Driver Controls and Instruments the engine and determine the cause. Refer to the ve- hicle workshop manual for repair procedures. shifting the transmission and keeping the engine in the appropriate rpm range. For low idle and rated rpm, refer to the engine identification plate. IMPORTANT: If the warning system does not acti- vate when the ignition is turned on, repair the sys- tem to provide warning protection for oil pressure, coolant temperature, and the brake system. Meritor WABCO ® Antilock Braking System (ABS), Air Brake Systems The ABS warning light comes on after the engine is started. The warning light goes out only if all of the ABS components are working properly. IMPORTANT:
If the ABS warning light does not work as described above, or comes on while driv- ing, repair the ABS system immediately to ensure full antilock braking capability. Refer to the vehicle workshop manual for troubleshooting procedures. 10/01/98 f601443a Refer to the brake system operating instructions in Chapter 7 for more instructions. Fig. 3.15, Tachometer The tachometer may include an engine hour meter. An engine hour meter records continuous operating hours of the engine. In cases where actual mileage does not indicate overall usage, maintenance and lubrication in- tervals for the engine and engine-operated equipment can be determined by operating hours.
Instruments Tachometer A tachometer (see Fig. 3.15 ) indicates engine speed in revolutions per minute (rpm), and serves as a guide for 3.12