Question about Craftsman 1 Hp, 4 Gal. Air Compressor
I have a craftsman air compressor model 919.166442. 150 PSI 16 gallon tank. The outlet tube has split. Is this difficult to repair?
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Posted on Jan 02, 2017
Don"t worry, even the best techs overlook a thing or two during repairs. Lets go over some basics to determine where fault is located. You will need to do some simple tests. If there are leaks the compressor may not reach set pressure. I use soapy water on all connections and on the head/headvalve while compressor is running. Make repairs as necessary. If still low pressure, while compressor is running and has reached max obtainable pressure (still low 70 - 80 lbs), carefully place finger over intake port hole (remove filter). If the compressor is pumping normally but leaking there will be ample suction at intake and cause the compressor to speed-up when intake is obstructed with finger. If you feel plenty of suction and no visible (soapy water) leaks, then the problem is probably the cylinder /ring is not correctly seating and air is leaking past cylinder. Make sure that the cylinder /piston ring is properly alighed and that the lip on the vinyl ring is up toward the head. If you do not feel suction but rather air seeming blowing out of the intake, then the problem is the headvalve plate/reed valves are leaking. The reeds must seal perfectly on their seats and not bent or have obstruction. Replace as necessary. Only one other thing to check and that is the intank check valve. Easy to check. Run compressor till you have about 70 lbs in the tank then unplug compressor. Carefully loosen the inlet hose at checkvalve and listen for air leaking out of tank. If leaking replace checkvalve. Use caution when removing head to try and save the gaskets. Good luck on your repair and email if you have other question.
Posted on Apr 22, 2009
Make sure that your outlet has power to it. With the compressor unplugged, open the cap on the pressure switch. Work the on/off switch and see if the contacts are engaging/disengaging. If they are carbonized, you can clean them with a fine sandpaper or emery board. Look for loose wiring and tighten all wiring connections.
Posted on Jul 19, 2009
The spec is 25-30 ft lbs.
Here are the specs.
Posted on Oct 10, 2010
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