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All written and visual data contained in this document reflects the latest product information available at the time of publication. 

Graco reserves the right to make changes at any time without notice.

Original instructions.

 This manual contains English. MM 3A1190

Graco Headquarters: 

Minneapolis

International Offices: 

Belgium, China, Japan, Korea

GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA

Copyright 2010, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.

www.graco.com

Revision 

H, May 2016

Airlessco Standard Warranty

Airlessco warrants all equipment referenced in this document which is manufactured by Airlessco and bearing its name to be free from defects in 
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty 
published by Airlessco, Airlessco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined 
by Airlessco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Airlessco’s 
written recommendations.

This warranty does not cover, and Airlessco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty 
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of 
non-Airlessco component parts. Nor shall Airlessco be liable for malfunction, damage or wear caused by the incompatibility of Airlessco 
equipment with structures, accessories, equipment or materials not supplied by Airlessco, or the improper design, manufacture, installation, 
operation or maintenance of structures, accessories, equipment or materials not supplied by Airlessco.

This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Airlessco distributor for verification 
of the claimed defect. If the claimed defect is verified, Airlessco will repair or replace free of charge any defective parts. The equipment will be 
returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship, 
repairs will be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.

THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT 
LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE

Airlessco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy 
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or 
consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.

AIRLESSCO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT 
MANUFACTURED BY Airlessco

. These items sold, but not manufactured by Airlessco (such as electric motors, switches, hose, etc.), are subject 

to the warranty, if any, of their manufacturer. Airlessco will provide purchaser with reasonable assistance in making any claim for breach of these 
warranties.

In no event will Airlessco be liable for indirect, incidental, special or consequential damages resulting from Airlessco supplying equipment 
hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of 
warranty, the negligence of Airlessco, or otherwise.

FOR AIRLESSCO CANADA CUSTOMERS

The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into, 
given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la 
rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite 
de ou en rapport, directement ou indirectement, avec les procédures concernées.

Summary of Contents for 331861

Page 1: ...only Airlessco Home Depot LP540 Hi Boy 331861 Series B 3000 psi 20 7 MPa 207 bar Maximum Working Pressure IMPORTANT SAFETY INSTRUCTIONS Read all warnings and instructions in this manual Be familiar wi...

Page 2: ...f electric shock When repair or replacement of the cord or plug is required do not connect the grounding wire to either flat blade terminal The wire with insulation having an outer surface that is gre...

Page 3: ...or conductive Connect to a grounded outlet and use grounded extension cords Do not use a 3 to 2 adapter Do not use a paint or a solvent containing halogenated hydrocarbons Do not spray combustible li...

Page 4: ...to stop the unit and bleed pressure quickly Be thoroughly familiar with the controls EQUIPMENT MISUSE HAZARD Misuse can cause death or serious injury Always wear appropriate gloves eye protection and...

Page 5: ...know the specific hazards of the fluids you are using Store hazardous fluid in approved containers and dispose of it according to applicable guidelines PERSONAL PROTECTIVE EQUIPMENT Wear appropriate...

Page 6: ...pump and relieves pressure from gun hose and tip D Prime Pressure Relief Valve Open Posi tion Relieves pressure from gun hose and tip and primes the unit when in the open position Valve is in open po...

Page 7: ...pressure If the spray tip or hose is clogged follow Steps 1 through 5 above Expect paint to splash into the bucket while relieving pressure during Step 4 If you suspect that pressure hasn t been reli...

Page 8: ...e storing and before repairing equipment Flushing 1 Make sure the gun trigger lock in engaged and there is no spray tip in the gun Refer to the separate instruction manual provided with gun for safety...

Page 9: ...emove the suction tube or pump from the solvent pail force the solvent from the pump and hose Engage the gun trigger lock See Storage 10 13 Whenever shutting down the sprayer follow Pres sure Relief P...

Page 10: ...r Airlessco Pump Conditioner For oil base paint flush with mineral spirits For water base paint flush with water then min eral spirits and leave the pump hose and gun filled with mineral spirits Long...

Page 11: ...e brush wire 5 Pull out the wire 6 Remove the worn brushes 7 Install new brushes in the reverse order To increase brush life new brushes Part 331780 for 110 volt need to have a run in period After cha...

Page 12: ...0 ft lbs 4 Reassemble lower suction valve assembly by plac ing the suction seat O ring suction ball and suction ball guide in the suction nut 7 and screw onto fluid pump body 5 Reconnect the fluid tub...

Page 13: ...y 6 Disassemble all parts and clean for reassembly Discard any old packings 7 Lubricate leather packing in lightweight oil for 10 minutes prior to reassembly Reassembly of the Fluid Pump 1 Place lower...

Page 14: ...position hold the pump body upside down and push the completed assembly upwards into the pump body Once placed inside tilt pump body back up to keep all pieces in 17 Tighten packing nut 21 onto the to...

Page 15: ...ench 4 Reassemble in reverse order Torque to 30 ft lbs Potentiometer 1 Lower pressure control assembly as described above 2 Disconnect potentiometer lead from pressure con trol assembly 3 Use a 1 16 a...

Page 16: ...f unable to loosen the two nuts hold them and unscrew the two screws Then remove the LCD Dis play Assembly 4 Reassemble in reverse order while making sure that the two spacers and the two washers are...

Page 17: ...s and or piston worn Tighten packing nut repack unit Unit does not maintain good spraying pressure Blown spray tip Replace spray tip Packings and or pistons worn Repack unit Upper seat worn Replace up...

Page 18: ...t sensor available use a multi meter to test the resistance across the red and black wires of the sensor be sure to test the plug You should read 1 5 3 5k ohms A faulty sensor usually reads no continu...

Page 19: ...times repeatedly Sprayer shuts down and LED continues to blink four times repeatedly Pressure transducer is faulty or missing Check transducer connection Open prime pressure relief valve Substitute n...

Page 20: ...ure transducer faulty bad connection or broken wire Check transducer connection Open prime pressure relief valve Substitute new transducer for transducer in sprayer If sprayer runs replace transducer...

Page 21: ...lar deflected Orifice clogged Clean carefully Tip damaged Replace with new tip Craters or pock marks bubbles on work Solvent balance Use 1 to 3 short solvents remainder long sol vents this is most lik...

Page 22: ...art Description Qty Ref Part Description Qty 1 867145 COVER 1 6 867077 BASE 1 2 301356 SPRING 1 7 867420 PLUG 2 3 867377 O RING 1 9 867309 NIPPLE 3 8 M x 1 4 M 1 4 867214 FILTER 60 MESH 1 10 557391 PL...

Page 23: ...9 331029 SUCTION BALL GUIDE 1 10 331030 SUCTION BALL 1 11 108526 O RING 1 12 331292 SUCTION SEAT HI BOY 1 13 331034 SUCTION NUT 1 8 9 10 11 12 13 ti16055a 1 4 6 5 8 7 Ref Part Description Qty 1 PISTO...

Page 24: ...0RPM 1 2 331273 FRAME LP540 HD 1 3 16F551 FASTENER THREAD EXTERNAL 4 4 866356 SPACER SPACER 75 LG PVC 2 5 106062 WHEEL SEMI PNEUMATIC 2 6 143029 COLLAR SCREW SET 2 7 331048 BOOT RUBBER BOOT 2 65 34244...

Page 25: ...ETR ASSEMBLY 1 26 867804 LABEL CONTROL LP 1 27 867798 DISPLAY WINDOW 1 30 116167 KNOB POTENTIMETER 1 33 867965 CONTROL BOARD 120V 1 34 331342 SCREW MACH PANHEAD 4 76 866049 CABLE ASSY 9 LG 1 92 WASHER...

Page 26: ...26 3A1190H Motor and Drive Parts Diagram 1 35 36 37 39 40 41 43 44 45 46 47 47 48 48 49 51 114 55 56 57 58 59 60 61 63 66 67 70 71 73 8 10 89 18 18 11 14 16 32 9 15 34 12 13 42 156 213 31 13 112 72 ti...

Page 27: ...SLEEVE BEARING not shown 1 35b 331234 COVER BARE not shown 1 35c 331046 BEARING not shown 1 36 331047 BEARING BALL 1 37 331593 GEAR CRANK 29 ASSEMBLY 1 39 331038 YOKE CROSSHEAD ASSY 1 40 331074 SPACER...

Page 28: ...Parts 28 3A1190H Packing Replacement 6 7 27 11 12 13 15 4 21 14 26 1 1 3 23 23 2 2 2 24 25 16 16 16 20 17 19 22 18 5 ti16057a...

Page 29: ...26 OUTLET SEAT 1 12 111457 O RING 1 13 331027 OUTLET BALL 1 14 PISTON 1 15 331018 SPACER 1 16 331025 BELLEVILLE SPRINGS 3 17 331022 MALE GLAND 1 18 331023 PACKING POLYETHYLENE 3 19 331021 FEMALE GLAND...

Page 30: ...ti16059a ti16061a Standard Suction Assembly 331284 Ref Part Description Qty 1 301348 BYPASS HOSE ASSEMBLY 1 2 331034 SUCTION NUT 1 3 331292 SUCTION SEAT ASSEM BLY 1 4 331400 INLET TUBE 1 Optional Suct...

Page 31: ...k Black Black ti2471b 1 3 5 6 7 9 Ref Part Description Qty Ref Part Description Qty 1 331163 ELECTRICAL CORD110V 1 6 243222 KIT REPAIR TRANSDUCER 1 3 301083 TOGGLE SWITCH 1 7 256219 POTENTIOMETER 1 5...

Page 32: ...3 4 5 7 6 Ref Part Description Qty Ref Part Description Qty 1 867816 SCREW 2 5 867817 NUT 2 2 867804 LABEL PRESSURE CONTROL 1 6 LCD DISPLAY PSI 1 3 867798 WINDOW 1 7 867731 WASHER 2 4 117281 SPACER 2...

Page 33: ...n toggle switch ON and adjust to low pressure on the pressure control knob The unit will now self prime STEP 4 4A Wait about one minute until fluid comes out of the return tube smaller diameter tube 4...

Page 34: ...o prepared bucket of water or mineral spirits STEP 3 Release the gun trigger lock very carefully 3A Turn the Prime PR Valve to be closed position Adjust the pressure control knob for minimum pressure...

Page 35: ...00 w minimum Maximum delivery 0 57 gpm 2 2 lpm Maximum tip size 0 025 Fluid outlet npsm 1 4 in Noise Sound power 91 dBa Sound pressure 75 dBa Wetted parts zinc and nickel plated carbon steel nylon sta...

Page 36: ...efective parts The equipment will be returned to the original purchaser transportation prepaid If inspection of the equipment does not disclose any defect in material or workmanship repairs will be ma...

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