96. Q. How can it be known when the wedges are set up too tight and the
driving box sticks, and in what manner can they be pulled down?

A. If wedges are set up too tight, it causes the boxes to stick and the
engine to ride rough. Inspection of the engine when moving will locate
the disabled box; usually this gets hot at once and the wedges should be
immediately pulled down. Loosen the jam nuts on the wedge bolts and back
them down; if the wedge is stuck very tight it may be necessary to run
one or more of the wheels over a block; or to loosen the pedestal, brace
bolt and allow the jaws to spread to release the box.

97. Q. What are some of the various causes for pounds?

A. Wedges not properly adjusted, loose or worn driving box brasses, rod
brasses not keyed or in need of reducing, loose side rod bushings or
side rod connections, worn cross-heads, wrist pins, broken frame, loose
cylinder key, loose piston on rod, or rod loose in cross-head, loose
follower bolts or obstruction in the cylinder.

98. Q. How may a pound in driving boxes, wedges or rod brasses be
located, and after locating what should be done?

A. Place the engine at half stroke on side to be tested. Do not set
brake when testing for loose wedges or defective boxes; set brake when
testing for other pounds. Reverse engine from forward to back gear under
steam, noting the movement of the axle in the boxes, the driving boxes
between the wedges, rod brasses on the pins and movement of cross-head
between the guides. If possible would adjust wedges or rod brasses at
once and report repairs needed at the terminal.