Graco 25C539 Parts list manual

Instructions/Parts
Stainless Stainless
StainlessSteel, Steel, Steel,Air Air Air- - -Driven Driven DrivenAgitators Agitators Agitators
with with
withPressure Pressure PressureTank Tank Tank3A4797F
EN
Radial Radial
Radialpiston piston pistonair air airdriven driven drivenagitators agitators agitatorsfor for formaintaining maintaining maintainingsuspension suspension suspensionand and andeven even even- - -mixing mixing mixingin in inindustrial industrial industrialpaints paints paintsand and and
coatings. coatings.
coatings.For For Forprofessional professional professionaluse use useonly. only. only.
Important Important
ImportantSafety Safety SafetyInstructions Instructions Instructions
Readallwarningsandinstructionsinthismanualbeforeusingthe
equipment.Save Save
Savethese these theseinstructions. instructions. instructions.
PressureTank—100psig(0.7MPa,7
bar)MaximumWorkingPressure
Agitator—70psig(0.5MPa,5bar)
MaximumRecommendedOperating
Pressure
Seepage2formodelpartnumbersand
approvalsinformation.
PROVENQUALITY.LEADINGTECHNOLOGY.

Contents Contents
Contents
RelatedManuals................................................2
Models...............................................................3
Warnings...........................................................4
Installation..........................................................6
TypicalSystem............................................6
AirRegulatorandMuf󰘱ers............................7
Agitator.......................................................9
Grounding...................................................11
ConnectingHoses........................................11
AirLineFilter...............................................11
Operation...........................................................12
PreparingtheFluid.......................................12
FillingtheTank............................................12
OperatingtheAgitator..................................12
PressureReliefProcedure............................13
SafetyReliefValve.......................................13
Maintenance......................................................14
GreasingtheAirMotor.................................14
AirMotorMuf󰘱er..........................................14
CleaningtheShaft.......................................14
CleaningtheTank........................................15
Service..............................................................16
RemovingtheAirMotor................................16
InstallingtheAirMotor..................................16
ServicingtheAgitatorShaftand
Couplings.......................................17
InstallingMotorConversionKits....................18
Parts..................................................................19
AllModels...................................................19
TankPartsforModels25C536,25C537,
25C538..........................................21
Accessories........................................................23
Strainer240418...........................................23
Buna-NAirSupplyHose...............................23
Low-PressureRegulatorConversionKit
235041..........................................23
High-PressureRegulatorConversionKit
236680..........................................23
AirRegulatorandFilter202660.....................23
GunAirRegulatorKit235042.......................23
PTFECoatedGasket117574.......................23
NylonFluidSupplyHose..............................23
BottomOutletKit236677..............................23
HeavyDutyAgitator.....................................23
C-clampReplacementKit111381.................23
AntistaticPolyethyleneTankLiners...............23
StainlessSteelAgitatorPaddle
186517..........................................23
DataTrakKit25P394....................................23
Dimensions........................................................24
AirConsumption.................................................26
TechnicalSpeci󰘰cations......................................27
CaliforniaProposition65.....................................27
Related Related
RelatedManuals Manuals Manuals
Manual Manual
Manualin in in
English English
English
Description Description
Description
3A4792Air-DrivenAgitators
3A4800Twistork®HelixAgitator
3A5050AgitatorAirMotorRebuildKits
23A4797F

Models
Models Models
Models
Agitators Agitators
Agitatorswith with withPressure Pressure PressureTank Tank Tank
Part Part
PartNo. No. No.Description Description DescriptionApprovals Approvals Approvals
25C536AgitatorwithPressureTank
5Gallon
25C537AgitatorwithPressureTank
10Gallon
25C538AgitatorwithPressureTank
15Gallon
ASME ASME
ASME
2575 2575
2575
II II
II1/2 1/2 1/2G G G
Ex Ex
Exh h hIIB IIB IIBT4 T4 T4Ga/Gb Ga/Gb Ga/Gb
IECEx IECEx
IECExETL ETL ETL17.0019 17.0019 17.0019
ITS17ATEX1001809 ITS17ATEX1001809
ITS17ATEX1001809
0 0
0°C C C≤Tamb Tamb Tamb≤50 50 50°C C C
Agitators Agitators
Agitatorswithout without withoutPressure Pressure PressureTank Tank Tank
Part Part
PartNo. No. No.Description Description DescriptionApprovals Approvals Approvals
25C539Agitator
(tobeusedwitha5gallontank)
25C540Agitator
(tobeusedwitha10gallontank)
25C541Agitator
(tobeusedwitha15gallontank)
2575 2575
2575
II II
II1/2 1/2 1/2G G G
Ex Ex
Exh h hIIB IIB IIBT4 T4 T4Ga/Gb Ga/Gb Ga/Gb
IECEx IECEx
IECExETL ETL ETL17.0019 17.0019 17.0019
ITS17ATEX1001809 ITS17ATEX1001809
ITS17ATEX1001809
0 0
0°C C C≤Tamb Tamb Tamb≤50 50 50°C C C
Motor Motor
MotorConversion Conversion ConversionKit Kit Kit
Part Part
PartNo. No. No.Description Description DescriptionApprovals Approvals Approvals
19A844Tocovertarotaryvaneairmotor
gear-reduceddriveunitwitha
radialpistonairmotor(directdrive).
26B168Tocoverta3rdpartyrotaryvane
airmotorgear-reduceddriveunit
witharadialpistonairmotor(direct
drive).
ConvertsthefollowingBinkstank
models:183x–2_3,183x–5_3,
183x–10_3,and183x–15_3.
•xinthemodelnumberisGorS.
•_inthemodelnumberis1,2,3,
or4.
II II
II2 2 2G G GEx Ex Exh h hIIB IIB IIBT4 T4 T4Gb Gb Gb
3A4797F3

Warnings
Warnings Warnings
Warnings
Thefollowingwarningsareforthesetup,use,grounding,maintenance,andrepairofthisequipment.The
exclamationpointsymbolalertsyoutoageneralwarningandthehazardsymbolsrefertoprocedure-speci󰘰c
risks.Whenthesesymbolsappearinthebodyofthismanual,referbacktotheseWarnings.Product-speci󰘰c
hazardsymbolsandwarningsnotcoveredinthissectionmayappearthroughoutthebodyofthismanual
whereapplicable.
WARNING WARNING
WARNING
FIRE FIRE
FIREAND AND ANDEXPLOSION EXPLOSION EXPLOSIONHAZARD HAZARD HAZARD
Flammablefumes,suchassolventandpaintfumes,inwork work
workarea area areacanigniteorexplode.Paint
orsolvent󰘱owingthroughtheequipmentcancausestaticsparking.Tohelpprevent󰘰reand
explosion:
•Useequipmentonlyinwellventilatedarea.
•Eliminateallignitionsources;suchaspilotlights,cigarettes,portableelectriclamps,and
plasticdropcloths(potentialstaticarc).
•Groundallequipmentintheworkarea.SeeGrounding Grounding
Groundinginstructions.
•Neversprayor󰘱ushsolventathighpressure.
•Keepworkareafreeofdebris,includingsolvent,ragsandgasoline.
•Donotplugorunplugpowercords,orturnpowerorlightswitchesonoroffwhen󰘱ammable
fumesarepresent.
•Useonlygroundedhoses.
•Holdgun󰘰rmlytosideofgroundedpailwhentriggeringintopail.Donotusepaillinersunless
theyareantistaticorconductive.
•Stop Stop
Stopoperation operation operationimmediately immediately immediatelyifstaticsparkingoccursoryoufeelashock,Donotuse
equipmentuntilyouidentifyandcorrecttheproblem.
•Keepaworking󰘰reextinguisherintheworkarea.
MOVING MOVING
MOVINGPARTS PARTS PARTSHAZARD HAZARD HAZARD
Movingpartscanpinch,cut,oramputate󰘰ngersandotherbodyparts.
•Keepclearofmovingparts.
•Donotoperateequipmentwithprotectiveguardsorcoversremoved.
•Donotwearlooseclothing,jewelry,orlonghairwhileoperatingequipment.
•Equipmentcanstartwithoutwarning.Beforechecking,moving,orservicingequipment,
followthePressure Pressure
PressureRelief Relief ReliefProcedure Procedure Procedureanddisconnectallpowersources.
PRESSURIZED PRESSURIZED
PRESSURIZEDEQUIPMENT EQUIPMENT EQUIPMENTHAZARD HAZARD HAZARD
Fluidfromtheequipment,leaks,orrupturedcomponentscansplashintheeyesoronskin
andcauseseriousinjury.
•FollowthePressure Pressure
PressureRelief Relief ReliefProcedure Procedure Procedurewhenyoustopspraying/dispensingandbefore
cleaning,checking,orservicingequipment.
•Tightenall󰘱uidconnectionsbeforeoperatingtheequipment.
•Checkhoses,tubes,andcouplingsdaily.Replacewornordamagedpartsimmediately.
43A4797F

Warnings
WARNING WARNING
WARNING
EQUIPMENT EQUIPMENT
EQUIPMENTMISUSE MISUSE MISUSEHAZARD HAZARD HAZARD
Misusecancausedeathorseriousinjury.
•Donotoperatetheunitwhenfatiguedorunderthein󰘱uenceofdrugsoralcohol.
•Donotexceedthemaximumworkingpressureortemperatureratingofthelowestrated
systemcomponent.SeeTechnical Technical
TechnicalSpeci󰘰cations Speci󰘰cations Speci󰘰cationsinallequipmentmanuals.
•Use󰘱uidsandsolventsthatarecompatiblewithequipmentwettedparts.SeeTechnical Technical
Technical
Speci󰘰cations Speci󰘰cations
Speci󰘰cationsinallequipmentmanuals.Read󰘱uidandsolventmanufacturer’swarnings.
Forcompleteinformationaboutyourmaterial,requestSDSfromdistributororretailer.
•Donotleavetheworkareawhileequipmentisenergizedorunderpressure.
•TurnoffallequipmentandfollowthePressure Pressure
PressureRelief Relief ReliefProcedure Procedure Procedurewhenequipmentisnotinuse.
•Checkequipmentdaily.Repairorreplacewornordamagedpartsimmediatelywithgenuine
manufacturer’sreplacementpartsonly.
•Donotalterormodifyequipment.Alterationsormodi󰘰cationsmayvoidagencyapprovals
andcreatesafetyhazards.
•Makesureallequipmentisratedandapprovedfortheenvironmentinwhichyouareusingit.
•Useequipmentonlyforitsintendedpurpose.Callyourdistributorforinformation.
•Routehosesandcablesawayfromtraf󰘰careas,sharpedges,movingparts,andhotsurfaces.
•Donotkinkoroverbendhosesorusehosestopullequipment.
•Keepchildrenandanimalsawayfromworkarea.
•Complywithallapplicablesafetyregulations.
TOXIC TOXIC
TOXICFLUID FLUID FLUIDOR OR ORFUMES FUMES FUMESHAZARD HAZARD HAZARD
Toxic󰘱uidsorfumescancauseseriousinjuryordeathifsplashedintheeyesoronskin,
inhaled,orswallowed.
•ReadSafetyDataSheet(SDS)toknowthespeci󰘰chazardsofthe󰘱uidsyouareusing.
•Storehazardous󰘱uidinapprovedcontainers,anddisposeofitaccordingtoapplicable
guidelines.
BURN BURN
BURNHAZARD HAZARD HAZARD
Equipmentsurfacesand󰘱uidthatisheatedcanbecomeveryhotduringoperation.Toavoid
severeburns:
•Donottouchhot󰘱uidorequipment.
PERSONAL PERSONAL
PERSONALPROTECTIVE PROTECTIVE PROTECTIVEEQUIPMENT EQUIPMENT EQUIPMENT
Wearappropriateprotectiveequipmentwhenintheworkareatohelppreventseriousinjury,
includingeyeinjury,hearingloss,inhalationoftoxicfumes,andburns.Protectiveequipment
includesbutisnotlimitedto:
•Protectiveeyewear,andhearingprotection.
•Respirators,protectiveclothing,andglovesasrecommendedbythe󰘱uidandsolvent
manufacturer.
3A4797F5

Installation
Installation Installation
Installation
Typical Typical
TypicalSystem System System
Besurethatallaccessoriesareproperlyratedtowithstandthepressuresinthesystem.
Note
Throughoutthemanual,referencenumbersandlettersinparenthesesrefertonumbersandlettersin
󰘰guresandthepartsdrawings.
Reference Reference
ReferenceSold Sold SoldSeparately Separately Separately- - -Description Description DescriptionReference Reference ReferenceIncluded Included
Included- - -Description Description Description
SHAirsupplyhoseTHTankAirInletHose
SVAirShutoffvalveRVSafetyreliefvalve(farside)
GCWGroundclampandwireBVAirinletballvalve
AHAtomizingairhoseFVFluidoutletballvalve
FHFluidhoseTRTankairregulator
AGAirspraygunAMAirmotor
AFAirinlet󰘰lterARMotorairregulator
TTankAAAgitatorairinlethose
63A4797F

Installation
Air Air
AirRegulator Regulator Regulatorand and andMuf󰘱ers Muf󰘱ers Muf󰘱ers
Theairmotoriscapableofoperatinginaclockwise
orcounterclockwisedirection,dependingonwhere
theairregulatorismounted.Clockwisedirectionis
preferredforthisbladeorientation
•Whentheairregulatorisinstalledinoneofthe
twolowerportsonthemotor,aclockwiserotation
results,asviewedfromthetopofthemotor.
•Wheninstalledoneithersideinoneofthetwo
upperports,acounterclockwiserotationresults.
•Theportoppositetheregulatormustbeplugged
forthemotortooperate.
Theairregulator,muf󰘱ers,airgauge,nipple
connector,andswivelconnectorarenotfactory
installedonmodels25C539,25C540,and25C541.
Followthedirectionsbelowtoinstalltheseitems:
1.Screwtheswivelconnector(F)(seebelow)into
thedesiredport(upperorlower)inthemotor(K).
2.Screwthenippleconnector(G)intotheair
regulator(H)outlet.Notearrowdirectionson
theregulator.
3.Attachtheairregulatorbyscrewingitintothe
swivelconnector.
4.Installaplug(E)intheportoppositetheregulator
(thisisnecessaryformotoroperation).
5.Attachtheairgauge(J)byscrewingitintothe
holeinthetopoftheairregulator.
6.Installaplug(E)intheregulatorintheport
oppositetheairgauge.
7.Screwonemuf󰘱er(D)intothetopofthemotor.
8.Screwthesecondmuf󰘱erintotheopenporton
thefarsideofthemotorfromtheregulator.
9.Installthethirdmuf󰘱erintheopenportabove
orbelowtheregulator.Anadditional󰘰ttingmay
beneeded(notprovided)tospacetheregulator
fartherawayfromthemotor.
Note
Useofthethirdmuf󰘱erisnotnecessary,
butisbene󰘰cialforincreasedair
circulationinhumidconditions.Ifathird
muf󰘱erisnotused,theholemustbe
plugged(E).
3A4797F7

Installation
Clockwise Clockwise
ClockwiseAgitator Agitator AgitatorRotation Rotation RotationCounterclockwise Counterclockwise CounterclockwiseAgitator Agitator AgitatorRotation Rotation Rotation
Reference Reference
ReferenceLetter Letter LetterDescription Description
Description
DMuf󰘱ers
EPlugs
FSwivelconnector
GNippleconnector
HAirregulator
JAirgauge
KAirmotor
83A4797F

Installation
Agitator Agitator
Agitator
Toreducetheriskof󰘰reandexplosion,always
maintainaminimumof1in.(25.4mm)clearance
betweentherotatingagitatorpartsandthe
containertopreventsparksfromcontact.
•Ifinstallinganewagitatorontoanewtank,follow
steps1–2,and7–15(models25C536,25C537,
25C538).
•Ifreplacinganestablishedagitator,followsteps
1,3–12,and14–15(models25C539,25C540,
25C541).
•Ifreplacingtheagitatordrivewithkit
19A844,followthestepsdescribedin
InstallingMotorConversionKits,page18.
1.Relievepressurefromthesystem(if
applicable)byfollowingtheprocedureinthe
PressureReliefProcedure,page13,andremove
thepressuretankcoverfromthetank.
2.Unscrewandremovethehexjamnut(49),plug
(P),ando-ring(R)fromthetankcover.
3.RemovetheupperU-bolt(56).
4.Loosenthetwoagitatorpaddlesetscrews(46)
andremovetheagitatorpaddle(45).
5.On10and15gallontanks,removethelower
U-bolt(56),loosenscrews(54),andslidethe
baf󰘱e(53)offthe󰘱uidtube(12).
6.Unscrewandremovethehexjamnut(49),
gasket(50),andagitatorfromthetankcover.
7.Toinstallthenewagitator,placethegasket(50)
ontopofthetankcovercenterhole.Insertthe
agitatorshaft(47)throughthegasketandcenter
hole.
Note
Positiontheairmotorandregulatoras
shownabove.
8.Installthejamnut(49)belowthetankcover,
andtighten󰘰rmlytoassureasealbetweenthe
gasket(50)andtankcover.
9.Installtheshaftsupport(44)ontotheshaft
housing(42).Verifylowerthrustwasher(48)is
betweenshaft(47)shoulderandhousing(42).
10.ClampwithupperU-bolt(56),clamp(43),lock
washer(41),andnut(55).
11.Onthe10and15gallontanks,placethelower
bearingassembly(66)and(67)ontheshaft.
3A4797F9

Installation
12.Assemblethepaddle(45)ontheshaft(47).See
the󰘰gurebelow.Alignthebottomofthepaddle
hub󰘱ushwiththebottomoftheshaft.Tightenthe
twosetscrews(46)󰘰rmlytosecurethepaddle.
Thepaddleheightontheshaftcanbeadjusted
ifdesired.Thebottommark(H)ontheshaftis
thelowestrecommendedpaddlepositiononthe
shaft.Alignthetopofthepaddlehubwiththis
mark(H)forthelowestposition.
•For5gallontanks: Ifa5gallonpainistobe
placedinside thepressuretank,alignthetop
ofthepaddlehub(45)withtheuppermark(J)
ontheagitatorshaft(47).
13.Notetheorientationofthebaf󰘱e(53)inthe󰘰gure
onpage9.Onthe5gallontank,clampthelower
U-boltdirectlytotheshaftsupport(44)(see
󰘰gureabove).Slidethebaf󰘱e(53)overthe󰘱uid
tube(12)andpositionthebaf󰘱eabout1/2in.
(13mm)abovethehighestpointontheagitator
paddle(45).ClampinplacewiththelowerU-bolt
(56),washer(41),andnut(55).
Onthe10and15gallontanks,slidethebaf󰘱e
(53)overthe󰘱uidtube(12)andpositionthe
baf󰘱eabout1/2in.(13mm)abovethehighest
pointontheagitatorpaddle(45).Clampinplace
withthelowerU-bolt(56),washer(41),andnut
(55)onthelowerbearingassembly(66)and(67).
Incorrectorientationofthebaf󰘱e(53)tothe
shaftcancausebindingoftheagitatorassembly
resultinginhigheroperatingpressuresneededto
runtheagitator.Theagitatorshouldrunatless
than10psig(0.7bar)whendry.
14.Removetheplugorexistingelbowfromtheair
inletmanifold(5).Installthenewelbow(69)into
thepressuretankairinletmanifold.
15.Connecttheswivelendoftheairhose(70)to
theelbow(69).
103A4797F

Installation
Grounding Grounding
Grounding
Theequipmentmustbegroundedtoreducethe
riskofstaticsparking.Staticsparkingcancause
fumestoigniteorexplode.Toreducetherisk
ofstaticsparking,themountingcoverandall
electricallyconductiveobjectsordevicesinthe
sprayareamustbeproperlygrounded.
Agroundwireandclampareincludedwiththetank.
•Togroundtheagitator,connectoneendofthe
groundwire(GW)tothegroundconnector(77)on
agitatordriveguard(74).Connecttheotherendof
thegroundwiretoatrueearthground.
•Togroundthepressuretank,connectoneendof
a12awg(1.5mm2)minimumgroundwiretothe
pressuretankandtheotherendofthewiretoa
trueearthground.
Connecting Connecting
ConnectingHoses Hoses Hoses
Installanairinlet󰘰lter(AF)upstreamfromtheair
inletballvalve(17)toremovedirtandmoisturefrom
thecompressedairsupply.Connectanairsupply
hose(SH)betweentheairinletballvalveandtheair
󰘰lterairoutlet.
Connecttheatomizingairhose(AH)totheairspray
gun(AG)fromanairoutletoftheairmanifold.
Connecta󰘱uidhose(FH)betweenthe󰘱uidoutlet
ballvalve(18)andtheairspraygun(AG)󰘱uidinlet.
Recommended Recommended
RecommendedHose Hose HoseSizes Sizes Sizes
Generalpurposehosesizesarelistedbelow.
FluidAir
Forrunsof:Use:Forrunsof:Use:
0to35ft(0
to11m)
3/8"ID0to50ft(0
to15m)
5/16"ID
35to100ft
(11to30m)
1/2"ID50to100ft
(15to30m)
3/8"ID
100to200ft
(30to61m)
3/4"ID100ft+(30
m+)
1/2"ID
Air Air
AirLine Line LineFilter Filter Filter
Airline󰘰ltersremoveharmfuldirtandmoisturefrom
thecompressedairsupply.Orderpart106148for
3/8nptor106149for1/2npt.
3A4797F11

Operation
Operation Operation
Operation
Personalinjury,suchassplashingintheeyes,
mayresultfrompressureinthetank.Alwaysfollow
thePressureReliefProcedure,page13before
openingthetankcoveror󰘰llport.
Personalinjuryorequipmentdamagemayresult
fromlifting/fallingheavyequipment.Toavoid
personalinjuryorequipmentdamage:
•Donotliftthedrumcoverandagitatorwithout
properassistance.
•Donotwalkorstandbeneatharaisedelevator.
Preparing Preparing
Preparingthe the theFluid Fluid Fluid
Preparethe󰘱uidaccordingtomanufacturer
instructions.Strainthe󰘱uidtoremovelargeparticles
thatcouldclogthespraygunorthesiphontube.
Filling Filling
Fillingthe the theTank Tank Tank
Agitatorsareusedtokeepsolidsinsuspension,
whichassistsinkeepingsolidsfromcloggingthe
siphontube.Ifsolidshavesettledinthecontainer,
useashakerorsomeotherdevicetothoroughly
agitatethe󰘱uidbeforeinstallingandoperatingthe
agitator.
1.FollowthePressureReliefProcedure,page13.
2.Fillthe󰘱uidsupplycontainer(throughthe󰘰llport
inthecover,orremovethecoverandpour󰘱uid
directlyintothetank)toabout3or4inches(75
to100mm)abovetheagitatorblade.
Ifutilizinga5-gallontank,useoneofthefollowing
methodsforpaintplacement:
a.Removethecoverandplacea5-gallonpail
of󰘱uidinthe5-gallontank.
b.Removethecoverandplacea5-gallon
antistaticpolyethylenelinerinthe5-gallon
tank.Pourthe󰘱uidintotheantistatic
polyethyleneliner.
Note
Ifa5-gallonpailisusedinsidethe
tank,anadjustmentisrequired
totheagitatorpaddlepositionto
avoidinterference.Seestep12in
Agitator,page9foradjustment
information.
3.Besurethegroundwireisattached.
4.Replacethe󰘰llercaporcover,tightenthe
c-clamphandlesto8-10ft-lbs,approximately1/2
to1turnpasthandtight.
Operating Operating
Operatingthe the theAgitator Agitator Agitator
Over-pressurizingthetankoraccessoriescould
causeaparttorupture.Toreducetheriskof
seriousinjury,suchassplashing,orproperty
damage,neverexceedthemaximumairand󰘱uid
workingpressureofthelowestratedcomponent
inyoursystem.
NOTICE NOTICE
NOTICE
Toavoiddamagingtheequipment,donotoperate
theagitatoratahighspeedforalongperiodof
time.Excessiveagitatorspeedcancausefoaming
of󰘱uid(makingthe󰘱uidunusable),vibration,and
increasedwearonparts.Onlyagitatethe󰘱uid
enoughtomaintainevenmixing.
1.Fillthepressuretank.See
FillingtheTank,page12.
2.Besuretheairinletballvalve(17)isclosed.
3.Closetheairregulatorvalves(31,38)byturning
theknobscounterclockwise.
4.Turnontheairsupply.
5.Opentheairsupplyinletballvalve(17).
6.Tostarttheagitator,slowlyopentheagitatorair
regulatorvalve(38).Adjustthespeedofthe
agitator,toabout40to60rpm,ifneeded.
7.Openandadjustthetankairregulator(31)tothe
approximatepressuredesired.
8.Openthe󰘱uidoutletballvalve(18).
9.Turnontheatomizingairtotheairspraygun.
Testsprayasmallareaandadjustthepressure
asnecessary.Alwaysusethelowestpossibleair
pressuretoobtainthedesiredresults.
10.Tostoptheagitator,turntheairregulator
counterclockwisetoreducepressuretozero,or
closetheairinletballvalve(17)tothetank.
123A4797F

Operation
Pressure Pressure
PressureRelief Relief ReliefProcedure Procedure Procedure
FollowthePressureReliefProcedure
wheneveryouseethissymbol.
Theagitatorandpressuretanksremainpressurized
untilpressureismanuallyrelieved.Tohelpprevent
seriousinjuryfromsplashing󰘱uidandmoving
parts,followthisprocedure:
•Beforeyoucheckorserviceanypartofthespray
system
•Beforeyouloosenorremovethepressuretank
coverof󰘰llport
•Wheneveryoustopspraying
1.Shutofftheairsupplytothetankbyclosingthe
airinletvalve(17).
2.Openthedraincock󰘰tting(7)byturningit
counterclockwise.
3.Waituntilthereisnoairescapingthroughthe
draincock󰘰ttingbeforeremovingthecoveror
openingthe󰘰llport.
4.Leavethedraincock󰘰tting(7)openuntilyou
havereinstalledthecoveror󰘰llport.
Note
Tightenthec-clampto8-10ft-lb.(10.8-13.6
N•m),approximately1/2to1turnpasthand
tight.
Safety Safety
SafetyRelief Relief ReliefValve Valve Valve
Asafetyreliefvalve(4)automaticallyrelievesthe
tankpressurewhentheairpressureexceeds95to
100psi(0.5to0.6MPa,6.5to7bar).
Eachweek,checktheworkingorderofthesafety
reliefvalve.
Onlyasatest ,raisetheairpressure
to95to105psi(0.5to0.6MPa,6.5to7.1bar).If
thesafetyreliefvalvedoesnotrelievethepressure,
replaceitimmediately.Donotattempttorepairit.
Thesafetyreliefvalvewillresetautomaticallywhen
thepressureisrelieved.
3A4797F13

Maintenance
Maintenance Maintenance
Maintenance
Movingparts,suchasanimpellerblade,cancut
oramputate󰘰ngers.Toreducetheriskofserious
injury,alwaysshutofftheagitatoranddisconnect
theairlinebeforecheckingorrepairingtheagitator.
Beforeperforminganymaintenanceprocedure,
followthePressureReliefProcedure,page13.
Greasing Greasing
Greasingthe the theAir Air AirMotor Motor Motor
Afterevery20millionrevolutionsoreverythree
tofourmonths(whichevercomes󰘰rst),grease
themotorneedlebearing.Recommendedgrease:
MOBILGREASEXHP222SPECIALorequivalent
withminimum󰘱ashpointtemperatureof399.2°F
(204°C).
1.FollowthePressureReliefProcedure,page13.
2.Removethemotortopcover(103).
3.Usingamanualgreasegun,pushgreaseinto
the21RC󰘰tting(102)untilgreaseisseenbelow
thetopwasher(109a).
Air Air
AirMotor Motor MotorMuf󰘱er Muf󰘱er Muf󰘱er
Dependingontheenvironmentofthemotor,
periodicallycheckthecleanlinessoftheairmotor
muf󰘱er.Dirtyorcloggedairmuf󰘱ersresultin
decreasedmotoref󰘰ciencyandmaycausethemotor
torunirregularly.Ifthemuf󰘱erisdirtyorclogged,
replaceitwithanewmuf󰘱er.
Cleaning Cleaning
Cleaningthe the theShaft Shaft Shaft
Eachweek,cleananydried󰘱uidfromaroundthe
bearing(66)areaoftheshaft(47)andinspectthe
bearingforcrackingorexcessivewear.
143A4797F

Maintenance
Cleaning Cleaning
Cleaningthe the theTank Tank Tank
Toavoid󰘰reandexplosion,alwaysgroundthe
equipmentandwastecontainer.Toavoidstatic
sparkingandinjuryfromsplashing,always󰘱ushat
thelowestpossiblepressure.
•Flushequipmentonlyinawell-ventilatedarea.
•Flushatthelowestpressurepossible.Check
connectorsforleaksandtightenasnecessary.
•Flushwitha󰘱uidthatiscompatiblewiththe
󰘱uidbeingdispensedandtheequipmentwetted
parts.
1.FollowthePressureReliefProcedure,page13.
2.Followtheprocedurebelowtoforcethe󰘱uid
backthroughthehoseandintothetank:
a.Loosenthespraygunaircapretainingring
abouttwoturns.
b.Holdaragovertheaircapandtriggerthe
gunforafewseconds,untilthe󰘱uidisforced
backintothetank.
3.Removethetankcover.
4.Emptythe󰘱uidfromthetankandpourasuitable
amountofsolventintoit
Note
Besurethatthesolventiscompatible
withthe󰘱uidbeingsprayedandwith
thewettedmaterialsinthetank.Refer
toTechnicalSpeci󰘰cations,page27for
informationonwettedpartmaterials.
5.Replacethetankcoverandtightenthec-clamps
to8-10ft-lb.(10.8-13.6N•m),approximately1/2
to1turnpasthandtight.
6.Closethedraincock󰘰tting(7).
7.Turnontheairsupply.
8.Holdametalpartofthegunagainstagrounded
metalwastecontainerandtriggertheguninto
thewastecontaineruntilcleansolventcomes
fromthegun.
9.Removethesolventfromthesystem.Wipethe
insideofthetankandtherestoftheequipment
cleanwithasolvent-dampenedrag.
3A4797F15

Service
Service Service
Service
Movingparts,suchasanimpellerblade,cancut
oramputate󰘰ngers.Toreducetheriskofserious
injury,alwaysshutofftheagitatoranddisconnect
theairlinebeforecheckingorrepairingtheagitator.
Beforeperforminganyserviceprocedure,followthe
PressureReliefProcedure,page13.
Iftheairmotorrequiresmorethaninstallationofa
servicekit,itisusuallyquickestandeasiesttosendit
toaGracodistributorforrepairorreplacement.
Motorrebuildkitsareavailableandlistedinthetable
below.Seemanual3A5050formoreinformation.
Kit Kit
KitDescription Description Description
25M535Fullairmotorrebuildkit
25P720Needlebearingrebuildkit
25P721Singlepistonassemblyrebuildkit
25P860Endcapkit
19Y509Muf󰘱erkit(setof3)
Removing Removing
Removingthe the theAir Air AirMotor Motor Motor
Toremovetheairmotorforservice,followthese
steps,
1.Removethescrew(75)holdingtheguardand
thenremovetheguard(74).
2.Removethefourscrews(26)securingthemotor
tothemountingbracket(58).
3.Removethethreescrews(35)securingthe
motor(34)theadapterplate(22).
4.Disconnecttheairregulator(38).
Installing Installing
Installingthe the theAir Air AirMotor Motor Motor
Toinstalltheairmotor,followthesesteps.
1.Securethemotor(34)totheadapterplate(22)
usingthreescrews(35).Torqueto150–170
in-lbs(17–19N•m).
2.Installtheuppercouplinghalf(52b)onthemotor
shaft.Lightlytightenthesetscrew.Youwill
tightenitfurtherinalaterstep.
3.Installthelowercouplinghalf(52c)onthe
agitatorshaft(47).Donottightenthesetscrew
atthistime.
4.Installthemotor(34)andadapterplate(22)
assemblyonthetopofthebracket(58)using
thefourscrews(26).Donottightenthescrews
securelyatthistime.
163A4797F

Service
Servicing Servicing
Servicingthe the theAgitator Agitator AgitatorShaft Shaft Shaftand and and
Couplings Couplings
Couplings
Setting Setting
Settingthe the theAgitator Agitator AgitatorShaft Shaft ShaftCoupling Coupling Coupling
1.Withtheagitatorshaft(47)pushedupagainstthe
lowerwasher(48),securethelowerportionofthe
couplinghalf(52c)totheshaftbytighteningthe
couplingsetscrewagainstthe󰘱atontheshaft.
Leaveabouta0.015in.(0.38mm)gapbetween
thecouplinghalfandupperwasher(48).
2.Aligntheuppercoupling(52b)withthelower
couplingandtightenthefourscrews(26).
Tightento150–170in-lbs(17–19N•m).Leave
a0.015in.(0.38mm)gapbetweeneachofthe
couplinghalvesandthespider(52d).
3.Connecttheairregulator(38).Checkfor
properalignmentbyrunningtheagitatoratlow
pressuresandspeeds.Ifnecessary,adjustthe
alignmentbylooseningandretighteningthefour
adapterplatescrews(26).
3A4797F17

Service
Replacing Replacing
Replacingthe the theAgitator Agitator AgitatorShaft Shaft Shaft
1.Removetheagitatorpaddle(45).Removethe
setscrewfromthelowercoupling(52c).Pullout
theagitatorshaft(47)andinstallthenewshaft.
Replacetheagitatorpaddle(45).
2.Withtheagitatorshaft(47)pushedupagainst
thelowerwasher(48),securethelowerportion
ofthelowercouplinghalf(52c)totheshaftby
tighteningthecouplingsetscrewagainstthe󰘱at
ontheshaft.Leaveabouta0.015in.(0.38mm)
gapbetweenthecouplinghalfandwasher(48).
Replacing Replacing
Replacingthe the theShaft Shaft ShaftSeals Seals Seals
1.Removetheguardmountingscrew(75)and
removetheguard(74).
2.Removethethreecapscrews(51)andwashers
(40)fromthemountingbracket(58),andremove
theairmotorassembly.
3.Withairmotorassemblyremoved,removethe
setscrewfromthelowercouplinghalf(52b).Pull
outtheagitatorshaft(47).
4.Removethehexnut(49)andremovetheshaft
housing(42).Removetheseals(42a,42b)from
theshafthousing,andinstallthenewseals.
5.Reinstalltheshafthousingandshaft.Use
installationstepslistedinSettingtheAgitator
ShaftCoupling.
Installing Installing
InstallingMotor Motor MotorConversion Conversion ConversionKits Kits Kits
Installing Installing
InstallingMotor Motor MotorConversion Conversion ConversionKit Kit Kit19A844 19A844 19A844
1.Removetheexistingmotorandgearbox.See
manual308371forinstructions.
2.Removetheexistingshaftassemblyandturnthe
tankcoveroverinordertoreplaceseal(42b)
locatedinsidethebearinghousing(42).(See
the󰘰gureinAllModels,page19.)Removethe
existingseal(42b)andreplacewithanewseal.
Reinstalltheshaftassembly.
Note
Iftheexistingshaftisdamagedin
thebearinghousingarea,replacethe
shaftwithanewshaftforbestsealing
performance.
3.Ifreplacingbothshaftseals42aand42b,follow
thestepsinReplacingtheShaftSeals,page18.
4.Installtheairmotor.See
InstallingtheAirMotor,page16and
SettingtheAgitatorShaftCoupling,page17.
5.Installtheairregulatorandmuf󰘱ers.See
AirRegulatorandMuf󰘱ers,page7.
6.Attachthe󰘰ttings(36,8)andthehose(70)to
completetheconversion.
Installing Installing
InstallingMotor Motor MotorConversion Conversion ConversionKit Kit Kit26B168 26B168 26B168
1.Loosentheupperhexheadscrewonthe
retainingbracket.
2.Removetheexistingmotorandgearbox,aswell
asanyspacers.
3.Inserttheairmotorwithadapter.
4.Installtheairregulatorandmuf󰘱ers.See
AirRegulatorandMuf󰘱ers,page7.
5.Attachthe󰘰ttings(36,8)tocompletethe
conversion.
6.Checkforproperalignmentbyrunningthe
agitatoratlowpressuresandspeeds.If
necessary,adjustthealignmentbylooseningthe
threeadapterscrewsandretighteningwhilethe
agitatorslowlyspins.
183A4797F

Parts
Parts Parts
Parts
All All
AllModels Models Models
1
Locatethebottomshoulderoftheshaft(47)againstthebottomwasher(48)whenassembling
thecoupler(52c).
2
Bearings66and67arenotusedonthe5-gallonmodel.AttachtheU-bolt(56)tothesupport
shaft(44).
Followrecommendedtorquespeci󰘰cationsfoundintheInstallationsectionofthismanual.
3A4797F19

Parts
Ref Ref
Ref
No. No.
No.
Part Part
Part
No. No.
No.Description Description
DescriptionQty Qty
Qty
8**†100030Bushing1
22**17R038Plate,Adapter,Agitator1
26**100057Screw,Cap,SocketHead4
34**†25C765
Motor,Air,RotaryPiston;
includes36,37,38,39.
Seemanual3A5050for
motorrebuildkitsand
muf󰘱erkits.
1
35**124313Screw,Shcs,M6-1x16
mm,StainlessSteel3
35†112674Screw,SHCS,M6-1x
35mm,NickelPlatedCS3
36156823Fitting,Union,Swivel2
37156971Fitting,Nipple,Short1
38116513Regulator,Air1
39108190Gauge,Pressure,Air1
40100020Washer,Lock3
41104123Washer,Lock,Spring6
4225T544HousingAssembly,Shaft;
includes42aand42b1
42a103553Seal,shaft1
42b19B748Seal,shaft1
43112533Plate,Clamp1
44210576Support,Shaft;includes
item661
45*236098Paddle,Agitator;plastic1
46131497Screw,Set,Sch2
188886
Shaft,Agitator;15inches;
Models25C536and
25C539
1
188887
Shaft,Agitator;21inches;
Models25C537and
25C540
1 47
188888
Shaft,Agitator;31inches;
Models25C538and
25C541
1
Ref Ref
Ref
No. No.
No.
Part Part
Part
No. No.
No.Description Description
DescriptionQty Qty
Qty
48104373Washer,Thrust2
49188784Nut,Jam,Hex1
50196309Gasket3
51102598Screw,Cap,SocketHead3
52**17R478Coupling,Flexible1
52†19B501Coupler,3rdParty1
52a†120087Setscrews2
53171989Baf󰘱e,Agitator1
54112222Screw,Cap,Sch2
55112223Nut,Hex,Regular6
56110278Bolt,U2
58181749Bracket,Mounting1
66171970
Bearing,PTFE;included
withmodels25C540and
25C541only
1
67187324
Housing,Bearing;
includedwithmodels
25C540and25C541only
1
69112307Fitting,StreetElbow1
70160023Hose,Coupled1
74194701Guard,Agitator,Drive1
75100078Screw,ThreadForming,
HexHead1
76157021Washer,Lock,Int1
77111593Screw,Grounding1
78186620Label,Symbol,Ground1
80▲17P806SafetyTag(notshown)1
▲Replacementsafetylabels,signs,tags,and
cardsareavailableatnocost.
*Awelded304stainlesssteelpaddleisavailable.
Orderpartnumber186517.
**IncludedwithMotorConversionKit19A844.
†IncludedwithMotorConversionKit26B168.
203A4797F