OM2231 Safety - Section 22
Warnings and Cautions Page 22-5
The parking brake is spring-applied and hydraulically
released. It is designed to hold a stationary truck
when the engine is off. The truck must be completely
stopped before applying the parking brake, or dam-
age may occur to the parking brake. To apply the
parking brake, press the rocker switch toward the ON
symbol. To release the parking brake, press the
rocker switch toward the OFF symbol. When the key
switch is ON and the parking brake switch is applied,
parking brake indicator light (A3, overhead panel) will
be illuminated.
NOTE: DO NOT use the parking brake when loading
or dumping.
The brake lock switch is for holding the truck while
parked at the shovel during loading or while dump-
ing. It applies the rear service brakes only. If the
brake pedal malfunctions while the truck is in motion,
apply the brake lock to stop the truck. DO NOT use
this brake as a parking brake when leaving the truck.
With the engine off, the hydraulic system will depres-
surize, releasing the service brakes.
High voltage danger plates and caution plates are
attached to the doors of the electrical control cabinet.
The high voltage plate is also attached to the blown
grid housing, extended range housing, rectifier hous-
ing, inlet duct, and rear hatch cover.
Before arc welding on the truck, disconnect the posi-
tive and negative battery cables of the vehicle. Fail-
ure to do so may seriously damage the battery and
electrical equipment. Disconnect the battery charging
alternator lead wire and isolate the electronic control
components before welding. It is not necessary to
disconnect or remove any control circuit cards or any
of the Alarm Indicating Device (AID) circuit control
cards.
Fasten the welding machine ground (-) lead to the
piece being welded. The grounding clamp must be
attached as near as possible to the weld area. DO
NOT allow welding current to pass through the ball
bearings, roller bearings, suspensions, or hydraulic
cylinders. DO NOT lay welding cables over or near
the vehicle electrical harnesses. The welding voltage
could be induced into the electrical harness and pos-
sibly cause damage to the components.
This plate is mounted on the top side of the blown
grid housings. Stepping or standing here may result
in serious personal injury.
A decal plate is located on top of the center cross
tube. The decal provides the operator or technician
with the hook-up procedure for dumping a loaded,
disabled truck, by using a functional truck for hydrau-
lic power.
Refer to the service manual for additional instructions
for using this procedure.
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