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TM 10-3930-653-14&P
INSPECTION
Inspect all parts for defects and repair or replace if unsatisfactory.
(1)
Check the inner surface of the wheel cylinder
and the outer circumference of the piston for
rust. Then measure the clearance between the
piston and cylinder.
Standard:
0.065-0.15 mm
(0.0026-0.0059 in)
Limit:
0.15 mm (0.0059 in)
Fig. 4-455.
(2)
Visually check the piston cup for damage or deformation. If unsatisfactory, replace.
Cup interference standard:
1.49 mm (cup o.d. of 30.1 mm)
[0.059 in (cup o.d. of 1.19 in)]
Cup interference limit:
0.65 mm (cup o.d. of more than 29.0 mm)
[0.026 in (cup o.d. of more than 1.14 in)]
(3)
Check the free length of the wheel cylinder spring. If unsatisfactory, replace.
Specified free length:
28.58 mm (2.28 in)
(4)
Check the thickness of brake lining.
If excessive wear is noticed, replace.
Specified thickness:
8.0 mm
(0.32 in)
Thickness limit:
1.0 mm
(0.039 in)
(5)
Visually check the condition of the brake drum
inner surface. If any damage or excessive wear
is noticed, repair by machining or replace.
Standard:
314 mm (12.36 in)
Repair limit:
316 mm (12.44 in)
Fig. 4-456.
Fig. 4-457.
4-230
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