CONTROL VALVES
SUBSECTION 5C
DISASSEMBLY. Use the following procedure to disassem-
assembly to make sure there is a good ball seat inside.
ble the valve (see Figure 5C-7):
Check the piston ball, guide and spring for excessive wear.
Replace all seals and O-rings.
1. Rotate end plug (01) out of the valve body, O-ring (02),
snap ring (03) and washer (04) will come out with the end
NOTE
plug.
Valve seal and repair kits are available. See the
2. Remove spring (05) and washer (06). Remove the stem
Replacement Parts Manual.
and piston assembly (items 07 through 14) and sleeve (17)
from the body. Press pin (12) out of piston (11A). This will 1. Generously coat all parts to be assembled with hydraulic
oil.
release ball (11E), guide (11D), and spring (11C).
3. After removing retaining ring (24) from the stem end of 2. Install new O-ring (15) and back-up washer (16) on
sleeve (17). Place the sleeve in the valve body. The sleeve
the valve body, pry out plug (23).
must enter smoothly with slight hand pressure.
INSPECTION AND REPAIR. Thoroughly clean all parts and 3. Assemble the piston and stem assembly (items 07
dry with compressed air. Inspect the sleeve stem and piston through 14) as shown. install the seals and back-up
for excessive wear, nicks or scratches. Check the piston washers on the piston.
16.
O-RING
18.
BACK-UP WASHER
17.
SLEEVE
01.
END PLUG
18.
O-RING
10.
BACK-UP WASHER
02.
O-RING
19.
VALVE BODY
11 A.
PISTON
03.
SNAP RING
11B.
PLUG
20.
O-RING
04.
WASHER
21.
BACK-UP WASHER
11C.
SPRING
05.
SPRING
22.
O-RING
11D.
GUIDE
06.
WASHER
11E.
BALL
23.
END PLUG
07.
SEAL
24.
RETAINING RING
12.
PIN
08.
BACK-UP WASHER
26.
SEAL
13.
STEM
09.
O-RING
26.
BOOT
14.
SPACER
Figure 5C-7. Brake Valve (36U259)
5C-7
