You'll notice the other 2 ports in the valve are still plugged. Those will have 2 couplers mounted directly to the valve.
In all honesty the biggest reason was for safety. This tractor will be used for pulling a disc with hydraulics, hay cutter, and other implements that require hydraulics and a hitch. If the hitch somehow came unhooked the hydraulics would pop out without tearing up the hose, etc. I was also worried about the weight of the hoses on those fittings.
I've seen some pretty tore up hydraulic systems due to that.
I was once shredding some cotton and the hitch on a newer bush hog shredder broke lose and luckily the hose popped out without tearing anything up.
The other reason was the simplicity of hooking up hoses. If hoses are under pressure sometimes it takes 2 hands to push it in. With this method you can do that by using both hands on the hose and pushing it into the coupler. The internals slide back to release the balls and allows it to seat in the coupler.
In all honesty the biggest reason was for safety. This tractor will be used for pulling a disc with hydraulics, hay cutter, and other implements that require hydraulics and a hitch. If the hitch somehow came unhooked the hydraulics would pop out without tearing up the hose, etc. I was also worried about the weight of the hoses on those fittings.
I've seen some pretty tore up hydraulic systems due to that.
I was once shredding some cotton and the hitch on a newer bush hog shredder broke lose and luckily the hose popped out without tearing anything up.
The other reason was the simplicity of hooking up hoses. If hoses are under pressure sometimes it takes 2 hands to push it in. With this method you can do that by using both hands on the hose and pushing it into the coupler. The internals slide back to release the balls and allows it to seat in the coupler.