Safety - Section 22 OM2214 Page 22-2 Warnings and Cautions 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. Attached to the exterior of the battery compartment is a danger plate. This plate stresses the importance of not creating 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 auxiliary power cables, positively maintain correct polarity; connect the positive (+) posts together and then con- nect the negative (-) lead of the auxiliary power cable to a good frame ground. Do not connect to the nega- tive posts of the truck battery or near the battery box. This hookup completes the circuit but minimizes dan- ger 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. The parking brake is spring applied and hydraulically released. It is designed to hold a stationary truck when the engine is shut down and key switch is turned OFF.
The truck must be completely stopped before apply- ing the parking brake, or damage may occur to park- ing 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 parking brake switch is applied, the parking brake indicator light (A3, overhead panel) will be illuminated. NOTE: Do not use the parking brake at the shovel or the dump. With the key switch ON and the 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 dur- ing 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 the engine shut down, the hydraulic system will eventually bleed down, releasing the service brakes. This plate is placed on both battery boxes and near the battery disconnect switches to indicate that the battery system (24vdc) is a negative (-) ground sys- tem.
These decals are placed above the battery discon- nect switches on the right side of the front bumper to indicate OFF and ON positions of the switches.