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Re: Yellow Pasty Deposit in Air Dryer Purge Valve
Posted to HD/Fleet Forum on 8/24/2020

Just to clarify my reply earlier. This comes from minor oil slipping past the compressor piston rings and it mixes with humid air being drawn into the compressor. The drier keeps much of this moisture out, but not all of it. Replacing the drier may help reduce... Login to read more.