Oregon Chain Saw Maintenance & Safety Manual
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Oregon Chain Saw Maintenance & Safety Manual

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Safety Manual

Advanced Cutting Technology

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Summary of Contents for Oregon Chain Saw

  • Page 1: Safety Manual

    Maintenance & Safety Manual Advanced Cutting Technology...
  • Page 2 Introduction 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.

  • Page 3: Introduction

    Introduction 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.
  • Page 4 Introduction CHAINSAW SAFETY CLOTHING AND PROTECTIVE EQUIPMENT Wear hard hat to protect head. Wear protective gloves to prevent slippage and to protect hands. Wear ear protection to protect ears. Wear chainsaw protective boots or safety boots and Wear safety goggles or gaiters to protect feet.

  • Page 5: Table Of Contents

    Contents INTRODUCTION GUIDE BARS Introduction ......Guide bar terms ....55 Chainsaw safety ...... Guide bar maintenance tools ........55 CHAIN Guide bar maintenance ... 56-57 Chain Terms ......2 How to replace Chain Pitch ......2 Power Match noses ..58-59 ®...

  • Page 6: Chain Terms

    Saw Chains 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". CHAIN GAUGE Chain gauge is the drive link’s thickness where it fits into the guide-bar groove.

  • Page 7: Parts Of A Saw Chain

    Saw Chains 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 Preset Bumper Tie Strap Drive Link Left-hand Cutter Bumper Tie Strap Ramped...

  • Page 8: Chain Maintenance Tools

    Saw Chains OREGON CHAIN-MAINTENANCE TOOLS ® FILING TOOLS – ASSEMBLED FILE GUIDE — SHARPENING KIT ™ š ˜ FLAT FILE DEPTH-GAUGE TOOL ROUND FILE œ  › FILE HANDLE FILING VISE BAR-MOUNTED FILING GUIDE GRINDERS — ˜ – BENCH-MODEL MINI GRINDER SURE SHARP ®...

  • Page 9: Chain Identification Chart

    Saw Chains CHAIN IDENTIFICATION OREGON FILING OREGON CHAIN GAUGE CUTTER TYPE CUTTER KICKBACK ® ® CHAIN SPEC’S CHAIN SIDE SEQUENCE REDUCING PART TYPE FEATURES VIEW VIEW (IF ANY)* 1/4" PITCH CHAIN MICRO CHISEL STANDARD ® Page MICRO 25AP 050" CHISEL ®...
  • Page 10 Saw Chains CHAIN IDENTIFICATION OREGON FILING OREGON CHAIN GAUGE CUTTER TYPE CUTTER KICKBACK ® ® CHAIN SPEC’S CHAIN SIDE SEQUENCE REDUCING PART TYPE FEATURES VIEW VIEW (IF ANY)* 3/8" PITCH CHAINS SEMI-CHISEL STANDARD 050" Page 72DX/DPX S-70 058" 73DX/DPX 063" 75DX/DPX (LG) CHISEL...
  • Page 11 Saw Chains CHAIN IDENTIFICATION OREGON FILING OREGON CHAIN GAUGE CUTTER TYPE CUTTER KICKBACK ® ® CHAIN SPEC’S CHAIN SIDE SEQUENCE REDUCING PART TYPE FEATURES VIEW VIEW (IF ANY)* .404" PITCH CHAINS MICRO CHISEL STANDARD ® Page 063" HARVESTER 18HX 080" P ONLY MICRO CHISEL STANDARD...

  • Page 12: Chain Drive-Link Number Identification

    Saw Chains 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 ®...

  • Page 13: Chain Letter Identification

    Saw Chains 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. Chipper Cutter, Specially built chain with Standard Sequence round-ground chisel cutters (M73, 75LPX, M21,22LPX) Micro Chisel Cutter,...

  • Page 14: Four Basic Rules

    Saw Chains 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.
  • Page 15 Saw Chains 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.

  • Page 16: How To Maintain The Chain

    Saw Chains 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.

  • Page 17: How To Tension Chain

    Saw Chains HOW TO TENSION YOUR CHAIN WITHOUT INTENZ™ Read the warnings on page 12. 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.
  • Page 18 Saw Chains 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. š...

  • Page 19: How To Lubricate Chain

    Saw Chains 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. ™...

  • Page 20: How To Set Depth Gauges

    Saw Chains HOW TO SET DEPTH GAUGES Read the warnings on page 12. 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.

  • Page 21: Gauges

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

  • Page 22: How To Sharpen Cutters

    Saw Chains 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.

  • Page 23: How To Sharpen Cutters

    Saw Chains 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 ™...

  • Page 24: How To Install Chain Parts

    Saw Chains 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. –...
  • Page 25 Saw Chains HOW TO INSTALL NEW CHAIN PARTS ™ Assemble chain to the preset tie strap. š 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.

  • Page 26: How To Break Out Rivets

    Saw Chains 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).

  • Page 27: How To Break Out Rivets

    Saw Chains HOW TO BREAK OUT RIVETS 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. —...

  • Page 28: How To Run-In A New Chain

    Saw Chains 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.

  • Page 29: End-User Symbols

    Saw Chains 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.

  • Page 30: Filing Specifications

    1/4" ® ICRO HISEL OREGON MICRO CHISEL ® ® Kickback End View Reducing Features CHAIN TYPE GAUGE 25AP .050" (1.3mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70504 5/32"...
  • Page 31 325'' ® ICRO HISEL OREGON MICRO CHISEL ® ® Kickback End View Reducing Features CHAIN TYPE GAUGE 20BPX .050" (1.3mm) 21BPX .058" (1.5mm) 22BPX .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°.
  • Page 32 20 .325" UPER OREGON CHISEL ® Kickback End View Reducing Features CHAIN TYPE GAUGE 20LPX .050" (1.3mm) 21LPX .058" (1.5mm) 22LPX .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°.
  • Page 33 3/8" ROFILE OREGON SEMI CHISEL ® Kickback End View Reducing Features CHAIN TYPE GAUGE 91VXL .050" (1.3mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70504 5/32" (4.0mm) Round File 16265 5/32"...
  • Page 34 .325" ICRO OREGON MICRO CHISEL ® ® Kickback End View Reducing Features CHAIN TYPE GAUGE 95VPX .050" (1.3mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70503 3/16"...
  • Page 35 .325" ULTICUT OREGON CHISEL ® Kickback End View Reducing Features CHAIN TYPE GAUGE M21LPX .058" (1.5mm) M22LPX .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70503 3/16"...
  • Page 36 3/8" ULTICUT OREGON CHISEL ® Kickback End View Reducing Features CHAIN TYPE GAUGE M73LPX .058" (1.5mm) M75LPX .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70502 7/32"...
  • Page 37 S-70 3/8" OREGON SEMI CHISEL ® Kickback End View Reducing Features Only for DPX CHAIN TYPE GAUGE 72DX, DPX .050" (1.3mm) 73DX, DPX .058" (1.5mm) 75DX, DPX .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜...
  • Page 38 3/8" ® UPER UARD OREGON CHISEL ® ® Kickback End View Reducing Features CHAIN TYPE GAUGE 72LGX .050" (1.3mm) 73LGX .058" (1.5mm) 75LGX .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°.
  • Page 39 70 3/8" UPER OREGON CHISEL ® ® Kickback End View Reducing Features CHAIN TYPE GAUGE 72LPX .050" (1.3mm) 73LPX .058" (1.5mm) 75LPX .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°.
  • Page 40 3/8" IPPING HAIN OREGON SEMI CHISEL ® End View CHAIN TYPE GAUGE 72RD .050" (1.3mm) 73RD .058" (1.5mm) 75RD .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70502 7/32"...
  • Page 41 3/8" IPPING OW PROFILE OREGON CHAMFER CHISEL ® End View CHAIN TYPE GAUGE .050" (1.3mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70504 5/32" (4.0mm) Round File 16265 5/32"...
  • Page 42 ICRO OREGON MICRO-LITE™ ® Kickback End View Reducing Features CHAIN TYPE GAUGE 90SG .043" (1.1mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70511 4.5mm Round File 29192 4.5mm Assembled File Guide 27530...
  • Page 43 3/8" ROFILE OREGON CHAMFER CHISEL ® Kickback End View Reducing Features CHAIN TYPE GAUGE 91VX .050" (1.3mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70504 5/32" (4.0mm) Round File 16265 5/32"...
  • Page 44 3/8" ® UARD OREGON CHAMFER CHISEL ® Kickback End View Reducing Features CHAIN TYPE GAUGE 91VG .050" (1.3mm) Reduced kickback chain FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70504 5/32"...
  • Page 45 .404" ® ICRO HISEL OREGON MICRO CHISEL ® ® End View CHAIN TYPE GAUGE .058" (1.3mm) 27, 27P .063" (1.5mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70502 7/32"...
  • Page 46 .404" IPPING HAIN OREGON MICRO CHISEL ® ® End View CHAIN TYPE GAUGE .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70502 7/32" (5.5mm) Round File 13252 7/32"...
  • Page 47 .325" IPPING HAIN OREGON MICRO CHISEL ® ® End View CHAIN TYPE GAUGE .050" (1.3mm) (Micro-Lite™) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70503 3/16" (4.8mm) Round File 18228 3/16"...
  • Page 48 .404" ® ICRO CHIPPER Kickback End View Reducing Features CHAIN TYPE GAUGE 59AC .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70502 7/32" (5.5mm) Round File 13252 7/32"...
  • Page 49 .404" ® UPER UARD OREGON CHISEL ® Kickback End View Reducing Features CHAIN TYPE GAUGE .058" (1.5mm) .063" (1.6mm) FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 70502 7/32"...
  • Page 50 3/4" HISEL OREGON SEMI CHISEL ® End View CHAIN TYPE GAUGE .122" (3.1mm) HARVESTER, NO HAND-HELD APPLICATIONS FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: .070” TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°. DESCRIPTION 90410 5/16"...
  • Page 51 ARVESTER HAIN OREGON MICRO CHISEL ® ® End View CHAIN TYPE GAUGE .063" (1.6mm) HARVESTER, NO HAND- 18HX .080" (2.0mm) HELD APPLICATIONS FILING DEPTH-GAUGE TOP-PLATE CUTTING ANGLE: – — SETTING: TOP-PLATE FILING FILE-GUIDE ˜ ™ ANGLE: ANGLE TOOLS FOR FILING PART N°.

  • Page 52: Chain Troubleshooting

    Saw Chains SAW-CHAIN TROUBLESHOOTING 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: PROBLEM Chain cuts slow, cuts rough, or won’t hold an edge.
  • Page 53 Saw Chains SAW-CHAIN TROUBLESHOOTING (CONTINUED) Low depth gauges. High depth gauges. Square or blunt depth Remedy: See E. Remedy: See F. gauges. Remedy: See G. REMEDIES: A. File cutters back until all damage is removed. (pictures 1, 2, and B. Resharpen cutters while holding your file at the correct top-plate filing angle for your chain.
  • Page 54 Saw Chains SAW-CHAIN TROUBLESHOOTING (CONTINUED) PROBLEM Cutters and tie straps wear heavily or break. Excessive heel wear on Cracks under rear rivet Tie straps between cut- cutters and opposite tie holes on cutters and ters, broken in the center. straps. opposite tie straps.
  • Page 55 Saw Chains SAW-CHAIN TROUBLESHOOTING (CONTINUED) PROBLEM Drive links wear heavily or break. Straight bottoms. Concave bottoms. Battered and broken bot- Remedy: See K. Remedy: See K. toms. Remedy: See L. Peening in front or back. Drive-link tang is turned Worn fronts. Remedy: See M.
  • Page 56 Saw Chains SAW-CHAIN TROUBLESHOOTING (CONTINUED) REMEDIES: (continued) M. 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) N.
  • Page 57 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. Peening on front corners of cutters and tie straps.
  • Page 58 Saw Chains Saw Chains SAW-CHAIN TROUBLESHOOTING (CONTINUED) PROBLEM Chain cuts crooked 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).

  • Page 59: Guide Bars

    Guide Bars OREGON GUIDE-BAR TERMS ® GROOVE CHAIN LEAD-INS RAILS NOSE-ATTACHMENT RIVET HOLES NOSE-SPROCKET GREASE HOLE BAR-CHAIN MOTOR OIL HOLE NOSE SPROCKET MOUNT NOSE RIVETS REPLACEABLE SPROCKET NOSE BAR BODY TAIL SOLID NOSE ARMOR TIP OREGON GUIDE-BAR MAINTENANCE TOOLS ® SPANNER WRENCH FLAT FILE WITH HANDLE BARGROOVE CLEANER...
  • Page 60 Guide Bars OREGON GUIDE-BAR MAINTENANCE ® ATTENTION: DEALERS, CHAINSAW USERS, AND ANYONE WHO SERVICES GUIDE BARS-IMPORTANT SAFETY INFORMATION. WARNING Always turn off your saw’s engine before handling the guide bar. Failure to do so can result in severe injury. For proper mounting of your guide bar, refer to the operator’s manual for your chainsaw.

  • Page 61: Guide Bar Maintenance

    Guide Bars OREGON GUIDE-BAR MAINTENANCE ® Oil Hole 90ϒ 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.

  • Page 62: How To Replace

    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.
  • Page 63 Guide Bars POWER MATCH BAR NOSES (CONTINUED) ® 4. 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"...

  • Page 64: Sprockets

    Guide Bars HOW TO REPLACE OREGON PRO-LITE NOSE ® ® SPROCKETS NOTE: Select a new nose sprocket with the correct pitch for your bar and chain. – Drill or punch out heads from each of the nose- sprocket rivets. Punch out the remainder of the rivets.

  • Page 65: Sprockets

    Guide Bars PRO-LITE NOSE SPROCKETS (CONTINUED) ® › 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.

  • Page 66: Guide Bar Troubleshooting

    Guide Bars 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. PROBLEM Worn Rail Conditions Rails are worn down, groove...
  • Page 67 Guide Bars GUIDE-BAR TROUBLESHOOTING PROBLEM Bar Sprocket-Nose Failure 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.
  • Page 68 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) U.

  • Page 69: Drive Sprockets

    ® 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.

  • Page 70: Sprocket Maintenance

    Drive Sprockets OREGON SPROCKET MAINTENANCE ® ATTENTION: DEALERS, CHAINSAW USERS, AND ANYOME WHO SERVICES DRIVE SPROCKETS-IMPORTANT SAFETY INFORMATION. WARNING Always turn your saw’s engine before handling the drive sprocket. Failure to do so can result in sever injury. Your drive sprocket, the third member of the cutting team, deserves regular attention and maintenance just like your bar and chain.

  • Page 71: Sprocket Maintenance

    Drive Sprockets BASIC SPROCKET-MAINTENANCE TASKS 5. 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.

  • Page 72: Sprocket Troubleshooting

    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.

  • Page 73: Troubleshooting

    Drive Sprockets SPROCKET TROUBLESHOOTING REMEDIES: (Z-DD) Z. 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.

  • Page 74: Useful Information

    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. —...

  • Page 75: Useful Information

    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.
  • Page 76 Useful Informations Useful Informations SOME GOOD SAW CHAIN ADVICE 1. 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.
  • Page 77 Notes...
  • Page 78 BLOUNT EUROPE SA/NV Rue Emile Francqui, 5 B-1435 Mont-Saint-Guibert, Belgium + 32 10 30 11 11 + 32 10 30 11 99 Advanced Cutting Technology...

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