a. Disk Brakes.
This task covers inspection of disk brakes. Inspect disk
brakes after every 250 hours of operation or every month , whichever occurs first.
TOOLS: Automotive Mechanics Tool Kit
M a c h i n i s t s s t e e l r u le
Outside micrometer, one inch capacity
Linings and disks can be
c h e c k e d w i t h c a l i p e r i n-
stalled on machine.
(a) At each wheel end, measure thickness of lining on each brake pad using
m a c h i n i s t ' s s t e e l r u l e.
(b) Thickness of each lining must be more than 2.54 millimeters. If lining
thickness is not 2.54 millimeters replace linings (page 7-19).
(c) Thickness of lining in each caliper must be approximately equal. If lin-
ing thickness is not equal, caliper is leaking at one side and must be
replaced (page 7-28).
(d) Measure thickness of each disk.
Each disk. must be at least 12.70 millimeters thick. If disk is not at
least 12.70 millimeters thick,
notify direct support maintenance (disk
must be replaced).
(f) Check disks for deep grooves and warpage. If disk has deep grooves or
warpage, notify direct support maintenance (disk must be replaced).