Excessive Engine Vibration

TM 5-2410-233-23

TROUBLESHOOTING PROCEDURES - CONTINUED

0006 00

Table 1. Engine Troubleshooting Procedures - Continued.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

2. Check for loose or damaged 1. Tighten vibration damper

Excessive Engine Vibration - Continued.

vibration damper (WP 0027

capscrews to 75 lb-ft (102

00).

Nm).

2. Replace damaged vibration

damper (WP 0027 00).

3. Check for loose or damaged 1. Tighten pulley capscrews to

crankshaft pulley. (WP 0026

230 lb-ft (312 Nm).

00).

2. Replace damaged crankshaft

pulley (WP 0026 00).

4. Check fan blade balance.

a. Loosen or remove V-belts

(WP 0069 00).

b. Operate engine at RPM 1. If vibration is not noticeable,

where vibration occurred.

replace fan drive assembly

(WP 0067 00).

2. If vibration is noticeable, go to

step 5.

5. Inspect for loose or damaged 1. If engine mounts are loose

engine mounts.

because of wear or damage,

replace mounts(s) (WP 0020

00 and WP 0021 00).

2. If engine mounts are loose,

tighten (WP 0020 00 and WP

0021 00).

1. Check with operator to 1. If incorrect fuel was used,

10. Engine Knocks (Fuel Knock).

determine if fuel tank was

perform the following:

filled with correct fuel.

a. Drain fuel system.

b. Replace fuel filters (WP

0055 00 and WP 0056 00).

c. Fill fuel tank with correct

fuel (TM 5-2410-233-10).

d. Prime fuel system (WP

0038 00).

2. Check fuel injection lines for Bleed air from fuel injection lines

air.

(WP 0038 00).

0006 00-7