Dakota 2WD V8-4.7L (2008)
Brake Drum: Testing and Inspection
DIAGNOSIS AND TESTING - BRAKE DRUM
The maximum allowable diameter of the drum braking surface is indicated on the drum outer edge. Generally, a drum can be machined to a maximum of
1.52 mm (0.060 in.) oversize. Always replace the drum if machining would cause drum diameter to exceed the size limit indicated on the drum.
BRAKE DRUM RUNOUT
Measure drum diameter and runout with an accurate gauge. The most accurate method of measurement involves mounting the drum in a brake lathe and
checking variation and runout with a dial indicator.
Variations in drum diameter should not exceed 0.03 mm (0.0012 in.). Drum runout should not exceed 0.06 mm (0.0024 in.) out of round. Machine the
drum if runout or variation exceed these values. Replace the drum if machining causes the drum to exceed the maximum allowable diameter.
