If you have the standard female pioneer coupler, it is spring loaded. You have to push in on the outer ring and then pull the hose out. If it will not come out, you have to release the pressure in that line. Move the lever that gets its fluid from that line and it should release the pressure. Make sure the tractor is off, wear safety glasses and leather gloves, lay a rag or towel over the connector as you take it out. If you still have any pressure in there, it can penetrate your skin and cause a nasty condition. After you get it out, take the end of the coupler, wrap a rag around it, and push it against something away from your body, like the draw bar, and release the pressure in the line to the grapple. If you connected it when it was cool, and then got hot, the fluid will expand in the line. This is also true after you disconnect it. I tried to hook up my hay rake the other day and could not get the couplers to go in the remote. I had to hit it pretty hard on the draw bar to release the pressure, and if I did not have it wrapped in a rag, it would have sprayed everywhere. Be careful to protect your eyes and skin.