I have a CP 550A gas compressor which is seizing after 30 minutes of running. The bearings after 10 minutes look like they have months of run time on them. Our mechanics have been meticulous in rebuilding the compressor holding the closest tolerances that they can. We have rebuilt this compressor 5 times, replacing crank, bearings, connecting rods, cross heads, and line boring the frame. And still the connecting rod and main bearings are failing. It appears that the bearing are starving for oil but we can get anywhere from 60 to 110 psi of oil pressure and when the oil pump is actuated by hand when get oil throughout the system.
Hoping someone on here might have some ideas.
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