TM 5-3825-229-14&P
4-27.
SLACK ADJUSTER (cont)
c.
Adjusting Free Stroke (cont).
CAUTION
To avoid damaging slack adjuster teeth, remove
pawl assembly before turning adjusting nut.
(3) Set stroke to its approximate length and set
approximate clearance between linings
and
drum as follows:
(a)
Turn manual adjusting nut on slack
adjuster clockwise until brake linings
touch drum.
(b)
Turn
adjusting
nut
1/2
turn
counterclockwise.
(4)
Measure free stroke as follows:
(a)
Measure distance from bottom of air
chamber to center of large clevis pin
while brake is released ("X").
(b)
Use pry bar to move slack adjuster and
apply brake. While brake is applied,
measure same distance again ("Y").
(c)
Difference between measurements is
free stroke. Free stroke sets clearance
between linings and
CAUTION
DO NOT set free stroke shorter than specified
minimum. If free stroke is too short, linings can drag
and damage brake and wear out shoes.
(5)
To lengthen stroke, turn adjusting nut 1/8
turn clockwise. To shorten stroke, turn
adjusting nut 1/8 turn counter-clockwise.
Check stroke again. Continue to measure
and adjust stroke until it is adjusted
correctly.
(6)
Double check for correct installation of slack
adjuster and correct operation of brake as
follows:
4-61