A. The packing rings fit into a vibrating cup or cone located inside the
gland, being held therein by means of a spring as well as by the steam
pressure. Provision is made for uneven movement of the rod by making the
inside of the gland larger than the vibrating cup and using a ball-joint
ring between the vibrating cup and gland.

46. Q. While running under steam and there is a failure of part of the
locomotive which does not seem to prevent running at full speed, how
would you proceed?

A. Keep the locomotive running if in your judgment it is safe. Try to
ascertain what the injury is and be prepared at the next stop to do such
work as the case demands, being careful to make the stop at such a place
that the work can be done without interfering with the movements of main
line trains.

47. Q. If one side of a locomotive is disabled, what would you do in a
general way to make it possible to use steam on the other side?

A. Disconnect enough parts to allow for the turning of the wheels and
for reversing of the opposite side without moving the valve on the
disabled side.

48. Q. In case a locomotive in your care became disabled on the road,
what would you do?

A. First see that the train is protected. Next examine the locomotive
and see what is necessary to do to move it and if possible the train. If
unable to make repairs at once to bring the engine and train forward,