Question about Air Tools & Compressors
I have a 6hp 30 gallon oiless compressor model 919 165140.The ring broke and scored the cylinder. I replaced the rod,ring, cylinder,and gaskets. Now I can only get 70 psi? It will continue to run but not get over 70 psi?
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
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Feb 06, 2015 | Craftsman Air Tools & Compressors
Aug 10, 2012 | Craftsman 33 Gallon Vertical Portable Air...
Jun 11, 2012 | Craftsman Air Tools & Compressors
Feb 18, 2011 | Craftsman 3 gal. Air Compressor, 1.5 hp,...
Aug 10, 2010 | Craftsman Air Tools & Compressors
Dec 13, 2009 | Craftsman Air Tools & Compressors
Jul 06, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...
Jun 29, 2009 | Craftsman Air Tools & Compressors
Jun 26, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...
Mar 17, 2009 | Craftsman Air Tools & Compressors
758 people viewed this question
Usually answered in minutes!