
DEVILBISS
JGX-502 SPRAYGUNOPERATIONMANUAL SB-E-301-C
Description
TheJGX-502SprayGunisa conventionalairspray
gun,
patternedaftertheJGAseries,whosefunctions
aresimilartostandardairspraygunmodels.Thegun
isavailableinthreetypes:gravity
feed,
suction
feed,
andpressure
feed,
inordertocoverthewidestrange
ofapplications.
Withallareasofthefluidpassagesmadefromstain-
lesssteel,theJGX-502canbeusedwitha widerange
ofpaints,withtheonlyexceptionbeingthoseofa
highlycorrosiveand/orabrasivenature.Theuseof
suchmaterialswillrequirethoroughcleaningand
frequentpartreplacement.
AnyquestionsregardingtheoperationoftheJGX
SprayGunshouldbedirectedtousorourdistribu-tors
BEFOREuse.
TypesandSpecifications
TheJGXarespecifiedwhenorderingasfollows;
JGX-502 AircapNo.TipSize
<Example>JGX-502-143-FF-G
FeedType.
Thisrepresentsa gunwitha number143Aircap,a
SizeFFFluidTip,andsetupforGravityFeed.
Operations
Beforeusingthegun,theneedlepacking,whichis
shippedloosetoavoidbinding,shouldbeadjusted.
Thepackinggland(Part#7)shouldbegradually
screwedclockwisewhiletriggeringthegunuptothe
pointwheretheneedledoesnotsmoothlyreturnto
theclosed-position.Atthispointthepackinggland
shouldbeslightlyloosenedbyscrewingitincounter-
clockwisesothattheneedlemovesfreely.
Adjusttheatomizingairpressuretothelowestlevel
possibleandcommensuratewithproperatomization
qualitydesired,tominimizeoversprayandmaximize
painttransferefficiency.
Thespraygunshouldbeusedatalltimesperpen-
diculartothesurfacetobecoatedata distanceof
150-200mm.
Maintenance
Thegunshouldbecleanedandlubricateddailyto
maintainitsoptimumperformance.Cleanthepaint
passagesthoroughlybysprayingsolventsthroughthe
gunafteruse.
Thegunbodyshouldneverbesoakedinthesolvent
forcleaning.Exteriorsurfaceshouldonlybewiped
withsolventdampenedrags.
Theaircapsshouldbedetachedfromthegnuand
soakedinthesolvent.
Usetoothpickstoremoveanypaintbuildupfromthe
aircapholes.NEVERusemetalobjectstocleanthe
aircapsinordertoavoiddamagetothefineholes,
whichwillcausethespraypatterntobecomedis-
torted.
Adropoflubricantshouldbeappliedregularlytothe
triggerbearingstud(#25),thestemoftheairvalve
assembly(#21),andtheneedlepackinggland(#7).For
optimumresultsuseSSL-10SprayGunOil.
TheNeedleSpring(#11)andtheAirValveSpring(#22)
shouldbelightlygreased.Donotlubricateorgrease
excessivelyinordertoavoidcloggingintheair
passages.
ReplacementofParts
Awrench(JGX-34)isprovidedwiththegun.
Whenreplacingthefluidtips,ensurethattheFluid
NeedleAdjustmentScrewisremoved,andalsoen-
surethattheSpreaderValveisinthefullyopen
(counterclockwise)position.
WhenevertheFluidInletNipple(#23)ortheAirInlet
Nipple(#28)arereplaced,a sealantmaterialsuchas
Loctite242,shouldbeappliedtothethreadbefore
insertingitintothegunbody.Thesamesealantshould
alsobeusedonthebodythreadoftheSpreader
Valve(#13)andtheCheaterValve(#27).
Specifications
AirandFluidInletThreads:
Fluid:
AirInlet:
Weight:
Suction/PressureFeed
PF3/8Male,standard
PF1/4Male,Optional
PF1/4
Suction/PressureFeed 440g
AccessoryItems
•TLC-5551 LitreSuctionCup(withTeflon*Coated
InnerLining)
•KG-503-1400ccSideCup(GravityFeed)
•KG-503-1-T400ccSideCup(withTeflon*CoatedInner
Lining,
GravityFeed)
•KG-400400ccSideCupWithStand(GravityFeed)
•KG-400-T400ccSideCupWithStand(WithTeflon*
CoatedInnerLining,GravityFeed)
•KB-IIKB-5552 LitrePressureFeedRemoteCup
•KR-470-1700ccSuctionCupAssembly
•HD-5055 LitreGun& HoseCleaner
•JGX-101RepairKit
•SSL-10SprayGunLubricant.Sylicone-free,
Non-petroleumproduct
•HAF-507DisposableAirLineFilter
•Teflon,andDelrinareboththeregisteredmarksof
E.I.DuPontdeNemoursandCompany.