Graco Inc 965171 Displacement Pump Service, Displacement Pump Disconnect the Displacement Pump

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Displacement Pump Service

210208 Displacement Pump Disconnect the Displacement Pump

1.Flush the pump if possible. Stop the pump on the down stroke.

2.Follow the Pressure Relief Procedure Warning on page 10.

3.Reference Roof Rig Parts Drawings, page 30.

4.Remove the suction tube and fluid hose from the displacement pump.

5.Unscrew the three tie rod locknuts (48). See ap- propriate sprayer parts drawing.

6.Unscrew the shouldered nut (35). Pull the displacement pump (46) off the tie rods (47).

7.Screw the jam nut (90) up onto the connecting rod (91).

8.Remove the lower cotter pin (89) and unscrew the connecting rod (91) from the connecting rod cou- pling (36, page 30).

9.Refer to separate pump manual for displacement pump repair instructions.

Reconnecting the Displacement Pump

1.Screw the connecting rod (91) into the connecting rod coupling (36, page 30) and replace the lower cotter pin (89). Screw the jam nut (90) all the way down. See appropriate sprayer parts drawing.

2.Mount the displacement pump (46) onto the tie rods (47).

3.Screw the shouldered nut (35) onto the hydraulic motor (29). Screw the tie rod locknuts (48) onto the tie rods (47) and torque to 35--50 ft-lb (47--68 N.m).

4.Reattach the hoses to the displacement pump.

5.If the grounding wire was disconnected before service, be sure to reconnect it before operating the sprayer.

6.Start the pump and operate it slowly to check the tie rods for binding. Adjust the tie rod locknuts, if necessary to eliminate binding.

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Contents Important Safety Instructions GH Series Roof Rigs Gas--Hydraulic Airless Sprayers 308972RModel 687100, Series C Model 687327, Series DTable of Contents SymbolsWarning Symbol Caution SymbolSKIN INJECTION HAZARD TOXIC FLUID HAZARDFUEL HAZARD EXHAUST HAZARDFIRE AND EXPLOSION HAZARD MOVING PARTS HAZARDFIRE AND SKIN INJECTIONSetup Component Identification1. Connect the Hose and Gun 9089dGRADE OF OIL CHART GASOLINE FILL CAP OIL DIPSTICKENGINE OIL FILL PLUG 3. Check the Hydraulic Oil Level5. Fill the Fuel Tank FIRE AND EXPLOSION HAZARD6. Grounding OR EXPLOSION HAZARD on pageWhen to Flush How to FlushSKIN INJECTION HAZARD Follow the Pressure Relief Procedure FlushingTo reduce the risk of static sparking and Pressure Relief Procedure parts, follow the Pressure Relief ProcedureOperation SKIN INJECTION HAZARD5. Adjusting the Pressure 6. Cleaning a Clogged Tipa. Follow the Pressure Relief Procedure Warning on page 8. Adjusting the Intake Valve Ball TravelMaintenance 9. To change the hydraulic oilTroubleshooting PROBLEMSOLUTION CAUSEReplacing the Hydraulic Pump B DIMENSION A 0.05 in. ± 1.27 mm ± A Replacing the Cooler and BlowerENGINE TOP VIEWDisplacement Pump Service 210208 Displacement Pump Disconnect the Displacement Pump2. Follow the Pressure Relief Procedure Warning on page Reconnecting the Displacement Pump2. Relieve the pressure Model GH5030 Parts Drawing9086B SCREW, mach, hex washer hd, 8 x 3/8 in.1 GH5030 Parts ListROD, Tie, 14.59 in. shoulder to shoulder GH5030 Parts List cont Y DANGER and WARNING labels are available at no chargeGH3640 Parts Drawing GH3640 Parts List GH3640 Parts List cont GH2560 Parts Drawing 9087BGH2560 Parts List DESCRIPTION GH2075 Parts Drawing GH2075 Parts List GH2075 Parts List cont GH1015 Parts Drawing 9088B33 144 161 125GH1015 Parts List GH1015 Parts List cont All Models Parts Drawing Models687100, 687327 965171All Models Parts List All Models Parts List 7879b Models 687100, 687327, 965168, 9651717879A Technical Data AccessoriesMust be purchased separately GRACO--APPROVED HYDRAULIC FLUIDGraco Warranty ADDITIONAL WARRANTY COVERAGEGraco Information FOR GRACO CANADA CUSTOMERS