Copeland 510-0142-00 Oil Check Valve Assembly

The Copeland 510-0142-00 Oil Check Valve Assembly is the OEM oil check valve for Copeland compressors, supplied as a complete hex-head threaded assembly with a tapered male pipe thread and a drilled through-bore that installs directly into the compressor’s oil circuit. A check valve is a one-way valve: it passes oil in the intended direction while the oil pump is building pressure, then seats and blocks flow the other way when the compressor cycles off.

On a service call, this is the small part that tends to get overlooked until oil pressure problems show up. A check valve that sticks open, leaks by, or has a worn seat can let oil drain back or bleed off, which shows up as slow oil pressure build-up at start-up, nuisance oil pressure safety trips, or a compressor that runs dry for the first few seconds of every cycle. Because the 510-0142-00 ships as a complete assembly, you replace the whole valve instead of trying to salvage a worn seat. Always match the part to your compressor’s model and serial number on the nameplate, and confirm the position against the compressor’s parts list before you pull the old valve.

Key Benefits

• Complete OEM Assembly: Ships as a finished check valve assembly with its threaded body, so there is no piecing together of seats and hardware.
• Protects Bearings at Start-Up: A working oil check valve helps hold the oil circuit primed so bearings and crankshaft surfaces are lubricated the moment the compressor starts.
• Cures Oil Pressure Complaints: Replaces a worn or sticking valve behind low oil pressure readings and repeat oil safety lockouts.
• Factory Fit and Finish: A Copeland part number, made to the same thread and seat specification as the valve the compressor left the factory with.

Common Questions

• What does an oil check valve do? It allows oil to flow one way in the lubrication circuit and stops it from flowing back, helping keep oil pressure stable through start and stop cycles.
• How do I know the valve is bad? Slow oil pressure build-up, oil pressure safety trips, or oil that drains back after shutdown point toward a leaking or sticking check valve. Confirm the rest of the oil circuit (pump, screen, pressure control) before replacing parts.
• How do I confirm this is the right valve for my compressor? Compare the Copeland compressor model and serial number to the parts list for your unit, and match the thread and hex size of the valve you are removing to the 510-0142-00.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.