TM 10-4320-344-24SECTION IV. TROUBLESHOOTING2.10 TROUBLESHOOTING.2.10.1 General:The malfunction index lists malfunctions that may be observed byunit level maintenance.The malfunctions are then cross-referenced to thetroubleshooting table 2-4.Table 2-4 contains information useful in diagnosing andcorrecting unsatisfactory operation of the pumping assembly which may be encounteredduring operation or maintenance of the pumping assembly or its components.Use themalfunction index to locate specific troubleshooting procedures contained intable 2-4.After locating the listed malfunction, perform the test/inspections andcorrective actions in the order listed in table 2-4.The malfunction index andTable 2-4 cannot list all the malfunctions that may occur, all the test andinspections needed to find the fault, or all the corrective actions needed toc o r r e c t t h e f a u l t .If the equipment malfunction is not listed or actions listed donot correct the fault, notify your supervisor.2.10.2 References.When paragraphs are referenced in table 2-4 (for example,paragraph 2.10/2.15/2.27), the paragraph number at the left of the slash, /, refersto Pumping Assembly 609-A, the number between the slashes refers to Pumping Assembly609-C, and the number to the right of the slash refers to Pumping AssemblyUS636HCCD-1.MALFUNCTION INDEXMalfunction Numberin Table 2-4Engine will not crank. . . . . . . . . . . . . . . . . . . . . . . . . . 1Engine cranks, but will not start. . . . . . . . . . . . . . . . . . . . 2Engine stops suddenly. . . . . . . . . . . . . . . . . . . . . . . . . . 3Engine oil pressure too low . . . . . . . . . . . . . . . . . . . . . . . 4Ammeter reading too low . . . . . . . . . . . . . . . . . . . . . . . . . 5Engine smokes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Engine knocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Engine overheats (Model 609-A)Engine overheats (Models 609-C and US636HCCD-1) . . . . . . . . . . . . . 9Table 2-4.Unit Troubleshooting Table.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION1. ENGINE HILL NOT CRANK.Step 1.Check for loose or corroded terminals on battery, starter, start alarmrelay (Model 609-A), and start pilot relay (Model 609-C) and broken orfrayed battery cables.Clean and tighten terminals.Step 2.Check for broken or frayed wires between voltage regulator andalternator (Models 609-A and US636HCCD-1) and generator capacitor andalternator (Model 609-C).a .Repair wires as necessary.b .Replace generator capacitor (paragraph 2.21.15) (Model 609-C).2-29. . . . . . . . . . . . . . . . . . . . . . 8
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