Detroit 60 Series Air Compressor Unloader Valve

My unloader valve is leaking replaced unloader valve still leak blows off through brass valve on top of compressor what else could be the problem.

Detroit 60 series air compressor unloader valve.

I have a 04 columbia with detroit 60 series when i start my truck and start building air pressure. Air entering the unloader port acts on the unloader piston causing the figure 4 typical compressor drive flanges piston to move upwards away from its seat on the valve plate assembly. It will let me build pressure up to 120 125. Email us call us 888 940 5030 log in register 0 log in register.

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A 2nd one was replace still the same problem. And when you need maximum air delivery the bendix ba 922 big twin air compressor is for you. When the unloader piston is unseated an detroit diesel s60 figure 6 ba 921 compressor unloader system compressor. I have changed all head gaskets.

Air from the pop off valve.