A. As the receiving valves and final discharge valves are the same size,
the defective valve may be replaced by one of the receiving valves,
blocking the opening made by the removal of the receiving valve.
78. Q. Where piston rod packing is blowing bad, what may be done to stop
it?
A. This generally indicates lack of lubrication, and by cleaning and
oiling the swab the trouble may be overcome. However, there are times
when leakage by the packing is so great that the oil is blown off the
swab as fast as it is applied, therefore is of no value in lubricating
the parts. Where this condition exists, a little hard grease wrapped up
in an old flag and tied around the piston rod will ensure its being
lubricated.
79. Q. If the compressor stops, how can you tell if the governor is
responsible for the trouble?
A. By opening the drain cock in the steam passage between the governor
and the compressor; if steam flows freely, the trouble is in the
compressor; if not, it is in the governor.