A. This may be caused by a broken or stuck open air valve, or air valves
not having proper lift. Where the piston short strokes, it is generally
caused by over-lubrication of the steam end.
64. Q. What are some of the common causes for the compressor running
hot?
A. The overheating of the compressor may be due to any one of the
following causes: Running at high speed; working against high pressure;
packing rings in air piston badly worn; air cylinder worn; defective air
valves; air passages or air discharge pipe partially stopped up; leaky
piston rod packing; lack of lubrication.