CONTROL VALVES
SUBSECTION 5C
01. CAPSCREW
02. CONNECTOR
03. TEE
04. ELBOW
05. NUT
06. REDUCER
07. REDUCER
08. N U T
09. ELBOW
10. TEE
11. CONNECTOR
12. PLUG
13. MANIFOLD
14. PIN
15. SPRING
16. BALL
17. SETSCREW
18. NUT
19. LEVER
20. KNOB
21. SWITCH
22. KNOB
23. LEVER
24. LEVER
25. O-RING
26. VALVE
27. PIN
28. SETSCREW
29. JAM NUT
TA5015643
Figure 5C- 1. Control Valve Assembly
CRAWLER EXTEND/RETRACT VALVE (36Z1077)
4. Connect the battery ground cable. Start the engine and
operate the controls to check the operation of the valve.
DESCRIPTION. This valve is a manually operated, three-
Check all hydraulic lines for Ieakage.
position, 4-way directional valve. When operated it con-
trols the flow of fluid to the crawl extensrion cylinders.The
5. With the valve stack assembled, installed and adjusted
valve iS composed of a pressure passage used to carry fluid
as given in step 1, and control pressureo at 1680 psi 40 psi.
to the cylinder ports when the spools are shifted. There iS a
detent each valve and adjust with setscrew (03. Figure
by-pass passage which permits flow directly to the outlet
5C-3). The force at the control handle should be 10 lbs. -0 +2
when the spools are not being operated and there is a tank
lbs to move the handle out of detent. When adjusted prop-
passage which carries fluid to the outlet from the cylinder
erly, secure in place with jam nut (05, Figure 5C-3). Tighten
ports.
the jam nut to 22 ft-Ibs. torque.
5C-2
Change 1
