A. This may be caused by leaky air piston packing rings; final discharge
valves leaking, or air passages partially stopped up. A defective
governor may also cause the compressor to run slow.
66. Q. What will cause the compressor to run very fast and heat, and not
compress any air?
A. This may be caused by the strainer becoming clogged with ice or dirt,
preventing air entering the cylinder.
67. Q. If, when steam is first turned on, the piston makes a stroke up
and stops, where would you look for the trouble?
A. The shoulder on the reversing rod may be worn; the opening in the
reversing plate too large to engage the shoulder on the reversing rod;
loose reversing plate studs preventing the piston traveling far enough
to reverse the compressor, or the main valve stuck in its position at
the right.
68. Q. If the piston makes a stroke up and a stroke down and stops,
where is the trouble?
A. This may be caused by a loose reversing plate, or the button on the
lower end of the reversing rod worn or broken off, or the nuts off the
piston rod in the air end, or the main valve stuck in its position at
the left.