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
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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