Graco 278680 Instructions Manual Download Page 28

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 332257

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 278680

Page 1: ...application of architectural paints and coatings For professional use only Model 278680 3300 psi 22 7 MPa 227 bar Maximum Working Pressure Important Safety Instructions Read all warnings and instructi...

Page 2: ...placement 17 Removal 17 Installation 17 Fan Replacement 18 Removal 18 Installation 18 ON OFF Switch Power Cord Board Kit 19 Removal 19 Installation 19 Motor Control Board 20 Removal 20 Installation 20...

Page 3: ...t static discharge Do not use pail liners unless they are are antistatic or conductive Connect to a grounded outlet and use grounded extensions cords Do not use a 3 to 2 adapter Do not use a paint or...

Page 4: ...t parts only Do not alter or modify equipment Alterations or modifications may void agency approvals and create safety hazards Make sure all equipment is rated and approved for the environment in whic...

Page 5: ...H J K M N S T P R F E D B C ps A G ti21027a A Pressure control B Power Cord C ON OFF switch D Digital Display E Prime Spray valve F Filter G Fluid outlet H Siphon tube J Drain tube K Pump M Hose N Spr...

Page 6: ...ontainer follow local code Object being sprayed follow local code Power Requirements 230V units require 220 240 VAC 50 60 Hz 8A 1 phase Extension Cords If an extension cord is necessary use a 3 wire 1...

Page 7: ...such as paper or cardboard which interrupts grounding continuity Grounding a metal pail connect a ground wire to the pail by clamping one end to pail and other end to a true earth ground such as a wat...

Page 8: ...lly relieved after following these steps VERY SLOWLY loosen tip guard retaining nut or hose end coupling to relieve pressure gradually then loosen completely Now clear tip or hose obstruction This equ...

Page 9: ...repair Unplug sprayer when power is not required for test ing Install all covers gaskets screws and washers before you operate sprayer NOTICE To reduce risk of pressure control malfunction Use needle...

Page 10: ...en or paint hardened in pump Thaw sprayer if water or water based paint has frozen in sprayer Place sprayer in warm area to thaw Do not start sprayer until thawed completely If paint hardened dried in...

Page 11: ...ted Clean circuit board terminals Securely reconnect leads NOTE For the following electric problems refer to Wiring Diagram page 24 to identify Test Points TP Power supply cord Connect volt meter betw...

Page 12: ...lectrical outlet or try another outlet Extension cord size and length must be at least 12 gauge wire and no longer than 300 ft Longer cord lengths reduce sprayer performance Replace with a correct gro...

Page 13: ...See pump manual Pump rod damage Replace pump page 15 Motor runs but pump does not stroke Displacement pump pin damaged or missing Replace pump pin if missing Be sure retainer spring is fully in groove...

Page 14: ...a new pressure control board See page 22 Building circuit breaker opens as soon as sprayer is plugged into outlet and sprayer is NOT turned on Basic Electric Problems page 10 of Troubleshooting Perfo...

Page 15: ...n position to be removed 2 Perform Pressure Relief Procedure page 8 3 Loosen screws 12 Push cover 70 up and pull off sprayer 4 Remove suction tube 60 and hose 45 5 Using a flat screwdriver push retain...

Page 16: ...m nut by hand then tap 1 8 to 1 4 turn with a 20 oz maximum hammer to approximately 75 ft lb 102 N m 8 Install suction tube 60 and high pressure hose 45 Tighten fittings 9 Fill packing nut with Graco...

Page 17: ...end bell Using grease for retention place washer 10 over bearing inside housing 42 3 Install washers 1 9 on back of gear 44 Install in motor endbell 4 Install thrust washer 25 on gear 44 5 Push drive...

Page 18: ...four screws 12 and shroud 23 3 Loosen tensioning screw 126 on fan 125 4 Pull off fan 125 Installation 1 Slide new fan 125 in place on back of motor Be sure blades of fan face motor as shown 2 Tighten...

Page 19: ...etween control boards 9 Remove switch board from box Installation 1 Reconnect black and blue leads between control and switch boards 2 Slide ON OFF switch 30 through opening in con trol box housing an...

Page 20: ...de power cord out of strain relief to remove cord 8 Remove two screws 47 and remove motor control enclosure Pull motor control enclosure to the left to remove from transducer 38 Installation 1 Connect...

Page 21: ...ransducer E 03 Three times repeatedly Sprayer shuts down and LED continues to blink three times repeatedly Pressure transducer is faulty or missing Check transducer connection Open drain valve Substit...

Page 22: ...cover 51 3 Disconnect potentiometer lead from motor control board 48 4 Remove potentiometer knob 11 o ring 129 nut 37a and pressure adjust potentiometer 37 Installation 1 Install pressure adjust poten...

Page 23: ...h screws 47 Torque to 16 0 18 0 N m 2 Install control housing 48 with screws 47 Torque to 16 0 18 0 N m 3 Install manifold 15 with screws 47 Torque to 16 0 18 0 N m 4 Connect motor leads See Wiring Di...

Page 24: ...Wiring Diagram 24 332257A Wiring Diagram MOTOR ON OFF SWITCH POWER PLUG BLUE BROWN GREEN TRANSDUCER POTENTIOMETER DIGITAL DISPLAY BLUE BLACK ti21098a...

Page 25: ...Notes 332257A 25 Notes...

Page 26: ...Notes 26 332257A Notes...

Page 27: ...Notes 332257A 27 Notes...

Page 28: ...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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