TM 10-4320-307-24Chapter 3DIRECT SUPPORT MAINTENANCE INSTRUCTIONSINTRODUCTIONThis chapter contains the following frequently used maintenance information:a.Troubleshootingb.Maintenance proceduresThe symptom index on page 3-1 is a guide to the troubleshooting information. There is also an index to the maintenanceprocedures on page 3-4.SectionTitlePageSection ITroubleshooting .....................................................................................................................3-1Section IIMaintenance Procedures .................................................................. ....................................3-4Section I. TROUBLESHOOTING3-1TROUBLESHOOTING.a.Table 3-1 contains troubleshooting information for locating and correcting most of the operating troubles whichare the responsibility of direct support maintenance. Each malfunction for an individual component, unit, or sys-tem is followed by a list of tests or inspections which will help you to determine probable causes and correctiveactions to take. Perform the tests/inspections and corrective actions in the order listed. b.This manual cannot list all malfunctions that may occur, nor all tests or inspections or corrective actions. If amalfunction is not listed or cannot be corrected by listed corrective actions, notify your supervisor.c.Only those functions within the scope of direct support maintenance arelisted. For troubleshooting procedureswithin the scope of operator/crew maintenance, refer to TM 10-4320-307-10. For troubleshooting procedureswithin the scope of unit maintenance, refer to Table 2-2.3-2SYMPTOMINDEX. Refer to the symptom index below. Locate the malfunction which is the same, or mostnearly the same, as the trouble you are having with the pumping assembly. The Symptom Index lists the first page oftrouble- shooting information for that malfunction. Follow the steps one by one, and perform the corrective actions listed.MalfunctionDescriptionPageNumber1Engine fails to crank or cranks at low speed3-22Engine starts but runs unevenly, stalls, or surges3-23Engine stops running or produces black, white, or grey smoke3-24Engine consumes excessive lube oil3-35Engine oil pressure is low3-36Pump does not discharge or has low discharge pressure3-37Pump makes excessive noise3-33-1
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