TM 5-3895-370-14&P
NOTE
·
The free stroke sets the clearance
between the linings and brake
drum.
·
If when checking free stroke as
part of Preventive Maintenance,
the free stroke is not within
specifications,
refer
to
troubleshooting (Para 4-13) to
correct the problem prior to
proceeding.
·
The
difference
between
measurement
B
and
measurement A is the free stroke.
Free stroke must be between 5/8
to 3/4 in. (16-19 mm).
(5)
Using a pry bar, move slack adjuster (3) so that
linings (4) are against drum (5). Measure the
distance from center of anchor pin (6) to back of
brake chamber (1) again (measurement B).
CAUTION
Do not set free stroke shorter than
5/8 in. (16 mm). If free stroke is too
short, brake linings can drag and
damage brakes.
NOTE
Perform Step (6) if free stroke is more
than 3/4 in. (19 mm) or less than 5/8
in. (16 mm).
(6)
While moving slack adjuster (3) with pry bar, turn
adjusting nut (2) 1/8 turn at a time in the required
direction and check the free stroke again.
(7)
Refer to a. Caging/Uncaging Brakes and
uncage
brake
chamber
(1),
then
attach
distributor air lines to tow vehicle (para 2-9).
4-265
