sounds like an oil return return problem, seeing you have lost a compressor already.
you def want to get to the root problem, could be a piping issue.
r&r'ing a 40hp semi on monday, apparently the 4th in 3 years.
Will be many hours of investigation before this one is left on its own, lack of lube.
good luck with yours.
replace contactor! oil pressure is fine, one leg of contactor is bad, overload opens before the oil pressure switch, when you get there you manually reset oil, but the overload closed long time b4.
i sort of have the same problem with my TRANE 6 cyl. model E (open type) overhauling it right now i noticed a scratch on the oil line going to the seal end bearing but did not notice any problem with the bearings...could anyone help me on what to do with the scratch or should i just ignore it..i maybe off the topic sorry i am new to the forums
What made the scratch? Is it deep enough to allow oil to escape? My copeland just quit tripping out on oil pressure and I don't know why. Once the weather cooled off a little it stopped tripping. I can't see any correlation between cooler weather and the problem with oil pressure. I never saw abnormal head pressure or suction pressure. It never ran hot so I can't see it going out on internal overload or high temp. The only abnormal thing I witnessed was a drop in actual oil pump pressure out put a few minutes after start up. Which leads me to suspect an internal oil leak.
i think it was from a previous failure though it has a scratch on the oil line no evidence from the bearings that i took out and replace that i lacked lubrication,,it is not deep enough for the oil to escape as per my inspection i need your opinion can i use metal epoxy to patch it up or just simply leave it as it is thank you sir for the reply
Since you do not have a picture, it is difficult to say. I would lean toward replace versus epoxy repair. If the scratch looks old and you aren't having any issues then it might be best to leave it alone.
well i started the compressor last night it went great i had 60psi back pressure an oil pressure of 140psi and a head of 250psi thanks for the advise my friends :cheers: