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TM 9-2320-360-20-1
1-16. STEERING SYSTEM
The steering system uses two steering axles, one at the front (No. 1) (1) and one at the rear (No. 4) (2). Each axle turns
in response to turning the steering wheel (3) in the cab.
Steering power is generated by a steering pump (4) driven directly at the engine providing pressure to two steering gears
(5), one at each steering axle. The steering pump delivers fluid to enable the operator to turn the wheels of a fully-loaded
truck. An interconnected series of shaft linkages rotate with hydraulic power assist to turn the two axles. In the event of
main steering system failure, an auxiliary steering pump (5.1) connected to the transfer case provides power steering.
As the steering wheel is turned, the rotational motion of the upper steering assembly shafts (6) is translated at a tee gear
box (7) below the cab to both the front and rear power steering gears (8). A steering reduction gear (8.1) reduces the
steering angle on axle no. 4. The steering gears multiply the rotational force to a pair of drag links (9) and four axle
steering arms that apply directional motion to turn the axles.
In the event a steering line (10) to no. 4 steering axle is severed or fluid leaks from the system (Power steering is
inoperable.), the truck can be steered for short distances in emergency situations.
Change 1 1-7
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