MODEL 330 OPERATOR'S MANUAL - Peterbilt Motors Company

Using the Brake System
Power Steering Flow Switch: senses flow of power steering
fluid.
Power Steering Fluid Reservoir: stores power steering fluid
and offers a place to replenish when needed.
Power Steering Gear: assists the steering operation and
sends pressurized power steering fluid to the brake booster.
Power Steering Pump: draws power steering fluid from the
reservoir and sends it to the power steering gear.
Warning Buzzer: sounds when either power steering fluid
flow is interrupted or when a pressure differential is present
between the primary and secondary brake fluid pressure.
Either case adversely affects braking operation.
Brake Warning Lamp
When the brake warning lamp comes on, it indicates a malfunction
in the brake system. Possible malfunctions include
loss of hydraulic pressure from the power steering circuit or a
pressure differential between the primary and secondary
brake circuits.
Operating Instructions
WARNING! Do not operate the vehicle if the
brake light or buzzer comes on. The light or
buzzer indicates a failure in one of the brake
components/system. Drive your vehicle to the
side of the road immediately. Failure to do this
may lead to an accident and severe injury.
0
!
BRAKE
MIRROR
HEAT
LOW
WATER
WATER
If the buzzer sounds while driving, or if the BRAKE light
comes on, do the following:
OIL
SERVICE BRAKE WARNING INDICATOR
– 88 – PB1318 3/01 Model 330