ENGINE HARD TO START (cont) - TM-10-3930-638-24-P0515

TM 10-3930-638-24&P

3-4. FUEL SYSTEM TROUBLESHOOTING (cont)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

3. ENGINE HARD TO START (cont)

Step 15. Check adjustment of torque screw (para 4-3b; notify general support maintenance).

a. If torque screw out of adjustment, adjust (para 4-3b).

b. If torque screw adjustment is okay, proceed to step 16.

Step 16. Disassemble automatic advance components and inspect (para 4-3b; notify general support

maintenance).

a. If automatic advance components are worn or damaged, replace and adjust (para 4-3b).

b. If automatic advance components are okay, proceed to step 17.

Step 17. Check delivery valve screw for tightness (para 4-3b; notify general support maintenance).

a. If delivery valve screw is loose, tighten (para 4-3b).

b. If delivery valve screw is tight, remove it. Then, remove delivery valve and inspect seat for

1) If seat is eroded, replace delivery valve (para 4-3b).

2) If seat is okay, reinstall, tighten delivery valve screw (para 4-3b) and proceed to step 18.

Step 18. Check rotor for scores (para 4-3b; notify general support maintenance).

Replace rotor (para 4-3b).

4. ENGINE STARTS AND STOPS

Step 1. Check fuel injection pump timing (para 3-5a(3)).

a. If fuel injection pump timing is not correct, adjust timing as described in paragraph 3-5a(3).

b. If fuel injection pump timing is okay, proceed to step 2.

Step 2. Disconnect fuel lines from fuel injection pump at fuel injectors (para 3-6a) one at a time, crank engine

and check that fuel is pumped out of disconnected line.

a. If fuel is not pumped out of any one disconnected fuel line when engine is cranked, replace

associated connector screw (para 4-3b; notify general support maintenance). If fuel is not

pumped out of any and all lines when disconnected, replace/clean inlet strainer (para 4-3b; notify

general support maintenance).

b. If fuel is cranked out of all lines when disconnected, proceed to step 3.

Step 3. Remove governor control cover (para 4-3b; notify general support maintenance) and check solenoid

frame and arm assembly for cracks and swelling in encapsulated material and looseness of screw

terminals. Check continuity using an ohmmeter (para 4-3b; notify general support maintenance).

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