Graco PRO 301ST, Owner'S Manual

Page 1: ...the bodybyhlghpressure airless spray result Inflre or exploslon Ior aks especlally hose leaks I U6e outdoorsorinextreme1 well wntllatedareaa Ground equip trlggerlng of gunby always sefflng safety latch when notspraying body Drak ail prf5surebeforeremovlng parts Avoldlaccldental ment hoses contalners ancroblecta being sprayed Keepbod elear Of the Never O P leaks with an PartOf the Avoid all Ignitio...

Page 2: ...ive Failure tosetthe safety latch can result inacci dental triggeringof the gun Diffuser Thegundiffuserbreaksupsprayandreducestheriskoffluidin jection when thetip is not installed Check diffuser operation regularly Follow the Pressure Relief Procedure below then remove the spray tip Aim the gunintoa metal pail holding the the gun If the fluid emitted is notdiffused into an irregular gunfirmiytothe...

Page 3: ...lace the hose immediately Do nottryto recouple high pres ommended limits replaceit immediately An ungrounded or sure hose or mendi twith tape or any other device A repaired poorly grounded hose canmake your system hazardous Also hose cannot contain the highpressure fluid read FIRE OR EXPLOSION HAZARD I FIRE OR EXPLOSION HAZARD Staticelectricityiscreated bytheflow of fluidthroughthe pump 6 A l lsol...

Page 4: ... de pulv6riser rndme s il s agit d un courtinstant toujours mettre leverrou de securitedu 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 ...

Page 5: ...erre ou avec une mise A laterre 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 passagedu fluide B 2 Tuyauxfiexbles Afin d assurer la continuite dela mise a la grande vitesse dans la pompe et dans les tuyaux Si toutes les piecesde I appareil de puiverisati...

Page 6: ...uridadde la pistolapulveriradora funcionando bien antes de cada uso No sacar ni modificar ningljnapiezadelapistolapues podriacausar el malfunciona mientodelamismaconlasconsiguienteslesionespersonales Pestillo de seguridad Cada vez que se deje de pulverizar aunque sea por unbreve momento siempre colocar el pestlllode seguridaden la posi puede llevaral disparo imprevisto de la pistola ci6n cerrada l...

Page 7: ...a tierra manguera NOintentarracoplarunamangueradealtapresibn 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 queha sido remendadano aguante el fluido a alta presi6n PELIGRO DE INCENDIQ0 EXPLOSION Elflujo a aka velocidad delfluido al pasar por labomba y man guera crea electricidad es...

Page 8: ... at least 50 ft 15 m long 2 Never use a wire braid hose asit istoo rigidto act as apulsationdampener 3 Never installany shutoff device between the pump andthe 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 installthe spraytip yet1 2 Fill the wet cup 102 Pry off the wet cup seal Fillthe cup 1 3 full with Graco Throat Seal Li...

Page 9: ...tal pari of the gun firmly to the side of a grounded metal pail then trigger the gun 6 Flush the pump to remove theoil which was left page 14 into protect pump parts after factorytesting See 7 Preparethe paint according to the manufactur Stir thepaintto mix pigments Strain the paint er s recommendations Remove any paintskin through a fine nylon mesh bag available at most paintdealers to remove par...

Page 10: ...ose to the spraytip 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 thetip frequently during the day s operation First follow the Pressure Relief Proce dure onpage 11 WARNING To reduce the risk of serlous injury follow the Pre...

Page 11: ... time startup flush the sprayer See page 14 NOTE Referto Fig 1 andthe other figures refer enced inthe text as you start the sprayer 1 Open the pressure drain valve 42 2 Don t Install thespray tip until the pump is primedl 3 Put the suction hose 32 into the paint Ifyou are pumping from a pail pushthe drain hose 33 down below the top of the pailto avoid splashing paintwhen the drain valve is opened ...

Page 12: ... andto extendtip and sprayer life always use the lowest pres sure neededto 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 thedirection of the spray pattern lockthe guntrigger safety and loosen the retaining nut A Posi tion the tip guard horizontally for a horizontal patternor vertically for a vertical pat...

Page 13: ...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 andto reduce the ...

Page 14: ...f compatible sol vent intoa grounded metal flushing pail Put the suction hoseinthe pail 4 Open the pressure drainvalve See Fig 3 page 9 5 To save the paint still In the pump and hose follow Step6 except putthe drain hose in the paintpail When solvent appears close the drain valve Put the drain hose in the flushing pail Trig ger the gun intothe paint pail When solvent ap pears release the trigger C...

Page 15: ...int hardened dried in sprayer the pump packings page22 and or pressure transducer page 30 must be replaced Check extension cordfor 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 Looseterminal screws b Broken or misaligned brush springs ible damage such as broken insulation or wire...

Page 16: ...switch and connect volt meter between exposed terminal on switch and power cord s white wire Pluginsprayer andturn 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 andcheck micro switch operation with ohmmeter 1 With pressureknob at lowestsettingand stem p...

Page 17: ...ducer 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 p...

Page 18: ...yer operates for 5 to 10 minutes I opens as soon as sprayer around throat Replace pumppackings if tightening tightens packings on rod restricts prayer is turned On sprayer until corrected is plugged into outlet and 1 Ifvoltage is too high do not operate 1 Check electrical supply with volt meter Meter Buildingcircuii breaker should readVAC 2 Check tightnessof pump packingnut Over 2 Loosen packing n...

Page 19: ...r B See Fig 11 028Z9A Spin the motor fan by hand If there areno shorts the motor will coast two or three revolutions before com ingto a complete stop If the motor does not spin freely the armatureis shorted and the motor must be replaced See page26 Armature Brushes and Motor Wiring Open Circuit Test Continuity Connect thetwo black motor leads together with a test lead Turn the motor fan by hand at...

Page 20: ...ce the risk of a pressure control malfunc wire could loosen the connector from the wire never pull ona wireto disconnect it Pullingon a 3 Route wires carefullythrough thedrive housing and motor Avoidpinching the wires between the junction box and the motor or pressure control CAUTION performance or damage to the pressure control Improper wire routingcan resultin poor sprayer 4 Keep all screws nuts...

Page 21: ...yer is plugged in to reduce the riskof electricshock and serious injury 1 Remove both inspection covers A andtheir gas kets See Fig 13 10 installthe brush inspection covers and gaskets 11 Break Inthe brushes Operate the sprayer for at least one hour with no load Installthe pump connecting rod pin A Motorlead do not disconnect A Minimum0 5 12 5mm Fig 13 2 Push inthe springclip F and releaseits hook...

Page 22: ...ins with a soft hammer Tighten the screws 21 to 50ft lb 68N m 2 Align the hole in the rod 107 with the connecting rod assembly 15 Use a screwdriver to push the retaining spring 18 up andpush in the pin 1 7 Push theretainingspring 18 into place around the connectingrod WARNING Be sure the retainingspring 18 is firmlyinthe groove all the way around to prevent thepin 17 from working loose due to vibr...

Page 23: ...thepistonrod 107 tom of the cylinder down and then pullthe rod out through the bot 4 Remove the packing nut 102 andthroat pack ings 5 Loosen the jam nut 1 1 7 Removethe cylinder 115 andthe O ring 116 6 Clamp the flats of the piston rod in a smooth jaw vise Use an open end wrench to loosen the nut 1 10 and then unscrew the pistonvalve 108 7 Remove all parts from the pistonvalve 108 Reassemblingthe ...

Page 24: ...n til the nut 110 contacts therod See Fig 21 7 Place the flats of the rod 107 in a smooth jaw vise 8 CAREFULLYtighten the nut 1 1 0 against thepis ton rod to 19Alb 25Nm See Fig 21 Usetwo wrenches to maintain the alignment men tioned in NOTEbelow Step3 A to 19 I lb 25 N m Torque nut against rod Do not allownut 1io 2 to move relative to piston 108 when tightening piston against rod 107 I l O A A 108...

Page 25: ...15 See Fig 23 1 3 Put the manifold in a vise Fullythread the jam nut 117 onto thecylinder 115 Guide the rod cylinder assembly down through the manifold 101 Screw thecylinder 115 intothe manifold See Fig 23 14 Place theball guide 120 stop pin 122 and ball 121 inthe cylinder 115 Screw theintake valve intothe cylinderandtorque to 53 ft lb 7 1Nm This will also properly torque the cylinder intothe mani...

Page 26: ...page 27 Remove the drive housing cover 13 Turnthe displacementpump rod 107 so the pin hole alignswith the bottomdrivehousing screw screws and lockwashers 19 6 Also see Fig 26 19 See Fig 25 Remove the three drive housing Removethe two motor screws and lockwashers 56 Tap the lower rear of the drive housing 11 with a housingstraightoff the motor while guiding the plastic malletto loosen the motor Pul...

Page 27: ...ressure 2 Remove the junction box screws 56 and lower 3 Disconnect the power supply cord leads includ the junction box 59 ing the green wire to the grounding screw 49 4 Loosen thestrainrelief bushing 51 Remove the power supplycord 50 5 Installthe newcord 50 inthe reverse order of disassembly 6 Install thejunction box Be sureno leads are pinched against the motor or bythe motor start board Also be ...

Page 28: ...the drive housing if not removed The balls which are heavily covered with grease usually stayin the gear re cesses but could be dislodged Ifthe balls are not in place the bearings will wear prematurely 6 Remove and inspect the crankshaft 12 andthe connecting rod 15 7 Installthe connectingrod 8 Lubricate theinsideof the drive housing bearing with SA non detergent oil Pack the rollerbear ing and gea...

Page 29: ...Drive Housing Connec od Crankshaft A Torque to80 in lb 9 N m A Quantityof three A Quantityof one A p p y a total of 3 fl oz of grease A 3 1 to gears Note Filter not shown Fig 29 308 216 29 ...

Page 30: ...ive housing 11 Do not pinch or damage the harness A 7 Loosely installthe screws 63 and then torque them to 21 in lb 2 4 Nm 8 Install the front cover 13 Connect the harness A to the motor start board 47 9 Installthe junction box Be sure no leads are board pinched against the motor or bythe motor start Pressure Transducer WARNING To reduce therisk of serious injury follow the Pressure Relief Procedu...

Page 31: ...he clip Re movethe front cover 13 Pullupwardon the hose 32 while unscrewingit from theinlettube 38 The hosecoupling A threads will engage and the hose will separate from the tube Replace theo ring 27 if it is worn or damaged Lubricate theo ring 27 and the inlet tube 38 threads withlight grease Align the suction hose coupling with the threads of the inlettube 38 Tighten the hose onto the tube at le...

Page 32: ...with a new one 3 Coat the O ring 42d with grease Press the stem intothe valve body Installthe spring wash ers and spring retainer intothe valve body 4 Place the seat 42b inthe valve body so the lapped sideistoward the ball Apply a small amount of grease to the new gasket 42a and install itinthe valve body NOTE The gasket will protrude from the end of the valve untilthe valve is tightened into pump...

Page 33: ...n GLAND female piston CYLINDER pump PACKING O ring NUT jam l 3 8 18 unef 2b INLET VALVE GUIDE ball PACKING O ring PIN ball stop BALL 1 2 inlet PLUG SEALANT not shown LABEL Warning Supplied in Repair Kit 235 703 Keep a repair kit on handto reduce downtime Qty 1 1 1 3 2 1 1 1 1 1 1 2 3 1 1 1 1 1 1 1 1 1 1 1 1 123 I 102 i lo3 lo4 I I I I 1 c107 13 114 1 1 7 a 108 Manual Change Summary Assembly Add 18...

Page 34: ...U ptJ25 34 308 216 u ...

Page 35: ...1 1 66 189 932 BASE motor 15 218 359 CONNECTING ROD 1 67 220 955 CONTRACTOR GUN 1 16 218 364 GEAR REDUCER 1 See rnanual307 614 forparts 17 176 818 PIN headless 3 8 dia x 1 1 68 206 994 TSL 802 not shown 1 1 8 176 817 SPRING retaining 1 74 223 541 HOSE grounded nylon 114 ID 1 19 103 345 SCREW socket head 20 236 787 PUMP KIT 89 187 963 GASKET 21 111 706 CAPSCREW 7 16 14x1 3 4 2 A a warning labels av...

Page 36: ...rasion corrosion inadequate or improper maintenance negligence accident tampering or substitution of non Graco component parts Nor shall Graco be liable for malfunction damage or wear caused by the incompatibility with Graco equipment of structures accessories equipment or materials not supplied by Graco or the improper design manufacture installation operation or maintenance of structures accesso...