Eagle L4-150 2.5L (1983)
Wheel Hub: All Technical Service Bulletins
Brakes - Shudder on Light Application
11E062
OCTOBER 1983
1980-83 EAGLE 30-50 SERIES
BRAKES
Attention: Workshop, Parts Department.
BRAKE SHUDDER
Information
Some 1980-83 Eagles may develop a shudder-like brake vibration that occurs during light brake pedal applications but does not occur when additional
pressure is applied to the brake pedal.
Service correction involves verifying and eliminating the brake shudder as outlined in the following procedures.
ROAD TEST AND VERIFICATION
NOTE:
The following road test verifies a brake vibration or shudder Refer to the appropriate AMC Technical Service Manual for diagnosis of any
other vibrations noted during the road test
1.
Drive the vehicle at 50-55 mph, apply light pressure to the service brakes and note vehicle reaction. Repeat this operation at least two more times.
a)
If no vibration occurs, return the vehicle to the owner.
b)
If vibration or shudder is evident during brake application, proceed to step 2.
2.
Determine if the problem is related to the front or rear wheels as follows:
^
Block or tie the parking brake release mechanism in the fully released position. Then drive the vehicle at 50-55 mph, lightly apply pressure to
the parking brake and note vehicle reaction.
CAUTION: Excessive parking brake application can cause rear wheel lockup.
a)
If vibration or shudder is evident, proceed to Rear Brake Service Procedure.
b)
If no vibration or shudder is evident but vibration was noted during brake application in step 1, proceed to Front Brake Service Procedure.
FIGURE 1 - ROTOR MOUNTING FLANGE
FRONT BRAKE SERVICE PROCEDURE
Inspect both front wheel hubs at the rotor mounting flange surface (inboard of the five mounting holes) for a machined step about halfway around the
flange (Fig. 1). If the step is present, replace the original hub and bearing assemblies with replacement assembly, 3238527. Refer to the hub and bearing
removal and installation procedures on pages 2F-22 and 2F-23 in the 1982 AMC Technical Service Manual.
REAR BRAKE SERVICE PROCEDURE
1.
Remove the rear wheels, brake drums and axle hubs. Inspect the brakeshoes, springs, wheel cylinders and backing plates. Replace worn
