B7200HST Power Steering Help

[boltman63]

I've owned the B7200 for 5+ years, and was told when I bought it that the power steering didn't seem to work, which ended up being the case. It steered a little hard, but hey, I now owned a tractor I used it up until last fall when PS fluid started to leak from the top of the steering column. I pulled the steering box, and took it to a friend that had a hydraulic repair shop. They found a seal kit to install, which took care of the leak, but they put something back in wrong. The tractor will ONLY STEER LEFT. The piston on the steering jack extends, but won't return, to let the wheels go back right. I can jack the front end up and turn the wheels back by hand. Is there anywhere to get a schematic of the steering box? It has a series of plates, sandwiched around springs, ball bearings, seals, and o-rings. From what I am told, those plates have to be exact, to keep the steering "in time", and I have no way of knowing without a diagram of the steering box. Any help at all would be GREAT!!! Thanks!!

 

[North Idaho Wolfman]

I've owned the B7200 for 5+ years, and was told when I bought it that the power steering didn't seem to work, which ended up being the case. It steered a little hard, but hey, I now owned a tractor I used it up until last fall when PS fluid started to leak from the top of the steering column. I pulled the steering box, and took it to a friend that had a hydraulic repair shop. They found a seal kit to install, which took care of the leak, but they put something back in wrong. The tractor will ONLY STEER LEFT. The piston on the steering jack extends, but won't return, to let the wheels go back right. I can jack the front end up and turn the wheels back by hand. Is there anywhere to get a schematic of the steering box? It has a series of plates, sandwiched around springs, ball bearings, seals, and o-rings. From what I am told, those plates have to be exact, to keep the steering "in time", and I have no way of knowing without a diagram of the steering box. Any help at all would be GREAT!!! Thanks!!

Well that power steering is not stock, B7200's never came with PS.
Is it the type that mounts to the pitman arm, or is it the gear box type?

 

[boltman63]

There is no pitman arm, or gearing. I guess that I should've called it Hydraulic Steering. The steering box is made up of a series of plates, with 5 hydraulic ports on the bottom. It sure looks to be stock. There's nothing on it that looks like an aftermarket piece. The guy that I bought it from, had owned it for over 10-years, and was told when he bought it, that the steering was stock. Besides texting you a couple of pictures, is there anyway to post them on OTT?

 

[North Idaho Wolfman]

What you are explaining is Hydrostatic steering and I can guarantee you it's 100% not stock to that tractor.
They didn't start using hydrostatic steering till much later tractors.
And I doubt it's even Kubota, as kubota Hydrostatic units are 4 hose units not 5.
That said yea pictures would be great.
You should be able to post pictures after your 5 the post.

Any name or numbers on the hydrostatic unit?
Most have a tag on them.

 

[SidecarFlip]

If it only steers LEFT, you need to plan on only going left.

 

[boltman63]

I did get a picture to upload, but I have no idea where it uploaded to I like the plan to steer left idea Maybe I can enter a few tractor races at the fair

 

[North Idaho Wolfman]

Here is your valve:

I've searched everywhere I can think of, there are some close matches but nothing exact.
Try and find me any numbers off of it.

It's not a Kubota valve... Well not for tractor use anyways.
The kubota valves only have 4 ports, no 5th port for Power beyond.

Need to figure out what use the valve was used for originally to get rebuild spec on the internals and plates, because both have timing marks and orientation.

If all else fails, you can get a different orbital valve to replace it.
One of these valves might be a great candidate to replace it.

https://www.ebay.com/i/401709432079...QrbbrDqIQaWsfqL-CsIn2pse37we0Gi0aAt8dEALw_wcB

https://www.ebay.com/i/113743053728...o&sd=113735106106&itm=113743053728&pg=2385738

 

[aenos04]

Here is your valve:

I've searched everywhere I can think of, there are some close matches but nothing exact.
Try and find me any numbers off of it.

It's not a Kubota valve... Well not for tractor use anyways.
The kubota valves only have 4 ports, no 5th port for Power beyond.

Need to figure out what use the valve was used for originally to get rebuild spec on the internals and plates, because both have timing marks and orientation.

If all else fails, you can get a different orbital valve to replace it.
One of these valves might be a great candidate to replace it.

https://www.ebay.com/i/401709432079...QrbbrDqIQaWsfqL-CsIn2pse37we0Gi0aAt8dEALw_wcB

https://www.ebay.com/i/113743053728?rt=nc&_trkparms=aid=222007&algo=SIM.MBE&ao=2&asc=20160908110712&meid=305d54ea1c0c483b80bc14eb4447a11b&pid=100677&rk=1&rkt=10&mehot=lo&sd=113735106106&itm=113743053728&pg=2385738

This is a steering 'column' from a John Deere 318 lawn mower. I have the same on my b7200.
blew a seal, and couldn't find anyone that would work on it. Just ordered a good used one on ebay.