIPTION 70504 5/32" (4.0mm) Round File

16265 5/32" (4.0mm) Assembled File Guide 27530 .025" (0.64mm) Depth-gauge Tool

12211 Depth-gauge File (flat) 90405 Sharpening kit

OREGON® MICRO CHISEL® FILING Kickback Reducing Features

End View Use

Chain on this page is intended for use with saws up to 2.3 cu. in. displacement (38cc), and bars up to 16 in. length (41 cm).

CHAIN TYPE GAUGE

25AP .050" (1.3mm) TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE MICRO CHISEL® 1/4"

31. 27.27.

27.
Introduction
Introduction
Saw Chains

OREGON® MICRO CHISEL® Toe TOOLS FOR FILING PART N°. DESCRIPTION

70503 3/16" (4.8mm) Round File 18228 3/16" (4.8mm) Assembled File Guide

27530 .025" (0.64mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90407 Sharpening kit FILING Kickback Reducing Features

End View Use

Chain on this page is intended for use with saws up to 3.5 cu. in. displacement (58cc), and bars up to 20 in. length (50 cm).

CHAIN TYPE GAUGE

20BPX .050" (1.3mm) 21BPX .058" (1.5mm) 22BPX .063" (1.6mm)

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE MICRO CHISEL® 325''

32. 28.28.

28.
Introduction
Introduction
Saw Chains
Toe
TOOLS FOR FILING

PART N°. DESCRIPTION 70503 3/16" (4.8mm) Round File

18228 3/16" (4.8mm) Assembled File Guide 27530 .025" (0.64mm) Depth-gauge Tool

12211 Depth-gauge File (flat) 90407 Sharpening kit

FILING
Kickback
Reducing
Features
End View Use

Chain on this page is intended for use with saws up to 3.5 cu. in. displacement (58cc), and bars up to 20 in. length (50 cm).

CHAIN TYPE GAUGE

20LPX .050" (1.3mm) 21LPX .058" (1.5mm) 22LPX .063" (1.6mm)

OREGON

® CHISEL SUPER 20 .325" LOW PROFILE 3/8" TOP-PLATE FILING

ANGLE

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

33. 29.29.

29.
Introduction
Introduction
Saw Chains

OREGON® SEMI CHISEL Toe TOOLS FOR FILING PART N°. DESCRIPTION

70504 5/32" (4.0mm) Round File 16265 5/32" (4.0mm) Assembled File Guide

27530 .025" (0.64mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90405 Sharpening kit FILING Kickback Reducing Features

End View Use

Chain on this page is intended for use with saws up to 3.8 cu. in. displacement (62cc), and bars up to 20 in. length (50 cm).

CHAIN TYPE GAUGE

91VXL .050" (1.3mm) TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

LOW PROFILE 3/8" FILE-GUIDE ANGLE

34. 30.30.

30.
Introduction
Introduction
Saw Chains

MICRO-LITETM .325" MULTICUT .325" Toe TOOLS FOR FILING

PART N°. DESCRIPTION 70503 3/16" (4.8mm) Round File

18228 3/16" (4.8mm) Assembled File Guide 27530 .025" (0.64mm) Depth-gauge Tool

12211 Depth-gauge File (flat) 90407 Sharpening kit

OREGON® MICRO CHISEL® FILING Kickback Reducing Features

End View Use

Chain on this page is intended for use with saws up to 2.8 cu. in. displacement (45cc), and bars up to 18 in. length (45 cm).

CHAIN TYPE GAUGE

95VPX .050" (1.3mm) TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

35. 31.31.

31.
Introduction
Introduction
Saw Chains

MULTICUT .325" OREGON ® CHISEL Toe TOOLS FOR FILING

PART N°. DESCRIPTION 70503 3/16" (4.8mm) Round File

18228 3/16" (4.8mm) Assembled File Guide 27530 .025" (0.64mm) Depth-gauge Tool

12211 Depth-gauge File (flat) 90407 Sharpening kit

FILING
Kickback
Reducing
Features
End View Use

Chain on this page is intended for use with saws up to 3.5 cu. in. displacement (58cc), and bars up to 20 in. length (50 cm).

CHAIN TYPE GAUGE

M21LPX .058" (1.5mm) M22LPX .063" (1.6mm) TOP-PLATE FILING

ANGLE

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

36. 32.32.

32.
Introduction
Introduction
Saw Chains

S-70 3/8" Toe TOOLS FOR FILING PART N°. DESCRIPTION

70502 7/32" (5.5mm) Round File 13252 7/32" (5.5mm) Assembled File Guide

27530 .025" (0.64mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90404 Sharpening kit OREGON ® CHISEL FILING Kickback

Reducing
Features
End View Use

Up to three times the stay sharp of conventional chain. For use with saws up to 6.0 cu in displacement (98cc) and bars up to 36 in length

(91 cm).

CHAIN TYPE GAUGE

M73LPX .058" (1.5mm) M75LPX .063" (1.6mm) MULTICUT 3/8"

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

37. 33.33.

33.
Introduction
Introduction
Saw Chains

S-70 3/8" OREGON® SEMI CHISEL Toe TOOLS FOR FILING

PART N°. DESCRIPTION 70502 7/32" (5.5mm) Round File

13252 7/32" (5.5mm) Assembled File Guide 27530 .025" (0.64mm) Depth-gauge Tool

12211 Depth-gauge File (flat) 90404 Sharpening kit

FILING
Kickback
Reducing
Features
Only for DPX
End View Use

Chain on this page is intended for use with saws up to 6.0 cu. in. displacement (98cc), and bars up to 36 in. length (91 cm).

CHAIN TYPE GAUGE

72DX, DPX .050" (1.3mm) 73DX, DPX .058" (1.5mm) 75DX, DPX .063" (1.6mm)

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

38. 34.34.

34.
Introduction
Introduction
Saw Chains

OREGON® CHISEL® Toe TOOLS FOR FILING PART N°. DESCRIPTION

70502 7/32" (5.5mm) Round File 13252 7/32" (5.5mm) Assembled File Guide

27530 .025" (0.64mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90404 Sharpening kit FILING Kickback Reducing Features

End View Use

Chain on this page is intended for use with saws up to 6.0 cu. in. displacement (98cc), and bars up to 36 in. length (91 cm).

CHAIN TYPE GAUGE

72LGX .050" (1.3mm) 73LGX .058" (1.5mm) 75LGX .063" (1.6mm)

SUPER GUARD® 3/8" SUPER 70 3/8" TOP-PLATE FILING

ANGLE

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

39. 35.35.

35.
Introduction
Introduction
Saw Chains
OREGON

® CHISEL ® Toe TOOLS FOR FILING PART N°. DESCRIPTION

70502 7/32" (5.5mm) Round File 13252 7/32" (5.5mm) Assembled File Guide

27530 .025" (0.64mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90404 Sharpening kit FILING Kickback Reducing Features

End View Use

Chain on this page is intended for use with saws up to 6.0 cu. in. displacement (98cc), and bars up to 36 in. length (91 cm).

CHAIN TYPE GAUGE

72LPX .050" (1.3mm) 73LPX .058" (1.5mm) 75LPX .063" (1.6mm)

SUPER 70 3/8" TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

40. 36.36.

36.
Introduction
Introduction
Saw Chains

OREGON® SEMI CHISEL Toe TOOLS FOR FILING PART N°. DESCRIPTION

70502 7/32" (5.5mm) Round File 13252 7/32" (5.5mm) Assembled File Guide

27530 .025" (0.64mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90404 Sharpening kit FILING End View Use

Ripping chain feature a special grind for use in ripping cuts only. Do not use these chains for any type of cutting other than ripping.

CHAIN TYPE GAUGE

72RD .050" (1.3mm) 73RD .058" (1.5mm) 75RD .063" (1.6mm)

RIPPING CHAIN 3/8" RIPPING LOW PROFILE 3/8" TOP-PLATE FILING

ANGLE

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

41. 37.37.

37.
Introduction
Introduction
Saw Chains

OREGON® CHAMFER CHISEL Toe TOOLS FOR FILING PART N°. DESCRIPTION

70504 5/32" (4.0mm) Round File 16265 5/32" (4.0mm) Assembled File Guide

27530 .025" (0.64mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90405 Sharpening kit FILING End View Use

Ripping chain feature a special grind for use in ripping cuts only. Do not use these chains for any type of cutting other than ripping.

CHAIN TYPE GAUGE

91R .050" (1.3mm) RIPPING LOW PROFILE 3/8" TOP-PLATE FILING

ANGLE

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

42. 38.38.

38.
Introduction
Introduction
Saw Chains
OREGON

® MICRO-LITE™ Toe TOOLS FOR FILING PART N°. DESCRIPTION

70511 4.5mm Round File 29192 4.5mm Assembled File Guide

27530 .025" (0.65mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90403 Sharpening kit FILING Kickback Reducing Features

End View Use

Chain on this page is intended for use with saws up to 2.4 cu. in. displacement (40cc), bars for electric saws up to 16 in. (41 cm) and gasoline saws up to 14 in. (35cm).

CHAIN TYPE GAUGE

90SG .043" (1.1mm) MICRO-LITETM 90 LOW PROFILE 3/8"

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

43. 39.39.

39.
Introduction
Introduction
Saw Chains
OREGON

® CHAMFER CHISEL Toe TOOLS FOR FILING PART N°. DESCRIPTION

70504 5/32" (4.0mm) Round File 16265 5/32" (4.0mm) Assembled File Guide

27530 .025" (0.64mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90405 Sharpening kit FILING Kickback Reducing Features

End View Use

Chain on this page is intended for use with saws up to 2.5 cu. in. displacement (41cc), and bars up to 16 in. length (41 cm).

CHAIN TYPE GAUGE

91VX .050" (1.3mm) LOW PROFILE 3/8" TOP-PLATE FILING

ANGLE

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

44. 40.40.

40.
Introduction
Introduction
Saw Chains
OREGON

® CHAMFER CHISEL Toe TOOLS FOR FILING PART N°. DESCRIPTION

70504 5/32" (4.0mm) Round File 16265 5/32" (4.0mm) Assembled File Guide

27530 .025" (0.64mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90405 Sharpening kit FILING Kickback Reducing Features

End View Use

Chain on this page is intended for use with saws up to 2.5 cu. in. displacement (41cc), and bars up to 16 in. length (41 cm).

CHAIN TYPE GAUGE

91VG .050" (1.3mm) Reduced kickback chain XTRA GUARD® 3/8" MICRO-CHISEL® .404"

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

45. 41.41.

41.
Introduction
Introduction
Saw Chains
OREGON

® MICRO CHISEL ® Toe TOOLS FOR FILING PART N°. DESCRIPTION

70502 7/32" (5.5mm) Round File 13252 7/32" (5.5mm) Assembled File Guide

107488 .030" (0.75mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90406 Sharpening kit FILING End View Use

Chain on this page are intended for use with saws 4.0 cu. in. displacement

(65cc) and larger, and with bars 20 in. (50 cm) and longer.

CHAIN TYPE GAUGE

26 .058" (1.3mm) 27, 27P .063" (1.5mm) MICRO-CHISEL® .404"

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

46. 42.42.

42.
Introduction
Introduction
Saw Chains

OREGON® MICRO CHISEL® Toe TOOLS FOR FILING PART N°. DESCRIPTION

70502 7/32" (5.5mm) Round File 13252 7/32" (5.5mm) Assembled File Guide

107488 .030" (0.75mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90406 Sharpening kit FILING End View Use

Ripping chains feature a special grind for use in ripping cuts only.

Do not use these chains for any type of cutting other than ripping.

CHAIN TYPE GAUGE

27R .063" (1.6mm) RIPPING CHAIN .404" RIPPING CHAIN .325"

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

47. 43.43.

43.
Introduction
Introduction
Saw Chains
OREGON

® MICRO CHISEL ® Toe TOOLS FOR FILING PART N°. DESCRIPTION

70503 3/16" (4.8mm) Round File 18228 3/16" (4.8mm) Assembled File Guide

107488 .030" (0.75mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90408 Sharpening kit FILING End View Use

Ripping chains feature a special grind for use in ripping cuts only.

Do not use these chains for any type of cutting other than ripping.

CHAIN TYPE GAUGE

95R (Micro-Lite™) .050" (1.3mm) RIPPING CHAIN .325"

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

48. 44.44.

44.
Introduction
Introduction
Saw Chains
CHIPPER
Toe
TOOLS FOR FILING

PART N°. DESCRIPTION 70502 7/32" (5.5mm) Round File

13252 7/32" (5.5mm) Assembled File Guide 107488 .030" (0.64mm) Depth-gauge Tool

12211 Depth-gauge File (flat) 90406 Sharpening kit

FILING
End View Use

Chains on this page are intended for use with saws 4.0 cu. in. displacement (65cc) and larger, and with bars 20 in. (50cm) and longer.

CHAIN TYPE GAUGE

59AC .063" (1.6mm) Kickback Reducing Features MICRO-BIT® .404" SUPER GUARD® .404"

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

49. 45.45.

45.
Introduction
Introduction
Saw Chains
OREGON

® CHISEL Toe TOOLS FOR FILING PART N°. DESCRIPTION

70502 7/32" (5.5mm) Round File 13252 7/32" (5.5mm) Assembled File Guide

27530 .025" (0.64mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

90404 Sharpening kit FILING Kickback Reducing Features

End View Use

Chains on this page are intended for use with saws 4.0 cu. in. displacement (65cc) and larger, and with bars 20 in. (50cm) and longer.

CHAIN TYPE GAUGE

58L .058" (1.5mm) 59L .063" (1.6mm) SUPER GUARD® .404"

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

50. 46.

Introduction
Introduction
Saw Chains

PART N°. DESCRIPTION 90410 5/16" (7.9mm) Round File

107617 5/16" file guide 107529 .070" (1.7mm) Depth-gauge Tool

12211 Depth-gauge File (flat) OREGON ® SEMI CHISEL

TOOLS FOR FILING
FILING
End View Use

11H chain is used only on mechanical timber harvesters, processors and pond-and-deck applications.

CHAIN TYPE GAUGE

11H .122" (3.1mm) HARVESTER, NO HAND-HELD APPLICATIONS

SEMI-CHISEL 3/4" HARVESTER CHAIN TOP-PLATE FILING

ANGLE

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE .070”

51. 47.

Introduction
Introduction
Saw Chains

OREGON® MICRO CHISEL® Toe TOOLS FOR FILING PART N°. DESCRIPTION

70502 7/32" (5.5mm) Round File 13252 7/32" (5.5mm) Assembled File Guide

39275 .050" (1.25mm) Depth-gauge Tool 12211 Depth-gauge File (flat)

FILING
End View Use

WARNING: For use on mechanized harvesting equipment only.

Depth gauges are set lower for harvester machinery; can cause high kickback on hand-held saws.

Do not use in hand-held cutting applications as severe injury to operator or bystanders may result.

CHAIN TYPE GAUGE

16H .063" (1.6mm) 18HX .080" (2.0mm)HARVESTER, NO HAND-

HELD APPLICATIONS
HARVESTER CHAIN

TOP-PLATE FILING ANGLE:

DEPTH-GAUGE SETTING:

TOP-PLATE CUTTING ANGLE:

FILE-GUIDE ANGLE

52. 48.

Introduction
Saw Chains
48.
IntroductionIntroduction
Introduction
Introduction
Introduction
Introduction
Introduction
Introduction
Introduction
Saw Chains

SAW-CHAIN TROUBLESHOOTING PROBLEM Chain cuts slow, cuts rough, or won’t hold an edge.

Most chain problems are caused by four things: incorrect chain tension, incorrect filing, lack of lubrication, cutting any material other than wood. Here are the things you should look for, and the corrective actions you should take:

Look closely at your chain’s cutters, and compare them to the 12 illustrations below.

50ϒ 20ϒ Light abrasive damage on side plates.

Remedy: See A.

Severe abrasive dama- ge on side plates.

Remedy: See A.

Abrasive or impact damage to the top plate or working corner.

Remedy: See A.

Too much top-plate filing angle.

Remedy: See B.

Too little top-plate filing angle.

Remedy: See B.

Too much top-plate-cut- ting angle.

Remedy: See C.

Too little top-plate-cutting angle.

Remedy: See D.

Too much hook in side plate.

Remedy: See C.

Backslope on side plate.

Remedy: See D.

1 2 3 4 5 6 7 8 9

53. Saw Chains

49.
Saw Chains

SAW-CHAIN TROUBLESHOOTING (CONTINUED) 10 11 12 Low depth gauges.

Remedy: See E.

High depth gauges.

Remedy: See F.

Square or blunt depth gauges.

Remedy: See G.

REMEDIES

File cutters back until all damage is removed. (pictures 1, 2, and
3)
Resharpen cutters while holding your file at the correct top-plate filing angle for your chain. Be sure your file guide is stamped with your chain’s correct top-plate angle.
(pictures 4 and 5)
Either your file was too small or it was held too low. Resharpen cutters with a file of the correct size, held in the correct position.

Use the correct file guide.

(picture 6 and 8)
Either your file was too large or it was held too high. Resharpen cutters with a file of the correct size, held in the correct position.

Use the correct file guide.

(pictures 7 and 9)
In most cases, cutters cannot be filed back enough to correct for depth gauges that are too low. Replace the chain.
(picture 10)
File depth gauges down to their correct height. (picture 11)
File the front corners of depth gauges parallel to their original rounded or ramped shape. (picture 12)

NOTE: See pages 18 through 21 for the proper filing techniques to use when performing the remedies above.

54. 50.

Introduction
Saw Chains
50.
IntroductionIntroduction
Introduction
Introduction
Introduction
Introduction
Introduction
Introduction
Introduction
Saw Chains

SAW-CHAIN TROUBLESHOOTING (CONTINUED) PROBLEM Cutters and tie straps wear heavily or break.

13 14 15 16

Bottoms of tie straps and cutters worn out of square. Remedy: See J.

Excessive heel wear on cutters and opposite tie straps.

Remedy: See H.

Cracks under rear rivet holes on cutters and opposite tie straps.

Remedy: See H.

Tie straps between cut- ters, broken in the center.

Remedy: See I.

REMEDIES

Replace worn or cracked cutters and/or tie straps.

NOTE: One or more of the following may be required to prevent future wear and/or cracks: (1) Refile cutters using the correct angles. (2) Keep more lubrication on the chain and bar. (3)

Reduce the amount of depth-gauge setting (may require replacement of the chain). (4) Do not force dull chain to cut. (5) Do not force chain through frozen wood. (6) Keep cutters sharp. (7)

Always maintain proper tension. (pictures 13 and 14)

NOTE: Such breakage is usually caused by incorrect field assembly of preset tie straps. Breakage usually occurs on the tie strap opposite the factory preset tie strap. See number 7, page 21 for correctly shaped rivets. (picture 15)
Dress the tops of the guide bar’s rails square. If wear is minor, file the bottoms of tie straps and cutters square. If wear is extensive, replace the chain. (picture16)

55. Saw Chains

51.
Saw Chains

SAW-CHAIN TROUBLESHOOTING (CONTINUED) PROBLEM Drive links wear heavily or break.

17 18 19 20 21 22 23 Straight bottoms.

Remedy: See K.

Concave bottoms.

Remedy: See K.

Battered and broken bot- toms. Remedy: See L.

Peening in front or back.

Remedy: See M.

Drive-link tang is turned up. Remedy: See N.

Worn fronts.

Remedy: See O.

Sides worn round or thin at bottoms.

Remedy: See P.

REMEDIES

Check your guide bar (grooves in bar’s body or nose have worn too shallow), and check your rim or spur drive sprocket (excessive wear is allowing drive links to bottom out).

Replace bar, sprocket, or both. Sharpen drive-ling tangs, as shown in the illustration on page 45, if possible. If not, replace the chain.

(pictures 17 and 18)
Maintain proper tension to prevent chain from climbing out of spur drive sprocket. Replace drive links or replace entire chain if many drive links are damaged. (picture 19)

56. 52.

Introduction
Saw Chains
52.
IntroductionIntroduction
Introduction
Introduction
Introduction
Introduction
Introduction
Introduction
Introduction
Saw Chains

REMEDIES: (continued)

Sprocket has worn out of pitch, replace it. Replace chain. Do not attempt to run a new chain on an old sprocket, or an old chain on a new sprocket. (picture 20, previous page)
Drive sprocket has worn down until drive link tangs hit bottom.

Replace drive sprocket. Sharpen drive-link tangs as shown in the illustration below, if possible. If not, replace the chain. (picture 21, previous page )

Remove damage from sides of drive links with a flat file. Sharpen drive-link tangs as shown in the illustration below. Use a thin file to open the groove lead-in at the guide-bar’s tail. (picture 22, previous page)
Bar rails have spread, or one rail has worn low, allowing chain to lean over. Have bar rails serviced by a dealer, otherwise replace bar. Replace chain if wear is extensive or if problem persists.
(picture 23, previous page)

NOTE: Also check bottoms of tie straps (see picture 16, page 50), and tops of bar rails (see picture 33, page 62).

SHARPENING DRIVE-LINK TANGS SAW-CHAIN TROUBLESHOOTING (CONTINUED)

Pointed drive-link tangs help remove chips and debris from your bar groove.

Sharpen damaged tangs back to original shape with a round file.

57. Saw Chains

53.
Saw Chains

SAW-CHAIN TROUBLESHOOTING (CONTINUED) PROBLEM Chain has tight joints

Tight joints are caused by either: loose tension, or a worn out drive sprocket. Look closely at your chain’s chassis.

Peening on bottoms of cutters and tie straps. Remedy: See Q.

25 26

Peening on front corners of cutters and tie straps. Remedy: See Q.

Peening in notches of cutters an tie straps. Remedy: See R.

REMEDIES

Chain with tight joints cannot be repaired. Replace the chain and maintain proper tension. Replace rim sprocket if worn. (pictures 24 and 25)
Replace the spur drive sprocket. Replace the chain. Always maintain proper tension and do not run chain on a worn drive sprocket. (picture 26)

58. 54. Introduction

Saw Chains
54.
IntroductionIntroduction
Introduction
Introduction
Introduction
Introduction
Introduction
Introduction
Introduction
Saw Chains
Saw Chains

SAW-CHAIN TROUBLESHOOTING (CONTINUED) PROBLEM Chain cuts crooked

27 28

Damage to cutters on one side of the chain. Remedy: See S.

Inconsistent sharpening. Remedy: See S.

REMEDY

File cutters back enought to remove all damage and incorrect angles. Keep cutter lengths and depth-gauge settings equal

(pictures 27 and 28).

59. 55.55.

Guide Bars
55.
Introduction
Introduction
Guide Bars
OREGON

® GUIDE-BAR TERMS CHAIN LEAD-INS RAILS GROOVE BAR-CHAIN

OIL HOLE
TAIL BAR BODY
NOSE-ATTACHMENT RIVET HOLES MOTOR MOUNT NOSE-SPROCKET
GREASE HOLE
NOSE SPROCKET
NOSE RIVETSREPLACEABLE
SPROCKET NOSE
SOLID NOSE
ARMOR TIP

OREGON® GUIDE-BAR MAINTENANCE TOOLS SPANNER WRENCH FLAT FILE WITH HANDLE

GREASE GUN BARGROOVE CLEANER

60. 56.56.

Guide Bars
56.
Introduction
Introduction
Guide Bars

OREGON® GUIDE-BAR MAINTENANCE ATTENTION:

DEALERS, CHAINSAW USERS, AND ANYONE WHO SERVICES GUIDE

BARS-IMPORTANT SAFETY INFORMATION.

For proper mounting of your guide bar, refer to the operator’s manual for your chainsaw.

NOTE: • Never use guide bar as a lever to lift, twist, or pry.

A guide bar requires constant supply of oil during operation.

BASIC GUIDE-BAR-MAINTENANCE TASKS L Before each use. G Daily.

I Often (Hourly, or at N Weekly, periodically. refueling).

LI
LG 3. LI
G Clean bar greasehole 5.G Turn nose sprocket while pumping grease until whole sprocket has new grease. Do not push dirt into the hole.
WARNING

Always turn off your saw’s engine before handling the guide bar.

Failure to do so can result in severe injury.

61. 57.57.

Guide Bars
57.
Introduction
Introduction
Guide Bars

OREGON® GUIDE-BAR MAINTENANCE 90ϒ 6. G 7. G 8. N 9. N

N With chain on the bar, hold a straightedge against the bar body and against a cutter side plate. A good groove will hold the chain straight, leaving a small gap between the straightedge and bar body.

A worn grove will let the chain lean until straightedge is flush with bar body. Replace bar if groove is worn.

N On sprocket-nose bars, check for clearance around the bar’s tip between the tops of rails and the bottoms of cutters or tie straps. Replace nose sprockets before cutters or tie straps contact the bar rails.
Oil Hole
STRAIGHT EDGE
NO CLEARANCECLEARANCE
STRAIGHT EDGECHAIN LEANS
GOOD
BAR RAILS
WORN
BAR RAILS
1/32"( 0,8 mm )

62. 58.58.

Guide Bars
58.
Introduction
Introduction
Guide Bars

HOW TO REPLACE OREGON® POWER MATCH® BAR NOSES

NOTE: Select a new Power Match ® nose with the correct pitch for your bar and chain. Reduced-kickback Double Guard

® replacement noses can be installed on any Power Match® bar and can be used with the same drive-link-count loop of chain.

Note that your OREGON

® Power Match bar nose is marked, on one side only, with an “X." Always strike on the “X"-stamped side of Power

Match

® bar noses. Striking on the wrong side will damage the nose and bar body. Use the Power Match

® nose-rivet punch (part n°.35518) to drive ou the single attaching rivet.

“X" Side Up 2. Remove the old nose. Clean the bar’s attachment area.

Insert the new nose into the bar body. Insert the Power Match
® rivet

(part n°.34726) through the underside of the nose, opposite the “X" mark.

“X" Side Up “X" Side Up

NOTE: The rivet will not fit, and cannot be secured, if inserted through the “X" side.

63. 59.59.

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Introduction
Introduction
Guide Bars
POWER MATCH® BAR NOSES (CONTINUED)
With the bar body, nose, and rivet solidly supported on a strong flat metal surface, peen the Power Match

® rivet’s head down with the flat end of a hammer. Do not hit the bar body, hit only the rivet head. Strike only on the “X" side; To ckeck installation, grip the bar body in one hand, and twist. Nose and body should feel like a single, solid piece.

If not (if any movement in the nose-bar joint area is felt-or if any clicking sound from the same area is heard), tighten the rivet with a few more hammer strokes.

“X" Side Up
File down the rails of new noses to align with the rails of old bar bodies.
Grease the new nose sprocket. Clean out guide-bar grease hole before using lubricant. Pump grease into hole until excess grease appears around the nose-sprocket teeth of the guide bar.

64. 60.60.

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Introduction
Introduction
Guide Bars

Drill or punch out heads from each of the nose- sprocket rivets. Punch out the remainder of the rivets. Use a punch narrow enough to keep from damaging rivet holes in the bar’s nose.

Use a small screwdriver to spread the bar- nose rails just enough to remove the old nose sprocket. Clean out debris from the sprocket area.

Inside the nose-sprocket package you’ll find the new sprocket wrappped in a tissue.

Be careful to keep the sprocket inside the tissue as you remove it from the package - bearings are easily lost. Slide the tissue and the new sprocket, together, into the bar’s nose.

Once fully inside the nose, hold the sprocket in place, then remove the tissue.

HOW TO REPLACE OREGON® PRO-LITE® NOSE SPROCKETS

NOTE: Select a new nose sprocket with the correct pitch for your bar and chain.

65. 61.61.

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Introduction
Introduction
Guide Bars
PRO-LITE® NOSE SPROCKETS (CONTINUED)

Grease the new nose sprocket. Clean out guide-bar grease hole before using lubricant. Pump grease into hole until excess grease appears around the nose-sprocket teeth of the guide bar.

Align the sprocket’s innerrace holes with the holes in the bar nose. Insert rivets into each hole through the bar. On used bars the nose rails may tend to spread apart. Use a small clamp to hold the nose rails together when inserting and securing the rivets.

With the bar and rivets solidy supported on a strong, flat metal surface, carefully peen the rivet heads down with the flat end of a hammer. Be careful to hit only the rivet head.

Do not hit the bar body-this will pinch the nose sprocket. Rivet heads must be snug and secure while still allowing the sprocket to turn freely.

66. 62.62.

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Introduction
Introduction
Guide Bars

Rails around the tip of solid-nose bars show small cracks or broken-out sections.

Remedy: See V.

Rail on one side is worn thin, or low.

Remedy: See U.

GUIDE-BAR TROUBLESHOOTING

Most guide bar problems occur in the bar rails, and care caused by four things: lack of lubrication, incorrect chain tension, and accidents or irregular operating techniques which pinch the rails or push the drive links sideways against the bar rails.

31 32 Rails are worn down, groove becomes shallow.

Remedy: See T.

Outsides of rails develop wire edges.

Remedy: See T.

PROBLEM
Worn Rail Conditions

33 34 35 36 Rails around the tip of solid-nose bars are split at the bottom of the bar groove.

Remedy: See V.

Rails along the bar body o around the tip of sprocket-nose bars show blue discoloration.

Remedy: See W.

67. 63.63.

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Introduction
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Guide Bars
GUIDE-BAR TROUBLESHOOTING 37 38

Chipped rails or excessive rail wear just behind the hard stellite alloy on solid-nose bars, or near the nose connection on replaceable-sprocket- nose bars.

Remedy: See X.

Rails in the tip of a sprocket-nose bar have spread, allowing loss of bearings.

Remedy: See Y.

The sprocket in a sprocket-nose bar breaks.

Remedy: See Y.

PROBLEM
Bar Sprocket-Nose Failure 39

68. 64.64.

Guide Bars
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Introduction
Introduction
Guide Bars
Guide Bars

GUIDE-BAR TROUBLESHOOTING (CONTINUED) REMEDIES: (T-Y)

Shallow grooves and wire edges are the result of normal wear over time. Use a flat file to square up the bar’s rails and remove wire edges promptly. Left alone, wire edges can break off, chipping away good rail material, (pictures 31 and 32)
A thin or low rail is caused by one of two things: (1) crooked-cutting chain, see pages 46, or (2) chain leaning over in a worn groove, see picture 23, page 44. Replace the bar. Replace the chain as well if chain continues to lean in the new bar. (picture 33)
Accidents or irregular operating techniques which push the drive links sideways or place excessive pressure on the side of the nose can cause breaks or cracks in the rails of solid-nose bars. Your dealer may be able to repair minor damage on a relatively new bar.
(pictures 34 and 35)
Pinched rails, lack of lubrication, or accidents and cutting techniques which push the drive links sideways in the groove can create extreme friction which causes blue discoloration. Blue spots on rails are soft and will wear rapidly. Replace the bar.
(picture 36, page 62)
Such wear or chipping near the nose often accompanies heavy limbing, but can also be caused by loose chain tension. Invert the bar on the saw periodically to reduce such wear. On replaceable- nose bars with minor wear, install a new nose and file down the nose’s rails as shown on pages 53 and 54 for smooth chain flow. If wear is extensive (on solid-nose or replaceable-nose bars), replace the bar. (picture 37, previous page)
Frequent boring cuts, loose chain tension, and accidents or irregular operating techniques which twist the nose or push the drive links sideways against the nose’s rails will cause such breakage. Install a new replaceable-sprocket nose if possible, otherwise replace the bar. (pictures 38 and 39, previous page)

69. 65.65.65.

Drive Sprockets
65.
Introduction
Introduction
Drive Sprockets

OREGON® SPROCKET TERMS Clutch Drum Clutch Drum Clutch Skirt

Bore
Bore

Splined Hub/Adaptator Rim Sprocket Clutch Skirt GREASE GUN

RIM SPROCKET
INSTALLING SPROCKETS
OREGON

® sprockets can be installed on chainsaws having either inboard-clutch or outboard-clutch assemblies. Follow instructions in the operator’s manual provided by your chain saw’s manufacturer for correct sprocket installation.

The illustration below are for general reference only. Do not use them as instructions for sprocket or clutch assembly.

INBOARD CLUTCH OUTBOARD CLUTCH SPUR SPROCKET OREGON

® SPROCKET-MAINTENANCE TOOLS

70. 66.66.66.

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Drive Sprockets
66.
Introduction
Introduction
Introduction
Introduction
Drive Sprockets
OREGON

® SPROCKET MAINTENANCE ATTENTION:

DEALERS, CHAINSAW USERS, AND ANYOME WHO SERVICES DRIVE SPROCKETS-IMPORTANT SAFETY INFORMATION.

Your drive sprocket, the third member of the cutting team, deserves regular attention and maintenance just like your bar and chain. A misused sprocket will cause patterns of chain wear which can damage the guide bar and reduce the life of all three components. A damaged sprocket cannot be repaired, it can only be inspected and replaced.

Here are the things to look for, and the steps to take.

BASIC SPROCKET-MAINTENANCE TASKS L Before each use. G Daily.

I Often (Hourly, or at N Weekly, periodically. refueling).

LG 2. LG
LG 4. LI
WARNING

Always turn your saw’s engine before handling the drive sprocket.

Failure to do so can result in sever injury.

71. 67.67.67.

Drive Sprockets
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Introduction
Introduction
Drive Sprockets
BASIC SPROCKET-MAINTENANCE TASKS
LI Chain tension is especially important when the saw is tipped on its side during felling cuts. Loose chain (and rim-type sprocket, if used), will slide down and out of alignment with the bar. Loose chain tension is the leading cause of sprocket problems.
N Do not run old chain on a new sprocket, or a new chain on an old sprocket. Use two new chains in rotation with each new sprocket so all can wear together. Replace sprocket every two chains, or sooner.
N Apply clean lithium-based grease to the clutch drum’s bearings each time the sprocket is removed.

Note: If your saw has a chain brake, check the chain brake’s action according to the instructions in your saw operator’s manual. Be sure the chain-brake strap around your clutch skirt is not too light, which can lead to clutch-drum overheating and failure.

G Clean any build-up of sap or debris from splined hub so rim sprocket can float freely.

72. 68.68.68.

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Drive Sprockets
68.
Introduction
Introduction
Introduction
Introduction
Drive Sprockets
SPROCKET TROUBLESHOOTING

Most sprocket problems are caused by loose chain tension and failure to replace the sprocket or clutch drum when necessary.

Sprockets are inexpensive. One worn inexpensive sprocket can rapidly damage an expensive chain and bar. Do not try to save money by running new chains on old sprockets. Look for the conditions below and replace sprockets and clutch drums promptly.

40 41 42 43 44 Excessive wear on the inside surface of the drum skirt. Remedy: See DD.

Worn outer surfaces on rim sproc- kets or spur sprockets. Remedy:

See Z.

Worn inner surface on rim sprockets or wear on the adaptator’s splines.

Remedy: See AA.

Cracks or breakage on the clutch drum. Remedy: See BB.

Obvious wear or discoloration around the outer circumference of the drum skirt. Remedy: See CC.

PROBLEM
Drive Sprocket Wear

73. 69.69.69.

Drive Sprockets
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Introduction
Introduction
Drive Sprockets
SPROCKET TROUBLESHOOTING

REMEDIES: (Z-DD)

Such outer surface wear is normal over time. Replace rim sprockets and spur sprockets when wear is 1/64" (0,4mm) deep. Never run chain on severely worn sprockets. Severely worn sprockets could break during operation. (picture 40)

AA. Such wear indicates that chain drive links are bottoming out on the adaptator’s splines. Replace the clutch drum. Replace the rim sprocket. (picture 41)

BB. Do not attempt to repair cracked or broken clutch drums. Replace the drum. (picture 42)

CC. Replace the drum. Have your chainsaw dealer adjust the chain- brake strap. (picture 43)

DD. Replace the drum. Have your chainsaw dealer service the saw’s clutch. (pictures 44)

74. 70.70.70.70.

Introduction
Useful Informations
70.
Introduction
Introduction
Introduction
Introduction
Useful Informations
HOW A CUTTER WORKS

Understanding how cutters work can help you see why proper chain maintenance is so important.

The depth gauge rides on the wood and controls the depth at which the working corner bites in.

The working corner and side plate sever the cross grains. This is the hardest part of the work.

The top-plate cutting angle chisels out the severed wood fibers,lifting them up and out of the kerf.

HOW TO ORDER REPLACEMENT CHAIN

For the best possible service, have the following saw information ready for your OREGON

® dealer.

Make and model Guide bar’s cutting length.

NOTE: Your bar’s called length is different from its overall length. The called length is the distance from the front of the saw to the tip of the farthest cutter.

Chain part number and drive link count for chain length.

EXAMPLE

OREGON® chain 72LGX-68E Overall length Cutting length (called length)

PART N°. DRIVE LINK COUNT SAW MAN 1100-A

75. 71.71.71.71.

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71.
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Useful Informations
CUTTING IN COLD WEATHER

Cutting frozen wood will cause rapid wear and possible breakage around the rear rivet hole of cutters. Follow the steps below to keep cold-weather wear to a minimum.

Dilute bar-chain oil 25 percent with clean kerosene or diesel oil. Use twice as much of this diluted oil during operation, and be certain your chain is receiving oil from the saw.

TENSION

Keep your chain correctly tensioned.

Check and adjust often.

CUTTERS

Keep cutters sharp. Touch up every hour, more often if needed.

Do not force dull chain to cut.

DEPTH GAUGES

Check and adjust your cutter’s depth gauges at every sharpening.

Keep the bar groove clean and the oil hole open.

Turn symmetrical* bars over to equalize rail wear.

Do not turn Guard Tip® bars over.
DRIVE SPROCKET

Replace the sprocket after every three chains, or sooner.

76. 72.72.72.72. Introduction

Useful Informations
72.
Introduction
Introduction
Introduction
Introduction
Useful Informations
Useful Informations
SOME GOOD SAW CHAIN ADVICE
Saw chain is made to cut only one thing: wood. Do not use saw chain to cut other materials, and never let your chain contact rocks or dirt during operation. Dirt may seem soft. But, in fact, dirt is extremely abrasive and will wear away your chain’s vital chrome plating within seconds.
Never force dull chain to cut. When it is sharp, saw chain is designed to feed itself into the wood, and needs only light pressure to cut efficiently. Dullness, or sharpness, is also indicated by the sawdust your chain is producing. Dull chain produces fine wood dust, which can clog your saw’s air filter. Sharp chain produces wood chips.

77. 73.73.

73.
Introduction
Introduction
Notes
Notes

78. Advanced Cutting Technology

www.oregonchain.co.uk

BLOUNT UK LTD
Northway Lane
Tewkesbury

GL20 8GY Tel. Sales: 01684 855490 Fax order line: 01684 855496

E-mail: sales@blount.co.uk http://www.oregonchain.co.uk

Referenced Links

http://www.oregonchain.co.uk