Operating Instructions - Section 30 03/13 OM3040 Page 30-6 4. Turn the key switch to the ON position, but do not start the engine. AFTER THE ENGINE HAS STARTED After the engine has been started, operate at approx- imately 1000 rpm, until the coolant temperature gauge is indicating "normal" (green) range. a. Steering system pressure: Verify that the low steering pressure warning light is illuminated. If it is not illuminated, immediately notify maintenance personnel. Do not operate the truck until the problem is corrected. Become thoroughly familiar with the steering, brak- ing, and emergency controls. b. Steering accumulator pressure:
Verify that the low accumulator charge warning light is not illuminated and the warning buzzer is not sounding. If the warning light is illuminated and the buzzer is sounding, immediately notify maintenance personnel. Do not operate the truck until the problem is corrected. During the following safety checks, if actuation or release of any steering, brake or emergency control circuit does not appear normal, shut the engine down, immediately, and notify mainte- nance personnel. Do not operate the truck until the system in question is fully operational. Ensure the area around the truck is clear before testing. 5. Start the engine and allow the steering accumulators to fully charge.
Turn the steering wheel so that the front wheels are straight. Steering 6. Check the hydraulic tank oil level while the engine is on. 1. Test the truck steering in extreme right and left directions. If the steering system is not operat- ing properly, shut the engine off, immediately. Determine the problem, and repair before resuming operation. a. If the oil level is visible in center of the lower sight glass and does not cover the entire lower sight glass, the steering accumulators are adequately charged. Proceed to Step 7. b. If the oil level is below the lower sight glass, the steering accumulators are not adequately charged. Stop the engine and turn the key switch to the OFF position.
Immediately notify maintenance personnel. Do not operate the truck until the problem is corrected. NOTE: The steering and brake systems each have two accumulators that store energy and provide capability to steer and stop the truck in the event of an unexpected engine shutdown or pump failure. As part of the routine maintenance of the vehicle, one requirement to ensure proper operation of each system is to maintain proper accumulator nitrogen pre-charge. Refer to the shop manual for proper procedures when charging the accumulators. 7. If the truck passes this test, the emergency steering system is functioning properly.