Operation - Section 32 OM3241 Page 32-14 Operator Cab and Controls Cab air conditioner/heater vents (7, Figure 32-10) are spherically mounted and may be directed by the oper- ator to provide the most comfortable cabin air flow. Cab Air Conditioner/Heater Vents Wheel Brake Lock Switch Wheel brake lock switch (12, Figure 32- 10) must only be used when the engine is on. Use this function during dumping and loading. When approaching the shovel or dump area, stop the truck using the service brake pedal. When the truck is completely stopped and in the loading position, apply the brake lock by pressing the rocker switch toward the ON symbol.
To release, press the rocker switch toward the OFF symbol. Engine Cold Weather Starting Aid Switch Optional engine cold weather starting aid switch (8, Figure 32-10) is spring-loaded to the OFF position. Use only when the ambient temperature is below 10°C (50°F). When the switch is held in the ON position, ether is injected into the engine intake manifold to aid the engine starting in cold weather. For additional information, refer to Section 30, Oper- ating Instructions - Engine Start-Up. Use the brake lock at the shovel and the dump to hold the truck in position. DO NOT use the brake lock to stop the truck, unless the foot-operated treadle valve does not work.
Use of this switch applies the rear service brakes with unmodulated pressure! DO NOT use the brake lock for parking. When the engine is stopped, hydraulic pressure will dissi- pate, allowing the brakes to release! Rotating Beacon Light Switch Press rotating beacon light switch (9, Figure 32-10) to the ON position to activate the rotat- ing beacon. This is an optional feature. Heated Mirror Switch Press heated mirror switch (10, Figure 32-10) to activate the heat- ing element in the mirrors. This is an optional feature. Leakage Test Switch (Trolley Option Only) system and the truck chassis. operated in the diesel mode. brake. for a minimum of one second, and then back to the DIESEL position.
ion Only) Parking Brake Switch rovides a means Parking brake switch (13, Figure 32-10) ay circuitry of the is spring-applied and hydraulically signed to react to released. It is designed to hold the truck assist propulsion stationary when the engine is shut off and the key switch is turned OFF. The truck must be completely stopped before applying the parking ore operating the brake. To apply the parking brake, press the rocker ntrol switch in the switch toward the ON symbol. To release the parking rrent test switch brake, press the rocker switch toward the OFF sym- r four seconds. If bol.
When the key switch is ON and the parking e trolley fault indi- brake switch is applied, parking brake indicator light does not turn on, (A3, overhead panel) will be illuminated. truck can still be NOTE: DO NOT use the parking brake at the shovel or dump. With the key switch ON and the engine on, tor lamp turns on, sudden shock caused by loading or dumping could he trolley position cause the system's motion sensor to release the park then back to the