Operation - Section 3 OM3017.3 Page 3-22 Instrument Panel and Indicator Lights (21, Figure 3-7) TACHOMETER (25, Figure 3-7) PARKING BRAKE The tachometer registers engine crankshaft speed in revolutions per minute (RPM). The parking brake indicator will glow when the parking brake is applied. Do not attempt to drive truck with parking brake applied. Governed RPM: Low Idle - 750 RPM (650 RPM with DDEC Fuel Saver) (26, Figure 3-7) (OPTIONAL) ACCUMULATOR BOOSTER Detroit Diesel – High Idle, No load — 2040 ± 20 RPM (1920 RPM with DDEC) Indicates the accumulator booster system is function- ing.
Cummins – High Idle, No load — 2150 RPM Maximum (27, Figure 3-7) MANUAL BACK UP LIGHT Indicates backup lights are "On". Works with Manual Backup Light switch. CAUTION INDICATOR LIGHTS (22 through 33, Figure 3-7) Indicator lights (22) through (33) are AMBER in color, and alert the operator of the status of truck functions and that some precaution may be required when lighted. (28, Figure 3-7) LOW FUEL (OPTIONAL) Indicates low fuel in fuel tank. Light will come on and buzzer will sound. Approximately 25 gal. (95 l) of useable fuel is left when light comes on.
(22, Figure 3-7) DYNAMIC RETARDING The dynamic retarding indicator light glows when the retarder pedal is operated, RSC (Retarder Speed Con- trol) is activated or the automatic overspeed retarding circuit is energized, indicating the dynamic retarding function of the truck is operating. (29, Figure 3-7) HIGH PRESSURE FILTER (OPTIONAL) This light indicates a restriction in the high pressure filter assembly for either the steering or hoist circuit. This light will come on before filters start to bypass. Notify maintenance personnel at earliest opportunity after light comes on. (23, Figure 3-7) BODY UP The Body Up indicator, when lit, shows that the body is not completely down on the frame.
Truck should not be driven until body is down and light is off. (24, Figure 3-7) SERVICE BRAKE The service brake indicator light will glow when the service brake pedal is applied or when wheel brake lock (or emergency brake, if equipped) is applied. Do not attempt to drive truck from stopped position with service brakes applied.