819.0254
17
Service
Ball Check Valve Repair
Tools Required
•
Torque wrench
•
10 mm socket wrench
•
O-ring pick
Disassembly
NOTE: Fluid Section Repair Kit is available. Refer to page
24 to order the correct kit for your pump. Parts included in
the kit are marked with an asterisk, for example (16*). Use
all the parts in the kit for the best results.
NOTE: To ensure proper seating of the balls (16), always
replace the seats (17) when replacing the balls.
1.
Relieve the pressure. Disconnect all hoses.
2.
Remove the pump from its mounting.
3.
Using a 10 mm socket wrench, remove the four bolts
(6) holding the outlet manifold (1) to the fluid covers
(2). See Fig. 14.
4.
Remove the seats (17) and balls (16) from the
manifold.
5.
Turn the pump over and remove the inlet manifold (3).
Remove the seats (17) and balls (16) from the fluid
covers (2).
Reassembly
1.
Clean all parts and inspect for wear or damage.
Replace parts as needed.
2.
Reassemble in the reverse order, following all notes in
Fig. 14. Be sure the ball checks are assembled
exactly as shown. The arrows (A) on the fluid covers
(2) must point toward the outlet manifold (1).
NOTE : Apply medium-strength (blue) Loctite or
equivalent to the threads, and torque to 120 to 150 in-lb
(14 to 17 N•m). See Torque Sequence on page 25.
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 11.
