TM 55-2210-224-12
2-13. PREOPERATION AIRBRAKE TESTS (cont)
c.
Train Airbrake Terminal Test.
(1)
With the brake system fully charged and with cutoff pilot valve (1) in the IN position, move automatic brake
valve handle (2) toward SERVICE position, until the equalizing reservoir pressure is reduced 15 psi (103
kPa); then stop and leave the handle in this position.
(2)
Move cutoff pilot valve (1) to the OUT position. Wait 45 to 60 seconds and time the reduction of brake
pipe pressure as indicated by locomotive brake pipe gage (3). Brake pipe leakage should not exceed 5 psi
(34 kPa) drop in 1 minute.
(3)
Optional: During the inspection of the train, automatic brake valve handle (2) may be moved toward FULL
SERVICE position to reduce equalizing reservoir slightly below brake pipe pressure, and cutoff pilot valve
(1) returned to the IN position. This action will prevent excessive loss of brake pipe pressure while
maintaining a service brake application during train inspection.
(4)
Upon completion of the train inspection and after a signal is received to release the brakes, move
automatic brake valve handle (2) to RELEASE position, and if not already there, place cutoff pilot valve (1)
in the IN position to release the train brakes.
IF THE LOCOMOTIVE FAILS TO PASS EITHER OF THE ABOVE TESTS, NOTIFY UNIT MAINTENANCE.
2-14. MOVING LIGHT LOCOMOTIVE
CAUTION
Never operate with handbrake partially
applied. To guarantee release, make
sure that the chain weight and its
snubber are up against the bottom of
the housing. If not, the handbrake must
again be fully set and then released.
a.
Release handbrake (1).
b.
Move reverser (2) to FORWARD or REVERSE,
depending on direction of travel.
c.
Move independent brake valve handle (3) to
RELEASE position.
d.
Determine if the track ahead is clear and open
bell ringer valve (4).
2-32
