Vmac VR70 Manual

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1

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SalesRepServiceInformationSheet

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VMACrotaryscrewcompressorsystemsaredesignedandmachinedtoexactingtolerances.Theyare

uniqueinthattheycontainnoreed‐valvesorothereasilyfouled,fatigue‐pronecomponents.However,

propermaintenanceisneededtoensureperformanceandlongevityofthecompressorsandcanreduce

theneedforprematurerepairorcomponentreplacement.

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Systemfiltersalsoenhanceperformanceandextendcomponentlifebyreducingdamagefromdustand

otherdebris.Foreignparticlesenteringthesystemwilldrasticallydamageorshortenthelifeexpectancy

ofthecompressorandwillresultindamagetobearings,gears,rotorsandtheinsideofthehousing.

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Thefollowingmaintenancescheduleshouldbeobservedtoassuregoodperformanceandlongservice

life.ThehoursindicatedarethosedisplayedontheCompressorControlPanel.Serviceintervalshould

bewhicheveroccurssooner(e.g.,200hoursofoperationor6months)

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UNDERHOODMaintenanceSchedule

50hours:Checkthedrivebelt

200hoursor6months:Replacetheairfilter,oilfilterandchangeoil.Useservicekit#A700019(VR70)

#A700059(VR140)

400hoursor1year:Replacetheairfilter,oilfilter,coalescingelementandchangeoil.Useservicekit

#A700020(VR70)#A700060(VR140)

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PREDATAIRMaintenanceSchedule

PREDATAIR(H600001)

200hoursor6months:Replacetheairfilter,oilfilterandchangeoil

PREDATAIR(H600002andH400001)

500hoursorevery6months

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Inadditiontoregularservicing,besuretocheckthecompressor’sairfilterfrequentlytoensurethatitis

notrestrictedordamaged.Properfiltermaintenanceisalsokeytolongcompressorlife.Regular,

scheduledmaintenanceincludes:

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•inspectingtheaircleanerandmaintainingtheoillevel

•morefrequentserviceinsevereoperatingconditions

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ServiceTips

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•Neverrunthecompressor,drivethevehicleorevenallowthevehicletositparkedwithoutthe

recommendedairfilterandfiltercoverinstalled.

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•AlwaysuseaVMACoilfilterwhichisdesignedtowithstandthehighpressures,notan

automotivefilter.

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•Operatethesystematleastevery30daysfor15minutesatnoloadtoensurebearing

lubricationandrotation.Impactdamageandprematurebearingfailuremayoccurinthe

compressorbearingsifthesystemisnotoperatedonaregularbasisduetovibrationcausedby

truckoperation.

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•Neverattempttocleanthefilterelementwithcompressedair.Replacethefilterelement.

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•Donotattempttochangetheoilfilteruntiltheoilhascooled.Hotoilcancausesevereburns.

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•Neverover‐tightenthefilter,asthismaydamagethesealorthefilter.

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•Useonlythesuppliedcompressoroilinthissystem.Failuretousethisspecialoilwillresultin

damagetothecompressorandwillvoidyourwarranty.

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•Donotoverfillthesystem.Overfillingthesystemwithoilcanfloodthesightglasswindowand

makethesystemappearempty.

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•Ifyouusesolventsforcleaning,thoroughlyrinsethepartswithhotwatertoremoveallsolvent

residues.

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•Checktheinsideofthetankforanyevidenceofmetalfilingsorcontamination;iffound,flush

thetank,hosesandcooler.Metalfilingswilldamagethecompressor.

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4

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Maintaining

VR70andVR140

UNDERHOOD

AirCompressors

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5

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MaintainingtheVRSystem

Organizedmaintenancepracticeswillincreasethelifeexpectancyofthecompressorsystemand

maintainoperationwithinthemanufacturedparameters.VMAChasrecommendedserviceintervalsfor

theirsystemthatisbasedonactualtestingandperformance.TheVRsystemrequiresregular

maintenancethatincludes:

•inspectingandreplacingthedrivebelt

•changingsystemoil

•changingfilters

•cleaningfilterscreens

DuringthewarrantyperiodyoumustfollowthemaintenancescheduleandonlyuseoriginalVMAC

replacementpartstomaintainthesystemandthewarranty.Periodicmaintenanceservicekitsare

availablefromVMAC.

Themostcriticalaspectofcompressoroperationisproperairfiltration.Contaminationenteringthe

intakecancausesevere,rapiddamagetorollerbearings,gearsandrotorsinthecompressor.

Neveroperatethetruck,thecompressororevenallowthetrucktoremainparkedwithoutthe

recommendedairfilterandcoverinstalledonthecompressor.

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Performingapre‐serviceinspection

Inspectthesystemcarefullyandcheckthefollowing:

•lookforleaksatthecompressor,cooler,tank,filterandlinefittings

•checkthecompressorandbrackettomakesurethattheyaretightandsecure

•checkthecoolertomakesurethatitistightandsecure

•checkthetankbracketsandtankmountingtomakesurethattheyarenotloose

•checkallfastenersforevidenceofmotionorvibrationloosening

•examineallthelinesforevidenceofrubbing,chafingorotherenvironmentaldamage

•usingtheappropriatetools,checkallthelinefittingstomakesurethattheyaretight

•checkelectricalconnectionsforsecurity

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•checkallwiringforsecurityanddamage

•checkthecontrolunitstomakesurethattheyaresecure

Ifyoudiscoveranyproblems,performthenecessaryrepairstopreventfurtherdamage.Protectall

wiring,lines,connectionsandfittingsasrequired.Tightenanyloosefastenersandreplaceanydamaged

fastenersorcomponents.

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6

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PeriodicMaintenance

Themaintenancescheduleforthesystemisshowninthefollowingtable.Thehoursshownonthetable

arethosedisplayedonthecontrolpanelread‐out.Serviceshouldbeperformedatthelesserofthetwo

intervals,whicheveroccursfirst.Followingthisprocedurewillensureoptimumperformanceandlong

lifefromtheVRsystem.

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Theseserviceintervalsarebasedonnormaloperation.Commonsenseandgoodmaintenancepractices

willindicatewhethertheseproceduresshouldoccurmorefrequently.Forexample,ifthetruckis

continuouslyoperatinginanextremelydustyenvironment,theairfilterandbeltshouldbeinspected

morefrequently.Sincethecompressordrawsinlargequantitiesofairduringoperation,thefiltermay

becomepluggedandwillaffectoperation.

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InspectingtheDriveBelt

Periodicinspectionofthedrivebeltisnecessarytoidentifypotentialproblemsbeforetheycausefailure

ordamage.WhileVMACrecommendsa50hourinterval,iftheoperatingenvironmentissevere,you

shouldinspectthebeltmorefrequently.

Checkthebeltcarefullyforsignsofglazing,missingportionsoftheribsordamagetotheedgesor

surface.Ifthereisdamage,itmayindicateaproblemwithpulleyalignmentorimproperusebythe

operator.Installinganewbeltwillnotcorrecttheproblem,itwilljustresultindamagetothenewbelt.

Abeltthatisheat‐damagedindicatesthatthebeltisslippingonthecompressororcrankshaftpulleys.

Thismaybecausedbyadefectivetensionerorbytheoperatorengagingthecompressorwhilethereis

pressureinthesystem.Thiscancausethecompressorclutchtostallandthebeltwillslip.Ifthe

tensionerisapplyingsufficientpressureandismaintainingbelttensioncorrectly,talktotheoperator

andfindouthowtheyareusingthesystem.Inspecttheidlers,pulleysandtensionerfordamage.Any

componentthatshowschips,cracksorotherphysicaldamageshouldbereplaced.

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Ifthebeltisdamagedorwornalongtheedges,itcouldindicateanalignmentproblem.Ifthisoccurs,

checkthealignmentofallpulleys,idlersandtensionerswithastraightedge.Ifthereisanalignment

problem,checkallsystemfastenerstomakesurethattheyaretight.Alsocheckforcrackingordamage

onthemountingbracketandatthecompressor.

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7

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InspectingandReplacingtheAirFilter

Properairflowintothecompressorisvitallyimportantforgoodperformance.Ifthefilterbecomes

plugged,thecompressorwillnotbeabletomeetthedemandsandwillprobablyoverheat.While

VMACrecommendsthatyoureplacethefilterevery200operatinghoursortwiceayear,youshould

replacethefiltermorefrequentlyinsevereoperatingconditions,whereitcouldbecomecontaminated

morequickly.

Tocheckthefilter,followthisprocedure:

1.Makesurethatallairpressurehasbeenventedfromthesystem.

2.Cleantheareaaroundthecompressorandfiltercover.

3.Removethefiltercoverretainingnut,thecoverandthefilterelement.

4.Immediatelycovertheopeningofthecompressorwithaclean,dryclothorwithmaskingtoprevent

contaminationfromenteringthecompressor.Donotoperatethetruckorthecompressoruntilthefilter

andcoverhavebeeninstalled.

5.Cleantheinsideofthefiltercoverwithaclean,drycloth.Ifnecessary,youcanusesolventtoclean

theinsideofthecover.Ifyouusesolvent,makesurethatyourinsethecoverwithwateranddryit

thoroughlybeforeinstallingitonthecompressor.Solventfumesenteringthecompressorcouldignite

duringthecompressionprocess,causinganexplosion.

6.Examinethefiltercarefullyforcontamination.Placeatrouble‐lightontheinsideofthefilterand

rotateitoverthelightwhileexaminingtheelement.Theamountoflightthatshinesthroughthe

elementisagoodindicatorofhowmuchaircanpassthroughtheelement.Ifthelightisdimorblocked,

airwillnotbeabletogetthrough.

7.Ifthefilterisdirty,removetheclothormaskingandinstallanewfilter.Donotattempttowashor

blowthefilterelementclean.Thesearenotserviceablefilters,theymustbereplaced.Using

compressedairtocleanafilterelementwilldamagethematerialandallowcontaminationtoenterthe

system.

8.Replacethecoverandthecovernut.Becarefulnottoovertightenthenut.

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8

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CompleteMaintenanceoftheVRSystem

Completesystemmaintenanceshouldbeperformedonceeachyearorevery400systemoperating

hours,whicheveroccursfirst.Again,aswithpreviousserviceitems,youmayhavetoservicemore

frequentlyinsevereoperatingconditions.

Completemaintenancenotonlyincludesreplacingoilandfilters,italsoincludesacompleteinspection

ofthesystem.Thiswillensurethatthesystemcontinuestoprovideoptimumperformanceandwill

extendthelifeexpectancyofthecomponents.

Forbestresults,followthesestepsforservicing:

1.Performacompletepre‐serviceinspectionofthesystem.

2.Replacetheairfilter

3.Draintheoilfromthesystem

4.Replacetheoilfilter

5.Replacethecoalescingseparatorandcleanorreplacethescavengefilter

6.Fillthesystemwithoilandcheckoperation

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ReplacingtheAirFilter

Followtheproceduresoutlinedpreviouslyforairfilterreplacement.



DrainingOilfromtheSystem

Theoilshouldbedrainedfromthesystembeforechangingfiltersorcleaningthescavengefilter.Make

surethatyouhaveasuitablecontainerthatwillholdapproximately2gallons(US)beforeyoubegin.

Whendrainingtheoil,followthisprocedure:

1.Makesurethatallairpressureisventedfromthesystem.Ifthereisanypressureinthesystem,you

couldbeinjuredwhenyouremovethedrainplug.

2.Placethedraincontainerunderthetankbelowthedrainplug.

3.Usingthecorrecttool,removethedrainplugfromthetank.Becarefulwhendrainingthetank.Ifthe

systemwasoperatedrecently,theoilmaybeveryhotandcancauseburns.

4.Cleanthedrainplugthreadsandinspectthemfordamage.

5.Cleanandinspectthethreadsinthetank.

6.Installandtightenthedrainplugsecurely.



9



ReplacingtheOilFilter

Cleanlubricatingoilisvitalforefficientoperationandforpreventingdamagetocomponents.Replacing

theoilfilteratregularintervalswillhelpkeepcontaminantsoutofthecompressorandtherestofthe

system.Whenreplacingtheoilfilter,rememberto:

•makesurethatthereisnopressureinthesystem

•useaproperfilterwrench

•neverover‐tightenthefilter

•checktheoillevelafteroperatingthesystem

•checkforoilleaksafterservice

Toreplacetheoilfilter,followthisprocedure:

1.Cleantheareaaroundthefiltertopreventcontamination.

2.Removethefilterbyturningitcounter‐clockwise.Makesurethatyoudraintheoilfromthefilterinto

asuitablecontaineranddisposeofthefilterandoilaccordingtolocalregulations.Beforeyoudisposeof

thefilter,checktomakesurethatthethreadednippledidnotunscrewwiththefilter.Ifthenippleisin

thefilterratherthaninthecompressor,tankorremotemount,removeitcarefullytopreventthread

damageandreplaceitinitsoriginallocation.

3.Checkthesealingsurfaceonthecompressor,tankorremotemounttomakesurethatitiscleanand

smooth.

4.Applyalightcoatingofcompressoroiltothegasketonthenewfilter.

5.Spinthefilteronthethreadednippleuntilthegasketcontactstheseat.

6.Tightenthefilteranadditional¾to1fullturntoprovideagoodseal.



ReplacingtheCoalescingSeparatorandScavengeFilter

Toperformthispartoftheservice,youmustremovethebackcoveronthetank.Beforeattemptingto

replacethecoalescingseparatorandscavengefilter,alwaysmakesureofthefollowing:

•thereisnopressureinthesystem

•theoilhasbeendrainedfromthetank

•thebackofthetankhasbeencleanedtopreventcontamination

•becarefulofhotoil

Whentheseconditionshavebeenmet,followthisprocedure:

1.Cleanthebackofthetanktopreventcontamination.

2.Disconnecttheairoutletline,1/4inchand5/16inchlinesfromthebackofthetank.

3.Removetheboltsholdingthedischargecapfromthebackofthetankandremovethecapandsmall

spring,ifequipped.



Topreventdamagetothetank,removealloftheboltscompletelywhileholdingthe

dischargecapfirmlyinplaceasthecoalescingseparatorelementisspringloadedagainst

thedischargecap.



10



4.Removethecoalescingseparatorelement,largespring(andontheVR140,thespringplate)from

insidethetank.Discardthecoalescingseparatorelement.

5.RemoveanddiscardtheO‐ringsealandtherearcapseal.

6.Wipeouttheinsideofthetank



Otros manuales para VR70

Este manual sirve para los siguientes modelos

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Vmac

Vmac VR70 Manual de usuario

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Vmac Underhood 70 Manual de usuario

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Vmac VR70 Manual de usuario

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Vmac V400001 Manual de usuario

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Vmac VR70 Manual de usuario

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Vmac UNDERHOOD 40 Series Manual de usuario

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Vmac VR70 Manual de usuario

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Vmac RAPTAIR-MF Instrucciones de instalación

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Vmac Underhood 70 Manual de usuario

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Vmac UNDERHOOD 40 Series Manual de usuario

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Vmac UNDERHOOD 40 Series Manual de usuario

Vmac

Vmac DM00030 Manual de usuario

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Vmac UNDERHOOD 40 Series Manual de usuario

Vmac

Vmac D600003 Instrucciones de instalación

Vmac

Vmac VR70 Manual de usuario

Vmac

Vmac VR70 Manual de usuario

Vmac

Vmac VR70 Manual de usuario

Vmac

Vmac UNDERHOOD 40 Series Manual de usuario

Vmac

Vmac AIR INNOVATED H600009 Instrucciones de instalación

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Vmac VR70 Manual de usuario

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Vmac VR70 Manual de usuario

Vmac

Vmac VR70 Manual de usuario

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