P160 upon shutdown blows oil out around compressor shaft.

P160 diagrams may help visualize the P160 airend-2

P160 diagrams may help visualize the P160 airend-2

P160 diagrams may help visualize the P160 airend-2
diagrams may help visualize the P160 airend-1

Just got an Ingersoll Rand Model P160A-W-W with a gasoline powered White Industries motor. It starts, runs and does very well UNTIL the key is shut off. Then, out around the one rotary compressor shaft, oil spews out under great pressure, even though we have simultaneously released air pressure with the manual relief valve.


The blowdown valve is energized but I don't really know if it's working. This unit has the radiator for the engine at the opposite end from the gas motor. That is the radiator is at the back while the gas motor is up in front, with the Rotary Compressor in between. The fan for the engine's radiator actually is driven by the one rotary impeller's shaft stuck out thru the head on the compressor with a fan bolted on it and also a belt pulley system running the generator.

I have removed the shaft cap which contains a rubber seal (which 'looks' O.K.)that seems to be in the area that is allowing this pressurized blowby to occur on shutdown. It drips hardly a drop while running, but a real gusher on shutdown. Is the blowdown valve not really working? Is there another item in this system that seems to be allowing this sudden head of pressure which is obviously too much for the poor seal to withstand?

Also, if anyone has a lead on a source for a parts/service manual for this particular machine please post it for all to see.

Thanks,

Butch

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Ingersoll rand 160 compressor over pressurize and blows check valve

by Tim
(illinois)

Compressor starts idles down, when you push the switch to use service air engine raises RPMS, if use of service air is shut off unit does not idle down and blows check valve open on oil seperator.

Over pressurized like unit continuously builds pressure, doesn't release airend pressure

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