Compressor slows to a turtle speed as pressure grows
by Russ Rodrigues
(SF, Ca USA)
when starting my 1998 5 hp verticle compressor starting #909 and ending in 221 starts building pressure then around 40psi the motor will slow to a crawl and stop., usually blowing the 15 amp breaker.,at the box.
And when I reset the breaker to start again the motor will be verrry slow then thats it.
I've gotten a new check valve and it is in better shape than the one I replaced, and at least this one hisses when I shut it down. I believe I have multiple buddy bugs here., more than one prob.
The pump works smoothly and doesn't seem too bad however the motors under load craps out.,air is pumping into the tank which is 20 or more gallon one, but doesn't reach limit enough to shut down on its own.,like it used to.
my start cap measures OL on measuring with ohmmeter and on dc voltage setting doesn't measure down w/meter power.
Could this mean my cap start is bad? I ran it w/out the start cap briefly just with the run and it ran slowly by itself but the motor will not run w/out the start cap .
What could I be looking at with this prob. ,I don't want to keep throwing money at this thing . new caps or caps ,bad motor windings ,centrifugal switch, pressure switch, unloader valve or even the pump on this oil less compressor. Need lot a attention pls.