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TM 10-3930-659-20
12-20. SECONDARY STEERING MANIFOLD PRIMARY CHECK VALVE LEAKAGE TEST.
This task covers:
a.
Removal
b.
Installation
INITIAL SETUP:
Equipment Conditions:
Materials/Parts:
•
Parking brake set (see TM 10-3930-659-10).
•
Rags (Item 27, Appendix C)
•
Frame locking bar Installed (see TM 10-3930- •
Two preformed packings
659-10).
•
Hydraulic system warmed to operating
Personnel Required: Two
temperature (see paragraph 2-29).
•
Right transmission side guard removed (see References:
paragraph 14-7).
•
TM 10-3930-659-10
Tools/Test Equipment:
•
General mechanic's tool kit (Item 44, Appendix F)
•
Cap (Item 6, Appendix F)
NOTE
A suitable container should be used to catch any draining hydraulic fluid. Ensure that all spills
are properly cleaned.
LEAKAGE TEST
1.
Remove hose (3) and preformed packing (2) from priority valve (1). Discard preformed packing.
2.
Install preformed packing (5) and cap (4) on priority valve (1).
CAUTION
DO NOT operate secondary steering pump and secondary steering pump motor for more than 15
seconds. Failure to follow this caution may damage secondary steering pump and secondary
steering pump motor.
NOTE
Ensure that engine does not start when operating Ignition switch.
3.
Turn ignition switch to START position and release to activate secondary steering pump.
4.
If hose (3) leaks a steady stream of hydraulic fluid, replace secondary steering manifold (see paragraph 12-22).
5.
Remove cap (4) and preformed packing (5) from priority valve (1). Discard preformed packing.
6.
Install new preformed packing (2) and hose (3) on priority valve (1).
12-54
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