SRT45 Off-Highway Truck
3-24
Safety, Operation and Maintenance Manual
3.12 Steering
The steering wheel position can be adjusted
as required for the most convenient operating
position. To adjust, pull out adjustment lock
and tilt steering wheel up or down as desired;
release lever to lock adjustment.
The steering system provides full-time
hydraulic power with a continuous-running
pump and a pressurized accumulator. The
accumulator helps maintain a constant flow
of hydraulic power to operate the steering
cylinders (Fig 3-14, 3-15).
To steer the front wheels, rotate the steering
wheel in the desired direction to the required
radius of turn. The front wheels will turn only
as the steering wheel is turned and at a rate of
turning directly proportional to steering wheel
speed. The front wheels will stop and hold
position when the steering wheel is stopped.
To return the front wheels to the straight ahead
position or to the opposite direction, turn the
steering wheel in the opposite direction.
WARNING
In the event of loss of steering pump
output pressure, a fully-pressurize
accumulator provides a maximum
of two lock to lock turns of the front
wheels. A red warning indicator on
the instrument panel illuminates and a
buzzer sounds when steering pressure
falls below 11.5MPa (1660 pound/in2).
If this warning indicator illuminates,
indicating a loss of steering power, the
machine must be stopped immediately
and no further operation attempted
u n t i l t h e f a u l t i s c o r r e c t e d . T h e
accumulator slowly bleeds down after
engine shut-off to prevent accidental
s t e e r i n g . H o w e v e r, a c c u m u l a t o r
pressure should be dissipate after
engine shut-off by turning the steering
Adjusting rotary
knob of high-low
Adjusting rotary
knob of front-rear
Fig 3.15
Fig 3.14
Trun left
Trun right
Controls and Operating
