A. The holding feature of the brake will be lost; that is, the brake
will release when the automatic brake valve is returned to release or
holding position.
185. Q. If the brake cylinder pipe breaks, can the locomotive brake be
applied with the automatic brake valve? With the independent brake
valve?
A. This depends on where the pipe breaks; if between the cut-out cock
and any one of the brake cylinders, close the cut-out cock to that
cylinder, and the other cylinders may be used. But if the pipe breaks
between the control valve and the double-throw check valve, the
automatic brake is lost; if the break be between the independent brake
valve and double-throw check valve, the independent brake is lost.
186. Q. If the brake cylinder pipe breaks and is not plugged, what must
be done?
A. Close the cut-out cock in the main reservoir supply pipe, this to
avoid the waste of air when a brake application is made on the train.
187. Q. If the brake pipe connection to the control valve breaks, what
should be done?
A. Plug the end leading from the brake pipe; the automatic brake cannot
be applied on the locomotive, but the independent brake will not be
affected.
188. Q. If the control cylinder pipe breaks, what effect will it have
and what must be done?
A. The locomotive brake cannot be applied with the automatic brake
valve; by plugging the pipe, this feature of the brake will be restored,
but the independent release feature will be lost.
189. Q. If any of the pipes here enumerated breaks, will it in any way
affect an application of the independent brake?
A. No; as the independent and automatic features are entirely separate
from each other; that is, the automatic control valve is not brought
into use when an independent application of the brake is made.