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TM 5-4210-220-12
1-16. STEERING SYSTEM. - Continued
b. Steering Gear.
(1) Inside the steering gear, fluid is distributed to both ends of a piston assembly, (see fig. 1-29) and equal
pressure is maintained while the steering is neutral. When the steering wheel is turned, the motion will push the valve
assembly toward one end of the piston. This action will close off oil flow to that end and increase the flow to the other
end. The hydraulic pressure from this flow will assist moving the piston and thereby turn the gear. If the piston is moved
to its extreme limit, i e, the front wheels are turned to maximum angle, a plunger operated relief valve will open and
relieve the hydraulic pressure. A relief valve is provided at each end of the piston.
(2) When steering action is stopped or returned to neutral, spring action from disc-type springs at both ends
of the valve body will center the valve and equalize the oil pressure on both sides of the piston.
Figure 1-29. Power Steering Gear
1-35
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