430 triple range hydraulics

The torque tube and transmission are separated at the interface flange just aft of the triple range shifter cover or as viewed from the right side, just inboard of the foot throttle. The torque tube hyd oil is the higher level and can leak into the transmission if the drive shaft seal, seal retainer gasket leaks and/or pinion shaft end cover gasket leaks. The hyd oil from the torque tube can be forced pass faulty eagle hitch piston seals into the transmission. There will be some seepage pass these piston seals but is negligible, just the nature of the beast. If normal operating oil levels are close, I don�t know of any way that the transmission oil can leak into the hyd oil.

The eagle hitch has a single acting piston, the supply and return oil is the same line, controlled by the position of the lever operated control valve.

Joe

On the 300-400's I have seen the eagle hitch hyd supply/return oil line attaches to the front of the interlock block on the right side of the lower control valve.

That interlock block is setup for single acting. To change it to double acting or 2 way, detach the block and put a 1/4" countersunk head pipe plug in the interior oil port. Bolt it back on the control valve. Hook up a line where the plug is aft of the present eagle hitch line. That will give you supply and return for remote double acting cylinders and will be controlled with the present hitch lever. If you just want to use these lines as supply and return to remote valves for a loader or whatever, wire down the hitch lever in either position depending on which line you want to be the supply and the other return.

If your hyd control system is other than what I have described above, I am not familiar with it.

Joe

You now have a single-acting control valve/interlock block setup that can be changed to double-acting.

Check the link, find where you are now and figure out the best way to get where you want to be.

Joe

• Basic hyd systems

I'm just down the road outside Clayton. Buyer's Tractors (just outside Chrysler) likely has a valve if you wanted to add another. That's the way my 630 is set up. I don't know how much would be involved in installing it.