TM 5-3825-229-14&P
4-27.
SLACK ADJUSTER (cont)
c.
Adjusting Free Stroke (cont).
(a)
Measure distance from bottom of air chamber to center of large clevis pin.
(b)
Another person must apply brakes using 80-90 psi of air pressure.
NOTE
Build tank pressure to 100 psi and shut off engine. Then make and hold full brake
application. This will give 80-90 psi in air chamber.
(c)
Measure distance from air chamber to center of large clevis pin while brakes are applied.
(d)
Difference between measurements is adjusted chamber stroke. Adjusted chamber stroke MUST NOT be
greater than 2 inches.
(e)
If necessary, shorten adjusted chamber stroke. Refer to para. c. (3). Make adjusted chamber stroke as
short as possible, but NOT so short that free stroke is less than distance specified in para. c. (4) (c).
Refer to CAUTION before para. c. (3).
(7)
Install pawl assembly. Tighten screw to torque of 15-20 Ib-ft (20-27 Nm).
(8)
Lubricate slack adjuster through grease fitting until new grease flows from pressure relief valve in screw.
(9)
Repeat para. c. ((1) through (8)) for all slack adjusters.
(10) Uncage spring brake chambers. Refer to para. 3-9.
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