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Craftsman 120-volt Air Compressor/inflator - Page 3 Questions & Answers
I have a Craftsman 2-gallon 1.5 HP air compressor,
Is there pressure in the tank already? The reset is usually on the end of the motor.
The pressure switch, a diaphragm pushes against an adjustable tension spring. Less spring tension cuts the motor out at lower pressure, more tension at a higher pressure. Has this adjustment been used? It may have a second adjustment, either nut or screw, that adjusts the pressure differential between cut in and cut out.
I have an old 5hp 20 gallon horizontal Craftsman
possibly an installation problem
most control units screw directly into the tank and the pressure is read directly to the diaphragm that controls the switching
check if the bleeder line is supposed to be attached to the control unit at all
unless you have a peculiar set up the compressor line goes to a nonreturn valve into the tank
there is a relief valve in the tank that blows off when dangerous pressures are reached ( around 120 psi)
there is a fitting where the control screws in and that reads tank pressure to control the on/off of the motor
Craftsman air compressor will not build pressure
common problems are
failed poppet valves or reed valves
broken springs for poppet valves
failed non return valve in the pipe to the tank
pull the head/s and check the poppet valves or reed valves
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