You can take off the valve manifold assy and reinstated as a whole unit. The instructions show you how to take it apart.
Take off the hex cap screws and raise up the manifold off the motor end cap. There are two ports that are closed off with orings and two joining ports that have other rings on top of the orings. It is rectangular in cross section and ever so grooved on one side where they join up with orings.
The orings need to put in the port with the whole counterbore. The orings and other rings are a match in the ports when they are machine type grooves. You will need to in the orings first then any other rings you have. Torque on this is about 16-21 ft. lbs.
If you should need help with this, call us at 662-871-8403 or 800-361-0068
tupelohydraulics@gmail.com