Komatsu — DISCUSSION OF ITEMS 1-29, FIGURE 3-8

OM3006.3 04/98 Operation - Section 3 Instrument Panel and Indicators Page 3-27 Air Pressure Monitor (NOT USED) Retarder Oil Temperature Monitor The Air Pressure Monitor (1, Figure 3-8) is NOT USED on this truck. The Retarder Oil Temperature Monitor lamp (7, Figure 3-8) warns that the retarder oil temperature has risen. Air Pressure Gauge (NOT USED) If it flashes, stop the machine, return the Transmission Range Selector lever to Neutral, and run the engine under no load at 1200-1500 RPM until the warning lamp goes out. The Air Pressure Gauge (2, Figure 3-8) is NOT USED on this truck.

Coolant Temperature Monitor Retarder Oil Temperature Gauge The Retarder Oil Temperature Gauge (8, Figure 3-8) indicates the temperature of the retarder cooling oil. During normal operation, a lamp in the green range should light up. The Coolant Temperature Monitor (3, Fig- ure 3-8) indicates a rise in the cooling water temperature. If the lamp in the red range lights up during operation, the alarm buzzer will sound, the central warning lamp will flash, and the retarder oil temperature monitor lamp will flash at the same time.

If this happens, stop the machine, return the Transmission Range Selector lever to Neutral, and run the engine at 1200-1500 RPM under no load, and wait until the lamps in the green range light up. When the monitor lamp flashes, run the engine with no load at 1200-1500 RPM until the green range of the engine water temperature gauge lights. Engine Cooling Water Temperature Gauge The Engine Cooling Water Temperature Gauge (4, Figure 3-8) indicates the temperature of the cooling water. If the temperature is normal during operation, the green range will light.

If the red range lights during operation, the alarm buzzer will sound, the central warning lamp will flash and the coolant temperature monitor lamp will flash at the same time. If this occurs, stop the machine and run the engine with no load at 1200-1500 RPM until the green range lights. Left Turn Signal Pilot Lamp When the turn signal lever is moved down- wards, the left turn signal pilot lamp (9, Figure 3-8) flashes. High Beam Pilot Lamp Torque Converter Oil Temperature Monitor The High Beam Pilot Lamp (10, Figure 3-8) lights up when the head lamps are on high beam. The Torque Converter Oil Temperature Monitor (5, Figure 3-8) indicates a rise in the torque converter oil temperature.

Right Turn Signal Pilot Lamp When the monitor lamp flashes, stop the machine and run the engine with no load at 1200-1500 RPM until the green range of the temperature gauge lights. When the turn signal lever is moved up- wards, the right turn signal pilot lamp (11, Figure 3-8) flashes. Torque Converter Oil Temperature Gauge The Torque Converter Oil Temperature Gauge (6, Fig- ure 3-8) indicates the temperature of the torque con- verter oil. If the temperature is normal during operation, the green range will light.

If the red range lights during operation, the alarm buzzer will sound, the central warning lamp will light up and the torque converter oil temperature monitor lamp will flash at the same time. If this occurs, stop the machine and run the engine with no load at 1200-1500 RPM until the green range lights. Speedometer The digital Speedometer (12, Figure 3-8) indicates the travel speed of the truck in miles per hour, or kilometers per hour. This figure will appear momentarily when the keyswitch is first turned ‘‘On’’ to demonstate that all segments are working.