ENGINE SMOKES BLUE OR WHITE

TM 10-3930-638-24&P

3-4. FUEL SYSTEM TROUBLESHOOTING (cont)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

8. ENGINE SMOKES BLACK (cont)

Step 3. (cont)

a. If cam, shoes, or rollers are worn, replace (para 4-3b).

b. If cam, shoes, and rollers are okay, adjust torque screw (para 4-3b).

9. ENGINE SMOKES BLUE OR WHITE

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. 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 3.

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

Replace rotor (para 4-3b).

10. FUEL NOT REACHING FUEL INJECTION PUMP

Step 1. Disassemble fuel injection pump and check for cause of seizure of rotor assembly (para 4-3b; notify

general support maintenance).

a. Replace hydraulic head and rotor assembly (para 4-3b).

a. If hydraulic head and rotor assembly are okay, proceed to step 2.

Step 2. Remove inlet strainer and check for clogged condition (para 4-3b; notify general support maintenance).

a. If inlet strainer is clogged, either clean or replace strainer (para 4-3b).

b. If strainer is not clogged, proceed to step 3.

Step 3. Disassemble transfer pump and check that transfer pump liner locating pin is in correct hole (para 4-3b;

notify general support maintenance).

a. If locating pin is in wrong hole, remove and install in correct hole (para 4-3b).

b. If locating pin is in correct hole, proceed to step 4.

Step 4. Disassemble fuel injection pump and check transfer pump parts for wear or damage (para 4-3b; notify

general support maintenance).

a. If transfer pump parts are worn or damaged, replace (para 4-3b).

b. If transfer pump parts check okay, replace end plate regulating piston and sleeve (para 4-3b).