Vehicle Operation Systems (Cont)
1-18. POWER STEERING HYDRAULIC SYSTEM.
Figure 1-20 shows the
power steering hydraulic system. Power is supplied to the main steering gear (1)
by an engine driven pump (2) (except Model M984A1). The fluid reservoir (3) is
shared with the main hydraulic system. The steering wheel (4) rotates a gear
that positions a spool in the main steering gear. This motion is hydraulically sent
to a piston in the slave gear (5) causing it to follow the rotation of the main
steering gear. The main gear pitman arm (6) is mechanically connected to the
slave gear pitman arm (7). These pitman arms move the steering mechanism on
the front axles (8) left or right causing the vehicle to steer left or right.
On Model M984A1, the power is supplied to the main steering gear (1) by an
engine driven steering/tensioner pump (9).
Figure 1-20. Power Steering Hydraulic System Components Location.