1Z721 Takes forever to build pressure
by Rad W.
Speedaire 1Z721 compressor
I have a 1981 Speedaire 1Z721- 60gal., 2 stage, 240v, 5hp with pump# 3Z180.
This year it started taking longer to build 100+ lbs to run air tools.
Now it only goes up to around 80-90lbs after 30= minutes or so.
Not sure if this is something worth fixing or if I should just replace the compressor pump.
Oil is OK, the air intake port with filter cover removed seems to suck in good. No air leaks or oil coming out anywhere that I can see so not sure if something is blown internal that can be fixed easily or if a big tear down would be required.
Can you advise where I should start on debugging this please and if parts are still available for this model?
Thank you very much.