P/S B7100/7200

[Elsie71]

I don't know if parts would still be available. I can still get any part for my B7100 and I would assume those parts would be available also.

 

[mrgraphixx]

I have a B7200, with power steering and I bought a 1640 loader that will not function because the previous owner must have changed the hydraulic block with a 4 port variation and my dealer has no clue whaere the block came from.

Do you have a picture of the 8200 block, or can you describe it? Mine has 4 ports, and the power steering outlet.

 

[lp333]

... I put power steering on mine many years ago. I used a unit made for a B7200, part # 96319-3831-1. I had to adapt it, but it was not too difficult...

Elsie, I wish to compliment you on doing such a fine job installing PS on your B7100. I looked into this matter a couple of years ago when I still had my wonderful B7100HSD. I spent a lot of time talking to several Kubota dealers and even hydraulic parts suppliers. I finally gave up on the idea when I could not find the expertise nor the parts to bring this challenging project to fruition in a professional manner. However, you have done a very professional job on your B7100, and you are to be congratulated for it. LP

 

[robbieo11]

ya i wish mine looked that good see below

 

[Elsie71]

Thank you. It has worked very well for me. I was lucky to find the unit at my dealer back then. I think back then I spent about $6-700, but the parts, if available, would no doubt be more now. I used my tractor today to blow snow off the drive.

 

[chrisinnh]

Elsie, could you please explain what's going on inside the hydraulic mechanism on the right side of the tractor?

I see you've got two of the lines going to the factory hydraulic splice location, and the other two (those with springy strain relief) appear to go to the actuator over on the left side.

Is this device just a tap? some kind of flow divider?

I can't understand why the 3pt will not raise at idle unless hydraulic fluid coming out of the pump side of the splice returns to the trans some way other than through the 3pt side of the splice.

Thanks for posting this very interesting information.

/chris

 

[Elsie71]

Chris -

This hydraulic mechanism/device is actually the hydraulic block off a B8200. It already had an outlet for power steering, and you are right, the two springy looking lines run to the actuator on the power steering cylinder. The other two lines just complete the circuit to the factory hydraulics for the 3 pt. (and/or the extra outlet under the seat for a remote cylinder). I assume that since the volume created by the hydraulic pump is so low, the flow divider built into the hydraulic block sends all the fluid to the power steering at idle. I looked for just a flow divider, but I could not find one at the time that was either adjustable or that would not send all the fluid to the power steering. This has not been a big problem. I don稚 have to run at full throttle for the 3 pt. to work, just a little above idle speed. The 3 pt. lifting capacity does not seem to be less than before. It will easily lift anything I need, including my snow blower, rear mower or anything else I have tried.

I also had to replace the top/front half of the original hydraulic block on the tractor to provide a place to tap into the tractor hydraulics. It was a stock item normally used for a front blade, snow blower, loader or other attachments that needed hydraulics.

 

[mr.pauls@verizon.net]

I have seen recent posts on putting power steering on a B7100. I put power steering on mine many years ago. I used a unit made for a B7200, part # 96319-3831-1. I had to adapt it, but it was not too difficult. I had to replace the front half of the hydraulic block with one for a front snowblower to tap into the tractor hydraulics. I also used a hydraulic block from a B8200, because it had outlets for the power steering. I fed it from the new hydraulic block and the return went back to the block. The only downside has been that the power steering takes 1 gal. of the 3 gal. hydraulic output and the 3 pt. will not raise at idle. This has not been a problem and this inconvenience is way offset by the convenience of the power steering.

I HAVE LOOKED AT YOUR PICTURES AND READ YOUR INFORMATION, BUT CANNOT MAKE SINCE OUT OF IT. THERE IS NO RETURN LINE BACK TO THE HRDRO. PUMP. WHAT I SEE IS A FLOW GOING FROM THE BLOCK, TO THE RAM AND BACK TO THE BLOCK. THERE NEEDS TO BE A RETURN LINE GOING BACK TO THE PUMP WHICH IS THE TRANSMISSION. THIS VERY WELL BE WHY THE 3POINT HITCH IS SLOW BECAUSE FLUID IS LEAVING AND NOT RETURNING. MAYBE I AM MISSING SOMETHING. PLEASE ADVISE. THANK YOU.

 

[Elsie71]

It may be a little hard to explain, but I intercepted the hydraulic flow with the block on the side of the tractor. The additional block from a B8200/9200 has a built-in flow divider and diverts approximately 1 gal./min. to the power steering cylinder. The rest of the flow runs through the second block on to the original tractor hydraulics to run the 3 pt. hitch. The flow from the pump is only about 3.7 gal./min., if I recall correctly, so the power steering circuit uses up a substantial portion of that, and that is the reason that I have to have a little throttle for the 3 pt. hitch to work. The oil returns exactly as it did before. The 1 gal. flow circulates through the power steering cylinder control to push or pull the cylinder, depending on the input from the steering wheel. The first small block was designed to provide hydraulic flow for a front snow blower, loader, or other attachments on the 7100. The second block was all I could find at the time to divide the flow for the power steering. It also has outlets for other attachments, but I don稚 use them. As I stated, the oil returns to the pump just like it did before, so I don稚 think that is any different. The benefits from the power steering far outweigh the slight inconvenience of the three point not working at idle. I suppose I could try to see if a pump from a larger or newer tractor would fit on my 7100, but I don稚 think it would be worth the cost or effort.

Let me know if you need any more information.

 

[mr.pauls@verizon.net]

YOU HAVE A LINE COMING FROM THE HYDRO PUMP TO FACTORY BLOCK AND THEN INTO A DIVERTING VALVE, THEN OVER TO THE POWER RAM, I GOT THAT, BUT WHERE IS THE RETURN LINE BACK TO THE PUMP? THERE IS ONLY ONE LINE THAT I SEE, LEAVING THE PUMP, BUT NONE GOING BACK TO IT. SORRY I'M HAVEING TROUBLE UNDERSTANDING. THANK YOU.