Intake Valve - Graco Power-Star B Series Instructions Manual

7. Install the upper housing (36). Install a 3/4 inch flat
stock shim between the upper housing and the
cylinder. Install the trip rod guide (41), the spring
(34), valve spool (38), and the remaining parts from
the inside of the upper housing. See Parts Drawing,
page 15,
8. Holding the trip rod (33) steady with a trip rod pliers
on the rod, and install the top hex nut (16) on the
trip rod.
9. Replace the o-ring (11) on the stop plug (39). Install
the stop plug in the upper housing (36).
10. Install tie rods (47) and bolts (23); hand tighten.
11. Install the two lock nuts (5) and washers (6).
12. Apply thread sealant to the socket screws (9).
Install the end cap (40) with the socket screws.
NOTICE
To avoid damaging the internal parts, install detent
parts (31, 21, 29, 30, and 7) after install the end cap
(40).
13. Install one detent assembly; retaining plug (31),
spring (21), gasket (29), ball guide (30), and ball (7).
Repeat for the other detent assembly.
14. Align the tie rods (47) and bolts (23) and torque to
70 to 80 ft-lbs (95 to 108 N.m). Install eyelet (26)
Attach hoist to the eyelet.
15. Screw the top and bottom flare nuts on the
hydraulic tube (49), and install the tube.
16. Place the motor horizontally in a vise at the pump
adapter (42) and the bottom cylinder cap (43).
17. Apply thread sealant to the threads of the piston
(110) and install the piston, ball (103), and the seal
(107) with the lips facing up.
18. Remove the hydraulic motor from the vise.
19. Place the piston (110) flats in a vise.
20. Tighten the piston (44a) with a wrench.
21. Remove the piston from the vise.
22. Place the pump horizontally in the vise.
23. Install the displacement pump with a strap wrench.
308391P
24. Remove the hydraulic motor from the bench vise.
25. Unplug all hydraulic connections and lines and
connect the hydraulic hoses. Connect the
displacement pump hoses.
26. Flush the displacement pump if possible. Relieve
the pressure (page 8)
26
9
5
40
4
5
6
34
38
34
41
22
5
33
47
4
37
10
18
F . 4
IG

Intake Valve

Refer to F . 5 for the following instructions.
IG
1. Relieve the pressure, see page 8.
2. Unscrew the valve body (112). Remove the o-ring
(105), ball (104), and retainer (113).
3. Inspect the parts for wear or damage. If the ball is
nicked, replace it. Reassemble, using grease on the
male threads.
Repair
39
11
6
7
16
30
21
41 29
31
36
50
Note: Square housings
shown.
12
35
44b
5
15
1
12
43
17
2
45
3
17
42
Rings must be positioned
1
with joints opposed 180
Lips must face
46
2
up toward top of motor
Lips must face down to-
3
ward bottom of pump
Torque to
4
70–80 ft–lb (95–108 N.m)
25 Apply Loctite TL–242
7
5
thread sealant to threads
6 Concave surface faces ball
Torque to
7
120–130 ft–lb (163–176 N.m)
13