Displacement Pump Service

Displacement Pump Service

Disassembly

NOTE: Displacement Pump Repair Kit 238225 includes repair parts for the pump throat and piston. Use all the parts in the kit for the best results. Parts included in the kit are marked with a dagger, for example (7{), in the text and drawings. See the Parts List on page 15.

1. Flush the pump.

Intake Valve. See Fig 5. WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8.

2.Relieve the pressure.

3.Disconnect the hoses, remove the pump from its mounting, and clamp the air motor base (28) in a vise horizontally by closing the vice jaws on the flange.

Intake Valve. See Fig 5.

1.Relieve the pressure.

2.Unscrew the valve housing (111). Remove the o-ring (105{), retainer (112), and ball (104).

3.Inspect the parts for wear or damage. If the ball is nicked, replace it. Reassemble, using grease on the male threads.

Displacement Pump. See Fig 5.

NOTE: Clean and inspect all parts for wear or damage as you disassemble them. Replace parts as needed. For best results, always replace all the o-rings and packings when you disassem- ble the pump.

1.Relieve the pressure.

2.Follow steps 1 to 7 of Disassembly on page 10.

3.Carefully inspect the smooth inner surface of the cylinder (110) for scoring or irregular surfaces. Such damage causes premature seal wear and leaking. Replace the cylinder as needed.

Reassembly

Do steps 16 through 23 in Air Motor and Throat Service on page 13.

110 1.Relieve the pressure.

112 Displacement Pump. See Fig 5.

104

105{ 14 308608KManual background

111

05617

Fig. 5

{Included in Pump Repair Kit 238225, which may be purchased separately. The Parts List on page 15 includes all parts in kit.

14 308608K

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Image 14
Graco Series D Displacement Pump Service, Relieve the pressure, 14 308608K, Disassembly, Reassembly, Intake Valve. See Fig
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238108, Series D specifications

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