Case XT case drain - fitting size?

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jedpublic

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Aug 8, 2025
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I did not want to hijack the other thread, so I started this one.

I have a Case 70 XT and want to install a 3/8" case drain. Does anyone know the fitting size for the returns to the hydraulic reservoir?

The 70XT hydraulic reservoir is located in the left rear loader frame upright. The yellow box outlines the fill cap, which controls the pressure of the reservoir to 5 psi, and will allow make-up air to enter at .5 psi vacuum. The blue lines are the "sight gauge." The red and green circles are where large return hoses are connected to the reservoir; I have visualized the ones in red, but not the green.

Case70XT - left rear pillar.png


Here are some pictures of my actual machine:
Case70XT - reservoir rear looking forward.jpeg
Case70XT - reservoir top looking down.jpeg


Per Topper1 picture, other models have a case drain service kit:
Case 87685967 loader arm case drain kit.png


So it makes sense to replace one of the 90-degree fitting with T-fitting that will allow me to connect my 3/8" case drain line to it. Can anyone help with this?
 
All the fittings should be standard JIC for hose ends or standard pipe thread for tank access ports. Some later tank ports were ORB which are easy to identify by the nut on the fitting @ the tank wall.
 

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