TSB 87-13-23 ACCESSORY DRIVE BELTS - 4.9L - JUMPS OFF POWER STEERING PUMP PULLEY - VEHICLES BUILT 09/01/86 THROUGH 03/31/87

LIGHT TRUCK: 1987 E SERIES, F SERIES, BRONCO

ISSUE: An accessory drive belt that jumps off the power steering pump pulley may be caused by a mis-aligned power steering bracket.

ACTION: To correct this, check to see if the accessory drive belt rubs on the back edge of the tensioner pulley. If the belt rubs, shim the power steering bracket with a flat washer and install a new accessory drive belt using the following service procedure.
NOTE: Refer to the accessory drive belt application chart on this page for the correct accessory drive belt service part number.

1. Remove the bolt that attaches the A/C-power steering bracket to the engine cylinder head, Figure 18.
2. Loosen two (2) bolts and two (2) nuts that attach A/C-power steering bracket to the engine block, Figure 18.
3. Install a flat washer (44877-S2) between the bracket and the engine cylinder head, Figure 18.
4. Install the bolt removed in Step 1 and torque to 24-35 ft.lbs. (33-47 N-m).
5. Tighten the bolts and nuts loosened in Step 2. Torque to 38-55 ft.lbs. (52-75 N-m).
6. Install a new accessory drive belt.

CAUTION: Do not release the belt tensioner suddenly during belt installation, because damage may occur.

ACCESSORY DRIVE BELT APPLICATION CHART
Application Service: Part Number
F Series/Bronco with manual transmission, air conditioning, and 100 amp alternator: E7TZ-8620-C
F Series/Bronco without air conditioning and with a 60 amp alternator: E5ZZ-8620-A
F Series/Bronco with manual transmission, air conditioning, and 60 amp alternator: E7TZ-8620-D
F Series/Bronco without air conditioning and with a 100 amp alternator: E7UZ-8620-A
F Series/Bronco with automatic transmission, air conditioning and 60 amp alternator: E2DZ-8620-B
F Series/Bronco with automatic transmission, air conditioning and 100 amp alternator: E7TZ-8620-A

PART NUMBER . . PART NAME . . . . . . . . . . . . . . . CLASS
44877-S2 . . . . . . . Flat Washer - Package of 10 . . . BR
E7TZ-8620-A . . . . Drive Belt . . . . . . . . . . . . . . . . . . B
E2DZ-8620-B . . . . Drive Belt . . . . . . . . . . . . . . . . . . B
E7UZ-8620-A . . . . Drive Belt . . . . . . . . . . . . . . . . . . B
E7TZ-8620-D . . . . Drive Belt . . . . . . . . . . . . . . . . . . B
E5ZZ-8620-A . . . . Drive Belt . . . . . . . . . . . . . . . . . . B
E7TZ-8620-C . . . . Drive Belt . . . . . . . . . . . . . . . . . . B

OTHER APPLICABLE ARTICLES: 87-7-22
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual
OPERATION: SP871323A
TIME: 0.5 Hr.
DLR. CODING: Basic Part No. 2882 - Code: 85

Owner caption November 2025 · Photo 0 of 5000