Table 2-1. Troubleshooting

TM 5-2420-224-34

Table 2-1. Troubleshooting

Malfunction

Test or Inspection

Corrective Action

ENGINE

1. ENGINE CRANKS BUT WILL NOT START OR HARD TO START.

Step 1.

Remove fuel injector nozzles. Check for blocked fuel injector spray holes by

performing fuel injector spray pattern test (page 13-65).

Repair fuel injector nozzle(s) (page 13-65).

Step 2. Perform compression test as follows:

a. Run engine until it reaches normal operating temperature of 140-185F

(60-85 C). Shut off engine.

b. Remove six fuel injector nozzles (page 3-41).

c. Crank engine several times to remove carbon flakes and dirt.

Clean fuel injector nozzle seat base (1) in cylinder head (2).

Place compression tester adapter (P/N 352 589 00 21 00) into protective

sleeve. Install nozzle holder nut. Tighten nozzle holder nut to 50 Ib-ft

(68 Nm).

Connect compression recorder to compression tester adapter. Crank

engine several times until highest reading is obtained. Record highest

reading. Minimum acceptable compression reading is 284 psi (20 bar).

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