TM 5-6115-593-12TO 35C2-3-463-1Table 4-3. Organizational Troubleshooting-ContinuedMALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION4. ENGINE SHUTS DOWN AND WILL NOT RESTART-continuedStep 4.If OVERSPEED indicator lamp is lit, check for 24V DC across emergency stop relay K21 (part of AC-DCcontrol relay assembly, 18, figure 4-19).If 24V,DC is present, proceed to next step. If voltage is absent, K21 may be defective and mustbe referred to next higher level of maintenance.Step 5.Use a multimeter to check for 24V DC across speed switch SS3 (see figures 4-40 and 4-42).NOTETo check this component refer to FO-3 to determine where these points are electrically accessibleto meter probes.If 24V DC is absent, SS3 or its shutdown relay K31 (part of annunciator control assembly, 76,figure 4-20) may be defective and must be referred to next higher level of maintenance.5. ENGINE RUNS ERRATICALLY OR MISFIRES.Step 1.Refer to paragraph 4-50, and check fuel lines into and out of the fuel injection pump for damage orblockage.If fuel lines are defective, refer to paragraph 4-50 for replacement procedures.If fuel lines are free of obstruction or defect, refer malfunction to next higher level of maintenance.Step 2.Check the air intake system (see figure 4-23), especially air valves (27), air cleaners (29), service indicator(28), hoses (25), and adapters (26). Inspect turbochargers (see paragraph 4-78) and intercoolers (seeparagraph 4-84).Clear any blockages, or service air intake system components as necessary (see paragraphs 4-42,4-43, and 4-44). Clear obstructions in turbochargers or intercoolers, or replace if defective (seeparagraphs 4-78 and 4-84).If air intake system appears to be working properly, refer to next higher level of maintenance.Step 3.If feasible, temporarily disconnect the generator load by4-26
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