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 TM 55-1905-221-14-1
4-23. HELM UNIT AND STEERING WHEEL.
The helm unit and other valves control the direction and volume of flow of the hydraulic oil in the steering
system. The helm unit directs the oil 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:
Inspection
INITIAL SETUP:
Equipment
Condition
Paragraph
Condition Description
Test Equipment
NONE
NONE
Tools and Special Tools
Special Environmental Conditions
General Mechanic Tool Kit
NONE
Material/Parts
General Safety Instructions
NONE
NONE
Personnel Required
Troubleshooting Reference
Operator-Crew
NONE
(MOS 61B & C)
References
Approximate Time Required (minutes)
Inspection
5
4-65
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