ARMY TM 9-6115-642-24AIR FORCE TO 35C2-3-455-12MARINE CORPS TM 09247A/09246A-24/2TABLE 2-6. UNIT TROUBLESHOOTING - ContinuedMALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONStep 3. Check for contaminated or incorrect grade of fuel.a. If contaminated or incorrect grade, drain fuel tank. Replace fuel filter/water separator element, para-graph 2–87. Service fuel tank with clean fuel of a proper grade (TABLE 2–2). Prime engine fuel sys-tem in accordance with TM 9-2815-253-24.b. If fuel is not contaminated or incorrect grade and trouble persists, notify next higher level of mainte-nance.5 .ENGINEMISFIRING.Step 1. Check for contaminated or incorrect grade of fuel.a. If fuel is not contaminated and correct grade of fuel, do Step 2.b. If contaminated or incorrect grade, drain fuel tank. Replace fuel filter/water separator element, para-graph 2-87. Service generator set tank with clean fuel of a proper grade (TABLE 2-2). Prime enginefuel system in accordance with TM 9-2815-253-24.Step 2. Check for air in fuel lines.a. If air in lines, bleed fuel lines in accordance with TM 9-2815-253-24.b. If no air in fuel lines and trouble persists, notify next higher level of maintenance.6 .ENGINEDOESNOTDEVELOPFULLPOWER.Step 1.Step 2.Step 3.Step 4.Check for restricted fuel filter/water separator.a. If fuel filter/water separator is not restricted, do Step 2.b. If restricted, replace fuel filter/water separator element, paragraph 2-87.Check for contaminated or incorrect grade of fuel.a. If fuel is not contaminated and correct grade, do Step 3.b. If contaminated or incorrect grade, drain fuel tank. Replace fuel filter/water separator element, para-graph 2-87. Service tank with clean fuel of proper grade (TABLE 2–2). Prime engine fuel system inaccordance with TM 9-2815-253-24.Check for blocked air intake system.a. If air intake system is not blocked, do Step 4.b. If blocked, unblock or replace air intake system components as required, paragraph 2-65.Check blocked exhaust pipe or muffler.a. If blocked, unblock or replace muffler, paragraph 2-65.b. If exhaust pipe and muffler are not blocked and trouble persists, notify next higher level of mainte-nance.7. ENGINEKNOCKS.Check for contaminated or incorrect grade of fuel.a. If contaminated or incorrect grade, drain fuel tank. Replace fuel filter/water separator element, para-graph 2-87. Service fuel tank with clean fuel of a proper grade (TABLE 2-2). Prime engine fuel sys-tem in accordance with TM 9-2815-253-24.b. If fuel is not contaminated and correct grade and trouble persists, notify next higher level of mainte-nance.2-17
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