OM3226 Operation - Section 32 Operator Cab and Controls Page 32-17 INDICATOR LIGHT FUNCTIONS Amber indicator lights alert the operator the indicated truck function requires some precaution when lighted. If the low steering warning light continues to illu- minate and the alarm continues to sound, low steering pressure is indicated. The remaining pressure in the accumulators allows the operator to control the truck to a stop. DO NOT attempt further operation until the malfunction is located and corrected. Red indicator lights alert the operator the indicated truck function requires immediate action. Safely stop the truck and shut the engine off.
To prevent possible death or severe injury, DO NOT operate the truck with a red warning light illuminated. Low Accumulator Precharge Pressure Warning Refer to Figure 32-12 and the descriptions below for explanations of the symbols. Location of the symbols is described by rows (A-E) and columns (1-6). Low accumulator precharge pressure warning light (C1), if illu- minated, indicates low nitrogen precharge for the steering accu- mulator(s). To check for proper accumulator nitrogen precharge, the engine must be stopped and the hydraulic system completely depressurized. Then turn the key switch to the RUN position. The warning light will not illuminate if the system is properly charged.
The warning light will flash if the nitrogen precharge within the accumula- tor(s) is below 7585 ± 310 kPa (1100 ± 45 psi.) High Hydraulic Oil Temperature High hydraulic oil temperature (A1) warning light indicates high oil temperature in the hydraulic tank. Continued operation could damage the components in the hydraulic system. Notify mainte- nance personnel immediately. The light turns on when hydraulic oil reaches 107°C (225°F). Low Steering Pressure When the key switch is turned ON, low steering pressure warn- ing light (B1) will illuminate until the steering system hydraulic pressure reaches 14.7 kPa (2100 psi).
The warning horn will also turn on, and both will remain on until the accumulator has been charged. If the low accumulator precharge warning light flashes, notify maintenance personnel. To pre- vent possible death or severe injury, DO NOT attempt further operation until the accumulators have been recharged with nitrogen to 9653 kPa (1400 psi.) Sufficient energy for emergency steer- ing may not be available if the system is not properly charged.
During truck operation, the low steering pressure warning light and warning horn will sound if the steer- ing system hydraulic pressure drops below 14.7 kPa (2100 psi.) If the light illuminates momentarily (flickers) while turning the steering wheel at low truck speed and low engine rpm, this may be considered normal, and the truck operation may continue. If the indicator light illuminates at higher truck speed and high engine rpm, stop the truck and notify maintenance.