Repair
22
3A8693B
Reassemble Air Valve
1.
If bearings (12, 15) were removed, install new
bearings. See Replace Bearing and Air Gasket,
page 23.
2.
Install the valve plate seal (9) into the groove at the
bottom of the valve cavity. Ensure the rounded side
of the seal faces down into the groove. See F
3.
Install the valve plate (8) in the cavity. The plate is
reversible, so either side can face up.
4.
Use an applicable screwdriver or wrench to install
the screws (3). Tighten until the screws bottom out
on the housing. See Fig. 9.
5.
Install an o-ring (17) on each pilot pin (16). Grease
the pins and o-rings.
6.
Insert the pilot pins (16) into the bearings (15),
narrow end first. See F
7.
Install a u-cup packing (10) on each actuator piston
(11). Ensure the lips of the packings face the narrow
end of the pistons. See F
8.
Lubricate the u-cup packings (10) and actuator
pistons (11). Reach inside the cavity and insert the
actuator pistons into the bearings (12), wide end
first. Leave the narrow end of the pistons exposed.
See F
9.
Grease the lower face of the pilot block (18) and
install so its tabs snap into the grooves on the ends
of the pilot pins (16). See F
10. Grease the o-ring (6) and install it in the valve block
11. Push the valve block (7) onto the valve carriage (5).
Grease the lower face of the valve block. See F
12. Install the valve carriage (5) so its tabs slip into the
grooves on the narrow end of the actuator pistons
(11). See F
13. Align the valve gasket (4) and cover (2) with the
center housing (1) holes.
14. Insert screws (3). Torque to 50–60 in-lb (5.6–6.8
15. Reconnect equipment to air and fluid lines.
F
IG
. 12: Air Valve Pistons
F
IG
. 13: Air Valve Plate
1
2
4
3
Insert narrow end first.
1
2
Grease.
12
11
15
16
17
2
10
Lips face narrow end of piston (11).
Insert wide end first.
4
3
8
1
2
Rounded side must face down.
1
Tighten until bottoms out on housing.
3
9
2
