3M 3x4 in. OS � Revision 022508

IntendedUse

ImportantSafetyInformation

Pleaseread,understandandfollowallsafetyinformationcontainedintheseinstructionspriortotheuseofthistool.Retaintheseinstructionsforfuturereference.

Thispneumatictoolisdesignedtobeusedwithabackuppadandappropriateabrasiveforsandingmetals,wood,stone,plasticsandothermaterials.Itshouldonlybeusedforsuchsandingapplicationsandwithinitsmarkedcapacityandratings.Onlyaccessoriesspecificallyrecommendedby3Mshouldbeusedwiththistool.Useinanyothermannerorwithotheraccessoriescouldleadtounsafeoperatingconditions.

Donotoperatetoolinwaterorinanexcessivelywetapplication.

Donotuseback-uppadsthathaveaMaxRPMorMaxOPMlessthan�0,000.Neveruseback-uppadsthathaveaweightand/orsizedifferentthanwhatthetoolwasspecificallydesignedfor.

Toreducetheriskofallhazardsassociatedwiththisproduct:• Read,understandandfollowthesafetyinformationcontainedintheseinstructionspriortotheuseofthistool.• Onlypersonnelwhoareproperlytrainedshouldbeallowedtoservicethistool.• Alwayswearprotectionforeyes,earsandrespiratoryprotectionwhileoperatingthisproduct.FollowANSIZ87.�or

local/nationalstandardsforeyewearandotherpersonalprotectiveequipmentrequirements.• Practicesafetyrequirements.Workalert,wearproperattire;neveroperatetoolsundertheinfluenceofalcoholordrugsorina

mannerinconsistentwithitsintendeduse.Toreducetherisksassociatedwithaccessoryruptureordisintegration:• Neverexceedmarkedmaximuminputpressure(90psi/.62Mpa/6.2Bars).• Usecareinattachingback-uppad;followtheinstructionstoensurethatitissecurelyattachedtothetoolbeforeuse.• Neverfreespinthetoolorotherwiseallowittobestartedunintentionally.• Neverpointthisproductinthedirectionofyourselforanotherperson.Toreducetheriskassociatedwithloudnoise:• Immediatelydiscontinueuseofproductifitsnoisereductionmufflersystemhasbeendamagedorisotherwisenotfunctioning

properly.Haveproductrepairedbeforeplacingbackintouse.Toreducetheriskassociatedwithvibrationemissionsduringuseofproduct:• Ifanyphysicalhand/wristdiscomfortisexperienced,stopworkpromptlyandseekmedicalattention.Hand,wristandarminjury

mayresultfromrepetitivework,motionandoverexposuretovibration.Toreducetheriskassociatedwithelectricalshockand/orexplosion:• Donotallowthistooltocontactelectricalpowersourcesasthetoolisnotinsulatedagainstelectricalshock.• Donotoperatethetoolinornearexplosivematerials,suchasflammableliquids,gasesorexcessiveairbornedust.Thetool/

abrasivescancreatesparkswhenworkingmaterial,resultingintheignitionoftheflammabledustorfumes.

WARNING

ExplanationofSignalWordConsequencesIndicatesapotentiallyhazardoussituationwhich,ifnotavoided,mayresultindeathorseriousinjuryand/orpropertydamage.Indicatesapotentiallyhazardoussituationwhich,ifnotavoided,mayresultinminorormoderateinjuryand/orpropertydamage.

WARNING:

CAUTION:

ORBITAL SANDERS MANUAL10,000 OPM 75 x 100 mm (3 in x 4 in)

3M 3x4 in. OS 2 Revision 022508

CAUTION!

PartsPage

ITEM TORQUE SETTINGNm (in.-lbs.)

12 6.2 - 7.3 (55 - 65)31 2.2 - 2.8 (20 - 25)40 2.8 - 3.4 (25 - 30)42 2.8 - 3.4 (25 - 30)43 10.7 - 11.8 (95 - 105)48 1.8 - 2.3 (16 - 20)52 6.8 - 8.1 (60 -72)56 4.0 - 5.4 (36 - 48)68 3.4 - 3.9 (30 - 35)

1

2

3

4

7

5

6

8

9

10

11

12

13

1415

1617

18 19

20 21

22 23

24

27

28

29

3031

32

33

34

39

40

41

4243

44

35

36

37

38

46

4748

5251

50

4953

54

55

56

57

58

59

61

60

62

63

69

6665

64

67

68

45

25

26

TOINLET

TOINLET

TO VACUUMSYSTEM FOR

CENTRAL VAC

70

71

72

Toreducetheriskassociatedwithpneumaticpressureandothermechanicalhazards:• Keephands,hairandclothingawayfromtheworkingendofthetool.• Donottouchtherotatingpartsduringoperationforanyreason.• Replacebackuppadatnormalintervalsaccordingtoinstructions.• Neveroperatethistoolwithoutallguardsorsafetyfeaturesinplaceandinproperworkingorder.• Beawarethatincorrectlyinstalledhosesandfittingsmightunexpectedlycomelooseatanytimeandcreateawhipping/impacthazard.• Ifyounoticeanyabnormalnoiseorvibrationwhenoperatingtheproduct,immediatelydiscontinueitsuseandinspectforworn

ordamagedbackuppad.Replaceanydamagedparts.Ifabnormalnoiseorvibrationstillexistsreturntothemanufacturerforserviceorrepair.Refertowarrantyinstructions.

3M 3x4 in. OS 3 Revision 022508

PartsListIT P/N DESCRIPTION QTY1 3MA0040 EXTERNAL RETAINING RING 12 3MA0021 BEARING - 2 SHIELDS 13 3MB0017 REAR ENDPLATE 14 3MA0005 CYLINDER ASSEMBLY 15 3MA0042 O-RING 16 3MB0005 ROTOR 17 3MA0010 VANE 58 3MA0041 WOODRUFF KEY 19 3MB0016 FRONT ENDPLATE 1

10 3MA0019 BEARING - 2 SHIELDS 111 3MA0045 O-RING 112 3MA0001 LOCK RING 113 3MB0102 SHAFT BALANCER 114 3MA0122 FILTER 115 3MA0121 CHECK VALVE 116 3MA0120 VALVE RETAINER 117 3MA0107 RETAINING RING 118 3MA0162 BEARING - NO SEAL/SHIELDS 119 3MA0196 SPACER 120 3MA0161 BEARING - 1 SEAL 121 3MA0108 SHIM 0.2 THK 122 3MA0126 BELLEVILLE WASHER 123 3MA0177 RETAINING RING 124 3MA0163 SPINDLE ASSEMBLY 125 3MA0080 SPACER 0.4 THK 126 3MA0079 SPACER 0.2 THK OPT27 3MA1353 LEVER 128 3MA0031 LEVER SPRING PIN 1

293MB0320 GRIP 2.5 in. OPT-20331, 20430, 20431, 01813, 01814 -3MB0321 GRIP 2 3/4 in. OPT-01813, 01814 -3MB0322 GRIP 3 in. OPT-20331, 20430, 20431 -

30 3MA0015 VALVE SLEEVE 131 3MA0768 SCREW 432 3MA0076 WASHER 433 3MA1331 HOUSING 134 3MA1356 SHROUD SEAL 135 3MA0008 VALVE STEM ASSEMBLY 136 3MA0043 O-RING 137 3MB0014 SPEED CONTROL 138 3MA0039 INTERNAL RETAINING RING 139 3MC0018 MINI PAD SUPPORT ASSEMBLY 240 3MA0766 SCREW 441 3MA1357 PAD BACKING FOR SCREW-ON PADS 142 3MA0767 SCREW 443 3MA0078 SCREW 144 NA 1 PAD SUPPLIED WITH EACH TOOL (TYPE DETERMINED BY MODEL) 145 3MA0864 2.5 mm HEX WRENCH 146 3MA0032 MUFFLER INSERT 247 3MA0038 MUFFLER PLATE 148 3MA0166 MUFFLER HOUSING 149 3MA0009 VALVE SEAT 150 3MA0007 VALVE 151 3MA0014 VALVE SPRING 152 3MA0013 INLET BUSHING ASSEMBLY 153 3MA1349 SNAP-IN VACUUM COVER PLATE 154 3MA1350 SNAP-IN EXHAUST ADAPTER 155 3MA0044 O-RING 256 3MA0722 SGV RETAINER 157 3MA1338 ASSEMBLY FOR 1 in./28 mm HOSE SGV SWIVEL EXHAUST FITTING 158 3MA1340 ASSEMBLY FOR 3/4 in./19 mm HOSE SGV SWIVEL EXHAUST FITTING OPT59 3MA0778 1 in./28 mm HOSE SEAL 160 3MA0854 3/4 in./19 mm HOSE SEAL OPT61 3MA1354 TAG W/ INSTRUCTION 1 in./28 mm HOSE SEAL 161 3MA1355 TAG W/ INSTRUCTION 3/4 in./19 mm HOSE SEAL OPT62 3MA1488 ASSY FOR Ø 1 in. VAC HOSE TO DOUBLE BAG FITTING AND AIRLINE OPT62 3MA1487 ASSY FOR Ø 3/4 in. VAC HOSE TO DOUBLE BAG FITTING AND AIRLINE OPT63 3MA1490 ASSY FOR Ø 1 in. VAC HOSE TO Ø 1 in./28 mm x 1 1/2 in. FRICTION FIT ADAPTER COUPLING AND AIRLINE 163 3MA1489 ASSY FOR Ø 3/4 in. VAC HOSE TO Ø 3/4 in. x 1 in./28 mm ADAPTER COUPLING AND AIRLINE OPT64 3MA0048 FLANGED NUT 165 3MA1359 ASSEMBLY FOR 3/4 in. OS CV SWIVEL EXHAUST OPT66 3MA1360 ASSEMBLY FOR 1 in./28 mm OS CV SWIVEL EXHAUST 167 3MA0047 WASHER 168 3MA0769 SCREW 169 3MA1434 VACUUM BAG OPT70 3MC0109 VACUUM BAG INSERT OPT71 3MA1668 3M™ CLEAN SANDING FILTER BAG (20452-3M reorder number) 172 3MA1669 3M™ FILTER BAG ADAPTOR (20453-3M reorder number) 1

3M 3x4 in. OS � Revision 022508

ProductConfiguration/Specifications:�0,000OPMOrbitalSander

OperatingInstructions

PRIORTOTHEOPERATIONThetoolisintendedtobeoperatedasahandheldtool.Itisalwaysrecommendedthatwhileusingthetooloperatorsstandonasolidfloorinasecurepositionwithafirmgripandfooting.Beawarethatthesandercandevelopatorquereaction.Seethesection“SAFETYPRECAUTIONS”.

Useacleanlubricatedairsupplythatwillgiveameasuredairpressureatthetoolof6.2bar(90psig)whenthetoolisrunningwiththeleverfullydepressed.Itisrecommendedtouseanapproved�0mm(3/8in)x8m(25ft)maximumlengthairline.ConnectthetooltotheairsupplyasshowninFigure�.Donotconnectthetooltotheairlinesystemwithoutaneasilyaccessibleairshutoffvalve.Itisstronglyrecommendedthatanairfilterregulatorandlubricator(FRL)beused,asshowninFigure�,asthiswillsupplycleanlubricatedairatthecorrectpressuretothetool.Inanycaseappropriateairpressureregulatorsshallbeusedatalltimeswhileoperatingthistoolwherethesupplypressureexceedsthemarkedmaximumofthetool.Detailsofsuchequipmentcanbeobtainedforyourtooldistribu-tor.Ifsuchequipmentisnotusedthetoolshouldbemanuallylubricated.Tomanuallylubricatethetooldisconnecttheairlineandput2to3dropsofsuitablepneumaticmotorlubricatingoilsuchas3M™AirToolLubricantPN20�5�,FujiKosanFK-20orMobilALMO525intothehoseend(inlet)ofthetool.Reconnecttooltotheairsupplyandruntoolslowlyforafewsecondstoallowairtocirculatetheoil.Ifthetoolisusedfrequently,lubricateitonadailybasisorlubricateitifthetoolstartstosloworlosepower.Itisrecommendedthattheairpressureatthetoolbe6.2bar(90psig)whilethetoolisrunningsothemaximumRPMisnotexceeded.Thetoolcanberunatlowerpressuresbutshouldneverberunhigherthan6.2bar(90psig).Ifrunatlowerpressuretheperformanceofthetoolisreduced.

RecommendedAirline RecommendedMaximum AirPressure Size-Minimum HoseLength

�0mm 3/8in 8meters 25feet MaximumWorkingPressure6.2bar90psig RecommendedMinimum

SafetyPrecautions

�. Readallinstructionsbeforeusingthistool.Alloperatorsmustbefullytrainedinitsuseandawareofthesesafetyrules.2. Makesurethetoolisdisconnectedfromtheairsupply.Selectasuitableabrasiveandsecureittotheback-uppad.Becarefulto

centertheabrasiveontheback-uppad.3. Alwayswearrequiredsafetyequipmentwhenusingthistool.�. Whensandingalwaysstartthetoolontheworkpiece.

Thiswillpreventgougingduetoexcessspeedoftheabrasive.Stopairflowtothetoolasitisremovedfromtheworkpiece.5. Alwaysremovetheairsupplytothesanderbeforefitting,adjustingorremovingtheabrasiveorback-uppad.6. Alwaysadoptafirmfootingandgripandbeawareoftorquereactiondevelopedbythesander.7. Useonly3Mapprovedspareparts.8. Alwaysensurethematerialbeingsandedisfirmlyfixedtoavoidmovement.

*Declarednoiselevels;measurementscarriedoutinaccordancewithstandardENISO�57��:2002.**DeclaredvibrationlevelsinaccordancewithEN�2096;measurementscarriedoutinaccordancewithstandardENISO8662-8:�997.Thenoiseandvibrationvaluesstatedinthetablearefromlaboratorytestinginconformitywithstatedcodesandstandardsandarenotsufficientriskevaluation.Valuesmeasuredinaparticularworkplacemaybehigherthanthedeclaredvalues.Theactualexposurevaluesandamountofriskorharmexperiencedtoanindividualisuniquetoeachsituationanddependsuponthesurroundingenviron-ment,thewayinwhichtheindividualworks,theparticularmaterialbeingworked,workstationdesign,aswellasupontheexposuretimeandthephysicalconditionoftheuser.3Mcannotbeheldresponsiblefortheconsequencesofusingdeclaredvaluesinsteadofactualexposurevaluesforanyindividualriskassessment.

Note: All Vacuum machines use Ø 28 mm (1 in.) Vacuum Hose Fittings

Orbit Pad Face

Vacuum Type Pad Type Model Number. Pad Part

NumberProduct Net

Weight kg (lb)

Height mm (in.)

Length mm (in.)

*Noise Level dBA Pressure

(Power)

**Vibration Level m/s2

(ft/s2)

**Uncertainty K

m/s2

3 mm (1/8 in.)

Hookit™

Non-Vacuum

Standard

20331 20433 0.65 (1.43) 83.5 (3.28)

139.3 (5.48) 73 (81) 3.0 (9.84) 1.5

Central Vacuum 20430 20435 0.69 (1.53) 83.5

(3.28)139.3 (5.48) 72 (82) 3.0 (9.84) 1.5

Self-Gen.

Vacuum20431 20435 0.72 (1.58) 83.5

(3.28)142.3 (5.60) 85 (92) 3.0 (9.84) 1.5

Central Vacuum 01814 20242 0.69 (1.53) 83.5

(3.28)139.3 (5.48) 72 (82) 3.0 (9.84) 1.5

Self-Gen.

Vacuum01813 20242 0.72 (1.58) 83.5

(3.28)142.3 (5.60) 85 (92) 3.0 (9.84) 1.5

3M 3x4 in. OS 5 Revision 022508

Description PartNumber

75x�00mm(3x�in.)Hookit™Padnon-vacuum 20�33

75x�00mm(3x�in.)Hookit™CleanSanding

Padvacuum

20�35

75x�00mm(3x�in.)Hookit™DustFreePad

vacuumEurope

202�2

3M™Back-UpPads

3Mback-uppadsareperfectlymatedforuseonthe3MSander.Constructedfrompremium,industrial-qualitymaterialswithmoldedurethane.Theirdurabilityandpreciseconstructionaretheidealcomplementtotheperformanceofthe3MSander.SeeProductConfiguration/Specificationstableforthecorrectreplacementpadforaparticularmodel.Thefollowingchartisasampleofproductsoffered.

Figure�

Closed Loop Pipe SystemSloped in the direction of air flow

Drain Leg

Ball Valve

To Tool Station

Filter

Drain Valve

Regulator

Lubricator

BallValve

Ball Valve Air Flow

Air Dryer

Air Compressorand Tank

Air Hose

To Couplerat or near Tool

RemovingandMountingBack-upPadtoOrbitalSander

�. Disconnectairlinefromsander.2. Removeoldback-uppadfromsanderbyremovingthe�screws

withthewrenchsuppliedwiththetool.3. Positionthenewbackuppadtoalignthescrewswiththe

threadedholesandtightensecurely.

9. Checkhoseandfittingsregularlyforwear.Donotcarrythetoolbyitshose;alwaysbecarefultopreventthetoolfrombeingstartedwhencarryingthetoolwiththeairsupplyconnected.

�0.Dustcanbehighlycombustible.Vacuumdustcollectionbagshouldbecleanedorreplacedasneeded.Cleaningorreplacingofbagalsoassuresoptimumperformance.

��.Donotexceedmaximumrecommendedairpressure.Usesafetyequipmentasrecommended.

�2.Thetoolisnotelectricallyinsulated.Donotusewherethereisapossibilityofcontactwithliveelectricity,gaspipesand/orwaterpipes.

�3.Thistoolisnotprotectedagainsthazardsinherentingrindingandcuttingoperations,andnosuchacces-soriesshouldeverbeattached.

��.Takecaretoavoidentanglementwiththemovingpartsofthetoolwithclothing,ties,hair,cleaningragsorloosehangingobjects.Ifentangled,stopairsupplyimmedi-atelytoavoidcontactwithmovingtoolparts.

�5.Ifthetoolappearstomalfunctionremovefromuseimmediatelyandarrangeforserviceandrepair.

�6.Immediatelyreleasethestarthandleintheeventofanydisruptionofpressure;donotattempttore-startuntilthedisruptionhasbeencorrected.

3M 3x4 in. OS 6 Revision 022508

Abrasive Systems Division3MCenterBuilding223-6N-02St.PaulMN55���-�000www.3M.com/abrasives

Product Use: Allstatements,technicalinformationandrecommendationscontainedinthisdocumentarebasedupontestsorexperiencethat3Mbelievesarereliable.However,manyfactorsbeyond3M’scontrolcanaffecttheuseandperformanceofa3Mproductinaparticularapplica-tion,includingtheconditionsunderwhichthe3Mproductisusedandthetimeandenvironmentalconditionsinwhichtheproductisexpectedtoperform.Sincethesefactorsareuniquelywithintheuser’sknowledgeandcontrol,itisessentialthattheuserevaluatethe3Mproducttodeterminewhetheritisfitforaparticularpurposeandsuitablefortheuser’smethodofapplication.Warranty and Limited Remedy: 3Mwarrantsthistoolagainstdefectsinworkmanshipandmaterialsundernormaloperatingconditionsforone(�)yearfromthedateofpur-chase.3MMAKESNOOTHERWARRANTIES,EXPRESSORIMPLIED,INCLUDING,BUTNOTLIMITEDTO,ANYIMPLIEDWARRANTYOFMERCHANTABILITYORFIT-NESSFORAPARTICULARPURPOSEORANYIMPLIEDWARRANTYARISINGOUTOFACOURSEOFDEALING,CUSTOMORUSAGEOFTRADE.Userisresponsiblefordeterminingwhetherthe3Mtoolisfitforaparticularpurposeandsuitableforuser’sapplication.Usermustoperatethetoolinaccordancewithallapplicableoperating

instructions,safetyprecautions,andotherproceduresstatedintheoperatingmanualtobeentitledtowarrantycoverage.3Mshallhavenoobligationtorepairorreplaceanytoolorpartthatfailsduetonormalwear,inadequateorimpropermaintenance,inadequatecleaning,non-lubrication,improperoperatingenvironment,improperutilities,operatorerrorormisuse,alterationormodification,mishan-dling,lackofreasonablecare,orduetoanyaccidentalcause.Ifatooloranypartthereofisdefectivewithinthiswarrantyperiod,yourexclusiveremedyand3M’ssoleobligationwillbe,at3M’soption,torepairorreplacethetoolorrefundthepurchaseprice.Limitation of Liability:Exceptwhereprohibitedbylaw,3Mandsellerwillnotbeliableforanylossordamagearisingfromthe3Mproduct,whetherdirect,indirect,special,incidentalorconsequen-tial,regardlessofthelegaltheoryasserted,includingwarranty,contract,negligenceorstrictliability.Submitting a Warranty Claim:Contactyourdealerwhensubmittingawarrantyclaiminaccordancewiththerestrictionslistedabove.Pleasenotethatallwarrantyclaimsaresubjecttomanufacturer’sapproval.Besuretokeepyoursalesreceiptinasafeplace.Thismustbesubmittedwhenfilingawarrantyclaim,within�yearfromthedateofpurchase.Product Repair after Warranty Has Expired3Mdoesnotofferrepairserviceforproductoutofwarranty.

©3M20083MStikitandHookitaretrademarksof3MCompany.3�-8700-3708-�