TM 10-3930-671-10 Table 2-1.  Controls and Indicators - CONT. Key Control/Indicator Function 7 Glow Plug Button Used to energize engine glow plugs while starting engine in cold weather. 8 Transmission Indicates temperature of transmission oil.  Normal operating Temperature Gauge temperature should be 210°F (99°C). 9 Accelerator Pedal Used to control speed of engine, truck, and all upright/carriage/fork functions. 10 Service Brake Pedal Used to stop truck, especially going up or down a ramp. 11 Inching Brake Pedal Used to keep travel speed low while maintaining high engine rpm. 12 Instrument Panel Panel contains ON/OFF switches for Front/Rear Flood Lights, Ignition Switch, Warning Indicator Light Cluster, Fuel Gauge, Hour Meter, and Seat Belt Warning Light. 2-3