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TM 10-3930-659-20
12-21. SECONDARY STEERING MANIFOLD SECONDARY 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-
•
One preformed packing
659-10).
•
Hydraulic system warmed to operating
Personnel Required: Two
temperature (see paragraph 2-29).
•
Cab skirts removed (see paragraph 14-6).
References:
Tools/Test Equipment:
•
TM 10-3930-659-10
•
General mechanic's tool kit (Item 44, Appendix F)
•
Plug (Item 29, 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 (4)
from check valve (1). Discard preformed
packing.
2.
Install plug (2) on hose (3).
3.
Place suitable container (5) under check valve
(1).
4.
Start engine and run at slow engine idle speed
(see TM 10-3930-659-10). If check valve (1)
leaks a steady stream of hydraulic fluid, replace
secondary steering manifold (see paragraph 12-
22).
5.
Remove plug (2) from hose (3).
6.
Install new preformed packing (4) and hose (3)
on check valve (1).
FOLLOW-ON TASKS:
•
Install cab skirts (see paragraph 14-6).
•
Remove frame locking bar (see TM 10
3930-659-10).
12-56
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