Ball Check Valve Repair - Graco Husky 1040 Instructions-Parts List Manual

Ball Check Valve Repair

Tools Required
•
Torque wrench
•
10 mm socket wrench
•
O-ring pick
Disassembly
NOTE: A Fluid Section Repair Kit is available. Refer to
page 27 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 12.
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).
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Service
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. Be sure the ball checks exactly as
shown. The arrows (A) on the fluid covers (101)
must point toward the outlet manifold (103).
Torque to 80 to 90 in-lb (9–10 N-m). See Torque Sequence,
1
page 32.
Arrow (A) must point toward outlet manifold (103).
2
3 Not used on some models.
Beveled seating surface must face the ball (301).
4
Fig. 11
106
1
103
301*
201*
4
202*
3
A
2
101
301*
201*
4
202*
3
102
112
1