TM 10-3930-671-24 Table 2-2. Unit Troubleshooting Procedures MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION ENGINE 1. ENGINE WILL NOT START. Step 1. Check that engine is cranking. If engine will not crank, go to step 2. If engine will crank, go to step 3. Step 2. Check if engine will turn over manually. If engine will turn over manually, go to ELECTRICAL SYSTEM 34. ENGINE WILL NOT CRANK. If engine will not turn over manually, notify DS/GS maintenance. Step 3. Test fuel shutoff solenoid with key switch in RUN position. If test result is not 5-11 volts, fuel injection pump faulty. Notify DS/GS maintenance. If test result is 5-11 volts, go to step 4. Step 4. Check if fuel lines and fittings are loose. If fuel lines and/or fittings are loose, tighten or replace; then, bleed fuel system (Appendix F, Fuel System, Section 5.0), and prime fuel system (Appendix F, Diesel Fuel Injection System, Section 5.3). If fuel lines and fittings are secure, go to step 5. Step 5. Test fuel supply pressure at engine idle (650-700 rpm). Disconnect fuel supply line at inlet side of fuel filter. Test fuel pressure. If test results are not 1.50 to 2.25 psi, replace fuel supply pump (Para 3-17). If test results are 1.50 to 2.25 psi, go to step 6. Step 6. Test fuel filter pressure drop at engine idle (650-700 rpm). Disconnect fuel supply line at outlet side of fuel filter. Test fuel pressure. If test results are not 1.50 to 2.25 psi, replace fuel filter (Para 3-16). If test results are 1.50 to 2.25 psi, notify DS/GS maintenance. 2-3