Toyota
Dodge Durango
 Service Manual
Brakes » Base brake system » 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 0.069 mm (0.0028 in.). Drum runout should not exceed 0.18 mm (0.007 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.

    More about «Diagnosis and testing»:

    Base brake system

    Brake lamp switch

    Red brake warning lamp

    Master cylinder/power booster

    Combination valve

    Disc brake rotor

    Brake drum

    Brake line and hoses

    Brake fluid contamination

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