Leaking Non Return Valves in the Valve Block

The compressor o-ring was pushed hard against the head and has now stuck to it, so I'm guessing I'll destroy it when I attempt to remove it. I guess that the o-ring was supposed to work in the grove on the top of the cylinder but it probably got misplaced and was destroyed, so it is probably leaking.

Will report back when I change it

mcapinha said:

The compressor o-ring was pushed hard against the head and has now stuck to it, so I'm guessing I'll destroy it when I attempt to remove it. I guess that the o-ring was supposed to work in the grove on the top of the cylinder but it probably got misplaced and was destroyed, so it is probably leaking.

Will report back when I change it

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No not that O ring. I am not talking about the O ring that sits in the head to seal top of cylinder. If you look at the piston itself there is a groove around the press on boss that you remove to fit the piston seal. I have seen O rings in that groove if there is one take it out. It causes the seal to round and not seal correctly. When you change the seal the press on retainer boss MUST be tight against new seal, seal should be hard trapped and not be able to be spun around.