12
308368
Service
Repairing the Air Valve
Tools Required
D
Torque wrench
D
Torx (T20) screwdriver or 7 mm (9/32”) socket
wrench
D
Needle-nose pliers
D
O-ring pick
D
Lithium base grease
NOTE:
Air Valve Repair Kit 236273 is available. Refer
to page 22. Parts included in the kit are marked with a
symbol, for example (4
{
). Use all the parts in the kit for
the best results.
Disassembly
1.
Follow the
Pressure Relief Procedure Warning
on page 9.
2.
With a Torx (T20) screwdriver or 7 mm (9/32”)
socket wrench, remove the six screws (3), air
valve cover (2), and gasket (4). See Fig. 6.
3.
Move the valve carriage (5) to the center position
and pull it out of the cavity. Remove the valve
block (7) and o-ring (6) from the carriage. Using a
needle-nose pliers, pull the pilot block (18) straight
up and out of the cavity. See Fig. 7.
4.
Pull the two actuator pistons (11) out of the bear-
ings (12). Remove the u-cup packings (10) from
the pistons. Pull the pilot pins (16) out of the
bearings (15). Remove the o-rings (17) from the
pilot pins. See Fig. 8.
5.
Inspect the valve plate (8) in place. If damaged,
use a Torx (T20) screwdriver or 7 mm (9/32”)
socket wrench to remove the three screws (3).
Remove the valve plate (8) and seal (9). See Fig.
9.
6.
Inspect the bearings (12, 15) in place. See Fig. 8.
The bearings are tapered and, if damaged, must
be removed from the outside. This requires disas-
sembly of the fluid section. See page 18.
7.
Clean all parts and inspect for wear or damage.
Replace as needed. Reassemble as explained on
page 13.
03944
Torque to 50 to 60 in–lb (5.6 to 6.8 N.m).
Fig. 6
3
2
4
{
2
2
03945
{
18
5
Fig. 7
1
2
See Detail at right.
Grease.
3
Grease lower face.
1
{
7
{
6
5
2
3
3
11
16
