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JI Case 1070 Steering Gear problems

O

OldMan41

New User
My brother-in-law recently purchased one of these tractors in decent condition. It used to have a loader on it prior to him purchasing it. The problem that we are having is that every time we turn the steering wheel we are breaking one of the 4 end caps that are bolted onto the side of the steering box(2 on each side). We got the steering stops fixed. The pistons inside the steering gear never touch the end caps. We ordered a new one and he just started the tractor up and barely turned the wheel and snap, it broke again. In looking the tractor over we discovered that it has a newer reman hydraulic pump on the back of the tractor just above the PTO.

Is it possible that there is too much hydraulic pressure building up? If this is the case where would a person look to find the pressure relief valve or hook into the hydraulic system to determine how much pressure is coming out of it? What is the proper pressure and flow out of one of these pumps?
 
I have seen them break only once,, the steering gear had been apart and it was out of time,, you say this one is not though,, the relief is in the power brake valve if equipped with power brakes if not there is a relief by the firewall, unless someone has turned it down tight I am thinking that is not your problem
cnt
 
The relief valve seat part #G35351 could be backed out causing too much pressure. Can be checked w/o removing power brake valve assy.
 
Has this been a problem ever since owning the tractor? When it broke again had the steering gone against the stops? Either way it does sound like there is to much pressure and like dwag mentioned the seat can work up increasing it. If the pistons are not hitting them that is about the only thing that would crack them. With the front wheels up off the ground and the hyd lines unhooked in front you should be able to manually pull and push the wheels turning them from stop to stop easily. If not you could have seized spindles or something causing it to turn very hard which in turn causing the pressure to go so high. Have to check it out and let us know what you find. Rod.
 
Thanks for the help guys. I've been talking to him about what you've been saying. We're kinda busy with tractor repairs at the moment. We're replacing the front end on a Farmall 504, the entire motor on a Farmall 706. We also got our Case VAC running after sitting for 20 yrs.
I only have 1 question though. Would anybody happen to know where the relief valve is located on the power brake valve?

I will let y'all know what we find out.
 
If you have the power brakes it is in the valve block bolted on the firewall which the brake pedals attach too. It is removed out the top of the block, a very simple spring and ball. A diagram would be helpful for you to see its exact location and make up. Some had a adjustment on the top also. Rod.
 
You can get diagrams from CaseIH
https://partstore.caseih.com/us/parts-search.htm
If the diagram I am trying to post actually posted - I believe the relief is figures #14-#24, if this is the valve you have on your tractor....The way I understand it from a question I posted a few weeks ago, and as mentioned below, #23 can screw out, and cause an increase in your pressure. I believe mEL said there was a service bulletin on that issue.
a169827.jpg
 
Well we finally got time to take a look at the relief valve on this tractor last weekend. When i took the valve apart we noticed that the disc/washer that sits on top of the ball was bent at the edges. Is this piece supposed to be bent like this or straight? We have gotten a service manual for it also but it doesn't mention if it is supposed to be flat or not. I'll have to check the seat that the ball sits in to make sure that it hasn't backed out at all the next time that we work on it.
Thanks for all of your suggestions.
 
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