Komatsu 830E Shop Manual page 48

A warning instruction is applied below the Parking Brake and the Rear Wheel Brake Lock switches, which are
located to the right of the steering column on the instrument panel. Pushing the top of the rocker-style switch turns
the function ON, pushing the bottom, turns it OFF.
The Parking Brake is spring applied and hydraulically released. It is designed to hold a stationary truck
when the engine is shutdown and keyswitch is turned "Off". The truck must be completely stopped
before applying the parking brake, or damage may occur to 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 keyswitch is "On" and Parking Brake switch is applied, the Parking Brake indi-
cator light (in Overhead Panel) will be illuminated.
NOTE: Do not use the parking brake at shovel or dump. With keyswitch "On" and engine running, sudden shock
caused by loading or dumping could cause the system's motion sensor to RELEASE the park brake.
The Wheel Brake Lock switch is for holding the truck while parked at the shovel during loading, or while
dumping. It applies the rear service brakes only. If the brake treadle valve does not operate, apply this
brake to stop the truck. Do NOT use this brake as a parking brake when leaving the truck. With engine
shut down, the hydraulic system will eventually bleed down, releasing the service brakes.
Attached to the exterior of the battery compartment is a dan-
ger plate. This plate stresses the need to keep from making
any sparks near the battery. When another battery or 24VDC
power source is used for auxiliary power, all switches must be
"Off" prior to making any connections. When connecting auxil-
iary power cables, positively maintain correct polarity; connect
the positive (+) posts together and then connect the negative
(-) lead of the auxiliary power cable to a good frame ground.
Do not connect to the negative posts of the truck battery
or near the battery box. This hookup completes the circuit
but minimizes danger of sparks near the batteries. Sulfuric
acid is corrosive and toxic. Use proper safety gear, goggles,
rubber gloves and rubber apron when handling and servicing
batteries.
A4-2 Warnings and Cautions A04046