99. Q. How locate loose follower bolts?

A. Shut off steam and allow engine to drift; there will be a pound in
the cylinder when the loose follower bolt strikes a forward
cylinder-head as the engine passes the forward center on that side; give
engine steam while still moving and if the pound stops it is likely to
be a loose or broken follower bolt. When working steam, the compression
or pre-admission takes up the lost motion in the rod and connections, so
the loose bolt does not strike the head; when shut off the piston
travels the extra amount of this lost motion and the bolt strikes the
head.

100. Q. When should cross-heads or guides be reported to be lined?

A. When there is excessive lost motion between the cross-head and the
top and bottom guides, or between the cross-head and the guide at the
sides, or when the piston rod is not central between the guides.

101. Q. When should driving box wedges be reported to be lined?

A. When they have been set up as far as possible and the boxes are still
loose between the wedge and shoe. At this time would also report any
excessive flange wear on any one particular tire.

102. Q. When should rod brasses be reported to be reduced? When to be
lined?

A. Rod brasses should be reported reduced when they are larger than the
pins and are pounding and cannot be keyed up properly. They should be
reported to be lined when the key has been drawn or driven to its full