Operation - Section 32 OM3223 Page 32-14 Operator Cab and Controls Engine Cold Weather Start- ing Aid (Optional) Wheel Brake Lock Control Wheel brake lock (12) is to be used with the engine on for dumping and loading operations only. The brake lock switch actuates the hydraulic brake system which locks the rear wheel service brakes only. When pulling into the shovel or dump area, stop the truck using the foot-operated service brake pedal. When the truck is completely stopped and in 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 starting aid switch (8) is spring-loaded to the OFF posi- tion. Use only when the ambi- ent 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 engine starting in cold weather. Move the engine starting aid switch to the ON position while cranking engine, for three seconds maximum, and then release engine starting aid. If the engine does not start, wait at least fifteen seconds before repeating the procedure. Refer to Operating Instructions, for more specific operating details. Use at the shovel and dump only to hold the truck in position.
Rotating Beacon Light Switch (Optional) Do not use this switch to stop the truck, unless the service brake pedal is inoperative. Use of this switch applies rear service brakes at full, unmod- ulated pressure! If the truck is equipped with the optional rotating beacon light (9), it will be activated by this rocker- type switch when it is pressed toward the ON position. Do not use the brake lock for parking. With the engine stopped, hydraulic pressure will bleed down, allowing the brakes to release! Heated Mirror Switch (Optional) If the truck is equipped with the optional heated mirror (10), it will be activated by this rocker-type switch when it is pressed toward the ON position.
Leakage Test Switch (Trolley Option Only) system and the truck chassis. truck can still be operated in the diesel mode. To reset, after the trolley fault indicator lamp turns on, move the master control switch to the trolley position for a minimum of one second, and then back to the DIESEL position. sudden shock caused by loading or dumping could cause the system's motion sensor to release the park brake. Parking Brake Control ion Only) The parking brake (13) is spring applied rovides a means and hydraulically released. It is designed ay circuitry of the to hold a stationary truck when the signed to react to engine is turned off and key switch is assist propulsion turned OFF.
The truck must be completely stopped before applying the parking brake, or damage may ore operating the occur to the parking brake. To apply the parking ntrol switch in the brake, press the rocker switch toward the on symbol. rrent test switch To release the parking brake, move parking brake r four seconds. If control (13) toward the off symbol. When the key e trolley fault indi- switch is ON and the parking brake switch is applied, n on. If the light the parking brake indicator light (A3, Overhead e personnel. The Panel) will be illuminated. sel mode. NOTE: Do not use the parking brake at the shovel or tor lamp turns on, dump. With the key switch ON and the engine on,