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Operator Cab And Controls - Section 32
Page 32-20
Indicator lights that are amber (yellow) in color alert
the operator that the indicated truck function requires
some precaution when lighted.
Indicator lights that are red in color alert the operator
that the indicated truck function requires immediate
action by the operator. Safely stop the truck and
notify maintenance personnel.
DO NOT OPERATE THE TRUCK WITH A RED
WARNING LIGHT ILLUMINATED!
Refer to Figure 32-9 and the descriptions below for
explanations of the symbols. Location of the symbols
is described by rows (A - E) and columns (1 - 6).
A1. High Brake Oil Temperature
This red warning light indicates
that the brake oil temperature is
too high. The low brake pressure
warning light will also illuminate.
If these lights come on, the
operator should safely stop the
truck, move the directional control
lever to PARK and operate the engine at 1200 - 1500
rpm to reduce system temperature.
If temperature gauge (22, Figure 32-8) does not
move into the green range after a few minutes, and
the warning lights do not go out, turn off the engine
and notify maintenance personnel immediately.
If temperature gauge does not move into the
green range after a few minutes, and the red
overhead indicator light does not go out, stop the
engine
and
notify
maintenance
immediately.
B1. Low Steering Pressure
When the key switch is turned ON,
this red warning light will illuminate
and the warning buzzer will sound
until the steering system hydraulic
pressure reaches 15 860 kPa (2,300
psi). Both will remain on until the
accumulator has been charged.
During truck operation, the low steering pressure
warning light, low brake pressure warning light, and
warning buzzer will turn on if steering system
hydraulic pressure drops below 15 860 kPa (2,300
psi).
• If the light illuminates momentarily (flickers) while
turning the steering wheel at low truck speed and
low engine rpm, this may be considered normal
and truck operation may continue.
• If the indicator lights illuminate at a higher truck
speed and high engine rpm, do not operate the
truck.
If the low steering warning light continues to
illuminate and the alarm continues to sound, low
steering pressure is indicated. The remaining
pressure in the accumulators allows the operator
to control the truck to a stop. If the oil pressure
continues to decrease, the brake auto-apply
feature will activate and the service brakes will
apply automatically to stop the truck. Do not
attempt further operation until the malfunction is
located and corrected.
1. Stop the truck as quickly as possible by using
the foot pedal to apply the service brakes. If
possible, steer the truck to the side of the road
personnel
while braking.
2. As soon as the truck has stopped moving, shift
the directional control lever to PARK. This will
apply the parking brake.
3. Slowly release the service brakes to check the
capacity of the parking brake. If the parking
brake can not hold the truck stationary, apply
the service brakes and hold them ON. DO NOT
turn the key switch OFF, and do not release the
service brakes.
4. Notify maintenance personnel immediately.
5. If the truck is on level ground, or if the parking
brake can hold the truck stationary and the truck
is in a stable condition, it is then OK to turn the
key switch OFF.
8/11 OM3245
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Troubleshooting
