Quantcast 6.  LOSS OF MIDDLE FRAME SAFE LOWERING FUNCTION (CONT) - TM-9-2320-364-20-3_432

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Page Title: 6. LOSS OF MIDDLE FRAME SAFE LOWERING FUNCTION (CONT)
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OPERATION TEST - TM-9-2320-364-20-3_431
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TM-9-2320-364-20-3 Truck Tractor M1074 and M1075 Palletized Load System (PLS) Manual
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VOLTAGE TEST - TM-9-2320-364-20-3_433
TM 9-2320-364-20-3 2-2310 Go to Step 3 of this Fault. 6.  LOSS OF MIDDLE FRAME SAFE LOWERING FUNCTION (CONT). Middle frame operates in   manual mode. Middle frame safe lowering   button faulty. Wire 1479 faulty. Wire 1478 faulty. Rectifier faulty. Wire 1480 faulty. Wire 1435 faulty. Transit valve faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If component supplying voltage to main junction box terminal 9 is loose, faulty, or shorted to ground, 22 to 28 vdc will not be present at safe lowering buttons. NO Go to Step 1 of Fault 4 of this chapter. 3. Are 22 to 28 vdc measured at main junction box terminal 9 with ENGINE switch in the ON position? Go to Step 8 of this Fault. 2. YES Middle frame operates in   manual mode. Middle frame safe lowering   button faulty. Wire 1479 faulty. Wire 1478 faulty. Rectifier faulty. Wire 1480 faulty. Wire 1435 faulty. Transit valve faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If there are not 22 to 28 vdc present, component supplying voltage to transit valve is faulty. Are 22 to 28 vdc measured at transit valve harness connector, terminal 2 with ENGINE switch ON and middle frame safe lowering button pushed in? WARNING WARNING YES NO Read   WARNING on Page 2-2311 Read   WARNING on Page 2-2311

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