I have a 1958 340 utility and the hyd system does not work the block behind the seat was bypassed and not used I took off the lines that they made to bypass the block and it still does not work is there any info on internet to rebuild system and what is block for Thanks Ric

Ric,where abouts in Florida, do you live, I'm living in Bartow, Florida.


jack

Jack I live in Valrico

I'm in Sebring,. We have a work/get-to-gether day ,Sat. June 21st at the IH Bldg.,at Fly wheelers, come on over ,visit, BS ,
Chapter 27

Jack: There were two different systems used on 340s, one had pump driven off timing gears and placed just below distributor the other had pump in the torque tube. The pump in torque tube, while not visable had pressure line up right side to the control valves.

Having said this the pump may or may not be your problem. Just trying to get a handle on which system and anything else that may be modified. I presume the control valve levers are at right side of dash, right or wrong? Is the tractor equipped with fast hitch? If you are refering to what I think you are, the block behind the seat is a check valve designed to prevent hitch from leaking down. Those do go bad about every 30 years, and a lot of folks have bypassed the check valve rather than fix it. I'm not sure whether the reasoning has been availability of parts or cost of those parts. Most IH tractors from that era had that check valve, thus I suspect parts are available.

I may seem a bit vague, however I a bit uncertain whether only rear outlets don't work or is it the whole system doesn't work. If nothing works, I'd be looking serious at pump as the problem. Tell us a bit more.

Here's what Hugh is referring to. The block with the hydraulic hoses running to the FastHitch cylinder is the check valve. Rebuilding the check valve is a simple fix. There's an Oring in there that can be replaced. That, however, may be the least of your worries, as all it does is keep the hitch from leaking down. Remove the check valve, and any lines connected to it for now. Connect the two lines coming toward the rear of the tractor from the valve under the dash and under the seat, to the hitch directly, and see what you've got when you move the control. A picture of your set up would help.