TM 55-2210-224-12
2-13. PREOPERATION AIRBRAKE TESTS
BEFORE MOVING YOUR LOCOMOTIVE, PERFORM THE FOLLOWING TESTS.
a.
Locomotive Brake Pipe Leakage Test.
(1)
With the brake system fully charged and
with cutoff pilot valve (1) in the IN position,
use automatic brake valve handle (2) to
make a 15-psi (103 kPa) brake pipe
reduction. After the exhaust of brake pipe
pressure ceases, move the cutoff pilot
valve to the OUT position. Time the
reduction
of
brake
pipe
pressure
as
indicated by locomotive brake pipe gage
(3). The brake pipe leakage should not
exceed 5 psi (34 kPa) drop in a 1-minute
time period.
(2)
At the completion of the test, move cutoff
pilot valve (1) to the IN position and
automatic brake valve handle (2) to the
RELEASE position to recharge the brake
system. Inspect the brake cylinder to check
that brakes have released.
(3)
Move independent brake valve handle
(4)
to FULL APPLICATION. Inspect the brake
cylinders to check that brakes have applied.
Move
independent
brake
handle
to
RELEASE position. Inspect brake cylinders
to check that brakes have released.
b.
Emergency Test.
(1)
Set emergency brake valve (5) on fireman's side
of cab to OPEN.
(2)
Move automatic brake valve handle (2) to
EMERGENCY. Set emergency brake
valve (5) on fireman's side of cab to
CLOSE.
(3)
Inspect the brake cylinder to check that
brakes have applied.
(4)
Move automatic brake valve handle (2) to
RELEASE.
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