This Maintenance & Safety Manual supercedes and replacesall previous Oregon®Maintenance & Safety ManualsPrinted in USAF/N A106971 AG 0904Orego
6Saw ChainOREGON®CHAIN-MAINTENANCE TOOLSFILING TOOLS햲ASSEMBLED FILE GUIDE 햳SHARPENING KITS*Asst’d. P/N’s *Asst’d. P/N’s햴ROUND FILE햵FLAT FILE햶DEPTH-GAU
96Saw ChainREAD THE WARNING ON PAGE 17.Cutting frozen wood will cause rapid wearand possible breakage around the rear rivethole of cutters. Follow the
97THE OREGON®CUSTOMER-SATISFACTION POLICYLIMITED WARRANTYOregon®(Oregon Cutting Systems Division, Blount, Inc.)warrants its products to be free from d
Notes_________________________________________________________________________________________________________________________________________________
OREGON®CHAIN-MAINTENANCE TOOLSGRINDERSSURE SHARP®BENCH-MODELGRINDING WHEELS12-VOLT CHAIN GRINDER FOR 511A GRINDERGRINDER P/N 511A *Asst’d. P/N’sP/
8Saw Chain511-A GRINDER WHEELSGRINDING WHEEL GRINDING WHEEL CORRESPONDSPART NUMBER WIDTH TO FILE SIZEDIAMETER(S)OR534-18 1/8" 5/32" or 4.5mm
CHAIN IDENTIFICATIONOREGON®FILING OREGON®CHAIN CUTTER TYPE CUTTER KICKBACK-CHAIN SPEC’S CHAIN GAUGE SEQUENCE REDUCINGPART TYPE END SIDE FEATURES NUMBE
10Saw ChainCHAIN IDENTIFICATION (CONTINUED)OREGON®FILING OREGON®CHAIN CUTTER TYPE CUTTER KICKBACK-CHAIN SPEC’S CHAIN GAUGE SEQUENCE REDUCINGPART TYPE
11Saw ChainCHAIN IDENTIFICATION (CONTINUED)OREGON®FILING OREGON®CHAIN CUTTER TYPE CUTTER KICKBACK-CHAIN SPEC’S CHAIN GAUGE SEQUENCE REDUCINGPART TYPE
12Saw ChainCHAIN DRIVE-LINK NUMBER IDENTIFICATIONNearly all Oregon®chains are named by a part number made up of a number (see below), and letters (see
13Saw ChainCHAIN LETTER IDENTIFICATIONThe Letters: 27A, 72LP , 91VG , M 72LPThe letters represent cutter type and sequence, kick-back-reducing fe
14Saw ChainJGRound-ground chiselcutters with rampeddepth gauges, bumper tie straps and skip sequence JPRound-ground chiselcutters with bumperdrive l
15Saw ChainTHE FOUR BASIC SAW-CHAIN RULESATTENTION CHAINSAW USERS:Oregon®urges you to become familiar with the fourbasic saw-chain rules. Users who kn
Chainsaw SafetyIMPORTANT SAFETY MESSAGESAFETY SYMBOL: This safety symbol is used to highlight safety messages. When you see this symbol, read and foll
16Saw ChainRULE NUMBER 3 YOUR CHAIN MUST BE SHARPWhen your chain is sharp, it does the work. When it’snot, you do the work – and your cutting attachme
17Saw ChainHOW TO MAINTAIN CHAINATTENTION: Oregon® urges dealers, chainsaw users,and anyone who services saw chain to become familiarwith proper chain
18Saw ChainHOW TO TENSION YOUR CHAIN▲Tension chain before each use Tension chain often, or at each refuelingNever tension your chain right after cutt
19Saw ChainHOW TO TENSION YOUR CHAIN(3a CONTINUED)Turn your saw’s tension-adjustment screw until thebottoms of the lowest tie straps and cutters come
20Saw ChainHOW TO TENSION YOUR CHAIN (CONTINUED)3c. IF YOU HAVE AN INTENZ®SPROCKET-NOSE BARTurn the tension-adjustslot until the bottomsof the lowest
21Saw Chain5. Check tension often during operation, especiallyduring the first half-hour. If chain loosens: stop, letchain cool, and readjust tension.
22Saw ChainHOW TO SHARPEN CHAIN▲ Sharpen chain before each use. Sharpen chain often, or as needed. READ THE WARNING ON PAGE 17.Sharpening your chain
23Saw Chain• Abnormal chain wear.• Wear patterns on the chain that may indicate aworn bar or sprocket.• Loose rivets (if you can rotate the rivets wit
24Saw Chain2. To set the propergrinder head angle, use the recommendedttoopp--ppllaattee ccuuttttiinngg aannggllee(See pages 35-63 for correct angle
25Saw ChainSHARPENING WITH A ROUND FILE1. Be sure 1/5th, or 20%, of the file’s diameter is alwaysheld above the cutter’s top plate. The best way todo
Chainsaw SafetyWHAT IS KICKBACK?Kickback is the violent backward and/or upward motion of thechainsaw guide bar occurring when the chain near the nose
26Saw ChainHOW TO SET DEPTH GAUGES Set depth gauges often, every 3 or 4 sharpenings,or more often if needed. READ THE WARNING ON PAGE 17.Setting you
27Saw ChainHOW TO SET DEPTH GAUGES (CONTINUED)Most Oregon®chains have a number stamped oneach depth gauge indicating the correct depth-gaugesetting.EX
28Saw ChainHOW TO SET DEPTH GAUGES (CONTINUED)4. If the depth gauge extends above the slot, file thedepth gauge down level with the top of the toolusi
29Saw Chain**Do not round off the depth gauges on Vanguardchain after filing them down.On many chains, it may be helpful to tip thedepth-gauge tool on
30Saw Chain3. The area where depth-gauge filing occurs onVanguard chain is identified by a witness mark. Donot file outside the witness mark and do no
31Saw Chain3. Place the preset tie strap on a flat outer surface of achain-breaker anvil. Be surethe rivets are pointing up.4. Assemble chain to the p
32Saw ChainHOW TO BREAK OUT RIVETSCAUTION Always wear approved safety accessories for hands and face when breaking out rivets.1. Place the chain segm
33Saw ChainHOW TO BREAK OUT RIVETS (CONTINUED)REMOVING RIVETS FROM BROKEN DRIVE LINKS1. When removing rivets from broken drive links, holdthe two brok
34Saw ChainHOW TO BREAK IN A NEW CHAINThe life of your new chain can be extended by takingthese few simple steps before using it.▲1. Before the first
35Micro Chisel®1/4"Not a Low-kickback ChainMICRO CHISEL®Kickback End UseReducing ViewFeaturesFILING햲DEPTH-GAUGE 햳TOP-PLATE SETTING CUTTING ANGLE햴
Chainsaw Safety,(Continued)MAKE PROPER WORK PRACTICES A HABITCAUTION Keep yourself clear of the work. Before cutting:-Calculate how the object being
36Micro Chisel®.325"Not a Low-kickback ChainLow-vibrationChainMICRO CHISEL®Kickback End UseReducing ViewFeaturesFILING햲DEPTH-GAUGE 햳TOP-PLATE SET
37Super 20 .325"Not a Low-kickback ChainLow-vibrationChainCHISEL®Kickback End UseReducing ViewFeaturesFILING햲DEPTH-GAUGE 햳TOP-PLATE SETTING CUTTI
38Super Guard®.325"Not a Low-kickback ChainNo Bumper Tie StrapsLow-vibration ChainCHISEL®Kickback End UseReducing ViewFeaturesChain Type Gauge33L
39Pro Guard™.325"A Low-kickback ChainWith Bumper Tie StrapsLow-vibration ChainCHISEL®Kickback End UseReducing ViewFeaturesChain Type Gauge33SL .0
Kickback End UseReducing ViewFeatures40Micro-Lite™.325"A Low-kickback ChainLow-vibration ChainNarrow-kerf ChainMICRO CHISEL®Chain Type Gauge95VP
41Ripping Chain .325"End UseViewNot a Low-kickback ChainNarrow-kerf ChainLow-vibration ChainMICRO CHISEL®Chain Type Gauge95R (Micro-LiteTM) .050&
42Oregon®Vanguard 3/8"Kickback End UseReducing ViewFeaturesLow-kickback PerformanceLow-vibration ChainOREGON®VANGUARDChain Type Gauge72V .050&quo
Not a Low-kickback Chain43S-70 3/8"SEMI CHISELKickback End UseReducing ViewFeaturesChain Type Gauge72AP, 72DP .050"73DP .058"75DP .063&
44Speed Guard™3/8"*Recently obsoleted Oregon®chain part numbersNot a Low-kickback ChainSEMI CHISELKickback End UseReducing ViewFeaturesFILING햲DEP
45Super Guard®3/8"Not a Low-kickback ChainCHISELKickback End UseReducing ViewFeaturesFILING햲DEPTH-GAUGE 햳TOP-PLATE SETTING CUTTING ANGLE햴SIDE-PLA
Introduction/ContentsYour chainsaw is only as good as your chain, guide bar, and sprocket. They function as a team while cutting wood and must be main
46Super 70 3/8"Not a Low-kickback ChainLow-vibrationChainCHISELKickback End UseReducing ViewFeaturesChain Type Gauge72JP, 72LP, M72LP .050"7
47XtraGUARD®3/8"*Recently obsoleted Oregon®chain part numbersA Low-kickback ChainWith Bumper Tie StrapsSEMI CHISELKickback End UseReducing ViewFe
48Square-Ground Chain 3/8"Chain Type Gauge72CJ, 72CJX, 72CK, 72CKX, 72CL, 72CLX.050"75CJ, 75CJX, 75CK,75CKX, 75CL, 75CLX.063"Not a Low-
49Ripping Chain 3/8"Kickback End UseReducing ViewFeaturesNot a Low-kickback ChainSEMI CHISELChain Type Gauge72RD .050"73RD .058"75RD .0
50Micro-liteTM3/8"A Low-kickback ChainWith Bumper Tie StrapsLow-vibration ChainNarrow-kerf ChainCHAMFER CHISELKickback End UseReducing ViewFeatur
Kickback End UseReducing ViewFeatures51XtraGUARD®3/8"A Low-kickback ChainWith Bumper Drive LinksCHAMFER CHISELChain Type Gauge91P .050"FILIN
52Low Profile 3/8"Kickback End UseReducing ViewFeaturesNot a Low-kickback ChainNo Bumper Tie StrapsLow-vibration ChainCHAMFER CHISELChain Type Ga
53XtraGUARD®3/8"Kickback End UseReducing ViewFeaturesA Low-kickback ChainWith Bumper Tie StrapsLow-vibration ChainCHAMFER CHISELChain Type Gauge9
54Micro Chisel®.404"Kickback End UseReducing ViewFeatures26P, 27P26, 27, 27ANot a Low-kickback ChainMICRO CHISELChain Type Gauge26, 26P .058"
55Ripping Chain .404"End UseViewNot a Low-kickback ChainMICRO CHISELChain Type Gauge27R .063"27RA (skip) .063"FILING햲DEPTH-GAUGE 햳TOP-P
2Saw ChainThe Four Oregon®End-Use SymbolsEach of these four symbols represents a generalizedcategory of chain saw use. Oregon®chains are listed in thi
56Super Chisel™.404"Kickback End UseReducing ViewFeatures*Recently obsoleted Oregon®chain part numbersNot a Low-kickback ChainCHISELChain Type Ga
Kickback End UseReducing ViewFeatures57Micro-Bit®.404"*Recently obsoleted Oregon®chain part numbersNot a Low-kickback ChainCHIPPERChain Type Gaug
58Super Guard®.404"Kickback End UseReducing ViewFeatures*Recently obsoleted Oregon®chain part numbersNot a Low-kickback ChainCHISELChain Type Gau
59Square-Ground Chain .404"Kickback End UseReducing ViewFeatures*Recently obsoleted Oregon®chain part numbersNot a Low-kickback ChainCHISELChain
60Harvester Chain .404"For use on mechanized harvesting equipment only.Do not use on hand-held cutting applications as severe injury to operator
61Harvester Chain .404"For use on mechanized harvesting equipment only.Do not use on hand-held cutting applications as severe injury to operator
62Harvester Chain 3/4"For use on mechanized harvesting equipment only.Do not use on hand-held cutting applications as severe injury to operator o
63Harvester Chain 3/4"For use on mechanized harvesting equipment only.Do not use on hand-held cutting applications as severe injury to operator o
64Square-Ground FilingWHO SHOULD PERFORM SQUAREGROUND FILING?Most chainsaw users will probably never need to usesquare ground chain, nor learn to perf
65Square-Ground FilingFILE DIRECTIONOregon®recommends thatsquare-ground chain be filedfrom the outside in (in a down-ward direction). This leaves abet
3Saw ChainTo keep your cutting system of chain, bar, and sprocket working at peak efficiency - and to minimizewear - there are a number of things ever
66Square-Ground FilingGULLET FILINGApproximately every 5th sharpening, clean out gulletsby filing them back with a 7/32" round file. File gullets
67Saw ChainSAW CHAIN TROUBLESHOOTINGMost chain problems are caused by three things: incorrect chain tension, incorrect filing, and lack of lubrication
68Saw ChainSAW-CHAIN TROUBLESHOOTING (CONTINUED)Low depth gauges. High depth gauges. Square or blunt Remedy: See E. Remedy: See F. depth gauges.
69Saw ChainSAW-CHAIN TROUBLESHOOTING (CONTINUED)Excessive heel wear on Cracks under rear rivet Tie straps broken cutters and opposite holes on cut
70Saw ChainSAW-CHAIN TROUBLESHOOTING (CONTINUED)REMEDIES (CONTINUED)J. Dress the tops of the guide bar’s rails square. If wear isminor, file the botto
71Saw ChainSAW-CHAIN TROUBLESHOOTING (CONTINUED)REMEDIES: (K-P)K. Check your guide bar (grooves in bar’s body or nose have worn too shallow), and chec
72Saw ChainSAW-CHAIN TROUBLESHOOTING (CONTINUED)SHARPENING DRIVE-LINK TANGSPointed drive-link tangs help remove chips and debrisfrom your bar groove.
73Saw ChainSAW-CHAIN TROUBLESHOOTING (CONTINUED)REMEDIES: (Q-R)Q. Chain with tight joints cannot be repaired. Replacethe chain and maintain proper ten
Oregon®Bar TypePOWERMATCH®SYMMETRICALSPROCKET-NOSEBARRN= Symmetrical replaceable sprocket-noseGN=Symmetrical replaceable sprocket-nose with Guard Mate
BAResBARoseose ARepsp90 or 95)ARnd 3/8") 91)BarMountA218A318A041A061A064A074A095D009D176(Etc.)**T041**T061**T074**T095**T218**T31875Guide BarsNos
4Saw ChainOREGON®CHAIN TERMSCHAIN PITCHChain pitch is the distance between any three consecutive rivets, divided by two.Oregon®chain pitches are:1/4,&
76Guide BarsOREGON®GUIDE-BAR TERMSOREGON®GUIDE-BAR-MAINTENANCE TOOLSSPANNER WRENCH FLAT FILE WITH HANDLE*Asst’d. P/N’s File P/N 12211BAR RAIL DRESSER
77Guide BarsIMPORTANT INFORMATION ONOREGON®INTENZ®GUIDE BARSIntenz®bars are those which have our patented Intenz®chain-tensioning mechanism built righ
78Guide BarsOREGON®GUIDE-BAR MAINTENANCEATTENTION: Oregon®urges dealers, chainsaw users,and anyone who services guide bars to become familiarwith prop
79Guide BarsBASIC GUIDE-BAR MAINTENANCE (CONTINUED) Turn nose sprocket while pumping grease until wholesprocket has new grease. Do not push dirt into
80Guide BarsHOW TO REPLACE OREGON®POWER MATCH BAR NOSESSelect a new Power Match®nose with the correct pitch for your bar and chain.Reduced-kickback Do
81Guide BarsPOWER MATCH®BAR NOSES (CONTINUED)4. With the bar body, nose, and rivet solidly supportedon a strong flat metal surface, peen the Power Mat
82Guide BarsHOW TO REPLACE NOSE SPROCKETS ONPRO-LITE®, AND MICRO-LITE™ PRO BARSSelect a new nose sprocket with the correctpitch for your bar and chain
83Guide BarsPRO-LITE®/MICRO-LITE™PRONOSE SPROCKETS (CONTINUED)4. Once fully inside the nose, hold the sprocket in place, thenremove the tiss
84Guide BarsGUIDE-BAR TROUBLESHOOTINGMost guide bar problems occur in the bar rails, and are caused by four things: incorrect chain tension, lack of l
85Guide BarsGUIDE-BAR TROUBLESHOOTING (CONTINUED)3334Rails around the tip of solid-nose Rails along the bar body or bars are split at the bottom of
5Saw ChainOREGON®CHAIN TERMS (CONTINUED)THE PARTS OF A SAW CHAINParts below named in Bold Face indicate kick-back-reducing links and features: bumper
86Guide BarsGUIDE-BAR TROUBLESHOOTING (CONTINUED)REMEDIES: (T-Y)T. Shallow grooves and wire edges are the result of inadequate lubrication, improper t
87Guide BarsGUIDE-BAR TROUBLESHOOTING (CONTINUED)REMEDIES: (T-Y) (CONTINUED)X. Such wear or chipping near the nose often accompanies heavy limbing, bu
88Drive SprocketsOREGON®SPROCKET TERMSRIM SPROCKETSPUR SPROCKETClutchDrumClutchSkirt BoreDustCoverSpur TeethOREGON®SPROCKET-MAINTENANCE TOOLSGREASE GU
89Drive SprocketsOREGON®RIM SPROCKETS WITHWEAR-DEPTH INDICATORSThe free-floating rim is the component of a sprocketsystem which is replaceable.• Popul
90Drive SprocketsYour drive sprocket, the third member of the cuttingteam, deserves regular attention and maintenance justlike your bar and chain. A m
91Drive SprocketsBASIC SPROCKET-MAINTENANCE TASKS (CONTINUED)▲ ▲ Chain tension is especially important when thesaw is tipped on its side during fellin
92Drive SprocketsSPROCKET TROUBLESHOOTINGMost sprocket problems are caused by loose chain tension and failure to replace the sprocket or clutch drum w
93Drive SprocketsSPROCKET TROUBLESHOOTING (CONTINUED)4041Cracks or breakage on the clutch Obvious wear or discoloration drum. Remedy: See BB. aroun
94Saw ChainHOW A CUTTER WORKSUnderstanding how cutters work can help you see whyproper chain maintenance is so important.1. The depth gauge rides on t
95Saw ChainHOW TO ORDER REPLACEMENT CHAINFor the best possible service, have the following fouritems of information ready for your Oregon®dealer.1. Yo
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