Brand new Quincy hydraulic unloader assembly replacement, part number: 110827-001. This hydraulic unloader is used on Quincy compressors. This valve senses when your oil pressure reaches above 14 PSI. When this happens it cuts off the flow of air that is going to the unloaders which allows the pump to build pressure. When the compressor reaches max pressure and shuts off, the oil pressure drops below 14 PSI. This allows air to pass through to the unloader on the compressor relieving the air off the head for a load free start up.

How to tell if this part needs to be replaced:

If the compressor seems to be partially unloading while pumping you can remove the copper air line going to this valve. If the pump produces more air while the line between the hydraulic unloader and the head unloader is unhooked, the hydraulic unloader needs to be replaced.

Specifications:

• Part Number: 110827-001
• For Use With Quincy Brand Air Compressors
• Solid Brass Construction
• 1/4" Male NPT Port
• 1/8" Female NPT Side Port
• 1/8" Female Line Port