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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.

For patent information, see www.graco.com/patents. 

Original instructions.

 This manual contains English. MM 332157

Graco Headquarters: 

Minneapolis

International Offices: 

Belgium, China, Japan, Korea

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

Copyright 2012, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.

www.graco.com

Revision A - February 2013

Graco Standard Warranty

Graco warrants all equipment referenced in this document which is manufactured by Graco 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 Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by 
Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written 
recommendations.

This warranty does not cover, and Graco 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-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with 
structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or 
maintenance of structures, accessories, equipment or materials not supplied by Graco.

This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of 
the claimed defect. If the claimed defect is verified, Graco 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

Graco’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.

GRACO 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 GRACO

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

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

In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco 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 Graco, or otherwise.

FOR GRACO 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.

Graco Information

For the latest information about Graco products, visit www.graco.com.

TO PLACE AN ORDER, contact your Graco distributor or call 1-800-690-2894 to identify the nearest distributor.

Summary of Contents for GH 16U277

Page 1: ...si 6 9 MPa 69 bar 16U278 GH2570es Bare 2500 psi 17 2 MPa 172 bar 16U279 GH733es Bare 4000 psi 27 6 MPa 276 bar 16U280 GH5040es Bare 5000 psi 34 5 MPa 345 bar 16U285 GH933es Bare 7250 psi 50 0 MPa 500...

Page 2: ...ement 16 Removal 16 Installation 16 Hydraulic Motor 17 Hydraulic Pump Replacement 18 Changing Hydraulic Oil 18 Removal 18 Installation 20 Belt Removal and Replacement recommended method 22 Removing Be...

Page 3: ...u feel a shock Do not use equipment until you identify and correct the problem Keep a working fire extinguisher in the work area SKIN INJECTION HAZARD High pressure spray is able to inject toxins into...

Page 4: ...or cause an explosion if mishandled Only use the battery type specified for use with the equipment See Technical Data Battery maintenance must only be performed or supervised by personnel knowledgeabl...

Page 5: ...lectric Start Units 3 Engine ON OFF Switch Pull Start Units 4 Lift Location 5 Suction Tube Holder 6 Pressure Control 7 Lock Ring 8 Serial Number ID Label 9 Hydraulic Pump Valve 10 Hydraulic Oil Fill 1...

Page 6: ...ure to verify you did it correctly See Troubleshooting page 8 Grounding This equipment stays pressurized until pressure is manually relieved To help prevent serious injury from pressurized fluid such...

Page 7: ...ecessary Keep TSL in nut to help prevent fluid build up on piston rod and premature wear of packings and pump corrosion After first 20 hours of operation Drain engine oil and refill with clean oil Ref...

Page 8: ...rod up or down until hydraulic motor shifts Displacement pump operates but output is low on upstroke Piston ball check not seating prop erly Service piston ball check See manu als 308043 311825 311762...

Page 9: ...hose Check for loose connections on siphon assembly tighten then rep rime pump Loose intake suction Tighten Fluid supply is low or empty Refill supply container Excessive hydraulic pump noise Low hydr...

Page 10: ...o fit over the hose 3 Remove compensator screws and separate com pensator and adapter block 4 Install new gaskets and torque screws 5 Install cover 140 with four screws 79 Torque to 25 30 in lb 2 8 3...

Page 11: ...62 for pump repair instructions Removal 1 Flush pump 36 Stop pump on down stroke if possible 2 Perform Pressure Relief Procedure page 6 3 Remove suction set 147 from pump 36 4 Remove clip 121 5 Slide...

Page 12: ...ue to 50 8 ft lb 68 11 N m 3 Slide cover 124 up over pump rod With engine in OFF position and pump valve in ON position pull recoil starter to move rod until it contacts pump rod 4 Install coupling 12...

Page 13: ...instructions Removal 1 Flush pump 36 Stop pump on down stroke if possible 2 Perform Pressure Relief Procedure page 6 3 Remove suction set 147 from pump 36 4 Use crescent wrench to loosen coupler 213...

Page 14: ...to 50 8 ft lb 68 11 N m 3 Slide cover 124 up over pump rod With engine in OFF position and pump valve in ON position pull recoil starter to move rod until it contacts pump rod 4 Install collar coupli...

Page 15: ...tie rods 47 6 Refer to manuals 311762 308043 and 311825 for displacement pump repair instructions Reconnect Displacement Pump 1 Mount displacement pump 46 onto tie rods 47 See Parts manual 2 Screw ti...

Page 16: ...ve power head from unit Installation 1 Install power head on unit 2 Tighten power head bolts 7 Torque bolts to 400 10 in lb 45 1 N m 3 Attach hoses 100 101 to head 75 Torque to 450 10 in lb 50 84 N m...

Page 17: ...Hydraulic Motor 332157A 17 Hydraulic Motor 1 2 4 1 450 in lb 51 N m 600 in lb 68 N m 930 in lb 105 N m Torqued in 3 steps 2 4 ti20948a...

Page 18: ...Relief Procedure page 6 Allow hydraulic system to cool before beginning the service procedure 2 Drain oil Changing Hydraulic Oil procedure page 18 3 Remove screw 197 and pump handle cover 196 Remove f...

Page 19: ...d grommets 80 2 each side 6 Remove belt cover 67 7 Remove belt 19 page 22 8 Loosen set screws 87 on front of large pulley 4 9 Remove pulley 4 from hydraulic pump shaft 10 Remove nuts 10 and screws 9 h...

Page 20: ...N m Torque fitting 34 to 450 in lb 50 8 N m NOTE Fill pump casing with hydraulic oil before install ing fitting 34 2 Install new pump 3 in frame 3 Install screws 9 and nuts 10 Torque to 225 10 in lb 2...

Page 21: ...ers 78 and screws 79 2 each side Torque screws to 25 30 in lb 2 8 3 4 N m 9 Install suction lines Tighten fittings Torque fitting A to 225 10 in lb 25 4 1 1 N m Fitting B to 450 10 in lb 50 1 1 1 N m...

Page 22: ...ulley 4 c With the palm of your hand hold the belt snug to large pulley while at the same time slowly pull engine recoil to rotate pulleys d Check belt 19 alignment on both large 4 and small pulley 6...

Page 23: ...s b Tighten engine bolts 21 Torque to 225 10 in lb 25 4 1 1 N m c Check belt 19 alignment on both large 4 and small pulley 6 When properly positioned over pulleys belt should be centered on pulleys an...

Page 24: ...age 18 Keep plug for use on new res ervoir 3 Remove fill cap 27 and filter assembly 111 Keep for use on new reservoir 4 Loosen and remove suction hose 153 5 Remove and keep suction fitting 32 for use...

Page 25: ...servoir 64 to frame 9 Lift reservoir 64 out of frame Installation 1 Install plug 102 return elbow 31 suction fitting 32 inlet screen 89 and filter assembly 111 in new reservoir 64 2 Install new reserv...

Page 26: ...m 5 Reattach return lines 100 101 Torque three times to 450 10 in lb 51 1 1 N m 6 Install filter 107 7 Reattach suction hose 153 Toque to 600 10 in lb 68 1 1 N m 8 Verify drain plug has been replaced...

Page 27: ...11 5 Pull filter 108 off cap 155 Installation 1 Install new o ring 113 from kit 2 Install new filter 108 over cap 155 3 Install cap 155 and filter 108 in filter housing 111 Hand tighten cap till snug...

Page 28: ...ge 6 2 Loosen ground screw and remove ground clamp 95 from sprayer 3 Loosen and remove return line to oil tank and hydraulic line to cooler 4 Remove screws 79 washers 78 and support bar 77 from coolin...

Page 29: ...screws 79 Tighten screws 2 Replace bar and screws Torque to 25 30 in lb 2 8 3 4 N m 3 Reconnect return line to oil tank and hydraulic line to cooler Torque to 225 in lb 25 4 N m 4 Replace ground wire...

Page 30: ...is procedure is only necessary if you are replacing the motor When you install a new motor you reuse the existing pulley Removal a Loosen set screw 87 located on the side of the pulley 6 b Remove larg...

Page 31: ...Engine Replacement 332157A 31 Engine Replacement 67 79 78 80 21 10 86 46 45 5 81 82 5a 19 4 6 65 24 14 86 87 139 ti20932a...

Page 32: ...bed you must reposition the handle 1 Remove the 4 handle sleeve screws 143 2 Remove handle assembly 25 by pulling it out of upper frame tubes 1 3 Remove frame tube plugs 120 located behind the wheels...

Page 33: ...n U bolts over sprayer frame as indicated in the following illustration 1 Reposition handle steps 1 5 page 32 2 Place U bolts over sprayer frame and through holes in vehicle bed Place a washer and nut...

Page 34: ...Notes 34 332157A Notes...

Page 35: ...Notes 332157A 35 Notes...

Page 36: ...tion 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 t...

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