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 TM 55-1905-221-14-2
5.7.4. STEERING SYSTEM HELM UNIT.
The helm unit and other valves control the direction and volume of flow of the hydraulic fluid in the steering system.
The helm unit directs the fluid to one side or the other of the cylinders, and limits the flow according to the speed at which
the steering wheel is turned. In the event of pump failure, the helm unit will also act as a pump when turned manually.
This task covers:
a. Removal
b. Replacement
c. Installation
INITIAL SETUP
Test Equipment
References
NONE
NONE
Equipment
Special Tools
Condition Condition Description
NONE
NONE
Tools
General Mechanic's Tool Kit
NSN 5180-00-629-9783
Materials/Parts
Special Environmental Conditions
Cleaning solvent
NONE
Fed. Spec. P-D-680
Clean cloths
Personnel Required
General Safety Instructions
MOS 61C10
Observe WARNING in procedure.
5-127
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