What a Compressor Overhaul Actually Replaces — Worn vs New
"Overhaul" sounds technical, but it comes down to one thing: taking out what has worn and putting in what is new. Here is what that looks like.
When a compressor is worth saving, an overhaul means opening it, measuring what is worn, and replacing those parts. It is not a coat of paint — it is new metal where the old metal has given up. Two photos show the before and after.
The decision is simple economics: if the crankcase and crankshaft are sound, replacing the wear parts is far cheaper than a whole new compressor. If the journals are scored or the case is cracked, it is a replacement. Knowing which is which on site — before you quote — comes from reading the symptoms first. I log each machine's history in R-Pro so the call is based on its real trend, not a guess.