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18 308443
Service
Ball Check Valve Repair
Tools Required
D Torque wrench
D 10 mm socket wrench
D O-ring pick
Disassembly
NOTE: A Fluid Section Repair Kit is available. Refer to
page 25 to order the correct kit for your pump. Parts
included in the kit are marked with an asterisk, for
example (201*). Use all the parts in the kit for the best
results.
NOTE: To ensure proper seating of the balls (301),
always replace the seats (201) when replacing the
balls.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 11.
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 (106) holding the outlet manifold (103) to the
fluid covers (101). See Fig. 11.
4. Remove the seats (201), balls (301), and o-rings
(202) from the manifold.
NOTE: Some models use two o-rings (202), some
models use four o-rings (202), and some models do
not use o-rings.
5. Turn the pump over and remove the inlet manifold
(102). Remove the seats (201), balls (301), and
o-rings (202) from the fluid covers (101).
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. 11. Assemble the ball checks exactly
as shown. The arrows (A) on the fluid covers (101)
must point toward the outlet manifold (103).
Fig. 11
1
2
Torque to 80 to 90 in-lb (9 to 10 N-m). See Torque Se-
quence, page 30.
Arrow (A) must point toward outlet manifold (103).
106
103
101
A
201*
301*
112
102
201*
301*
2
1
1
202*
202*
3
Not used on some models.
3
3
4
Beveled seating surface must face ball (301).
4
4
04157
B