The cap on the end of the desiccant chamber of the Hitachi compressor is plastic and can develop a microscopic crack between the two pipe inlets/outlets causing a loss of air when the compressor is running. As part of some rebuild kits or as an individual part you can buy metal caps that do not leak. Here is one to give an idea https://www.ebay.com.au/itm/For-Lan...ompressor-Dryer-End-Cap-Hitachi-/321594899233
I only paid about half that and got it from the US (Miami) but cannot remember where - Dr Google should be able to help you find cheaper options.
Garry
I only paid about half that and got it from the US (Miami) but cannot remember where - Dr Google should be able to help you find cheaper options.
Garry