Compressor Refurbishment – Part 3

Since the compressor is apart, I might as well check out the head and see what needs to be repaired in it. Since the head was off the unit, I pulled out the pistons. Dirty, but overall they don’t look worn or damage, which is nice. The big one is the low pressure piston (compresses air from outside), the small one is the high pressure piston (compresses air from the LP piston).




Dirt on both will be removed with some disk brake cleaner (it was handy), and they should be ready to go back in. Time to check the cylinder bores. First the low pressure, then the higher pressure.


Looks like the exhaust valve on this is pretty rusty. Maybe caused by condensation as the hot compressed air is forced out past it? You can see another of the seals here. They’re used at all the connection points, I’ll have to grab a plastic scraper to remove them.


Not the greatest picture, but again the exhaust valve looks a little rusty. Of course, to pull the valves I had to drop the head back on the crankcase. Poor planning on my part.

Those are some pretty rusty valves…time to clean those up, order replacement gaskets, and pull the bearings on the crankshaft so it can be mounted onto the lathe.

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