Park Brake Cable - Tension Readjustment
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Number:
91-484-5
Section:
5
Date:
FEB. 1992
Corporate Bulletin No.:
165011
ASE No.:
A5
Subject:
PARK BRAKE CABLE TENSION READJUSTMENT
Model and Year:
1988-91 C TRUCKS LESS THAN 15,000 LB. GVW
Owners of some 1988-1991 C Trucks with less than 15,000 lb. GVW may comment that they frequently have to adjust the park brake cable tension or that the cable is out of adjustmeht capability after a few adjustments This condition may be caused by the frame bracket (left front cab mounting bracket) flexing and allowing the park brake cable tension to vary.
To correct this condition, a park brake cable stretch bracket (P/N 15659766) has been designed.
Service Procedure:
1. Raise Vehicle - Locate the frame bracket (left front cab mounting bracket) where the park brake cable is routed through the rear flange of the bracket. Clean the rearward face of the flange around the cable and adjacent frame area if necessary (Figure 1).
2. Position the park brake cable stretch bracket against both the rear flange of the frame bracket at mount) and the frame so that the notch cut in the stretch bracket partially encircles the park brake cable where it passes through the rear flange of the frame bracket.
3. Secure the bracket with a pair of locking pliers. Center punch all four holes. Two on the rear flange on the frame bracket and two on the frame.
4. Remove the locking pliers and the park brake cable stretch bracket. Drill four 3/16 in. (4.76 mm) pilot holes at the previously, center punched locations.
5. Then drill the pilot holes out to 23/64 in. (9.00 mm).
6. Bolt the bracket into position using four 5/16 in. x 3/4 in. (8 mm x 19 mm) bolts, nuts, and washers (Figure 1).
7. Torque the bolts to 6 - 8 ft.lbs. (8 - 12 N-m).
SERVICE PARTS INFORMATION
Part Number Description
15659766 Park Brake Cable Stretch Bracket
Parts are currently available from GMSPO.
WARRANTY INFORMATION
For vehicles repaired under warranty use:
Labor Operation:
H2800
Use applicable labor time guide for labor hours.