Accessory Drive Belt - Premature Tensioner Wear

Article No.
98-23-14

11/23/98

FEAD - BELT TENSIONER WEAR - VEHICLES WITH
7.3L DI TURBO ENGINE

LIGHT TRUCK:
1995-97 F SUPER DUTY
1995-98 ECONOLINE, F-250 HD, F-350

ISSUE
Premature wear of the belt tensioner may occur on some vehicles. This may be due to engine torsional input to the Front Engine Accessory Drive (FEAD) system causing excessive tensioner arm movement.

ACTION
Replace single arm tensioner with new dual arm tensioner. Refer to the following Service Procedure for details.

SERVICE PROCEDURE
Refer to the appropriate Service/Workshop Manual for procedure details for the following:

1. Remove drive belt, alternator, belt tensioner, grooved idler pulley, flat idler pulley, and alternator mounting bracket.

2. Modify the alternator mounting bracket as follows:





a. Cut off the support boss for the grooved idler pulley. The boss must be cut off flush with the side of the bracket support ribs (Figure 1).





b. Cut the boss support rib down 12 mm (0.5") from the boss to support rib of the bracket (Figure 2).





c. Modified bracket should appear as in Figure 3.

3. Mount the dual arm tensioner onto the alternator mounting bracket and verify that it lies flat on the mounting surface of the bracket.

4. Reinstall bracket/tensioner assembly, flat idler pulley, and alternator. Install new drive belt The grooved idler is no longer required, discard this part. Remove old belt routing decal and install new belt routing decal.





Parts Block

OTHER APPLICABLE ARTICLES: NONE

WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Powerstroke Diesel Engine Warranty Coverage

OPERATION DESCRIPTION TIME

982314A Replace Tensioner 1.0 Hr.
(F-Series)

982314B Replace Tensioner 1.1 Hr.
(Econoline)

DEALER CODING
CONDITION
BASIC PART NO. CODE
6B209 30

OASIS CODES: 497000, 499000