Operation - Section 3 OM3005.3 7/96 Page 3-22 Instrument Panel and Controls ( 44) Transmission Cooler Filter (49) Air Cleaner Indicator (Optional) The transmission Cooler Filter light alerts the operator that oil passing through the elements in the filter assembly is being restricted. Due to cold oil, the warning light may come on at startup and remain lit until the oil is warm. Occasionally, during operation the warning light may flicker on and off; but when the light comes on and remains on, the filters should be changed as soon as possible.
If truck is equipped with OPTIONAL Air Cleaner Indicator System, this indicator light (when illuminated) in- dicates that the MAXIMUM recom- mended restriction for the air cleaner has been exceeded. (50) Lamp Test Switch The lamp test switch is provided for the operator to test the warning and indicator lights before engine start- up. The key switch is turned to the "Run" position and the lamp test push button switch is depressed to the "On" position. This action will complete a circuit to the warning and indicator lights. (45) Low Accumulator Precharge Warning Light The Low Accumulator Precharge Warning light indicates low steering accumulator nitrogen precharge pressure.
If the nitrogen precharge pressure within the accumulators falls below 850 psi (5.9 MPa) the warning light will illuminate. (51) Alarm Horn The alarm horn is a signaling device used to alert the operator of a malfunction within a system. The alarm horn will sound if low steering pressure and/or low brake pressure is detected. Stop the truck. Do not attempt further operation until the accumulator has been recharged to 1050 ± 25 psi (7.2-7.5 MPa). When the alarm horn sounds during operation, a warn- ing light (39 or 41) will come "On". The warning light will be the operator’s visual aid in determining which sys- tem is malfunctioning.
(46) Automatic Fire Control (Optional) If truck is equipped with OPTIONAL Fire Control System, this indicator light (when illuminated) indicates that the system has been activated. (47) Low Fuel Indicator (Optional) This low fuel indicator will illuminate when the usable fuel remaining in the tank is approximately 2-3 gal- lons (8-11 liters). A warning buzzer will also sound. Fuel should be added to the tank as soon as possible. (48) Reserved for future accessories.