TM 10-4320-226-144.8UseSECTION IV. UNIT TROUBLESHOOTINGUNITTROUBLESHOOTING.the malfunction index to locate specific troubleshooting procedures containedin table 4-2.After locating the listed malfunction, perform the test/inspectionsand corrective actions in the order listed in table 4-2.The malfunction index andTable 4-2 cannot list all the malfunctions that may occur, all the test andinspections needed to find the fault, or all the corrective actions needed tocorrect the fault.If the equipment malfunction is not listed or actions listed donot correct the fault, notify your supervisor.MALFUNCTION INDEXMalfunction Numberin Table 4-2Engine will not crank . . . . . . . . . . . . . . . . . . . . . . . . . . 1Engine will not start . . . . . . . . . . . . . . . . . . . . . . . . . . 2Engine speed does not adjust . . . . . . . . . . . . . . . . . . . . . . 3Engine starts or runs erratic after warmup . . . . . . . . . . . . . . . 4Oil pressure reading low . . . . . . . . . . . . . . . . . . . . . . . .5Ammeter reading too low . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 4-2.Unit Troubleshooting Table.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION1.ENGINE WILL NOT CRANK.Step 1.Check for loose or corroded terminals on battery and starter.Step 2 Testa.b.Clean and tighten terminals (paragraph 4.12.2).battery (paragraph 4.12.1).Recharge battery if low.Refer to paragraph 4.12.2 and replace battery.Step 3.Pull out emergency stop switch.Panel light should illuminate.If panel light does not illuminate, go to step 7.Step 4.Press oil pressure bypass switch and listen for audible click.a. If no click is heard, go to step 5.b. If click is heard, go to step 6.Step 5.Test Blower V-belt Contact Switch (paragraph 4.10.9).Replace v-belt contact switch (paragraph 4.10.10).4-7
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