STUFF PUMPS

139

driving belt occasionally, however, may save the machinenian an unexpected
shut.

The pipes leading from the chests to the stuff pump, and thence to the high-
level stuff box, do not, as a rule, get very dirty, but a scrub out once in six

[Bertrams U&.
FIG. 38.—FEE PLUNGER TYTE STUFF PUMP, DIMCT DSIVBN BY ELECTRIC MOTOR
months is necessary to get rid of bits of metal, buttons, chips from the bars of
the beater pktes, etc., which collect in the lower levels*
The Stuff Box.—This should be situated where it can easily be got at for
cleaning purposes, and in such a position that the machinenian can reach it in