RAM 2500 Van V8-5.9L VIN Z (1997)
Brake Drum: Service and Repair
The brake drums can be machined on a drum lathe when necessary. Initial machining cuts should be limited to 0.12-0.20 mm (0.005-0.008 inch) at a
time as heavier feed rates can produce taper and surface variation. Final finish cuts of 0.025-0.038 mm (0.001-0.0015 inch) are recommended and will
generally provide the best surface finish. Be sure the drum is securely mounted in the lathe before machining operations. A damper strap should always
be used around the drum to reduce vibration and avoid chatter marks. The maximum allowable diameter of the drum braking surface is stamped or cast
into the drum outer edge. Always replace the drum if machining would cause drum diameter to exceed the size limit indicated on the drum.
