OM3054 03/13 Operating Instructions - Section 30 Page 30-7 4. Turn the key switch to the ON position, but do not start the engine. AFTER THE ENGINE HAS STARTED If coolant temperature is below 50є C (122є F), the engine will operate at 1000 rpm in order to reach nor- mal operating temperature. When coolant tempera- ture rises above 50є C (122є F), the engine will return to normal low idle speed, 650 rpm. Refer to Auto- matic Idle Selector Switch in Section 32 for related information. 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. 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. In cold ambient conditions and when the engine is cold, the engine rpm will not increase above low idle speed until the engine controller determines it is safe to do so. This time delay will vary from 30 seconds to 11 minutes which allows the coolant and engine oil to warm up. 5.
Start the engine and allow the steering accumulators to fully charge. Turn the steering wheel so that the front wheels are straight. Become thoroughly familiar with the steering, brak- ing, and emergency controls. Perform the following checks to ensure safe truck operation before each shift. 6. Check the hydraulic tank oil level while the engine is on. 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.
During the following safety checks, if actuation or release of any steering, brake or emergency control circuit does not appear normal, shut the engine off, immediately. Notify maintenance per- sonnel. DO NOT operate the truck until the sys- tem in question is fully operational. Ensure the area around the truck is clear before testing. 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. 7. If the truck passes this test, the emergency steering system is functioning properly.