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O'Brien PRO 301 Owner's Manual

Airless paint sprayer
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OWNER'S MANUAL
This manual contains IMPORTANT
INSTRUCTIONS and WARNINGS.
READ AND RETAIN FOR REFERENCE.
Model 223-636, Series A
2500 psi (172 bar) MAXIMUM WORKING PRESSURE

TABLE OF CONTENTS

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Maintenance
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Application Techniques
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NOTE: This is an example of the DANGER label on your sprayer.
This label is available in other languages, free of charge.
See page 28 to order.
Spray painting, flushing or cleaning equipment with flammable liq-
uids in confined areas can result in fire or explosion.
Use outdoors or in extremely well ventilated areas. Ground equip-
ment, hoses, containers and objects being sprayed.
Avoid all ignition sources such as static electricity from plastic drop
cloths, open flames such as pilot lights, hot objects such as ciga-
rettes, arcs from connecting or disconnecting power cords or turn-
ing light switches on and off.
Failure to follow this warning can result in death or serious injury.
READ AND UNDERSTAND ALL LABELS AND INSTRUCTION MANUALS BEFORE USE
THE O'BRIEN CORPORATION, 450 E. Grand Avenue, So. San Francisco, CA 94080
PRO 301
Airless Paint Sprayer
1/3 GPM, Electric
2
8
10
11
12
13
14
15
24
28
31
31
32
FIRE AND
EXPLOSION HAZARD
COPYRIGHT 1990, GRACO INC.
Liquids can be injected into the body by high pressure airless spray
or leaks - especially hose leaks.
Keep body clear of the nozzle. Never stop leaks with any part of the
body. Drain all pressure before removing parts.Avoid accidental trig-
gering of gun by always setting safety latch when not spraying.
Never spray without a tip guard.
In
case
of
accidental
"Surgical Treatment".
Failure to follow this warning can result in amputation or serious
injury.
308-030
Rev A
SKIN INJECTION
HAZARD
skin
injection,
seek
immediate

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  • Page 1: Table Of Contents

    OWNER’S MANUAL 308–030 Rev A This manual contains IMPORTANT INSTRUCTIONS and WARNINGS. READ AND RETAIN FOR REFERENCE. PRO 301 Airless Paint Sprayer 1/3 GPM, Electric Model 223–636, Series A 2500 psi (172 bar) MAXIMUM WORKING PRESSURE TABLE OF CONTENTS Warnings .

  • Page 2: Warnings

    WARNINGS HIGH PRESSURE SPRAY CAN CAUSE SERIOUS INJURY. FOR PROFESSIONAL USE ONLY. OBSERVE ALL WARNINGS. Read and understand all instruction manuals before operating the equipment. FLUID INJECTION HAZARD General Safety Safety Latch This equipment generates very high fluid pressure. Spray from Whenever you stop spraying, even for a moment, always set the gun, leaks or ruptured components can inject fluid through the gun safety latch in the closed or “safe”...
  • Page 3 MOVING PARTS HAZARD HOSE SAFETY Moving parts can pinch or amputate your fingers or other body High pressure fluid in the hoses can be very dangerous. If the parts. KEEP CLEAR of moving parts when starting or operat- hose develops a leak, split or rupture due to any kind of wear, ing the sprayer.
  • Page 4 AVERTISSEMENT La pulvérisation à haute pression peut causer de blessures très graves. Réservé exclusivement à l’usage professionnel. Observer toutes les consignes de sécurité. Bien lire et bien comprendre tous les manuels d’instructions avant d’utiliser le matériel. RISQUES D’INJECTION Verrou de sécurité Consignes générales de sécurité...
  • Page 5 RISQUES EN CAS DE MAUVAISE UTILISATION DU MATERIAL Consignes générales de sécurité TOUS LES TUYAUX FLEXIBLES DOIVENT AVOIR DES RESSORTS SPIRALE DE PROTECTION AUX 2 BOUTS! toute utilisation anormale de l’appareil du pulvérisation ou des Les spirales de protection contribuent à éviter la formation de accessoires comme, par exemple, la mise sous une pression pliures, de boucles ou de nœuds sur les tuyaux qui pourraient excessive, les modifications de pièces, l’utilisation de produits...
  • Page 6 ADVERTENCIA EL ROCIADO A ALTA PRESION PUEDE CAUSAR GRAVES LESIONES. SOLO PARA USO PROFESIONAL. RESPECTE LOS AVISOS DE ADVERTENCIA. Lea y entienda todo el manual de instrucciones antes de manejar el equipo. PELIGRO DE INYECCION DE FLUIDO Seguridad general Aparatos de seguridad de la pistola pulverizadora Este equipo general un fluido a una presión muy alta.
  • Page 7 PELIGRO POR MAL USO DEL EQUIPO Seguridad general Presión del sistema Cualquier mal uso del equipo pulverizador o los accesorios, Esta pulverizadora puede desarrollar 175 barías (2500 psi) de tal como sobre presurización, modificación de piezas, uso de PRESION DE TRABAJO MAXIMA. Asegurar que todo el equi- materiales y productos químicos incompatibles, o utilización po pulverizador y sus accesorios tienen la capacidad para de piezas dañadas o desgastadas, puede hacen que se...

  • Page 8: Setup

    SETUP WARNING CAUTION To reduce the risk of serious bodily injury To avoid damaging the pressure control, fol- caused by static sparking, fluid injection or low these precautions. over–pressurization and rupture of the hose 1. Always use flexible, grounded hose at or gun: least 50 feet (15.2 m) long.
  • Page 9 SETUP HOSE RACK PACKING NUT/ WETCUP Keep filled with TSL ON/OFF SWITCH SUCTION TUBE STRAINER PRESSURE CONTROL KNOB PRESSURE DRAIN VALVE PUMP 1/4 NPSM(M) FLUID OUTLET DO NOT INSTALL A SHUT OFF DEVICE HERE Fig 1 OPERATION WARNING Pressure Relief Procedure 5.
  • Page 10 OPERATION ON/OFF SWITCH HOSE RACK SUCTION TUBE STRAINER PRESSURE ADJUSTING KNOB CCW TO LOWER PRESSURE PUMP PRESSURE DRAIN VALVE Fig 2 1. Prime the sprayer with paint. NOTE: If the pump is hard to prime, open the valve. When fluid comes from the valve, close it.

  • Page 11: Shutdown And Care

    OPERATION 3. Adjusting the spray pattern (See Fig 4.) WARNING To reduce the risk of serious bodily injury a. Increase the pressure just until spray from from injection, use extreme caution when the gun is completely atomized. To avoid cleaning or changing spray tips. If the spray excessive overspray and fogging, to tip clogs while spraying, engage the gun decrease tip wear and to extend the life of...

  • Page 12: Startup

    FLUSHING GUIDELINES When To Flush 3. Changing from water-base to oil-base paint. Flush with warm, soapy water, and then CAUTION flush with mineral spirits. NEVER leave water in the sprayer if there is 4. Changing from oil-base to water-base the slightest chance it could freeze. Flush out paint.

  • Page 13: Application Methods

    APPLICATION METHODS Hold the gun perpendicular to the surface. Keep The best way to control the rate of coverage is the gun at an even 12 to 14 in. (300–356 mm) with the gun tip size. A small tip orifice applies from the surface you are spraying.

  • Page 14: Troubleshooting Guide

    TROUBLESHOOTING GUIDE WARNING Pressure Relief Procedure 4. Disengage the gun safety latch. Hold a metal part To reduce the risk of serious bodily injury, including of the gun firmly to the side of a grounded metal pail, and trigger the gun. fluid injection, splashing in the eyes or on the skin, 5.
  • Page 15 PROBLEM CAUSE SOLUTION Paint leaks into wet–cup Throat packings are worn or damaged Replace the packings. See page 16. Excessive surging from spray gun Spray tip or fluid filter is plugged Disassemble and clean. Spray tip too big or worn Change the spray tip.

  • Page 16: Repair

    DISPLACEMENT PUMP WARNING WARNING To reduce the risk of serious bodily injury,fol- Be sure the retaining spring (65) is firmly and low the Pressure Relief Procedure Warning completely in the groove of the connecting on page 14 before checking or repairing any rod to prevent the pin (63) from working loose part of the spray system.

  • Page 17: Displacement Pump

    DISPLACEMENT PUMP Reassembly Procedure 7. Insert the oiled piston rod (223) into the bot- tom of the cylinder. 1. Stack the backup washer (219*), U–cup seal (205*) lips down , and female gland (220*), al- 8. Assemble the intake valve. Use a new gasket ternate the polyethylene and leather v–pack- (206*).
  • Page 18 PRESSURE CONTROL & CIRCUIT BOARD WARNING Pressure Control Installation To reduce the risk of serious bodily injury, al- 9. Connect any other loose wires. See Fig 16. ways follow the Pressure Relief Procedure 10. Mount the pressure control on the cart. Install Warning on page 14 before checking or re- the lift handle.

  • Page 19: Pressure Control Adjustment

    PRESSURE CONTROL ADJUSTMENT WARNING USE EXTREME CAUTION WHEN PERFORMING THIS ADJUSTMENT PROCEDURE to reduce the risk of a fluid injection injury or other serious bodily injury, which can result from component rup- ture, electric shock, fire, explosion or moving parts. This procedure sets the sprayer to 2500 psi NEVER attempt to increase the sprayer’s maxi- (172 bar) MAXIMUM WORKING PRESSURE.
  • Page 20 PRESSURE CONTROL ADJUSTMENT 1. Relieve pressure. See page 14. If the pressure is lower than 2500 psi ( 172 bar): 2. Remove the old spray hose. Install the new Unplug the sprayer and relieve pressure. Turn hardware and hose as shown in Fig 17. On the adjustment nut (B) counterclockwise 1/8 the other end of the hose install the needle turn or less.
  • Page 21 CONNECTING ROD and BEARING HOUSING WARNING CAUTION To reduce the risk of serious bodily injury, al- To extend the service life of the connecting ways follow the Pressure Relief Procedure rod bearing, lubricate it properly. After every Warning on page 14 before checking or re- 100 hours of operation, or whenever servic- pairing any part of the spray system.

  • Page 22: Drive Housing

    DRIVE HOUSING WARNING 3. Remove the two screws (51). Pull the bearing housing and connecting rod assembly (A) off To reduce the risk of serious bodily injury, al- the crankshaft (B). ways follow the Pressure Relief Procedure Warning on page 14 before checking or re- 4.
  • Page 23 MOTOR & CAPACITOR WARNING 10. Clean the gear (60) and inspect it for wear or To reduce the risk of serious bodily injury, al- damage. Replace if necessary. Secure the ways follow the Pressure Relief Procedure gear with the pin (61). Apply molybdenum dis- Warning on page 14 before checking or re- ulfide spray lubricant to the gear, allow to dry, pairing any part of the spray system.
  • Page 24 PARTS LIST PRO 301 Sprayer Model 223–636, Series A Includes items listed below PART NO. DESCRIPTION PART NO. DESCRIPTION 110–886 SCREW, 162–453 NIPPLE; mach; pnh; Type F; 1/4–18 npsm (m) x 6–32 unc–3a x 0.375” 1/4–18 npt(m); 1.18” long 223–802 LIFT HANDLE 176–762...

  • Page 25: Parts Drawing

    PARTS DRAWING PRO 301 Sprayer MODEL 223–636, Series A ID LABEL, THIS SIDE ID LABEL, OTHER SIDE DANGER LABEL ID LABEL DANGER LABEL SEE DETAIL BELOW DETAIL ID LABEL, OUTSIDE WARNING LABEL, INSIDE Ref 41 Ref 26 308–030...
  • Page 26 PARTS DRAWING – PRESSURE CONTROL Part No. 215–860 Ref No. 18 Pressure Control Assembly Includes replaceable items listed below Ref 13c Ref 13f 307a 307b Ref 90 Ref 70 Ref 89 Ref 30 Ref 16 Refer to page 24 for the parts numbers of references Ref 4 not given in the parts list be-...
  • Page 27 DISPLACEMENT PUMP PARTS DRAWING and LIST Model 218–215, Series C NO. PART NO. DESCRIPTION Carbon Steel Displacement Pump Includes items 201 to 224 201 180–656 PLUG 203 105–444* BALL, sst; 0.3125” dia. 204 105–445* BALL, sst; 0.5” dia. NOTE: See the repair instructions for im- 205 105–522* SEAL, u–cup, polyurethane...

  • Page 28: Accessories

    ACCESSORIES MUST BE PURCHASED SEP ARATELY REVERSE-A-CLEAN Dripless TIP GUARD 220–422 Uses fluid pressure from the gun to remove clogs DANGER LABELS without removing the tip guard to spray tip. (As shown The English language DANGER label shown on on guns, below .) Requires SwitchTip , purchased page 1 is also on your sprayer.
  • Page 29 NOTES 308–030...
  • Page 30 NOTES 308–030...

  • Page 31: Technical Data

    TECHNICAL DATA Electric Motor ......0.5 HP, 1725 rpm, 115V, 60HzAC, single phase with automatic thermal overload switch. UL Listed Electric Cord .

  • Page 32: Warranty

    THE GRACO WARRANTY AND DISCLAIMERS WARRANTY Graco warrants all equipment manufactured by it and bearing its name to be free from defects in material and workman- ship on the date of sale by an authorized Graco distributor to the original purchaser for use. As purchaser’s sole remedy for breach of this warranty, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment proven defective.

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