Ball Check Valve Repair - Graco Husky 1590 DB3 Series Installation Manual

Ball Check Valve Repair

Tools Required
•
Torque wrench
•
13 mm socket wrench
•
O-ring pick
Disassembly
NOTE: A 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 (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.
Also, on some models, replace the o-rings (202).
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 13 mm socket wrench, remove the four bolts
(106) holding the outlet manifold (103) to the fluid
covers (101). See F
4. Remove the o-rings (202, not used on some models),
seats (201), and balls (301) from the manifold.
5. Turn the pump over and remove the inlet manifold
(102). Remove the o-rings (202, not used on some
models), seats (201), and balls (301) 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 F . 10. Be sure the ball checks are assembled
IG
exactly as shown. The arrows (A) on the fluid covers
(101) must point toward the outlet manifold (103).
. 10.
IG
Service
1
Apply medium-strength (blue) thread locker to the threads. Torque
to 120-150 in-lb (14-17 Nm). See Torque Instructions, page 29.
2
Arrow (A) must point toward outlet manifold (103).
3
Not used on some models.
4
Beveled seating surface must face ball (301).
3
__________________________
F . 10
IG
106
1
106
103
301*
201*
4
202*
3
101
A
2
301*
201*
4
202*
3
102
1
03272B
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