TM 55-203
Figure 8-12. Combined auxiliary and emergency reservoir.
(d) Blowing nozzle valve with suitable 1/4-
inch pipe nipple nozzle for blower hose.
(4) Blow any dirt or water out of the yard air line
and supply hose connection to car. If the brake tests
(e) Shipping covers and vent protector plug
are to be made by the men who clean the brake, couple
as per brake manufacturer's standard for protecting AB
the single car tester to the yard air line and the car brake
valve portions in transit.
pipe at the B-end of the car. Otherwise, couple the yard
air supply directly to the car brake pipe. Charge the
(f) Suitable covers or containers to protect
brake pipe, and leave the yard air supply connected to
the AB brake cylinder piston, hollow rod and
it. Blow out the brake pipe by opening the angle cock at
nonpressure head assemblies from dirt or damage
the A end of car, and then apply a dummy coupling or
should be provided when transporting assemblies to and
the blower hose to the A end of the car and leave both
from the car.
angle cocks open. Open the branch pipe cock to blow
dirt from the branch pipe, then close it.
(g) A grease can arranged so that both the
grease and brush can be protected against dirt.
(5) Scrape, wipe, and blow off all dirt adjacent
to the gaskets between -the pipe bracket and the valve
(2) Record the car number, owner, and last
portions, then using the blower hose, blow off all loose
cleaning date. All old cleaning marks must be scraped
dirt on the AB valve portions, pipe bracket, hopper
off and painted over with quick-drying black paint.
slopes, car underframes, etc., that may otherwise get
into the AB valve portions or pipe bracket when the
(3) Close the branch pipe cock and drain the air
portions are being removed and clean portions applied.
out of the auxiliary reservoir, emergency reservoir, and
brake cylinder. Remove the cup from the dirt collector
Note. The operating portions of the AB control
and leave it off until cleaned valve portions are applied.
valve or parts thereof must never be dismantled or have
Disconnect the release valve lever, leaving it attached
any parts removed or replaced on the car. All cleaning
to the release rods.
and relubrication of the valve portions must be
accomplished by competent airbrake mechanics in a
well- lighted location.
8-16
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