Our new hydraulic unlock tool for Pioneer couplers is designed to snap onto the male or female end of a hose thats under pressure. It lets you quickly relieve the pressure for easy hook-up by just turning a screw.
The tool makes use of a center screw with a roll pin. A male hose coupler hooks up to one  end and a female coupler to the other. Turning the roll pin one way causes the screw to push against the plunger inside the coupler, which opens a valve to relieve pressure on the hose. Hooking up auxiliary equipment to a skid loader requires two hoses, one male and the other female, and the unlock tool is designed accordingly.