OM3223 Operation - Section 32 Operator Cab and Controls Page 32-5 INSTRUMENT PANEL Instrument panel (7, Figure 32-1) includes a wide variety of switches, gauges, and indicators. Refer to instrument panel and indicator lights for a detailed description of function and location of these compo- nents. WARNING ALARM BUZZER Warning alarm buzzer (10, Figure 32-1) will sound when activated by any one of several truck functions. Refer to instrument panel and indicator lights, for a detailed description of functions and indicators that will activate this alarm.
GRADE / SPEED WARNING CHART CAB RADIO Grade/speed warning chart (8, Figure 32-1) provides the recommended maximum truck speeds for descending various grades with a loaded truck. This panel will normally contain an AM/FM stereo (11, Figure 32-1). Refer to Section 7 for a more com- plete description of the radio and its functions. Indi- vidual customers may use this area for other purposes, such as a two-way communications radio. WARNING LIGHTS DIMMER CONTROL Warning lights dimmer control knob (12, Figure 32-1) permits the operator to adjust the brightness of the warning indicator lights. This control may not be on all model trucks.
WARNING INDICATOR LIGHT PANEL Warning indicator light panel (13, Figure 32-1) con- tains an array of indicator lights to provide the opera- tor with important status messages concerning selected truck functions. Refer to instrument panel and indicator lights, for a detailed description of these indicators. AIR CLEANER VACUUM GAUGES Air cleaner vacuum gauges (14, Figure 32-1) provide a continu- ous reading of maximum air cleaner restriction reached dur- ing operation. The air cleaner(s) should be serviced when the gauge(s) display the following maximum recommended restric- tion: FIGURE 32-6.
GRADE SPEED CHART The operator is to reference this chart before descending any grade with a loaded truck. Proper use of dynamic retarding will maintain a safe speed. Komatsu Engine: . . . . . . 25 inches of H2O vacuum. DO NOT exceed these recommended maximum speeds when descending grades with a loaded truck. NOTE: After service, push the reset button on the face of the gauge to allow the gauge to return to zero. This decal may change with optional truck equipment such as: wheel motor drive train ratios, retarder grids, tire sizes, etc. WINDSHIELD WIPERS Always refer to this decal in the operator’s cab, and follow these recommendations for truck operation.
Windshield wipers (15, Figure 32-1) are powered by an electric motor. Refer to operator cab and controls, for a location and description of the windshield wiper and washer controls. RADIO SPEAKERS Radio speakers (9, Figure 32-1) for the AM/FM ste- reo are located at the far left and right of the over- head panel.