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Table 4-1.  Unit PMCS - Continued
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TM-5-4210-220-12 Truck Firefighting: Powered Pumper: Foam and Water 500-GPM Capacity; Centrifugal Pump Power Takeoff Driven Manual
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SYMPTOM INDEX - Continued - TM-5-4210-220-12_162
TM 5-4210-220-12 Section IV.  UNIT TROUBLESHOOTING PROCEDURES 4-6.  GENERAL. Troubleshooting at the Unit Maintenance level requires you to locate any trouble as quickly as possible.  Once the trouble is located, repair or replace the part if you are authorized to do so or determine if a higher category of maintenance is required. 4-7 PROCEDURES. Repair by Unit Maintenance are limited by tools, test equipment, and replacement parts allocated to that level.  Before using the troubleshooting table, check your work order and talk to the operator, if possible, for a description of symptoms if trouble occurred while equipment was in operation. 4-8.  SYMPTOM INDEX. Refer to table 4-2, TROUBLESHOOTING, under the number against the symptom in this index to determine the tests and corrective action required. CAB DOOR WON'T OPEN  .................................................................................................................. 1a HEATER LEAK  ............................................................................................................................ 1b NO HEAT ..................................................................................................................................... 1c NO DEFROST  ............................................................................................................................. 1d FAN INOPERATIVE ..................................................................................................................... 1e WASHER INOPERATIVE ............................................................................................................. 1f WIPER WON'T RUN .................................................................................................................... 1g WIPER WON'T CLEAR WINDSHIELD  ........................................................................................ 1h WINDOWS INOPERATIVE .......................................................................................................... 1j PUMP BODY GRATING WON'T LATCH  ........................................................................................................... 2a HOSE ROLLER WON'T ROLL ..................................................................................................... 2b VALVE HANDLE INOPERATIVE  ................................................................................................. 2c VALVE HANDLE WON'T LOCK  ................................................................................................... 2d LEVEL GAGE NOT FUNCTIONING ............................................................................................. 2e DISCHARGE GAGE INOPERATIVE ............................................................................................ 2f PUMP GAGE INOPERATIVE   ...................................................................................................... 2g ENGINE GAGE INOPERATIVE  ................................................................................................... 2h AUXILIARY POWER UNIT WON'T CRANK ............................................................................................................................ 3a WON'T START  ............................................................................................................................ 3b CRANK SLOWLY  ........................................................................................................................ 3c STOPS  ........................................................................................................................................ 3d ERRATIC OPERATION  ............................................................................................................... 3e LOW POWER .............................................................................................................................. 3f 4-17

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