TM 9-2320-272-24-1
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
71. AIR PRESSURE GAUGE INOPERATlVE
Replace air gauge with one known to be good (para. 3-87).
If test gauge works properly, replace defective air gauge (para. 3-87).
END OF TESTING!
72. OIL PRESSURE GAUGE INOPERATIVE (OIL LEVEL IS CORRECT)
Check oil pressure sending unit for proper operation.
a. Replace oil pressure sending unit with one known to be good (para. 3-86).
b. If oil pressure gauge does not work properly, replace oil pressure gauge (para. 3-86).
END OF TESTING!
RADIO INTERFERENCE SUPPRESSION
73. INTERFERENCE WHILE VEHICLE IN MOTlON
Inspect wiring for loose connections and frayed or broken wiring.
a. Tighten all loose connections,
b. Replace or repair frayed or broken wiring (para. 3-131).
END OF TESTING!
74. INTERFERENCE ONLY WHEN ENGINE IS RUNNING
Inspect alternator for defects.
If defective, replace alternator (para. 3-79 or 3-80).
END OF TESTING!
FIFTH WHEEL
75. TRAllER WILL NOT HITCH TO FIFTH WHEEL
Inspect coupling jaws for bends and breaks.
If coupling jaws are bent or broken, replace fifth wheel (para. 3-248).
END OF TESTING!
MEDIUM WRECKER (M936)
76. HYDRAULIC SYSTEM DOES NOT OPERATE
Step 1. Check hydraulic oil reservoir for proper fluid level (LO 9-2320-272-12).
Fill oil reservoir to proper fluid level if necessary (LO 9-2320-272-12).
Step 2. Check if PTO is engaged.
a. Engage PTO control (TM 9-2320-272-10).
b. If PTO does not engage, perform malfunction 67,
Step 3. Check all hydraulic lines for damage and leaks.
a. Tighten loose fittings.
b. If hoses are leaking or damaged, notify DS maintenance.
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