Graco PRO 301ST User manual

OWNER'S MANUAL 388-21 6
Rev. C
Thls manual contafns important Supersedes Rev. A
warnings and information.
READ AND RETAIN
FOR REFERENCE
and PCN C
ELECTRIC, 120 VAC
Pro 301st Airless Paint Sprayer
2750psi (190 bar) Maximum Working Pressure
Model 231 -202, Series C
Complete sprayer with hose, gun, RAC IV*
DripLess" Tip Guard and SwitchTip
Table M Contents
Warnings., ................... 2
Setup ........................ 8
Operation .................... 9
Startup,. .................... 11
Shutdown and Care .......... 13
Flushing .................... 14
Troubleshooting.. ............ 15
Repair ...................... 20
Technical Data 36
Parts 33
Graco Phone Numbers.. 36
Dimensions.. 36
Warranty .................... 36
........................
...............
................
......
NOTE: This is an example of the DANGER label on your sprayer. This label
is available in other languages, free of charge. See page 36 to order.
I
FIRE AND
EXPLOSION HAZARD HAZARD
I
SKIN INJECTION
cleanlng equlpment wlth flammable Ilq- Ll ulds can be Injected Into the body by hlgh pressure airless spray
result
In flre or exploslon. I or%aks - especlally hose leaks. I
U6e outdoors or in extreme1 well wntllated areaa. Ground equip.
trlggerlng of gun by always sefflng safety latch when not spraying.
body. Drak ail prf5sure
before removlng parts. Avoldlaccldental
ment, hoses, contalners ancroblecta being sprayed.
Keep
bod elear Of the Never *OP leaks with an Part Of the
Avoid all Ignition sourcas such a6 static electrici from plasUc
N~~~~ spray a tip
drop cloths, open flames such as pilot lights, hot
o r: Ject8 such e6
cigarettes, arcs from connectin or disconnecting powar cords or
In case Of accidental skln Inleftion, seek lmmedlate
turnlng light switches
on and 08.
"Surgical Treatment".
I Fallure to follow thls warnlng can result In death or serlous Injury. I Ekm to fol'ow thla can In amputat'on OT serious
I
I READ AND UNDERSTAND ALL lABELS AND INSTRUCTION MANUALS BEFORE USE
~ ~ ~ ~~~
THE OBRIEN CORPORATION, 450 E. Grand Avenue, So. San Francisco, CA 94080
@COPYRIGHT 1992, GRACO INC.

Observe All Warnings. Read and understand all instruction manuals before operating equipment.
High Pressure Spray Can Cause Serlous Injury. For Professional Use Only.
FLUID INJECTION HAZARD
General Safety
This equipment generatesvery high fluid pressure. Spray from
the gun, leaks or ruptured components can inject fluid through
yourskinandintoyourbodyandcauseextremelyseriousinjury,
including the need for amputation. Also, fluid injected or
spiashedintotheeyesorontheskincancauseseriousdamage.
Never point the spray gun at anyone or at any part of the body.
Never
put hand or fingers over the spray tip. Never try to “blow
bacV paint; this is Not an air spray system.
Alwayshavethetipguardinplaceonthespraygunwhenspray-
ing.
Always follow the Pressure Relief Procedure, below, before
cleaning or removing the spray tip or servicing any system
equipment.
Never
try to stop or deflect leaks with your hand or body.
each
use.
Besureequipmentsafetydevicesareoperatingproperlybefore
Medical Alert--Airless Spray Wounds
cal care at once. do not treat as a simple cut. Tell the doctor
Ifanyfluidappearstopenetrateyourskin,getemergencymedi-
exactly what fluid was injected.
Note
io Physlcian: Injection in the skin is a traumatic injury. It
isimportanttotreattheinjurysurgicaiiyassoonaspossib1e.Do
not delay treatment to research toxicity. Toxicity is a concern
withsomeexoticwatingsinjecteddirectlyintothebloodstream.
Consultation with a plastic surgeon or reconstructive hand sur-
geon may be advisable.
Spray
Gun Safety Devices
Be sure ail gun safety devices are operating roperly before
eachuse.Donotrernoveormodifyanypartoft!egun;thiscan
cause a malfunction and result in serious injury.
Safety Latch
Wheneveryoustopspraying,evenforamomen?,alwayssetthe
gun trigger safety in the closed or “safe” posltlon, making the
gun inoperative. Failure
to set the safety latch can result in acci-
dental triggering
of the gun.
Diffuser
Thegundiffuserbreaksupsprayandreducestheriskoffluidin-
jection when the tip is not installed. Check diffuser operation
regularly. Follow the Pressure Relief Procedure, below, then
remove the spray tip. Aim the gun into a metal pail, holding the
the gun.
If the fluid emitted is not diffused into an irregular
gunfirmiytothepail.Usingthelowestpossibiepressure,trigger
stream, replace the diffuser immediately.
Tip Guard
Alwayshavethetipguardinplaceonthespraygunwhilespray-
ing. The tip guard alerts you to the fluid injection hazard and
helpsreduce,butdoesnotprevent,theriskofaccidentailyplac-
ing your fingers or any part of your body close to the spray tip.
Aiwayshavethetriggerguardinplaceonthegunwhenspraying
Trigger Guard
to reduce the risk of accidentally triggering the gun if it is
dropped
or bumped.
Spray Tip Safety
spraytipclogswhilespraying, locktheguntriggersafetyimrne-
Useextremecautionwhencleaningorchangingspraytips.1fthe
diately. ALWAYS follow the Pressure Rellef Procedure and
then remove the spray tip
to clean it.
fully relieved and the gun trigger safety is locked.
NEVER wipe off build-up around the spray tip until pressure is
To reduce the risk of serious injury, including fluid injection,
Pressure Relief
Procedure 4. Unlock the gun trigger safety. Hold a metal part of the
splashing fluid or solvent in the eyes or on the skin, or injury
gun firmlyto the side
of a grounded metal pail, and trig
frommovingpartsorelechicshock,alwaysfollowthisproce- 5. Lock the oun trimer safetv.
ger the gun to relieve the pressure.
1. Lock the gun trigger safety.
2. Turn the ON/OFF switch to OFF.
3. Unplug the power supply cord.
If you suspect that the spray
tip or hose is completely
clogged, orthatpressure has not been fullyrelievedafterfol-
lowing the steps above, very slowly loosen the tip guard
ally, then loosen completely. Now clear the tip or hose.
retaining nut or hose coupling to relievethe pressure gradu-
2 308-216

EQUIPMENT MISUSE HAZARD -
General Safety
Any misuse of the spray equipment or accessories, such as This sprayer
can develop 2750psi(195 bar) Maximum Working
calsandfluids,orusingwornordamagedparts,cancausethem used are rated to withstand this pressure. Do not exceed the
overpressurizing. modifying parts, using incompatible chemi- Pressure. Be sure that all spray equipment and accessories
toruptureandresultinfluidinjection,splashtngintheeyesoron maximum working pressure of any component or accessory
the skin, or other serious injury, or fire, explosion or property used in the system.
damage.
NeveranerormodifyanYPartofthisequiPment;doingsocould Allchemicalsusedinthesprayermust echemicallycompatible
Fluid and Solvent Compatiblh
cause it to malfunction.
Checkallsprayequipmentregularlyandrepairorreplaceworn Consult your chemical supplier to ensure compatibility.
w'm the wetted parts shown
in theTechnicai Data on page 36.
or
damaged parts immediately.
Alwayswearprotectiveeyewear,gloves,clothingandrespirator logenated hydrocarbon Solvents or fluids containingsuch 501-
Do not use 1,1,1 -trichloroethane, methylene chloride, other ha-
a5 recommended by the fluid and solvent manufacturer. vents in this equipment, which contains aluminum andlor zinc
parts.Suchusecouldresultinaseriouschemicalreaction,with
thepossibilityofexpiosion,whichcouldcausedeath,seriousin-
jury and/or substantial property damage.
System Pressure
. Y
HOSE SAFETY
High pressure fluid in the hoses can be very dangerous. If the Handle and route hoses carefully.
Do not pull on hosesto move
hose develops a ieak, split or rupture due
to any kind of wear, equipment. Keep hoses clear of moving parts and hot surfaces
damage or misuse, the high pressure spray emitted from
it can ofthe pumpandgasengine.
Do not usefiuidsor solventswhich
cause e skin injection injury or other serious injury or property
are not compatible with the innertube and cover ofthe hose.
Do
Ail fluid hoses must have spring guards an both ends! The or below -40" F (-40' C).
damage. not expose Graco hose to temperatures above 180' F (82' C)
hose for cuts, leaks, abrasion, bulging cover, or damage or limits. Use
a iesistance meter in the appropriate range for your
movementofthehosecouplings.Ifanyoftheseconditionsexist,
hose tocheckthe resistance. If the resistance exceeds the rec-
replace the hose immediately.
Do nottry to recouple high pres- ommended limits, replace
it immediately. An ungrounded or
sure hose or mend
it with tape or any other device. A repaired poorly grounded hose can make your system hazardous. Also
hose cannot contain the high pressure fluid. read
FIRE OR EXPLOSION HAZARD.
~~ ~ ~~ ~~
~"I ~ ~
FIRE OR EXPLOSION HAZARD
Staticelectricityiscreated bythe flow of fluidthroughthe pump
6. All solvent pails used when flushing, according to local
and hose.
If every part of the spray equipment is not properly code. Use only metal pails, which are conductive.
Do not
grounded, sparking may occur, and the system may become
placethepailonanon-conductivesurface,suchaspaper
hazardous. Soarkino mav also occur when plugging in or un- or cardboard, which interrupts the grounding continuity.
plugging e power
;UPP& cord or using a gasoline engine. 7. Tomaintain groundingcontinuitywhen flushingorrefieving
Sparks can ignite fumes from solvents and the fluid being
sprayed, dust particles and other flammable substances, pressure, always hold
a metal part of the gun firmly to the
whether vou are soravino indoors or outdoors. and can cause side of a grounded metal pail, then trigger the gun.
. " -
a fire or explosion and s&ious injury and property damage.
Flushing Safety
..... ~~~.~ ,.~ .~.~~,
Grounding
To reduce the risk of static sparking, around the Sprayer and all
... ...., __ _. .- .. ~~
-~ r- -
possible fluid pressure during flushing.
othersprayequipmentusedorloc~t~dinthesprayarea.Check
your localelectricalcodefordetailed grounding instructionsfor
your area and type of equipment. Be sure
to ground all of this
spray equipment:
1, Sprayer: connect a ground wire and clamp (supplied) to a
true earth ground.
2. Fluid hoses: use only grounded hoses with a maximum of
500ft1150meter~combinedhoselenathtoensurearound-
- VOVlMG PARTS HAZARD -
Moving parts can pinch or amputate your fingers or other body
parts. KEEP CLEAR of moving parts when starting or operating
the sprayer. Follow the Pressure Relief Procedure on page
2
before checking or servicing any pati of the sprayer, to prevent
it from starting accidentally.
ing continuity. See Hose Groundlng Continuity.- - IMPORTANT -
3. Spraygun:obtaingroundingthroughconnectiontoaprop-
4. Object being sprayed: according to local code.
5. Fluid supply container: according to local code. struction Standards, Part 1926 - should be consulted.
-. -. . - . . . - -. - -
erly grounded fluid hose and sprayer. UnitedStatesGovernmentsafetystandardshavebeenadopted
underthe0ccupationalSafetyandHealthAct.Thesestandards
- particularly the General Standards, Part 1910, and the Con-

Rbservb exclusivement I'usage professlonnel. Observer toutes les consignes de sbcuritb.
La pulvbrisatlon
A haute presslon'peut causer des blessures trbs graves.
Bien
lire et bien comprendre tous les manuels d'lnstructions avant d'utiliser le matbriel.
RISQUES D'INJECTIOM
Cet appareil produit un fluide a tres haute pression. Le fluide
Consignes generales de sbcuritb
fuites ou de ruptures peut p4netrersous la peau ou A I'interieur
pulverise par le pistolet ou le fluide sous pression provenant de
du corps et entrainer des blessurestres graves, voir mhe une
amputation. Mbmesans &re sous pression. lefluideeclabous-
santouentrantdanslesyeuxpeutaussientrainerdesblessures
graves.
Ne Jamais pointer le pistolet vers quelqu'un ou vers une partie
quelconqueducorps.NeJamaismettrelamain0ulesdoigtssur
I'ajutage du pulv6risateur. Ne Jamais essayer de "refouler" la
peinture. Cet appareii N'est
Pasuncompresseurpneumatique.
Toujoursgarderlaprotectiondel'ajutageenplacesurlepistolet
pendant la pulverisation.
Toujours ObSeNer la March
a Sulvre pour D6tendre 18 Pres-
don donnee plus loin, avant de nettoyer ou d'enleverl'ajutage
du pulverisateur, ou d'effectuer un travail quelconque sur une
partie de I'appareil.
ou le corps.
Ne Jamais essayerd'arrdter ou de devierles fuites avec la main
Avant chaque utilisation, bien s'assurer que les dispositis de
skurite fonctionnent correctement.
Solns medicaux
En cas de pen6tration de fluide sous la peau: Demander
soigner cette blessure comme une simple coupure.
lmrnedlaternent des soh medlcaux d'urgence. Ne pas
Avis au medecln: La penetration des fluides
sous la peau est
un traurnatisrne.
I1 est important de waiter chiruqicale-
ment cetle blesiura imm6diatement. Ne pas retarder le
traitement pour effectuer des recherches sur la toxiClt6.
Certains rev&tements exotiques
sont dangereusement
toxiques quand ils
sont inject& directernent dans le sang.
I1 est souhaitable de consulter un chirurgien esthbtique ou
un ChiNrCIien sobcialisb dans la reconstruction des mains.
Avant chaque utiiisation, bien s'assure que tous les dispositifs
Dlspositifs de sbcuritb du pistolet
de securith du pistolet fonctionnent correctement. Ne pas en-
lever ni modifier une partie quelconque du pistolet: ceci
risquerait dentrainer
un mauvars fonctionnement et des bles-
sures graves.
Verrou de securitd
A chaque fois que l'on s'arrdte de pulv6riser, rndme s'il s'agit
d'un court instant, toujours mettre le verrou de securite du pis-
tolet sur la position "fermbe" ou "securit6" ("safe") pour
emp~cherlepistoletdefonctionner.Sileverroudesecuriten'est
pas mis, le pistolet peut se declencher accidentellement.
Diffuser
d'injectionaccidentellequandI'ajutagen'estpasenplace.VBrif-
LediffuseurdupistoletsertBdiviserlejetet21reduirelesrisques
verification, dbtendre la pression en ObSeNant la Marche b
ier le fonctionnement du diffuseur rbgulierement. Pour cette
lever I'ajutage du pulv6risateur. Pointer le pistolet dans un seau
Sulvre pour Detendre
la Presslon donnee plus loin puis en-
en metal, en le rnaintenant fermement contre le seau. Puis, en
utilisant la pression la plus faible possible, appuyer sur
la
gachette du pistolet. Si le fluide projete n'est pas diffuse sous
forme de jet irregulier, remplacer immediaternent le diffuseur.
Protection de I'ajutage
Toujoursmaintenirlaprotectiondel'ajutageenplacesurlepis-
toletdupulv6risateurpendantlapulverisation. Laprotectionde
I'ajutageattire I'attention sur
les risquesd'injectionet contribue
Breduire,maisn'evitepaslerisque,quelesdoigtsouunepartie
quelconque du corps ne passent accidenteliement a proximite
immediate de I'ajutage du pulverisateur.
Consignes de shcurlte concernant I'ajutage
du
Faire extremement attention a lloccasion du nettoyage ou du
pulverlsateur
remplacement des ajutages du pulvdrisateur. Si I'ajutage se
bouche pendant la pulv&isation, mettreimmediaternent lever-
Sulvre pour Detendre la Presslon puis enlever I'ajutage du
rou de sdcurite du pistolet. Toujours bien obsmer la Marche
a
pulverisateur pour le nettoyer.
NeJamaisessuyercequis'estaccumuleautourdeI'ajutagec
pulverisateur avant que la pression ne soit completeme1
tombbe et aue le verrou de skurite du oistolet ne soitenoaa'
".
blessures per projection de fluide ou celles causbes par de
Bclaboussuresdanslesyeuxousurlapeau,pardespiecesen
mouvement,toujoursbienobservecettemarcheasuivrecha- 5. Engager le VerrOU de S6curite du Pistolet.
quefoisqueI'onarrdtelepulv8risateur,Bl'occasiondelaverifi- 6. Ouvrir lasoupape de skurite et la laisser ouverte jusqu'a
cation,du6galeoudunettoyagedusyst&meoulorsduchan-
gement des ajutages. teur.
ce que
l'on soit prdt a se servir de nouveau du pulvbrisa-
SiI'on soupconne que le
tuyau ou I'ajutage est cornpl&tement
1. Engager le verrou de securite du pistolet. bouch6
ou que la pression n 'a pas Btb cornpleternent liberee
apres avoir procede aux operations ci-dessus, desserrer
2. Mettre le levler d'arrit du moteur sur ARRET (OFF).
4 308-216

- RISQUES EM CAS DE MAUVAISE UTILISATION DU MATERIAL -
Conslgnes gbnbrales de securltk
Toute utilisation anormale de I'appareil de pulverisation ou des Ce pulverisateur peut produire une Pression Maximum De Tra-
accessoiresromme,parexemple,lamisesousunepressionex- mi 195 bar (2750lb/po2). S'assurer que tous les elements du
chimiques et
de matiires incompatibles et I'utilisation de pieces pression maximum de travail de ce pulverisateur. NE PAS
cessive,
les modifications de pieces, I'utilisation de produits pulverisateur et ses accessoires sont conqus pour resister B la
ruptures de pieces et entrainer une injection de liquide ou ou accessoires utilises avec cet appareil.
usees ou abides
peut causer des degats B I'appareil ou des depasserlapressionmaximumdetravaild'aucundeselements
d'autres degits.
d'autrbs blessures serieuses. un incendie, une explosi6n ou
Compatlblllte chlmlque des corps
Eien s'assurer que tous les corps des solvants Utiliies sont
Ne Jamais alterer ou modifier une piece de cet appareil; ceci
chimiquementcompatiblesaveclespartiesmouilleesindiquees
risquerait d'entrainer son mauvals fonctionnement. dans les Technical Data, a page 36. Toujours lire soigneuse-
Verifier rbgulihrement tout I'appareil de pulverisation et ses
mentlesdocumentsetbrochuresdufabricantdesfluidesetsol-
equipementsetreparerouremplacerimmediatementlespieces vants utilises avant de s'en servir dans ce pulverisateur.
usees ou abimbes.
Presslon
- MESURES DE SECURITE CONCERNANT LES TUYAUX FLEXIBLES -
Lefluideahautepressioncirculantdanslestuyauxpeut~tretres
Manipulerlestuyauxavecprecautionetchoisirsoigneusement
dangereux. Encasdefuite sur letuyau, defissure, dechirureou leur chemin. Ne pas deplacer lefluide en tirant sur le tuyau. Ne
tion, lesprojectionsdefluide haute pression quienproviennent avec I'enveloppe interieure ou exterieure du tuyau. NE PAS ex-
ruptureBlasuitedel'usure,ded~gitsoud'unemauvaiseutilisa-
pasutiliserdefiuidesoudesolvantsquinesontpascompatibles
peuvententrainerdesblessuresgravesparpen~trationsousla
poser le tuyau ;1 des temperatures superieures A 82°C
peau ou par contact, ainsi que des ddgats materiels.
(180°F) ou inferieures a -4OOC (-40'F).
Tousles tuyauxtlexlbles doivent avolr des
ressorts splrale Contlnulte de la mlse la terre des tuyaux
gev~ter~a~orma~on~ep~~ures,debouc~e~oude~~~d~~u~~e~
tiellepourmaintenirlamisealaterredeI'ensembledevaporisa-
deprotectionauxboutslLesspiralesdeprotectioncontribuent UnebonnecontinuitedelamiseBlaterredestuyauxestessen-
tuyauxquipourraiententrainerlarupturedutuyauBI'endroitdu tion.Verifiezlaresistanceelectriquedevostuyauxafluideseta
raccord ou B son voisinage. air, au moins une fois par semaine. Si votre tuyau ne comporte
pas d'etiquette qui precise la resistance electrique maximurn,
fluide
SOUS pression peut faire sau!er un raccord desserre ou avoir les limites de resistance maximum. UtiliSeZ un m&e de
Serrerfermementtouslesraccordsavantchaqueutilisation.Le
prenezcontactaveclefournisseurdetuyauxoulafabricantpour
produire un jet a haute pression s'echappant par le raccord. resistance de la gamme aPPrOPri6e Pour VotretuYau etverifiez
Ne Jamais utiiiser un tuyau endommage. Ne Pas essayer de remplacez le tuyau immediatement. Un tuyau sans mise
a la
la resistance. Si celle-ci depasse les limites recommandees.
tuyau avec du ruban adhesif ou par tout autre moyen. Un tuyau risques pour votre systeme. Lisez aussi LES RISQUES DIN-
refaire le raccord d'un tuyau haute pression ni de reparer le terre ou avec une mise
A la terre incorrecte peut entrainer des
repar6 ne peut pas resister au fiuide
SOUS pression. CENDIE OU D'EXPLOSI6N ci-dessus.
RISQUES D'INCENDIE OU DEXPLOSIOM -
De IUlectricit6 statique est produite par le passage du fluide B 2. Tuyaux fiexbles: Afin d'assurer la continuite de la mise a la
grande vitesse dans
la pompe et dans les tuyaux. Si toutes les
pieces de I'appareil de puiverisation ne Sont pas convenable-
terre, n'utiliser que des tuyaux comportant une mise
a la
men! relies B la masse ou B laterre, des 6tincelles peuvent se
terre et ayant une longueur maximum combinee de
150 m
(1 500 pieds). Se reporter egalement au paragraphe Contl-
produire et I'appareil risque d'Qre dangereux. Des etincelles
nuke du clrcult de mlse B la terre des tuyaux.
peuventQgalementseproduireBI'occasiondubranchementou 3. Pistolet: RBaliser la mise B la terre en le raccordant Bun
sontsuffisantesDourallumerlesvapeursdesolvantsetlefluide
du debranchement du cord6n d'alimentation. Les 6tincelles tuyau flexible et B un pulverisateur dejje convenablement
relies a la terre.
pu~verise, les fines particules de poussiehre ainsi que d'autres
4. Recipient ~a//mentation: observer le code ou les
ou uneexplosion, ainsi que des blessures graveset des degits
substances inflammables, et elles peuvent causer un incendie mentations locales.
trouvant
B au moins 6 m (20 pieds) de I'appareil et de I'endroit
materiels, ~~~j~~~~ brancherle pulv&isateurdans une prisese 5. Wets, materid 00 suhces rewant la pukdrisafion: ob-
server
le code ou les rbglementations locales.
oh se fait la pulverisation. 6. Tousles seaux de solvants utilisbs pour le rincage: observer
S'ilseproduitdesetincellesd'electricitestatique,ousivousres-
le code ou les reglementations locales. N'utiliser que des
sentezlamoindred~charge,arr~tezlmmedlatementlapulv~
saux m6talliques conducteurs de I'6lectricit6. Ne pas mettle
rlsatlon. Verifiezque lesystemeentierest bien mis alaterre. Ne le seau sur une surface non conductrice comme sur du
vousservezpasdusystemeavantqueleproblemesoitidentifie
papier ou du carton car cela interromprait la continuite de
.. la mise a la terre.
et corrigd. 7. Pour consewer
la continuit6 de la mise ii la tene quand on
Mise h la Perre ou B la masse rince le materiel ou quand on libere la pression, toujours
Pour reduire les risques de production d'4tincelles d'6lectricitb maintenir une partie mdtallique du pistolet fermement ap-
statiaue.
le oulverisateur et tous les Bauioements utilises ou se puyb contre le c6te dun seau en metal puis appuyer sur
trouvant dans la zone de pulv6risation doivent &re relies la
terre ou
ia masse. Pour connaitre le detail des instructions de
Consulter le code ou les reglementations electriques locales.
miseBlaterredanslaregionetletypeparticulierd'equipement,
sont bien relies B la terre:
S'Assurer que tous Ies huipements de pulverisation suivants
1. Pulverisateur: Brancher le cord6n d'alimentation ou la ral-
longe qui doivent &e equip& d'une prise B 3 fiches en
a la terre. Ne pas utiliser d'adaptateur. Toutes les rallonges
bon etat, dans une prise de courant convenablement mise
doivent avoir
3 fils et 6tre prevues pour 15 amperes.
,~ ~, ~. ,
ia detente du pistolet.
Mesures de
skurite concernant le rlncage
Pourreduirelesrisquesdeblessuresparpenetrationdelapeau
etlesrisquesd~sauxetincellesd'electricitestatiqueouauxecla-
boussures, observer IamarcheBsuivrepour le rincage donnee
B la page 14 de ce manuel. Observer la "Marche Suivre pour
pukerisateur avant
le rincage. Maintenir une partie m6tallique
Detendre la Pression" donnee
A la 4 en enlever I'ajvtage du
du pistolet fermement appuyee contre le cat6 d'un seau en
cage.
m~taletutiliserlapressionlaplusfaiblepossiblependantlerin-
308-216 5

El rociado a alta presi6n puede causar graves lesiones. Solo para us0 profeslonal. Respete 10s avisos de
advertencia. Lea y entienda todo el manual de Instrucci6nes antes de manejar el equipo.
- PELIGRO DE IMYECCION DE FLUID0
Seguridad general
Esteequipogeneraunfluidoaunapresi6nmuyalta.Elrociado
delapistola,losescapesdefluidooroturasdeloscomponentes
pueden inyectar fluido en la piel y el cuerpo y causar lesiones
amputaci6n.Tambien,elfluidoinyectadoosalpicadoenlosojos
extremadamente graves, incluyendo a veces la necesidad de
puede causar graves daiios.
Nunca apuntar la pistola hacia alguien
o alguna parte del
cuerpo. Nunca colocar la mano
o 10s dedos encima de la bo-
quilla.Nuncatratarde"hacerretornar1apintura";estenoesun
sistema de rociado de aire.
Siempre tener colocado el protector de la boquilla en la pis-
tolamientras se esta pulverizando.
Siempreseguirelprocedimientodedescargadepresion,dado
mhsabjo, antes de limpiar o sacar la boquilla o de dar servicioa
cualiquier equipo del sistema.
cuerpo.
Nunca tratar de parar
o desviar 10s escapes con la mano o el
Asegurarquetodoslosaparatosdeseguridaddelequipoestan
funcionando bien antes de cada uso.
Tratamiento
medico
Siparecieraqueunpocodefluidopenetr6lapiel,conseguirTra-
tamlento medico deurgencladelnmediato. notratarla her-
ida como un simple corte. Decir al medico exactamente cua
fluido fue.
Aviso a/ m6dico: Si se //ega a inyectar este fluido en la pie/ se
causa una lesi6n traumdtica.
Es importante tratar
guirtirgicamente la lesi6n a la brevedad posible. No
demomr el tratamiento para investigar la toxicidad. La
toxicidad es a/go de suma importancia en algunas pin-
turas exdticas cuando se invectan directamente a/ torrente
r
Procedimiento de descarga de presl6n
Parareducirel riesgode sufrirgraves lesiones corporales. in-
cluyendo inyeccion
o lesiones causadas por pie& en
procedimientoal
apagar lamaquina
pulverizadora, al revisar
movimiento
o
choque electrico, siempre seguir este
0 dar servicio acualquier parte del sistema de pulverization,
al instalar, limpiaro cambiar ias boquillas, y cadavezque se
deja de pulverizar.
1. Enganchar el pestillo de la pistola.
2. Mover el interruptor electrico (ON/OFF) a la posicion
OFF (apagado).
3. Desenchufar el cordon electrico. 1
Asegurarquetodoslosaparatosprotectoresdelapistolaesth
Aparatos de seguridad de la pistola pulveriradora
funcionando bien antes de cada uso. No sacar ni modificar
ningljnapieza de lapistolapues podriacausar el malfunciona-
mientodelamismaconlasconsiguienteslesionespersonales.
Pestillo de seguridad
Cada vez que se deje de pulverizar, aunque sea por un breve
momento, siempre colocar el pestlllo de seguridad en la posi-
puede llevar al disparo imprevisto de la pistola.
ci6n "cerrada"
lo que deja la pistola inoperante. El no hacerlo
Difusor
El difusor de la pistola dispersa el chorro pulverizado y reduce
el riesgo de inyeccion cuando no est& instalada la boquilla.
Revisarcon regularidad elfuncionamiento del difusor. Seguirel
despubs sacar la boquilla. Apuntar la pistola a un balde metali-
procedimiento de descarga de preslbn, dado
mas abajo. y
co,sosteni~ndolabienfirmecon~ael.U~lizandolapresi~nmas
bajo posible, disparar la pistola. Si el fluido emitido no sale dis-
persoenunchorroirregular,reemplazardeinmediatoeldifusor.
Protector de /a boquilla
Siempretenerel protectorde la boquillacolocadoen lapistola
contra el peligro de inyeccion y ayuda a reducir, per0 no evita,
mientras seesta pulverizando. Este protector llama laatendon
lacolocacionaccidentaldelosdedosocualquierotrapa~edel
cuerpo cerca de la boquilla.
Seguridad de la boquilla pulverizadora
Tenermuchocuidadoallimpiarocambiarlasboq.Sillega-
delapistoladeinmediato.Siempreseguirelprocedlmlentode
raaobstruirsemientrasestepulverizando,engancharelpestillo
descarga de presl6n y despues sacar la boquilla para lim-
piarla.
sanguineo.
Sir4 convenientkconsultara un especialistaen quillaantesdequesehayadescargadoporcompletolapresion
Nunca limpiar la acumulacion de plntura alrededor de la bo-
cirugia plistica
o reconsfructiva de /as manos. y el pestillo este enganchado.
4
4. Desenganchar el pestillo de la pistola. Sujetar una parte
metelica de la pistola bien firme contra un balde de
5. Enganchar el pestilio de la pistola.
metal, y disparar la pistola para descargar la presion.
6. Abrir la valvula de presi6n. Dejar la valvula de alivio de
presi6n abiarta hasta que se
est8 nuevamente list0 para
Si se sospecha que la boquilla
o la manguera esta com-
pulverizar.
pletamente obstruida,
o que no se ha descargado por com-
anterior,aflojarmuylentamentelatuercaderetenci6ndelpro-
pleto la presion despues de haber seguido el procedimiento
tector de la boquilla
o acoplamiento de la punta de la man-
guera y descargar gradualmente la presion, despues,
aflojarlo por completo. Luego, despejar la boquilla
o la man-
guera.
6 308-216

Cualquier mal us0 del equipo pulverizador o 10s acCesorioS, tal
Seguridad general
como sobre presurizacih, modification de piezas, us0 de
mat~rialesyproductosquimicosincompatibles,outilizaci6nde
pie& datiadas o desgastadas, puede hacen que se rompan y
causenlainyecci6ndefluidouotrasiesionescorporalesgraves,
incendio, explosi6n o dation a la propiedad.
Nunca alterar
o modificar ningicna pieza de este equipo: el
hacerlo podria causar una averia.
Presi6n del sistema
fresi6n De Trabajo Mdxima. Asegurar que todo el equipo pul-
estb pulverizadora puede desarrollar 195 barias
(2750 psi) De
verizadorysusaccesoriostienenlacapacidadparaaguantarla
presi6n maxima de trabajo de est& pulverizadora NO exceder
cesorio de este sistema.
la presi6n mAxima de trabajo de ningtjn componente
o ac-
Compatibilidad de fluido
Siempreleerlasinstrucci6nesdelfabricantedelfluidoysolvente
antes de usarlos en est6 pulverizadora, dadas en la pagina 36.
Revisar con regularidad el equipo pulverizador y reparar o respiradero, tal como recomiendan ios fabricantes del fluido y
Siempre usar galas, guantes, vestimetas protectora y un~
reemplazar de inmediato las piezas datiadas
0 desgastadas. del solvente.
.~
- SEGURIDAD EM EL US0 DE US MAMGUERAS -
Elfluidoqueescapaaaltapresi6nporlasmangueraspuedeser
Manejarypasarcuidadosamentelasmangueras.Notirarde1as
muy peligroso. Si en la manguerase desarrolla un escape, una mangueras para mover el equipo. No usar fluidos
o solventes
rotura
o rajadura debldo a cualquier tip0 de desgaste, datio o
que Sean incompatibles con el tub0 interno y la cubierta dela
maltrato. el chorro a alta presibn emitido por alii puede causar manguera. No exponer
las mangueras a temperaturas sobre
una lesion por inyeccion
u otras lesiones corporales graves o
82- c (1800 R 0 baio -400 c (-40" R.
datios a la propiedad.
ITodaslasmanguerasparafluldostlenenquetenerguardas
de resorte en ambos extremosl Estas protegen las man- manguera
guerascontradoblecesore~orce~urasenlosacop~amiento~o
Lacontinuidaddelcircuitodepuestaatierraapropiadoesesen-
cercade ellos, los quepodrian traducirse en rOturaS de la man-
cialparamantenerconectadoatierraelsistemapulverizador.Es
"llP?P
indispensable revisar la resistencia electrica mAxima de las
.
Continuidad del circuit0 de puesth a tierra de la
yv","
fluido a alta presi6n puede desalojar un acoplamiento suelto o
Antes de usarlas, Apretar bien firmes todas las conexiones. El
dejar que por
el escape un chorro a alta presion.
Nuncausarunamangueraqueestadatiada.Siempre,revisarla
en buscade cortaduras, escapes, abrasion, cubierlaabultada,
o acoplamientos sueltos o dahados. Si llegara a encontrarse
cualquiera de estbs condiciones, reemplazar de inmediato la
manguerasdeaireydefluidoporlomenosunavezalasemana.
Si la manguera no tiene una etiqueta en la cual se especifica la
fabricantedelamangueraparalainformacibnsobreloslimites
resistencia electrica, ponerse en contact0 con el proveedor o
de resistencia. Usar un metro de resistencia en la gama
apropiade para comprobar la resistencia; si excede
10s limites
recomendados,
reemplazarladeinmediato. Esmuyarriesgado
tener una manouera sin Duesth a tierra
o con la ouesta a tierra
manguera. NOintentarracoplar
unamangueradealtapresibn en malas conkcidnes. 'Leer tambien la informacibn~sobre
o enmendarla con cinta adhesiva u OtrO material similar. Una RIESGO DE INCENDIO 0 EXPLOSION. mas arriba.
manguera que ha sido remendada no aguante el fluido a alta
presi6n.
- PELIGRO DE INCENDIQ 0 EXPLOSION -
.,
El flujo a aka velocidad del fluido al pasar por la bomba y man-
guera crea electricidad estatica. Si todas las partes del equipo
pulverizador no tienen buena tierra, pueden ocurrir chispas,
convirtiendo al sistema en algo peligroso. Tambien, pueden
producirse chispasaenchufar
o desenchufarel cordon electri-
co. Est& chispaspueden
inflamarlosvaporesdelossolventes
yelchorrodefluidopulverizado,particulasdepolvoyotrassus-
tanciasinflamables,seaalairelibreobajotecho,loquepodria
causarunaexplosionoincendioygraveslesionescorporalesy
dafios al a propiedad. Enchufar siempre la pulverizadora a un
tomacorrientequeseencuentreaporlomenos6m(ZOpies)de
la maquina y del area que se va a rociar.
choqueelectricomientrasseusaelequipo,de)ardepulverlzar
Si ocurre una chispade electricidad estatica o incluso un ligero
de Inmediato. Revisar todo el sistema en busca de una tierra
y solucihado el problema.
apropiada.Nousardenuevoe1sistemahastahaberidentificado
Peusta a tierra
Para reducir el reisgo de chispas estaticas, conectar a tierra la
pulverisadora y todo el otro equipo de pulverisar que se use 0
se encuentre en el lugar que se va a rociar. Consultar el codigo
electric0 delalocaiidad para las
instruccionessobrelasconex-
de conectar a tierra todo este equipo pulverisador:
iones a tierra exigidas para la zona
y tip0 de equipo. Asegurar
1. Pufverizadora: enchufar el cordbn electrico, o cable exten-
sor, cada uno un enchuf de trhs patas en buen estado, a
un tomacorreinte con puesat a tierra aporpiado. No usar un
trhs hilos y una capacidad de 15 amperios.
adaptador. Totos
10s cables extensores tienen que tener
2. Mangueras para fluidos: usar solamente mangueras con
puesta a tierra de una longitud combinada de 150
m (500
pies), para asequrar buena continuidad a tierra. Referirse
tambien al parrafo sobre continuidad a tierra de la
manugeura.
3. Pistola: hace la puesth a tierra conectandola a una man-
guera de fluido y pulverizadora bien conectadas a tierra.
4. Suministrar un fecipiente: de acuerdo al codigo de la
localidad.
5. Objeto que se estd rociando: de conformidad con el
codigo local.
6. Todos /os baldes de solvente usados durante el lavado. de
de metal, que Sean conductivos. no colocar el balde en
conformidad
con el codigo local. Usar solamente baldes
interumpe la continuidad a tierra.
una superficie no conductiva,
como papel o canon, que
7. Para mantenar la continuidad a tierra durante el lavado o
descarga de presion, siempre apoyar una parte metaiica
de la pistola bien firme contra el costado del balde
de
metal, despues apretar el gatillo.
Seguridad durante el lavado
Para reducir el riesgo de que se inyecte o salpique fluido en la
siempre seguir las Instrucciones Para
El Lavado. dadas en la
piel,
o que ocurra una descarga de electricidad estatica,
pbgina.14 Seguir el procedlmlento de descarga de presibn
en la pigna
6, y quita la boquilla rociadora antes de lava,:
Apoyarunapartemetalicadelapistolabienfirmecontraelcos-
tadodeunbaldedemetalyusarlepresi6nmasbajaposiblede
fluido durante el lavado.
308-216 7

Setup
A 1/4 npsm(m) fluid outlet
A DO not install any shutoff device here
A .Rotate clockwise to Increase pressure
A Shown in closed or spray position
A Fill 1/3 full with TSL
74.
Fig.
32
r
WARNING
sure the hoses are electrically conductive, that the
If you supply your own hoses and spray gun, be
at least
2750psi (195 bar) Working Pressure. This
gun has a tip guard, and that each part is rated for
is to reduce the risk of serious injury caused by
static sparking, fluid injection or over-pressuriza-
tion and rupture
of the hose or gun.
CAUTION
To avoid damaging the pressure control, which
may result
in poor equipment performance and
component damage, follow these precautions:
1. Always use nylon spray hose at least 50 ft.
(15 m) long.
2. Never use a wire braid hose as it is too rigid to
act as a pulsation dampener.
3. Never install any shutoff device between the
pump and the hose. See Fig.
1.
1. Connect the hose (74) and gun (67) and screw
it onto the outlet nipple
(28). Don't use thread
sealant, and don't install the spray tip yet1
2. Fill the wet-cup (102). Pry off the wet-cup seal.
Fill the cup 1/3 full with Graco Throat Seal Liquid
(TSL), supplied. Install the wet-cup seal.
3.
Plug in the sprayer. Be sure the ON/OFF switch
(52) is OFF. Plug the cord into a grounded outlet
at least away from the spray area.
4. Check the electrical service. Be sure it is 120 V,
60 HzAC, 15 Amp (minimum). Use a properly
grounded outlet.
Do not remove the third
(grounding) prong
of the power supply cord, and
do not use an adapter.
Use a 3-wire, minimum
12 ga (16 AWG), 15 amp
extension cord up to
150 R. (45 m) long. Longer
lengths affect sprayer performance.
8 308-216

Setup
5. Ground the sprayer and spray system.
WARNING
To reduce the risk of static sparking, ground the
pump
and all other equipment used or located in the
tailed grounding instructions for your area and type
spray area. Check your local electrical code for de-
of equipment. Ground all of this equipment.
I I
a. Sprayer: plug into a properly grounded outlet.
Do not use an adapter. Extension cords must
have three wires and be rated for at least
15
amps.
b.
Fluid hoses: use only grounded hoses with a
maximum of
500 ft (150 m) combined hose
length
to ensure grounding continuity. See
Hose Grounding Continulty.
c. Spraygun: obtain grounding through connec-
tion to a properly grounded fluid hose and
sprayer.
d. Object being sprayed: according to local code.
e. Fiuid supply container: according to local code,
f. A// solvent pails used when flushing, accord-
are conductive.
Do not place the pail on a
ing
to local code. Use only metal pails, which
non-conductive surface, such as paper or
cardboard, which interrupts the grounding
continuity.
g.
To maintain grounding Continuity when fiush-
ing or relieving pressure, always hold a metal
pari
of the gun firmly to the side of a
grounded metal pail, then trigger the gun.
6.' Flush the pump to remove the oil which was left
page 14.
in to protect pump parts after factory testing. See
7. Prepare the paint according to the manufactur-
Stir the paint
to mix pigments. Strain the paint
er's recommendations. Remove any paint skin.
through a fine nylon mesh bag (available at most
paint dealers) to remove particles that could clog
the gun filter or spray tip. This is an important
step toward trouble-free paint spraying.
Operation
How to use the gun trigger safety.
When locked, the gun trigger safety prevents the gun
from accidental triggering. See Fig.
2.
WARNING
If the gun still sprays when the gun trigger safety
is locked, adjust the gun. See manual
307-614,
supplied.
A Locked
How to use the pressure drain valve.
from the
pump and to help prime the pump. If the
Use the
pressure drain valve
to relieve fluid pressure
valve
senses an over pressure condition, it opens au-
tomatically
to relieve fluid pressure. If this happens,
stop spraying immediately, shut
off and unplug the
sprayer. Determine
the cause of the problem and cor-
rect it before operating the sprayer again. Refer also
to the Troubleshooting, page 15. See Fig. 3.
A Open or drain, position
A Closed, or spray position jj (Ii
Fig. 3 W W825A
308-216 9

Operation
How to use the pressure control.
The pressure control controls the motor operation so
the sprayer maintains constant fluid pressure at the
pump outlet. Turn the pressure control knob fully
the knob clockwise to increase
pressure.
See Fig. 4.
counterclockwise to obtain the
minimum setting. Turn
Fig.
How to use the RAC IV tip guard.
WARNING
To reduce the risk of serious injury from from fluid
injection:
NEVER operate the spray gun with the tip guard
removed.
DO NOT hold your hand, body, or a rag in front of
the spray tip when cleaning or checking a clogged
tip. Always point the gun toward the ground or
into a pail when checking to see if the tip is clear.
DO NOT try to "blow back" paint; this is NOT an
air spray sprayer.
The tip guard alerts you to the risk and helps prevent
placing any part of the body close to the spray tip.
The tip guard also adjusts the vertical or horizontal
spray pattern. See page
12. The tip guard holds a
reversing spray tip. The tip
is in the spraying position
when the tip handle points forward. See Fig.
5.
Clean the front of the tip frequently during the day's
operation. First, follow the Pressure Relief Proce-
dure on page 11.
WARNING
To reduce the risk of serlous injury, follow the
Pressure Relief Procedure Warning on page 11
before doing this procedure. Unplug the sprayer1
Tip handle shown In
Fig. 5
How to remove a tip clog.
1. Release the gun trigger. Lock the safety latch. Ro-
tate the RAC IV tip handle 180'. See Fig. 5.
2. Unlock the safety latch. Trigger the gun into a pail
or onto the ground to remove the clog.
3. Lockthe safety latch. Rotate the tip handle to the
spraying position.
4. If the tip is still clogged, lock the safety latch, shut
off and unplug the sprayer, and open the pres-
sure drain valve to relieve pressure. Clean the
spray tip as shown in manual
307-848, supplied.
10 308-216

Startup
Pressure Relief Procedure.
WARNING
To reduce the risk of serious injury, including fluid
the eyes or on the skin, moving parts or electric
injection, injury from splashing
fluid or solvent in
shock, follow this procedure when shutting off the
sprayer; checking or servicing the spray system;
installing, cleaning or changing spray tips; and
whenever you stop spraying.
1. Lock the gun trigger safety.
2. Turn the ON/OFF switch to OFF.
3. Unplug the power supply cord.
4. Unlock the gun trigger safety. Hold a metal part of
the
gun to relieve pressure.
the gun firmly to a grounded metal pail. Trigger
5. Lock the gun trigger safety.
6. Open the pressure drain valve, having a container
drain valve open until you are ready to spray
ready to catch the drainage. Leave the pressure
again.
li you suspect that the spray tip or hose is completely
clogged,
or that pressure has not been ful/y relieved
the the tip guard retaining
nut or hose coupling to re-
affer following the steps above, VERY SLOWLY loosen
lieve pressure gradually, then loosen completely.
Startup Procedure.
help ensure the sprayer is ready to operate and that
Use this procedure each time you start the sprayer to
you start
it safely.
NOTE: If this is a first-time startup, flush the sprayer.
See page
14.
NOTE: Refer to Fig. 1 and the other figures refer-
enced in the text as you start the sprayer.
1. Open the pressure drain valve (42).
2. Don’t Install the spray tip until the pump is
primedl
3. Put the suction hose (32) into the paint. If you
are pumping from a pail, push the drain hose
(33)
down below the top of the pail to avoid splashing
paint when the drain valve is opened.
4. Turn the pressure knob (64) to the minimum
5. Unlock the gun trigger safety. See Fig. 2, page
setting.
9.
To reduce the risk of damage to the displacement
pump packings, never run the pump without fluid
in it for more than 30 seconds.
6. To prime the pump, turn the sprayer switch (52)
starts. When fluid comes from the pressure drain
on. Slowly increase the pressure until the sprayer
valve, close the valve.
WARNING
To reduce the risk of static sparking and splashing
when priming or flushing the system, hold a metal
part of the gun firmly to the side of a grounded
metal pail before triggering the gun.
7. To prime the hose, lower the pressure to reduce
splashing. Hold a metal part of the gun firmly
against and aimed into a grounded metal pail.
See the WARNING, above. Hold the trigger open
and slowly increase the pressure until the pump
starts. Keep the
gun triggered until all air is forced
out of the system and the fluid flows freely from
the gun. Release the trigger and lock the gun trig-
ger safety.
308-216 11

Startup
8. Check all fluld connections for leaks. Relieve NOTE Spray patterns will change as tips wear.
pressure before tightening any connections. Change the spray tip
if adjusting the pressure will not
9. Install the spray tip. Lock the gun trigger safety
first1 See manual
307-848 for how to install the tip.
improve the spray pattern.
10. Adjust the spray pattern
a. Increase the pressure just until spray from the
gun is completely atomized.
To avoid exces-
sive overspray and fogging, and to extend tip
and sprayer life, always use the lowest pres-
sure needed to get the desired results.
b. If more coverage is needed, use a larger tip
rather than increasing the pressure.
c. Test the spray pattern. To adjust the direction
of the spray pattern, lock the gun trigger
safety and loosen the retaining nut
(A). Posi-
tion the tip guard horizontally for a horizontal
pattern or vertically for a vertical pattern. Hold
the tip guard in place while tightening the re-
taining nut. See Fig.
6. Fig. 6
A 1/4 npsm(m) fluid outlet
A DO not install any shutoff device here
A Rotate clockwise to increase pressure
A Shown in closed or spray position
A Fill 1/3 full with TSL
Fig. 7
02821A
12 308-216

Shutdown and Care
WARNING
To reduce the risk of serious injury, follow the
Pressure Relief Procedure Warning
on page 11
before doing this procedure. Unplug the sprayer!
1. Check the packlng nWwet-cup daily (102). Re-
lieve pressure first. Keep the wet-cup
1/3 full of
TSL at all times to help prevent fluid buildup on
the piston rod and premature wear of packings.
2. Tighten the packing nut/wet-cup (102) just
enough to stop leakage. Over-tightening causes
punch or brass rod and a light hammer to adjust
binding and excessive packing wear. Use a round
the nut. See Fig.
8.
3. Clean the gun’s fluid filter often and whenever
the gunis stored. Relieve pressure
first. Refer to
manual 307-614.
4. Periodically clean paint residue from the pres-
sure transducer
(29) vent hole area. See Fig. 9.
sive. See page 30.
Replace the transducer when leakage is exces-
5. Lubricate the bearing houslng after every 100
the bearing housing cavity
(A) with SAE 10 non-
hours of operation. Remove the front cover. Fill
detergent oil. See Fig.
9.
6. Flush the sprayer at the end of each work day
and fill it with mineral spirits to help prevent pump
corrosion and freezing.
See page 14.
CAUTION
To prevent pump corrosion, and to reduce the
chance of fluid freezing in the pump in cold
the sprayer when it is not in use. Freezing can se-
weather, never leave water or any,type of paint in
riously damage the sprayer or result in
a loss of
pressure or stalling.
7. For very short shutoff periods, leave the suction
hose in the paint, relieve pressure, and clean the
spray tip.
8. Coil the hose when storing it, even for overnight,
to help protect the hose from kinking, abrasion,
coupling damage, etc.
WARNING
See the warning section HOSE SAFETY on page
3 for information
on the hazard of using damaged
hoses,
u
Fig. 8
U
028234
Fig. 9
308-216 13

Flushing
When to flush
1. Before usina a new swaver: flush
which was
left in to prdted pump parts.
out the oil
Before using water-base paint: flush with min-
eral spirits followed by soapy water, and then a
clean waterflush.
Before using oil-base paint: flush with mineral
spirits only.
2. Changing colors: flush with a compatible solvent
such as mineral spirits or water.
3. Changing from water-base to oil-base paint:
flush with warm, soapy water, and then mineral
spirits.
4. Changing from oil-base to water-base paint:
flush with mineral spirits, then warm, soapy water,
and then a clean water flush.
5. Storage afler using water-base paint: flush with
water and then mineral spirits. Leave
the system
the drain valve open.
filled with mineral spirits. Relieve pressure. Leave
Storage after using oil-base paint: flush with
mineral spirits. Relieve pressure. Leave the drain
valve open.
CAUTION
NEVER leave water or water-based fluids in the
the water out with mineral spirits. Frozen fluid in
sprayer if there is a chance
it could freeze. Push
the sprayer prevents it from being started and may
cause serious damage.
I I
6. Startup after storage. Before using water-base
paint, flush out the mineral spirits with soapy wa-
ter and then clean water. When using oil-base
paint, flush out the mineral spirits with the paint.
How to flush
1. Follow the Pressure Relief Procedure on page
11.
2. Remove the spray tip and clean it separately.
3. Pour one-half gallon (2 liters) of compatible sol-
vent into a grounded metal flushing pail. Put the
suction hose in the pail.
4. Open the pressure drain valve. See Fig. 3, page
9.
5. To save the paint still In the pump and hose,
follow Step 6, except put the drain hose in the
paint pail. When solvent appears, close the drain
valve. Put the drain hose in the flushing pail. Trig-
ger the gun into the paint pail. When solvent ap-
pears, release the trigger. Continue with Step
6.
r
WARMING
To reduce static sparking and splashing, always
metal pari of the gun firmly to the side
of a
remove the spray tip from the gun, and hold a
grounded metal pail when flushing.
See Fig. 9.
A metal contact
Maintain firm metal to
behveen the gun and
a grounded metal
container
6. Lower the pressure setting. Turn on the sprayer.
Maintaining metal-to-metal contact, trigger the
gun into the flushing pail. Slowly increase the
sprayer pressure just until the pump starts. Keep
the gun triggered until the solvent flows freely
from the gun. Circulate the solvent to thoroughly
the gun trigger safety.
clean the sprayer. Release the gun trigger. Lock
7. Open the drain valve and circulate the solvent
through the drain hose to thoroughly clean it.
Close the drain valve.
8. Remove the suction hose from the pail. Unlock
the gun trigger safety. Trigger the gun and run the
pump a few seconds to push air into the hose.
Do
avoid damaging the pump packings! Relieve
not run the pump dry for more than
30 seconds to
pressure.
9. Remove and clean the inlet strainer. Wipe paint off
the suction hose and drain hose.
10. Refer to When To Flush, Step 1 again. Relieve
pressure.
11. Leave the drain valve open until you use the
sprayer again.
14 308-216

Troubleshooting
To reduce the risk of serious injury, follow the
Pressure Relief Procedure on page 11 before
doing this procedure. Unplug the sprayer1
Basic Problem Solving
Checkeverything in the guide before disassembling the sprayer.
YPE OF PROBLEM
luid pressure
lechanical
lectrical
JTE: Thaw SDraver if watt
MHAT TO CHECK
f check is OK. (10 to next check
I, Check pressure control knob setting. The pump
won't develop much pressure
if it is at minimum
setting
(fully counterclockwise).
used.
See page 10.
.I
!. Check for a clogged spray tip or fluid filter, if
I- Check for frozen or hardened paint in pump
fan
at back of motor by hand. See page 19.
(20). Using a screwdriver, carefully try to rotate
?, Check pump connecting rod pin (17). It must be
completely pushed into connecting rod
(15),
and retaining spring (1 8) must be firmly in con-
necling rod groove.
See Fig. 16, page 22.
1, Check for motor damage. Remove drive hous-
ing assembly
(11). See page 28. Try to rotate
motor fan by hand.
I, Check electrical supply with volt meter. Meter
should read
105-125 VAC.
-
T
-
F,
-
N
-
E
b NC I A
?r or water-based paint has frozen in it, due to exposure to low temperatures, by placing in a warm
area.
Do not try tcstart sprayer until completely thawed or damage to motor andlor start board may occur. If paint hardened
(dried) in sprayer, the pump packings (page
22) and/or pressure transducer (page 30) must be replaced.
?. Check extension cord for visible damage. Use a
volt meter or test lamp
at extension cord outlet
to check.
3. Check sprayer power supply cord (50) for vis-
1. Check motor brushes for the following:
a. Loose terminal screws.
b. Broken or misaligned brush springs.
ible damage such as broken insulation or wires.
c. Brushes binding in holders.
d. Broken leads.
e. Worn brushes.
on both sides
of motor. Check both brushes.
NOTE The brushes do not wear at same rate
WHAT TO DO
When check is not OK, refer to this column
1. Slowly increase pressure setting to see if
motor starts.
2. If tip is still clogged, relieve pressure: re-
fer to separate gun or tip instruction man-
ual for tip cleaning. Clean the filter,
if
used.
1. Thaw. Plug in sprayer and turn on. Slowly
starts. If it doesn't, see NOTE, below.
increase pressure setting to
see if motor
2. Push pin into place and secure with
spring retainer.
3. Replace motor (4) if fan won't turn. See
page 26.
1. Reset building circuit breaker; replace
building
fuse. Trv another outlet.
-
2. Replace extension cord.
3. Replace power supply cord.
See page 27.
4. Refer to page 21.
a. Tighten.
b. Replace broken sprlng andlor align
spring with brush
c. Clean brush holders. Remove carbon
with small cleaning brush. Align brush
leads with
slot in brush holder to as-
sure free vertical brush movement.
d. Replace brushes
e. Replace brushes if less than long.
308-216 15

Basic Problem Solving
YHAT TO CHECK WHAT TO DO
checkis OK, go to next check
When check is not OK, refer to this column
. Check motor armature commutator for burn
spots.
aouaesandextremerouahness. Remove
motor Eovir and brush inspectron plates to
check. See page 21.
. Checkmotorarmatureforshorts usina armature
I
~ 5. Remove motor and have motor shop
I resurface commutator if possible. See
page
26.
16. Replace motor. See page 26.
tester (growler) or perform motor tesL
See page 19.
. Check leads from pressure control and motor to 7. Replace loose terminals; crimp to leads.
motor start board (47) to be sure they are se-
curely fastened and properly mated.
Be sure male terminal blades are straigh
and firmly connected to mating part.
~~
,Check motor start board (47) by substituting 8. Replace board. See page 27.
with
a good board. See page 27. I
CAUTION: Do not perform this check until mo-
tor armature is determined to be good.
A bad
motor armature can burn
out a good board.
and white power cord terminals; connect volt 27.
should read VAC. Unplug sprayer.
meter to these leads. Plug in sprayer. Meter
. Check power supplycord (50). Disconnectblack 9. Replace power supply cord. See page
0. Check ON/OFF switch-(52). Disconnect the 'E
wire between motor start board (47) and switch
and connect volt meter between exposed
terminal
on switch and power cord's white wire.
Plug
in sprayer and turn ON. Meter should read
VAC. Turn
off and unplug sprayer.
1. Check motor thermal cutout switch. Connect
ohmmeter between motor's red leads. Meter
should read
1 ohm maximum..
2. Remove pressure control (64) and check micro-
switch operation with ohmmeter:
(1) With pressure knob at lowest setting and
stem pushed into control, readings should
be: white &black
= 1 ohm max.
white &red
= open.
(2) With pressure knob at highest setting,read-
white
ti red = 1 ohm max.
ings should be: white
& black = open;
3. Check pressure transducer (29) for hardened
paint or damaged or worn components. See
page 30.
10. Replace ONlOFF switch. See page 27.
11. Allow motor to cool. Correct cause of
overheating.
If switch remains open aftel
motor cools, replace motor.
-
12. Replace pressure control. See page 30.
-~ ~~ ~
13. Replace transducer. See page 30. Thor-
ough system flushing
will help extend lifl
of transducer.
Intermediate Problem Solving
~~ ~ ~
TYPE OF PROBLEM WHAT TO CHECK
If checkis OK. (10 to next check
Low output
1. Check for worn spray tip.
.-
! When check is not OK refer to this column
redace tio. See Your seDarate
aun or tiD
' manual. '
2. Be sure pump does not continue to stroke when 2. Service pump. See page 22.
gun trigger is released. Plug in and turn on
sprayer. Prime with paint. Trigger gun momen-
tarily, then release and lock safety latch. Relieve
pressure, turn
off and unplug sprayer.
16 308-216

Intermediate Problem Solving
YPE OF PROBLEM
ow output (continued)
Vain valve leaks
iansducer leaks
lo output: motor runs anc
lump strokes
Jo output: motor runs bui
ump does not stroke
WHATTO CHECK WHAT TO DO
If check is OK. GO to next check When check
is not OK. refer to this column
3. Release gun trigger. Observe resting position of 3. If pump consistently comes to rest with
pump rod (107).
I
ings andlor piston valve may be worn.
rod (107) fully extended, the piston pack
Service the pump. See page
22,
4. Check electrical supply with volt meter. Meter 4. Reset building circuit breaker; replace
should read VAC.
I building fuse. Repair electrical outlet or
I try anoiher outlet.
6. Check motor brushes. See Electrical - What To 6. See page 21.
7. Check motor start board (47) by substituting 7. Replace board. See page 27.
Check, item 4, on page 15.
with a good board.
CAUTION Do not perform this check until mo-
tor armature is determined to be good.
A bad
motor armature can burn
out a good board.
8. Check motor armature for shorts by using an 8. Replace motor. See page 26.
armature tester (growler) or perform motor test.
See page 19.
worn parts. Check for debris trapped
on seat. valve and replace with new gasket (42a)
1. Check drain valve for correct torque andlor 9. Tighten to 185 in-lb (21 Nm). Clean
and sealant (42d). See page 32.
1. Slight leakage from transducer is normal. 1. Periodically remove residue from its cylin.
1. Check paint supply.
1, Refill and reprime pump.
der port. See page 30.
2. Check for clogged intake strainer,
3. Check for loose suction tube or fittings. See
page 31.
4. Check to see
if intake valve ball and piston bail
are seating properly. See page
22.
5. Check for leaking around throat packing nut
which may indicate worn or damaged packings.
See page 22.
6. Release gun trigger. Observe resting position 01
pump rod (107).
1. Check displacement pump connecting rod pin
(17). See Fig. 17, page
22.
2. Remove and clean, then reinstall.
3. Tighten: use thread sealant on npt
threads
of inlet tube (38). Check for dam.
aged O-ring (27).
ball and seat for nicks; replace as need-
ed. See page 22. Strain paint before
us-
ing to remove particles that could clog
Pump.
5. Replace packings. See page 22. Also
check piston valve seat for hardened
paint or nicks and replace
if necessary.
Tighten Dackincl nWwet-cup.
4. Remove intake valve and clean. Check
6. If pump consistently comes to rest with
rod (107) fully extended. the piston pack.
ings andlor piston valve may be worn.
Service the pump. See page 22.
-~ ~ ~ ~
I. Replace pin if missing. Be sure retainer
spring
(18) is fully in groove all around
connecting rod.
7. Check connecting rod assembly (15) for dam- connecting rod assembly. See
age. See page
28.
.
I
8. Be sure crank in drive housing rotates; plug in 8. Check drive housing assembly for
..
soraver and turn on brieflv to check. Turn off damaqe and reolace if necessaty. See
and unplug sprayer. See page
28. I page28.
308-216 17

Intermediate Problem Solving
TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO
If check is OK, go to nexl check When check is not OK, refer to this column
I
Spray pattern variations 1. Spray tip worn beyond sprayer pressure 1. Replace spray tip.'
capability.
NOTE A smaller size tip will provide I
longer life.
2. Check transducer (29) for wear or damage.
3. Replace pressure control. See page 30.
3.
Check pressure control (64) for smooth
2. Replace transducer. See page 30.
operation.
I
4. Check Low output section, oaae 17.
I
CAUTION: Do not perform this check until
motor armature
is determined to be good. A
bad motor armature can burn out a good board. I
I I
Circuit breaker opens after asic Problems - Electrical' on
sprayer operates for
5 to 10
minutes. .. I
opens as soon as sprayer
around throat. Replace pump packings.
if
tightening tightens packings on rod, restricts
'prayer
is turned On.
sprayer until corrected.
-
is plugged into outlet and
1. If voltage is too high, do not operate 1. Check electrical supply with volt meter. Meter
Building circuii breaker
should read VAC.
2. Check tightness of pump packing nut. Over-
2. Loosen packing nut. Check for leaking
pump action, damages packings.
3. Replace motor. See page 26.
3. Check for damaged motor.
necessary.
See page 22.
I should be infinity with ON/OFF switcl
zero with switch
ON.
I
I CAUTION: A short in motor circuit can damage
switch and or motor start board
(47). I
I
I
Unit will not run on gener-
power
ator but does run on AC
1. Use AG power or a different generator 1. Check the generator's "peak" voltage. This
sprayer will not run
if the peak voltage is above
19ov.
18 308-216

Motor Test
WARNING
To reduce the risk of serious injury, follow the
Pressure Relief Procedure Warning
on page 11
before doing this procedure. Unplug the sprayer1
For checking armature, motor winding and brush
electrical continuity.
Setup
Remove the drive housing. See page 28. This is to
test is due to the motor and not to worn gears in the
ensure that any resistance you notice in the armature
drive housing.
Remove the motor brush inspection covers
(A). See
Fig.
11.
Remove the junction box screws (56). Lower the junc-
tion box. Disconnect the
two leads (C) from the motor
to the board
(47). See Fig. 12.
Armature Short Circuit Test
Remove the handle (24) and the fan cover (B). See
Fig.
11.
028Z9A
Spin the motor fan by hand. If there are no shorts, the
motor will coast
two or three revolutions before com-
ing to a complete stop.
If the motor does not spin
freely, the armature
is shorted and the motor must be
replaced. See page
26.
Armature, Brushes, and Motor Wiring
Open Circuit Test (Continuity)
Connect the two black motor leads together with a
test lead. Turn the motor fan by hand at about
two
revolutions per second.
When turning the fan on a DC motor, normally you
turning resistance, or no turning resistance, check
sense an even, pulsing resistance. If there is irregular
and repair the following as needed: broken brush
springs, brush leads, motor leadsi loose brush termi-
nal screws or motor lead terminals; worn brushes.
See page
21.
If there is still uneven or no turning resistance, replace
the motor. See page
26.
59
Flg. 12
308-216
19

General Repair Information
To reduce the risk of serious injury, follow the
Pressure Relief Procedure on page 11 before
doing this procedure. Unplug the sprayer1
Tool List
These are the tools required to service all parts of the
sprayer.
3/8” Allen@ wrench: pump manifold
3/16 Allen@ wrench: gear housing, legs, handle
#1 Phillips@ screwdriver: junction box,
3/8” socket wrench: motor mount
pressure control, front cover
5/8” socket wrench: drain valve, outlet fiftings,
13/16” socket wrench: drain valve
onloff switch boot, piston
1-1/4” socket wrench: pump inlet valve
1/2” open end wrench:
pump rod
11/16’’ open end wrench: piston jam
nut
15/16’’ open end wrench: flats ofinlet tube
1
-3/4” open end wrench: pump jam nut
5/64” drive pin: drain valve
pin
3“ needle nose pliers: wiring, onloff switch
Torque wrenches: various fasteners
Hammer
& punch: packing nut
1. When disconnecting wires in the junction box
assembly, use needle nose pliers
to separate
mating connectors.
2. When reconnecting the wires, be sure the flat
blade
of the insulated male connector is centered
in the wrap-around blade of the female
connector.
CAUTION
tion, be sure to properly mate connectors, and
To reduce the risk of a pressure control malfunc-
wire could loosen the connector from the wire.
never pull on a wire
to disconnect it. Pulling on a
3. Route wires carefully through the drive housing
and motor. Avoid pinching the wires between the
junction box and the motor or pressure control.
CAUTION
performance or damage to the pressure control.
Improper wire routing can result in poor sprayer
4. Keep all screws,
nuts, washers, gaskets, and
electrical fittings removed during repair proce-
dures. These parts are not normally provided with
replacement assemblies.
5. Test your repair before regular operation to be
sure the problem is corrected.
6. If the sprayer
does not operate properly, verify
that everything was done correctly. Also refer
to
the Troubleshooting Guide, pages 15-19, to help
identify other possible problems and solutions.
WARNING
To reduce the risk of serious injury, including elec-
tric shock, DO NOT touch any moving parts or
electrical parts with your fingers or a tool while
inspecting
the repair.
Shut
off the sprayer and unplug it as soon as you
complete the inspection.
Reinstall all covers, gaskets, screws and washers
before operating the sprayer.
During operation, the motor and drive housing
become very hot and could burn your skin if
touched. Flammable materials spilled on the hot,
bare motor could cause a fire or explosion.
20 308-216