OM3216 3/10 Operator Cab and Controls - Section 32 Page 32-13 LOWER RH SWITCH PANEL FIGURE 32-9. LOWER RH SWITCH PANEL 1. Key Switch 2. Ether Starting Aid Switch (Optional) 3. ASR Cut Switch 4. ARSC Switch 5. AISS Switch 6. Auxiliary Brake Switch The lower RH switch panel, located to the right of the steering wheel, contains the following: START - With the transmission selector lever in the NEUTRAL position, rotate the key switch fully clockwise to the START position, and hold this position until the engine starts (see NOTE below). The START posi- tion is spring loaded to return to RUN when the key is released.
Key Switch Key switch (1, Figure 32-9) is a four position (ACC, OFF, RUN, START) switch. OFF - Key insertion/withdrawal position When the key slot is in the verti- cal position, the electrical sys- tem is off and no electrical devices are energized. NOTE: The engine start circuit is equipped with a engine prelube system. A noticeable time delay will occur (while engine lube oil passages are being filled) before starter engagement and engine cranking will begin. The colder the engine oil temperature, the longer the time delay will be.
In addition, if the truck is also equipped with an engine starting aid for cold weather starting, the engine prelube system should be engaged first for 5-10 seconds, or until the starter is engaged, before activating the engine starting aid. Use this key position to stop the engine when it is operating. ACC- When the key is rotated counterclockwise from the OFF position, it is in the accessory (ACC) position. This position is used to power certain accessories such as the radio when there is no intention of starting the engine. RUN - When the switch is rotated one position clockwise, it is in the RUN position and all elec- trical circuits (except START) are energized.