2-9. STATIONARY LOCOMOTIVE AIRBRAKE TEST (cont)
Observe gages. Gages shall indicate the following:
Main reservoir pressure 120 to 130 psi (827 to 896 kPa).
Equalizing reservoir and brake pipe pressures 80 or 90 psi (552 or 621 kPa).
Brake cylinder pressure 0 psi (0 kPa).
Use the automatic brake valve and make a 10-psi (69 kPa) brake pipe reduction.
After brake pipe exhaust ceases to blow, move cutoff pilot valve to OUT position and perform the following:
Make a visual inspection of each brake cylinder and check that brakes are applied.
Observe brake pipe and brake cylinder gage for 1 minute. Brake pipe pressure leakage must not exceed
5 psi (34 kPa) in 1 minute. Brake cylinder pressure should indicate between 10 and 25 psi (69 and 172
Observe equalizing reservoir and main reservoir gage for 1 minute. No drop in equalizing reservoir
pressure is allowed.
Press independent brake valve handle down for 7 seconds. Check that brakes release.
Move cutoff pilot valve to IN position and make a 15-psi (103 kPa) brake pipe reduction. Check that
brakes apply and brake cylinder pressure indicates between 10 to 25 psi (69 to 172 kPa).
Move automatic brake valve handle halfway toward RELEASE position. Observe main reservoir and
equalizing gage. Check that there is no rise in equalizing reservoir pressure. Any rise in pressure shall
require repair of automatic brake valve, distributing valve, and/or associated piping up to the angle cock.
Move power throttle to No. 2 position and move automatic brake valve to EMERGENCY position.
Observe the following:
Brake pipe pressure reduces rapidly to zero.
Equalizer reservoir pressure falls to zero in 3 to 5 seconds.
Brake cylinder pressure builds up at a rapid rate to no more than 68 to 72 psi (469 to 496 kPa).
Sanders are actuated.
Move throttle to IDLE.