Oregon Maintenance and Safety Manual, MMANUAL-EN AB

Oregon ® Maintenance and Safety Manual Saw chain, Guide Bar and Drive Sprocket

You’ve got work to do, we’ve got you covered. If you have questions about your saw or cutting system, our technical support team is ready to help. Oregon Products.com OregonProductsSupport@Blount.com 800-223-5168

Table of Contents

Chainsaw Safety & Tips Chainsaw Safety. 4–9 Kickback Awareness. 5 ANSI Safety Rating . 6 Recommended Personal Protective Equipment. 8 Create a Safe Work Space. 9 Body Positioning . 9 Safe Operation. 9 Cutting Tips. 10–11 Saw Chain Saw Chain Terms. 14–15 Saw Chain Maintenance. 16–38 Four Basic Saw Chain Rules. 16 Cutter Maintenance Terminology. 18 Filing Tools . 19 Operation & Handling Care. 20 How to Lubricate Your Saw Chain. 21 How to Tension Your Saw Chain. 21 How to Sharpen Cutters. 23 How to Set Depth Gauges. 25 Square Filing. 27 Filing Angles. 30 Grinding Angles. 32 How to Install New Saw Chain Parts. 34 How to Break Out Rivets . 36 How to Break in a New Saw Chain. 38 Saw Chain Troubleshooting. 39–46 Saw Chain Identification . 47–55 High-Performance Saw Chain. 56–78 PowerCut ™ . 56 SpeedCut ™ . 65 VersaCut ™ . 67 ControlCut ™ . 70 DuraCut ™ . 73 RipCut ™ . 76 Sculptor ™ . 78 Reliable Performance Saw Chain: AdvanceCut ™ . 80–82 Specialty: PowerSharp ™ Saw Chain. 83

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Safety & Maintenance Manual

Table of Contents

Guide Bar Guide Bar Terms. 86 Guide Bar Maintenance Tools . 87 Guide Bar Maintenance. 88 Replacing PowerCut ™ Guide Bar Noses . 90 Replacing Pro-Lite® Nose Sprockets. 92 Guide Bar Troubleshooting. 94–98 Guide Bar Families. 99 Choose the Right Guide Bar. 100 Using the Guide Bar Number System. 102 Guide Bars. 104–117 Light-Weight Professional. 104 Professional. 108 Occasional User. 112 Carving. 116 Chainsaw Mounts. 118–138 Drive Sprocket Drive Sprocket Terms . 142 Drive Sprocket Maintenance Tools. 143 Installing Drive Sprockets. 143 Basic Maintenance Tasks. 144 Drive Sprocket Troubleshooting. 146 Quick Reference Filing Angles . 148 Avoiding Kickback Injury. 149 Four Basic Saw Chain Rules . 149

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Chainsaw Safety & Tips

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Chainsaw Safety

Your chainsaw is only as good as your cutting system— saw chain, guide bar, and drive sprocket. They function as a team while doing the actual work of cutting wood and therefore must be maintained as a complete system. A properly maintained saw chain, guide bar, and drive sprocket will provide excellent cutting performance and prevent damage. Equipment that has not been maintained will cut poorly and may create safety hazards. This manual addresses the maintenance of only Oregon® manufactured saw chains, guide bars, and drive sprockets. For information on maintenance and operation of your chainsaw, refer to your chainsaw’s operator’s manual or contact your local chainsaw dealer.

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.

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Chainsaw Safety

Kickback Awareness

Potential kickback situation

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

Guard Against Chainsaw Kickback • Know your personal level of chainsaw experience. • Know your saw 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 saw 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. Avoiding Kickback Injury • Be alert at all times to guard against a possible kickback reaction. Always be aware of the position of your guide bar’s nose. • Different models of saw chain are available for most cutting tasks. Use the saw chain, suitable for your type of cutting, with the lowest kickback potential. • Narrow-nose guide bars such as our ControlCut ™ guide

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Chainsaw Safety

bars are recommended for maximum kickback safety. ANSI Safety Rating If you do not have experience and specialized training for dealing with chainsaw kickback, then we urge you to use only low- kickback saw chains which have this green* label: Part numbers of Oregon® saw chain that follow the ANSI low kickback standard (paragraph 5.11.2.4) are highlighted in green. Packages of Oregon low kickback saw chain carry this authorized UL® Classification Marking:

LOW KICKBACK SAW CHAIN IN ACCORDANCE WITH ANSI/OPEI B175.1-2012, PARAGRAPH 5.11.2.4 AND WITH CSA Z62.3 This saw chain met the kickback performance

requirements of ANSI‑B175.1-2012 when tested according to the provisions of ANSI B175.1-2012. Low-kickback saw chain meets the kickback performance requirements of CSA Standard Z62.3.

Part Numbers by Gauge .043" .050"

Chain Pitch

.058"

.063"

.325 LowProfile

80TXL

— —

91P 91PS 91PX 91PXL

90PX 90SG

3/8 LowProfile

— —

— 20BPX 22BPX — M20BPX M21BPX M22BPX — 95VPX — — 21BPX

.325

3/8

— 72V

73V

75V

*Some older Oregon packaging may have low-kickback saw chain identified with a blue label. Part numbers printed in red have been obsoleted. Contact your authorized Oregon distributor for availability.

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Chainsaw Safety

Part number of Oregon® chains that do not meet ANSI low kickback performance requirements are highlighted in yellow. The chains below should be used only by those with experience and specialized training for dealing with kickback.

Chain Pitch

Part Numbers by Gauge .050" .058"

.063"

25AP 25A 25F

1/4

91VXL M91VXL 20LPX 20LGX M20LPX 95TXL

3/8 LowProfile

21LPX 21LGX M21LPX

22LPX 22LGX M22LPX

.325

72APX 72DPX 72LGX 72JGX 72LPX 72JPX

73DPX 73JGX 73LGX 73LPX

75DPX 75JGX 75LGX 75LPX

3/8

M73DPX M73LPX 73RD

M75DPX M75LPX 75RD

M72DPX M72LPX 72RD

73EXL 73EXJ

75CJ 75CK 75CL

72CJ 72CK 72CL

75EXL 75EXJ

72EXL 72EXJ

58L

27X 27AX

.404

59J 59L

68LX 68JX 27R 27RA 68CL 68CJ

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Chainsaw Safety

Recommended Personal Protective Equipment

HEAD

• Hard hat • Safety goggles/ glasses • Ear plugs/muffs

HANDS Gloves add grip and general protection.

LEGS Chainsaw pants or chaps protect against saw strikes.

FEET Safety boots and gaiters protect against saw strikes and add support on unstable terrain.

Dress Properly: Avoid clothing that is too tight or too loose.

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Chainsaw Safety

Create a Safe Work Space Caution • Plan a clear escape route away from cutting zone. • Scan worksite hazards: Check for limbs, power lines, dead trees, etc. • Calculate how the object being cut will fall. • Determine if the chainsaw may be thrown unexpectedly by the movement of the cut material. Body Positioning • If possible, position yourself away from the natural lead of the tree to avoid injury. • Never cut above shoulder level. • Never cut while in a tree or while on a ladder. • Use only a right-hand grip to hold your chainsaw (right hand on the trigger, left hand on the front handle). • Keep your left arm straight for better control. • Stand to the side of the chainsaw, never behind it. • Stand with feet well braced and your body balanced. • Keep others a minimum of two tree lengths away from the cutting area. • Do not allow others to hold wood during cutting. • Hold chainsaw firmly with both hands. Keep thumb firmly wrapped around front handle.

Saw Operation • Run engine at full throttle. • Use low-kickback saw chain and a reduced- kickback guide bar whenever possible. • Keep the chainsaw, saw chain, guide bar and drive sprocket properly maintained. • Cut only wood with your chainsaw. Do not cut any other material.

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Cutting Tips

Tension Keep your saw chain correctly tensioned. Check and adjust often.

Cutters Keep cutters sharp. Touch up the cutting edge with a file every hour, more often if needed. Do not force dull saw chain to cut.

Depth Gauges Check and adjust your cutter’s depth gauges every 3 – 4 sharpenings or more often as needed.

Guide Bar Keep the guide bar groove clean and the oil hole open. Turn symmetrical* guide bars over to equalize rail wear. *Do not turn Guard Tip® guide bars over.

Drive Sprocket Replace the drive sprocket after every two saw chains, or sooner.

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.

0° C -32° F

Oil in Cold Weather Dilute guide 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 saw chain is receiving oil from the chainsaw.

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Cutting Tips

Best Practices 1. Saw chain is made to cut only one thing: wood. Do not use saw chain to cut other materials. 2. Never let your saw chain contact rocks or dirt during operation. Dirt may seem soft. In fact, dirt is extremely abrasive and will wear away your saw chain’s vital chrome plating in less than a second. 3. Never force dull saw 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. 4. Cutting efficiency may be determined by the type of sawdust your chainsaw is producing. Dull saw chain produces fine wood dust, which can clog your chainsaw’s air filter. Sharp saw chain produces larger wood chips.

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Saw Chain

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Saw Chain Terms

Parts of a Saw Chain

Left-hand cutter

Rivet

Drive link

Right-hand cutter

Depth gauge

Tie-strap

Saw Chain Pitch Saw chain pitch is the distance between any three consecutive rivets, divided by two. Oregon® saw chain pitches are: 1/4"

.325" Low Profile 3/8" Low Profile .325" 3/8" .404"

OREGON

OREGON

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

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

Kickback-Reducing Features Bumper Drive Link Ramped Depth Gauge

Wide-Track Depth Gauge

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Saw Chain Terms

Parts of a Cutter

Working (cutting) corner

Top plate

Side plate

Gullet

Rivet hole

Depth gauge

Heel

Toe

How a Cutter Works Understanding how cutters work can help you see why proper saw chain maintenance is so important.

1. The depth gauge rides on the wood and controls the depth at which the working corner bites in. 2. The working corner and side plate sever the wood fibers across the grain. This is the hardest part of the work. 3. The top plate cutting angle chisels out the severed wood fibers, lifting them up and out of the kerf.

Saw Chain Cutter Sequence Terms

Standard

Semi-skip

Skip

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Saw Chain Maintenance

Four Basic Saw Chain Rules 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 saw chain, guide bar, and drive sprocket — and reduce safety hazards at the same time. Rule Number 1 Your saw chain must be correctly tensioned More saw chain and guide bar problems are caused by incorrect

saw chain tension than by any other single factor. • See "How to Tension your Saw Chain" on page 22.

Rule Number 2 Your saw chain must be well lubricated

A constant supply of oil to your chainsaw’s guide bar, saw chain and drive sprocket is vital. Without it, excessive friction, wear, and damage will occur.

• See "How to Lubricate your Saw Chain" on page 21

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Saw Chain Maintenance

Rule Number 3 Your saw chain must be sharp

When your saw chain is sharp, it does the work. When it’s not, you do the work — and your guide bar and drive sprocket will wear more rapidly. • See "How to Sharpen Cutters" on page 23.

• See "Filing Angles" on page 30 to find specifications for Oregon saw chain type.

Rule Number 4 Your saw chain’s depth gauges must be set correctly Depth gauge setting and depth gauge shape are critical to performance and safety. • See "How to Set Depth Gauges" on page 25.

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Saw Chain Maintenance

Cutter Maintenance Terminology

Filing

Grinding

Top-Plate Angle

Down Angle

Side-Plate Angle

Depth Gauge Setting

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Saw Chain Maintenance

Filing Tools Assembled Filing Guide

Round File

Flat File

File Handle

Sharpening Kit

Guide Bar-mounted Filing Guide

Filing Vise

Depth Gauge Tool

Grinders

Bench-model Chain Grinder

Mini Grinder

Sure Sharp® 12-Volt Grinder

Grinding Wheels

Saw Chain Repair Tools Saw Chain Breaker Rivet Spinner

Pocket Saw Chain Breaker

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Saw Chain Maintenance

Operation & Handling Care ATTENTION: DEALERS, CHAINSAW USERS, AND ANYONE WHO SERVICES SAW CHAIN. IMPORTANT SAFETY INFORMATION. Oregon ® urges you to become familiar with proper saw chain maintenance techniques, and the possible dangers which can result if saw chain is not properly maintained. WARNING : Failure to follow the instructions below can result in severe injury to the chainsaw operator, bystanders, or the person performing maintenance. Always turn off your chainsaw before performing any type of maintenance. Any one of the following conditions can increase a saw chain’s potential kickback energy, increase the risk of a saw chain throwing itself off the guide bar, or increase the risk of other hazards associated with chainsaw use.

1. Incorrect sharpening of angles. 2. Dull cutter teeth. 3. Alteration of kickback-reducing features.

4. Excessive depth gauge settings. 5. Incorrect depth gauge shapes.

6. Loose saw chain tension. 7. Incorrectly installed parts. 8. Loose rivets, cracks or breaks in any saw chain component.



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Saw Chain Maintenance

How to Lubricate your Saw Chain 1. Keep your chainsaw’s saw chain oiling system filled with clean guide bar-and-saw chain oil. 2. Never put used oil or old motor oil in your chainsaw or on your saw chain. These oils have acids and grit that will shorten the life of your cutting system. 3. Be sure your saw chain, guide bar, and drive sprocket are always receiving oil from the chainsaw during operation. 4. Fill your oil reservoir each time you fill your chainsaw’s gas tank.

How to Tension your Saw Chain with Intenz ®

WARNING : Always wear protective gloves. Read operation and handling warnings on previous page.

1. Turn the engine off. 2. Loosen the guide bar mounting nuts on the side of the chainsaw. 3. Insert a screwdriver or Scrench in the Intenz ® slot of the guide bar. 4. Turn the screwdriver or

Scrench to move the guide bar forward, away from the chainsaw as far as possible.

PATENT (BREVET) #6,061,915

5. Tighten the back guide bar mounting nut, then tighten the front nut.

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Saw Chain Maintenance

How to Tension your Saw Chain (without Intenz ® )

WARNING : Always wear protective gloves. Read "Operation & Handling Care" on page 20.

1. Turn the engine off.

Note: Never tension your saw chain right after cutting when the saw chain has expanded in length

from the heat. Saw chain tensioned while hot will contract when it cools, and can damage your guide bar and saw chain. ONLY TENSION SAW CHAIN WHEN THE SAW CHAIN HAS COOLED. 2. Loosen guide bar mounting nuts on the side of your chainsaw. 3. Pull the guide bar nose up, and keep it up as you adjust tension.

4. Adjust tension as follows:

For Solid-Nose Guide Bars Turn your chainsaw’s tension-adjustment screw until the bottoms of the lowest tie-straps and cutters come up and just touch the bottom of the guide bar rail.

For Sprocket-Nose Guide Bar Tension must be tighter than on a solid-nose guide bar. Turn your chainsaw’s tension adjustment screw until the bottoms of the lowest tie-straps and cutters come up and solidly contact the bottom of the guide bar rail.

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Saw Chain Maintenance

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

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

Note: If you have a sprocket-nose guide bar you should now perform the snap test. Grasp the saw chain along the bottom of the guide bar, pull down, and let go. Saw chain should snap back to its original position, solidly contacting the bottom of the guide bar.

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

How to Sharpen Cutters

Read "Operation & Handling Care" on page 20.

Note: • On-chainsaw sharpening requires proper saw chain tension. • See "Filing Angles" on page 30 for the correct maintenance specifications for each Oregon saw chain. • To find your Oregon saw chain type, use the "Saw Chain Drive Link Number Identification" on page 48 • If unsure of your saw chain’s type, part number or filing specification, ask your Oregon saw chain dealer. • Check and adjust depth gauges.

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Saw Chain Maintenance

Round-File Cutter Sharpening 1. Be sure 1/5th, or 20%,

60

= 1/5th or 20% above top plate

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

Direction of stroke

File holder

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

outside

inside

4. If damage is present on the chrome surface of top plates or side plates, file back until such damage is removed. 5. Keep all cutter lengths equal.

A=B

B

A

OREGON

OREGON

6. Recheck depth gauges. If resetting of the depth gauges is necessary. See "How to Set Depth Gauges" on page 25. Note: Do not file or alter the tops of kickback-reducing bumper tie-straps or bumper drive links.

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Saw Chain Maintenance

How to Set Depth Gauges

Read "Operation & Handling Care" on page 20.

Note: • On-chainsaw depth gauge setting requires proper saw chain tension ("How to Tension your Saw Chain" on page 22) prior to filing.

• "Filing Angles" on page 30 (column D) shows the correct depth gauge setting for each of the different saw chain types. • To find your Oregon ® saw chain type, use the Saw Chain Identification Chart on pages 47–55. • If unsure of your saw chain’s type or part number, ask your Oregon saw chain dealer. • Most Oregon saw chains have

a number stamped on each depth gauge indicating the correct depth gauge setting.

Example: 025" .025" (0.64 mm) Depth Gauge Setting

1. Use a depth gauge tool with the correct built-in setting for your saw chain and check your depth gauges every three or four sharpenings. 2. Place the tool on top of your saw chain so one depth gauge protrudes through the slot in the tool. 3. 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 saw chain.

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Saw Chain Maintenance

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

4. File from the inside of the round ground saw chain cutters to the outside. (For square ground saw chain, file from the outside of the cutter to the inside.)

outside

inside

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

Wide track bent over depth gauge is only filed from top down. No reshaping is necessary.

Note: On many saw 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 reshaping depth gauges.

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Saw Chain Maintenance

Square Filing Who Should Perform Square Filing?

Most chainsaw users will probably never need to use square saw chain, nor learn to perform square filing. But in areas where the timber is larger and the guide bars used are longer, the performance advantages of square saw chain can outweigh the fact that square filing is more difficult and much less forgiving of filing errors. File Positioning The file will sharpen the top plate, and the side plate, simultaneously. This creates a line, (A), where the top-plate cutting angle meets the side-plate angle. For best results, file so that the line intersects the cutting corner (B).

A

B

Correctly Filed Corner

Incorrect TOO HIGH

Incorrect TOO LOW

To properly sharpen the cutter, use the correct filing position, as shown here from three different points of view:

45˚

45˚

Side View

End View

Top View

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Saw Chain Maintenance

File Direction We recommend that square saw chain be filed from the outside in (in a downward direction). This leaves a better edge on the chromed cutting surfaces and makes it easier to

keep the file’s position, and the resulting cutting edges, in correct alignment as shown in the preceding File Positioning section. However, filing from the outside in will wear out your file faster. Some square saw chain users may prefer to file from the inside out (in an upward direction). You should be aware that inside-out filing is much more difficult. But whichever direction you choose, be sure your file and your cutting edges stay positioned as shown in the preceding File Positioning section. File all cutters on one side of the saw chain, then reverse the saw chain and repeat the process. Use the same file positions for cutters on the opposite side of the saw chain. Tools Only use files specially designed for square chisel cutters, available from your chainsaw dealer.

Double Bevel

Hexagon

“Goofy”

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Saw Chain Maintenance

Gullet Filing Approximately every fifth sharpening, clean out gullets by filing them back with a 7/32" round file. File gullets from the inside out (the side opposite from sharpening). Always leave a 1/8" shelf behind the gullet.

1/8" shelf

Before After If not cleaned out regularly, the outer edge of your gullets will eventually prevent the working corners of your cutters from getting an adequate bite into the wood.

Wrong Little or no clearance between the working corner and the gullet’s outer edge.

Right Clearance is maintained between the working corner and the gullet’s outer edge.

Depth Gauge Setting

.025"

NOTE: The depth gauge setting for all square-ground chisel saw chain is .025".

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Saw Chain Maintenance

Filing Angles

File Diameter

Note: When using the Oregon® file guide, always hold the file perpendicular to the center line of the chain.

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Saw Chain Maintenance

1/4"

25AP

30º 10º 85º .025" 5/32"

.325" Low Profile ™ 3/8" Low Profile ™

80TXL

25º 10º 70º .025" 5/32"

90PX, 90SG

4.5 mm

30º 0º 75º .025"

91P, 91PX, 91PXL 91VXL, M91VXL

30º 0º 80º .025" 5/32" 30º 0º 80º .025" 5/32" 30º 10º 70º .025" 3/16"

.325" 95VPX

20, 21, 22BPX, M20, M21, M22BPX

30º 10º 70º .025" 3/16"

95TXL

30º 10º 70º .025" 3/16"

20, 21, 22LPX, LGX, M20 , M21 , M22LPX

25º 10º 60º .025" 3/16"

3/8"

72, 73, 75V

25º 10º 60º .025" 7/32"

72, 75CJ, CK, CL

45º 45º 90º .025"

72APX, 72, 73, 75DPX, M72, M73, M75DPX 72, 73, 75EXL, EXJ, LGX, JGX , LPX, JPX M72 , M73 , M75LPX

30º 10º 80º .025" 7/32"

25º 10º 60º .025" 7/32"

25º 10º 60º .025" 7/32" 10º 10º 75º .025" 7/32" 30º 10º 65º .030" 7/32" 10º 10º 75º .030" 7/32"

72, 73, 75RD

.404" 27X, 27AX

27R, RX, RA

58CJ, CL, 59CJ, CK, CL

45º 45º 85º .025"

58, 59J, L 68LX, JX 68CJ, CL

25º 10º 60º .025" 7/32" 25º 10º 60º .030" 7/32"

45º 45º — .030"

⍟ Square-Ground Filing: A 15° cutting edge is the result when the file is held at 45° top-plate angle and 45° down angle.

Chains in red indicate items that are scheduled to be discontinued.

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Saw Chain Maintenance

Grinding Angles

Wheel Thickness

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Saw Chain Maintenance

1/4"

25AP

30º 10º 55º .025" 1/8"

.325" Low Profile ™ 3/8" Low Profile ™

80TXL

25º 10º 70º .025" 1/8"

90PX, 90SG 30º 0º 55º .025" 1/8" 91P, 91PX, 91PXL 30º 0º 55º .025" 1/8" 91VXL, M91VXL 30º 0º 55º .025" 1/8"

.325" 95VPX

30º 10º 55º .025" 3/16"

20, 21, 22BPX, M20, M21, M22BPX

30º 10º 55º .025" 3/16"

95TXL

30º 10º 55º .025" 3/16"

20, 21, 22LPX, LGX, M20 , M21 , M22LPX

25º 10º 55º .025" 3/16"

3/8"

72, 73, 75V

25º 10º 55º .025" 3/16"

72, 75CJ, CK, CL 72APX, 72, 73, 75DPX, M72, M73, M75DPX

15º 45º – .025"

30º 10º 55º .025" 3/16"

72, 73, 75EXL, EXJ, LGX, JGX , LPX, JPX 25º 10º 55º .025" 3/16" M72 , M73 , M75LPX 25º 10º 55º .025" 3/16" 72, 73, 75RD 10º 10º 50º .025" 3/16"

.404" 27X, 27AX

30º 10º 55º .030" 3/16" 10º 10º 50º .030" 3/16"

27R, RX, RA

58CJ, CL, 59CJ, CK, CL

15º 45º – .025"

58, 59J, L 68LX, JX 68CJ, CL

25º 10º 55º .025" 3/16" 25º 10º 55º .030" 3/16"

15º 45º – .030"

Chains in red indicate items that are scheduled to be discontinued.

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Saw Chain Maintenance

How to Install New Saw Chain Parts

Read "Operation & Handling Care" on page 20. Note: Use only Oregon® parts to repair Oregon saw chain, and only use parts which are the correct size and type for your saw chain. 1. Remove rivets, and parts to be replaced, as shown under "How to Break Out Rivets" on page 36. Never reassemble a saw chain with old preset tie- straps — always use new preset tie-straps. 2. 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.

OREGON

OREGON

OREGON

OREGON

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

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Saw Chain Maintenance

4. Assemble saw chain to the preset tie-strap.

5. Assemble tie-strap with brandmark, dot face up, and the notch toward the drive link tangs. Assemble bumper tie-strap in the correct direction, with the notch toward the drive link tangs.

6. Be sure parts are assembled in the correct location, sequence and direction. Check "Parts of a Saw Chain" on page 14. If unsure, ask your Oregon® dealer. 7. To form rivet heads, use an Oregon rivet spinner. Follow the instructions packaged with the rivet spinner.

WARNING : Rivet heads must be snug and secure while still allowing all joined parts to move freely. Rapid wear leading to possible saw 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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Saw Chain Maintenance

How to Break Out Rivets

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

1. Select proper anvil slot number on saw chain breaker anvil which matches the drive link number on the saw chain to be broken (see "Saw Chain Drive Link Number Identification" on page 48). 2. Insert saw chain portion for breaking into the proper slot of the saw chain anvil and push saw chain forward until bottom tie-strap is flush with the far side of slot. (Drive link is then supported on both sides of slot.)

3/8

25

72

3. Position rivet head directly under punch. Pull handle down if using a bench saw chain breaker, or hammer out rivet if using a handheld punch. Do not use excessive force. Note: Important — when breaking saw chain at cutter, make sure cutter is in the top position.

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Saw Chain Maintenance

Removing Rivets from Broken Drive Links 1. When removing rivets from broken drive links, hold the two broken segments together in their original (unbroken) positions as you tighten the saw chain link in the adjustable anvil. •

2. See steps 1 – 3 from “How to Break Out Rivets” on the previous page.

Saw Chain Drive Link Number Chart

Anvil Slot Number Drive Link Number

3/8" Low Profile™ 3/8"

.325" Low Profile™ .325"

.404"

1/4

25

80

95

90

72 27

20

91

73 58

21

75 59

22

68

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Saw Chain Maintenance

How to Break in a New Saw Chain The life of your new saw chain can be extended by taking these few simple steps before using it. 1. Oil your saw chain prior to use.

2. Never run any saw chain on a worn drive sprocket rim or spur system, especially a new saw chain. Replace your rim or spur system after every two saw chains, or sooner. •

or

3. Run new saw chain at half throttle for several minutes before doing any cutting in order to allow oil to reach all parts of the guide bar and saw chain. Allow the chainsaw and the cutting system to warm up fully. Also recommended: Dipping the saw chain in guide bar oil or drizzling oil down the length of the saw chain on the guide before running it. This gives the saw chain maximum lubrication at the bearing surfaces and rivets. 4. Stop, check saw chain tension, let saw chain cool, and adjust tension often during operation, as shown on "How to Tension your Saw Chain" on page 22

5. Keep the first several cuts light. Keep extra oil on the cutting system during these first cuts, and do not apply heavy pressure.

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Safety & Maintenance Manual

Saw Chain Troubleshooting

Most Saw Chain Problems are Caused by Four Things: 1. Incorrect saw chain tension 2. Incorrect filing 3. Lack of lubrication

4. Cutting any material other than wood.

Here are the things you should look for, and the corrective actions you should take:

Problem: Cuts Slow/Rough or Won’t Hold Edge Look closely at your saw chain’s cutters and compare them to the following illustrations.

1. Light abrasive damage on side plates. Cause: Cutters came in contact with light abrasive materials. Symptoms: Very slow cutting Remedy: File cutters back until all damage is removed. 2. Severe abrasive damage on side and/or top-plates. Cause: Cutters hit or cut material other than wood, such as rock, dirt, or sand. This type of damage typically occurs when cutting close to the ground. Symptoms: Saw chain won’t cut or cuts crookedly if the damage is to one side of saw chain. Possible guide bar rail damage. Remedy: File cutters back until all damage is removed. 3. Too much top-plate filing angle. Cause: Excessive top-plate angle while filing or grinding. Symptoms: Cutting angle is very sharp, but dulls fast. Cutting action rough and erratic. Remedy: Resharpen cutters while holding the file at the correct top-plate filing angle for the saw chain. Be sure the file guide is stamped with the saw chain’s correct top-plate angle. 20˚

50˚

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Saw Chain Troubleshooting

4. Too little top-plate filing angle. Cause: Filed or ground at less than the recommended angle. Symptoms: Slow cutting. Requires extra effort to cut. Possible binding in cut. Remedy: Resharpen cutters while holding the file at the correct top-plate filing angle for the saw chain. Be sure the file guide is stamped with the saw chain’s correct top-plate angle. 5. Too much top-plate cutting angle. Cause: File held too low or file is too small. Grinders: Saw chain ground at the wrong top- plate cutting angle or using an incorrectly-sized grinding wheel. Symptom: Poor stay-sharp. Rapid dulling. Cuts fast for a short time, then dulls. Remedy: Resharpen cutters with the correct file in the right size, held in the correct position. Use correct file guide. 6. Too little top-plate cutting angle. Cause: File held too high or file is too large. Grinders: Saw chain ground at the wrong top plate cutting angle or an incorrectly sized grinding wheel. Symptoms: Slow cutting. Premature wear to saw chain and guide bar rails. Remedy: Resharpen cutters using the correct file guide that is the right size and in the correct position. 7. Too much hook in the side plate. Cause: File held too low or the file is too small. Grinders: Saw chain ground at the wrong top- plate cutting angle, grinding wheel is too small or is grinding too deep into the body of cutter. Symptoms: Rough cutting. Saw chain grabs. Cutters dull quickly or won’t hold cutting edge. Top plate breakage and/or saw chain stretch. Remedy: Resharpen cutters using the correct file in the right size held in the correct position.

20˚

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Saw Chain Troubleshooting

8. Backslope on the side plate. Cause: File held too high or the file is too large. Grinders: Saw chain ground at the wrong top- plate cutting angle, grinding wheel is too large, or the grinding wheel is not grinding deep enough into the body of cutter. Symptoms: Slow cutting. Premature wear to saw chain and guide bar rails. Remedy: Resharpen cutters using the correct file guide in the right size held in the correct position. 9. Low depth gauges. Cause: Too much depth gauge removed; depth gauge damaged in use. Symptoms: Rough cutting. Saw chain grabs. Excessive wear to the heel of cutters, opposing tie-straps, guide bar rails. Top-plate breakage and/or saw chain stretch. Remedy: In most cases, cutters cannot be filed back enough to correct for depth gauges that are too low. Replace the saw chain. 10. High depth gauges. Cause: Depth gauge never lowered. Symptoms: Slow cutting. Excessive wear to the saw chain and guide bar rails. Remedy: File depth gauges down to their correct height.

NOTE: Refer to "How to Sharpen Cutters" on page 23 when performing the remedies above.

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Saw Chain Troubleshooting

Problem: Cutters & Tie-Straps Wear Heavily or Break

11. Excessive heel wear on cutters and opposite tie-straps; cracks under rear rivet holes. Cause: Forcing dull saw chain to cut. Low depth gauge settings. Lack of lubrication. Loose saw chain tension. Symptoms: Excessive heel wear on cutters. Saw chain breakage. Excessive saw chain stretch. Remedy: 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 saw chain and guide bar. (3) Reduce the amount of depth gauge setting (may require replacement of the saw chain). (4) Do not force dull saw chain to cut. (5) Do not force saw chain through frozen wood. (6) Keep cutters sharp. (7) Always maintain proper tension. 12. Tie-straps or cutters, broken in the center. Cause: Incorrect field assembly of saw chain components. Symptoms: Broken tie-straps or cutters. Remedy: Replace broken components. 13. Bottoms of tie-straps and cutters worn out of square. Cause : Worn guide bar rails. Symptoms: Bottoms of tie-straps and cutters worn out of square. Remedy: 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 saw chain.

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Safety & Maintenance Manual

Saw Chain Troubleshooting

Problem: Drive Links Wear Heavily or Break

14. Straight or concave bottoms. Cause: Straight bottoms are due to shallow guide bar body groove. Concave bottoms are due to shallow guide bar nose groove. Symptoms: Drive link tangs worn straight or concave. Drive links can’t clean guide bar groove. Tendency to throw saw chain from guide bar. Remedy: Replace guide bar, drive sprocket, or both. Sharpen drive link tangs, as shown in the "Sharpening Drive Link Tangs" on page 44, if possible. If not, replace the saw chain. 15. Battered and broken bottoms. Cause: Worn or broken drive sprocket. Loose saw chain tension or saw chain jumping from guide bar groove. Results in damage from revolving drive sprocket. Symptoms: Drive links are burred or nicked. Drive links may not fit in guide bar groove. Drive links can’t clean the guide bar groove. Remedy: Maintain proper tension to prevent saw chain from climbing out of spur drive sprocket. Replace drive links or replace entire saw chain if many drive links are damaged. 16. Peening in front or back. Cause: Worn drive sprocket. Pin sprocket systems are known to concentrate load to the back of drive link, causing premature wear. Symptoms: Change in drive link shape. Tight joints in the saw chain. Saw chain stretch. Shortened saw chain life. Remedy: Replace the drive sprocket and/ or pins. Replace saw chain. Do not attempt to run a new saw chain on an old drive sprocket, or an old saw chain on a new drive sprocket.

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Saw Chain Troubleshooting

17. Drive link tang turned up. Cause: Worn drive sprocket.

Symptoms: Drive link tangs hit the bottom. Remedy: Replace drive sprocket. Sharpen drive link tangs as shown in the illustration below, if possible. If not, replace the saw chain. 18. Sides worn round or thin at bottoms. Cause: Guide bar rails have spread, or one rail has worn low, allowing saw chain to lean over. Symptoms: Saw chain cuts crookedly. Accelerated guide bar rail and saw chain wear. Remedy: Have guide bar rails serviced by a dealer, otherwise replace guide bar. Replace saw chain if wear is extensive or if problem persists. NOTE: Also check bottoms of tie-straps and tops of guide bar rails for damage.

Sharpening Drive Link Tangs

Pointed drive link tangs help remove chips and debris from your guide bar groove. Sharpen damaged tangs back to their original shape with a round file.

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Safety & Maintenance Manual

Saw Chain Troubleshooting

Problem: Saw Chain Has Tight Joints

19. Peening on bottom or front of cutters and tie-straps. Cause: Improper saw chain tension or a worn out drive sprocket. Symptoms: Saw chain stretch or saw chain breakage. Remedy: Saw chain with tight joints cannot be repaired. Replace the saw chain and maintain proper tension. Replace the rim drive sprocket if worn. 20. Peening in notches of cutters and tie-straps. Cause: Worn spur drive sprocket. Symptoms: Saw chain stretch or saw chain breakage. Remedy: Replace the spur drive sprocket. Replace the saw chain. Always maintain proper tension and do not run saw chain on a worn drive sprocket.

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Saw Chain Troubleshooting

Problem: Cuts Crooked / Leans to One Side / Cuts Unevenly

21. Damage to cutters on one side of saw chain. Cause: Cutters on one side of saw chain are damaged by hitting the saw box or the ground/debris. Symptoms: Guide bar and saw chain bind in the cut. Could result in guide bar and saw chain breakage when removing the guide bar from tree. Uneven guide bar rail wear. Remedy: File cutters back enough to remove all damage. Square up guide bar rails if uneven.

22. Different cutter top-plate lengths Cause: Inconsistent sharpening.

Symptoms: Guide bar and saw chain bind in the cut. Could result in guide bar and saw chain breakage when removing the guide bar from tree. Uneven guide bar rail wear. Remedy: File cutters back to even cutter top-plate lengths. Square up guide bar rails if uneven.

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Safety & Maintenance Manual

Saw Chain Identification

Oregon® Families To help easily identify our tiers of products, packaging is differentiated by color. Product within families meeting the needs of occasional users will be indicated by gray packaging. Product families targeted at demanding professional users will be indicated by black packaging. PowerCut™

ControlCut™ Ideal for property owners and professionals looking for additional control, delivering a smooth cut every single time. Easy to maintain, with a forgiving sharpening profile. DuraCut™ Made for woodcutters working in abrasive and tough environments. Advanced plating process with extra layers of chrome. Cut up to three times longer than conventional saw chain. RipCut™ Created specifically for chain- supreme efficiency to make precise boards and planks. AdvanceCut™ Perfect for homeowners cutting trees on their property and for tree-cutting professionals who only need to occasionally cut wood. User-friendly because of the low kickback design. type sawmills. Produces smooth ripping cuts with

The ultimate saw chain for loggers and skilled forest workers. Full chisel cutters power through timber with speed, efficiency, and precision. SpeedCut™ Faster, cutting performance for wood-cutting professionals and experienced homeowners alike. Narrow kerf system requires less power to cut through high volumes of wood quickly and easily. VersaCut™ Designed for tree-cutting professionals who require high performance from their saw chain. Uses cutters designed for maximum durability and versatility.

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Saw Chain Identification

Saw Chain Drive Link Number Identification Nearly all Oregon® saw chains are named by a part number made up of a number (see below), followed by one, two or three letters (see next page). Part number Examples: 72LPX, 91PX The Numbers: 72 LPX, 91 PX The numbers are stamped on the saw chain’s drive links and indicate the physical size of the saw chain (pitch and gauge).

72 72 72 Chain Number

Gauge

Pitch

in.

mm

25

1/4"

.050"

1.3

.325" Low Profile ™ 3/8" Low Profile ™ 3/8" Low Profile ™

80

.043"

1.1

90

.043"

1.1

91

.050"

1.3

.325"

.050"

1.3

20

.325"

.050"

1.3

95

21

.325"

.058"

1.5

22

.325"

.063"

1.6

72

3/8"

.050"

1.3

73

3/8"

.058"

1.5

75

3/8"

.063"

1.6

26, 58

.404" .404"

.058" .063"

1.5 1.6

27, 59, 68

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Safety & Maintenance Manual

Saw Chain Identification

How to Order Replacement Saw Chain For the best possible service, have the following chainsaw information ready for your Oregon® dealer.

1. Make and model

SAW MAN 1100-A

2. Guide bar’s cutting length

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

Cutting length (called length)

Overall length

3. Saw chain part number and drive link count for saw chain length.

EXAMPLE: Oregon® saw chain 72LGX-068G

Part Number Drive Link Count

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Saw Chain Identification

Round Ground

Kickback- Reducing Features (if any)*

Cutter Sequence

Part

Type

Gauge

Cutter Type

Side View

in.

mm End View

1/4"

Micro Chisel®

25AP

ControlCut ™ .050" 1.3

Standard

.325" Low Profile ™

Micro Chisel

80TXL

SpeedCut ™ .043" 1.1

Standard

3/8" Low Profile ™

Chamfer Chisel®

90PX

AdvanceCut ™ .043" 1.1

Standard

Chamfer Chisel

91PX

AdvanceCut .043" 1.3

Standard

Semi-Chisel

91PXL

ControlCut .043" 1.3

Standard

Semi-Chisel

91VXL

.050" 1.3

Standard

VersaCut ™

Semi-Chisel

M91VXL

.050" 1.3

Standard

DuraCut ™

*Refer to the "Kickback-Reducing Features" on page 14 for all kickback icons. Chains in red indicate items that are scheduled to be discontinued.

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Safety & Maintenance Manual

Saw Chain Identification

Round Ground

Kickback- Reducing Features (if any)*

Cutter Sequence

Part

Type

Gauge

Cutter Type

Side View

in.

mm End View

.325"

Micro Chisel®

20BPX 21BPX 22BPX

.050" .058" .063"

1.3 1.5 1.6

Standard

ControlCut ™

Micro Chisel

SpeedCut ™

95TXL 95VPX

.050" 1.3

Standard

Chisel

20LPX 21LPX 22LPX

.050" .058" .063"

1.3 1.5 1.6

Standard

PowerCut ™

Chisel

20LGX 21LGX 22LGX

.050" .058" .063"

1.3 1.5 1.6

Standard

PowerCut

Micro Chisel

M20BPX M21BPX M22BPX

.050" .058" .063"

1.3 1.5 1.6

Standard

DuraCut ™

Chisel

M20LPX M21LPX M22LPX

.050" .058" .063"

1.3 1.5 1.6

Standard

DuraCut

*Refer to the "Kickback-Reducing Features" on page 14 for all kickback icons. Chains in red indicate items that are scheduled to be discontinued.

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