(1) Listen to air chamber and observe
brake shoe movement while assistant
releases and applies PARKING
BRAKE (TM 9-2320-364-10).
(a) If assistant cannot hear air
chamber operate, or brake shoe
does not move when parking
brake control is pushed and
pulled, perform Step (2) below
and replace air chamber
(b) If air chamber operates
correctly, air chamber is OK.
(2) Release PARKING BRAKE.
(1) Measure gap between brake shoe and
drum (Para 12-3).
(a) If there is no gap, adjust brakes
(b) If there is a gap, perform Steps (2)
through (5) below.
(2) Cage air chamber (Para 12-10).
(3) Remove brake drum and air
chamber (Para 13-3 and 12-10).
(4) Inspect brake shoes and wedges
(a) If brake shoes and/or wedges are
faulty, replace brake shoes and/or
wedges (Para 12-2).
(b) If brake shoes and wedges are
OK, go to Step 6 of this Fault.
(5) Install brake drums and air chamber
(Para 13-3 and 12-10).
Truck must be on level ground and wheels
must be chocked before parking brake is
released. Otherwise, truck may roll and
cause injury to personnel.
Wear safety goggles when performing
leakage tests on valves. Failure to do so
may result in serious eye injury due to
high pressure air.