Operation - Section 3 10/00 OM3023 Page 3-38 Operating Instructions 37. AISS/Auto Switch The AISS (Automatic Idle Selector Switch, 37, Figure 3-8) may be positioned to LOW or AUTO as desired. This switch is used by the operator to control the idle speed of the engine. 39. Starting Switch The Starting Switch (39, Figure 3-8) is a three-position key- switch: "OFF" Position - Key insertion/ withdrawal position - None of the electrical circuits activate in this position. Turn the switch to "OFF" to stop the engine. LOW position (button in/light "ON") is the "manual position" and is used when fine control movements are needed, such as when parking, or driving in/out of confined spaces.
"ON" - Lamp circuits activate in this position. "START" - At this key position, the starting motor will crank the engine. Release the key immediately after engine starts; the key will return automatically to "ON". AUTO position (button out/light "OFF") is used for normal operations. The fol- lowing conditions occur: Refer to “Starting The Engine” , earlier in this section. 1. When the machine is stopped, the idling speed is automatically set to LOW speed when the parking brake or retarder is ON. When the park- ing brake is released to start traveling, the idling speed is automatically set to HIGH speed. 40.
Pilot Lamp Bulb Check Switch Turn the starting switch (39) to "ON" and press the Pilot Lamp Bulb Check Switch (40) to check if bulbs will light. All pilot lamp bulbs should light. 2. If the coolant temperature is low, the idling speed is automatically set to HIGH speed to reduce the time taken for the warming up oper- ation. 38. Manual Starting Aid Switch This truck is equipped with an Automatic Cold Start Aid. 41. Rear Brake Pilot Lamp The Cold Starting Aid energizes the electric heaters in the engine intake manifold. The Rear Brake Pilot Lamp (41) lights up when the service brake is depressed or the retarder con- trol lever is pulled to actuate the rear brake.
Under normal conditions, there is no need to use this MANUAL switch. If the out- side temperature is below - 5°C (23F) and the prelube starter runs a long time, this manual switch can be pushed "IN" for 2-3 seconds before starting the engine to maintain engine pre- heating. 42. Body Float Caution Monitor When the dump body control lever is set to any position other than FLOAT, or the body is not seated on the frame, the Body Float Caution Monitor (42) lights up. Refer to “Starting The Engine in Cold Weather” , ear- lier in this section. When traveling, always set the lever to FLOAT posi- tion with the body seated. The Starting Aid Switch (38) is spring-loaded to the "OUT/OFF" position.
DO NOT PUSH COLD STARTING AID BUTTON AFTER ENGINE HAS STARTED! SERIOUS DAM- AGE TO ENGINE MAY OCCUR!