husky vertizonal - disassembling compressor pump - how to vent air

by Talon
(Texas)

I have a husky vertizonal compressor from which I wish to remove the pump and disassemble it. My question is this: how can I know whether there is trapped inside the cylinder residually dangerous air pressure before I begin to disassemble the pump, or is this even an issue? Given such a possibility, is there a way to drain the latent pressure from the cylinder before attempting any disassembly?

Thank you for your time and courtesy.

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Bill says...

Talon, excellent question, and one that hasn't been asked before, I don't think! :-)

If the compressor unloader valve is operational, and if the compressor has been running to normal cut out pressure and stops on it's own, then the air that might be trapped over the piston should be vented when the compressor stops. When you drain the tank, there should be no air left in the tank or over the piston.

To be doubly sure, open the line between the top of the pump and the tank. You will likely have to do that anyway, and in so doing you are going to vent any air that may be trapped over the piston.

When you have loosened the fitting nut, if there is air trapped, you may have a bit of a struggle getting the tubing disconnected, as any air pressure there will make this process a bit difficult. The volume of air is almost inconsequential at this point, and as long as the tube isn't pointed at someone's eye, if there is air trapped, it will only be a bit and vent virtually instantly.

Cheers, and it is always good to be careful!

Bill