DRUM TURNING (CONT)
Using a brake drum gage, measure inner diameter of drum. If inside diameter of drum is greater than 12.375
inches (31.433 cm), replace drum. If inside diameter is less than 12.375 inches (31.433 cm) and any defects are
found, drum must be turned (machined).
Install drum on brake drum lathe and turn drum as required until a smooth finish can be obtained. If after a series
of attempts a smooth finish cannot be obtained, discard drum.
If a smooth finish is obtained, remeasure inside diameter. If inside diameter exceeds 12.375 inches (31.433 cm),
discard drum and replace.
If a smooth finish is obtained and maximum inside diameter is less than 12.375 inches (31.433 cm), the drum has
This task covers:
General mechanics tool kit, item 16, appx. B
Portable hydraulic ram, 50 ton, item 30, appx. B
Hydraulic power source, item 2, appx. B
Axle removal/installation kit, item 25, appx. B