B2401 Aux Hydraulics Project

[jbolt001]

Now that we have completed our move and I have my shop mostly organized I am able to start on installing the aux hydraulics. I am installing a third function for a grapple and a valve for top & tilt and one rear remote.

The third function kit if from Summit and it is for the B2601. I took a chance it would fit when I ordered it. The valve mount and the remote bracket fit perfectly on the 435 loader.



The loader valve is the same between the B2401 & B2601 so the supply line and fitting from the PB port will fit if just plumbing for the third function. The tank port on the case is different. The B2601 tank port is on top of the case whereas it is on the side on the B2401. The banjo bolts also have different part numbers so it is unlikely the fittings supplied will work. I have not removed anything yet to verify but I did order a replacement banjo bolt to measure. I am hoping if the fitting I have don't fit at least the thread on the case is a standard SAE.

For the top & tilt and rear remote I will be using a 3 spool valve mounted on the ROPS. This is the current mounting position. In this position the lavers are in a comfortable place and do not interfere with the 3-point lift lever.



Before I commit to this I have ordered some fitting to verify I can make the hose connections work. I think it will be okay.

I had originally envisioned using the rear remote port for the rear valve but as of now there is no factory adapter available. I have considered making one but the area is cramped. Here is the rear port location (outlined area). The arrow is pointing to the tank return port on the case.



Right now the plan is to run the PB port on the loader valve to the rear spool valve and then use the PB port on the spool valve to the third function valve. The only uncertainty now is plumbing the tank lanes from both valves back to the tank port on the case.

 

[TheOldHokie]

Now that we have completed our move and I have my shop mostly organized I am able to start on installing the aux hydraulics. I am installing a third function for a grapple and a valve for top & tilt and one rear remote.

The third function kit if from Summit and it is for the B2601. I took a chance it would fit when I ordered it. The valve mount and the remote bracket fit perfectly on the 435 loader.

View attachment 75486 View attachment 75487

The loader valve is the same between the B2401 & B2601 so the supply line and fitting from the PB port will fit if just plumbing for the third function. The tank port on the case is different. The B2601 tank port is on top of the case whereas it is on the side on the B2401. The banjo bolts also have different part numbers so it is unlikely the fittings supplied will work. I have not removed anything yet to verify but I did order a replacement banjo bolt to measure. I am hoping if the fitting I have don't fit at least the thread on the case is a standard SAE.

For the top & tilt and rear remote I will be using a 3 spool valve mounted on the ROPS. This is the current mounting position. In this position the lavers are in a comfortable place and do not interfere with the 3-point lift lever.

View attachment 75488 View attachment 75489

Before I commit to this I have ordered some fitting to verify I can make the hose connections work. I think it will be okay.

I had originally envisioned using the rear remote port for the rear valve but as of now there is no factory adapter available. I have considered making one but the area is cramped. Here is the rear port location (outlined area). The arrow is pointing to the tank return port on the case.

View attachment 75490

Right now the plan is to run the PB port on the loader valve to the rear spool valve and then use the PB port on the spool valve to the third function valve. The only uncertainty now is plumbing the tank lanes from both valves back to the tank port on the case.

You wont find SAE threads on those banjo bolts. They will be BSPP or (much less likely) metric. Either way they are standard hydraulic fittings you can purchase from a hydraulic supply house.

Making an adaptor for the tank return should be easy. I made a much more complicated one for mounting 3rd party remotes on an L3901.

Dan

 

[jbolt001]

You wont find SAE threads on those banjo bolts. They will be BSPP or (much less likely) metric.

You are correct. The banjo bolt on the 3-point hydraulic inlet is BSPP 1/4. The B2301 & 2601 use a BSPP 3/8.

 

[jbolt001]

I need to make a correction to my first post. I was calling the inlet to the 3-point hydraulics the tank port. That is not correct. The Power Beyond port from the loader valve goes to the 3-point hydraulics.

The tank inlet is on the side of the transmission.

 

[jbolt001]

Here is the modified Tilt Cylinder. I used a 2" x 4" stroke welded clevis cylinder.

The side link has about 3-1/2" of adjustment. The modified cylinder is about 3/8" longer than the side link when both are fully retracted.



I had a screwup when doing the final weld on the shaft. I was in the middle of the setup when I got a phone call. When I went back to do the weld I had not reattached the welder ground clamp directly to the clevis, it was still clamped to the welding table. I had taped the shaft to protect it from splatter and it was clamped into a v-block. A small gap in the tape allowed an arc from the shaft to the v-block making a pit in the shaft and the v-block. I was not pleased with myself.



For now I used a hard stone to remove any raised areas around the pit and filled it with some Devcon 10210. We will see how that holds up.

 

[TheOldHokie]

Here is the modified Tilt Cylinder. I used a 2" x 4" stroke welded clevis cylinder.

The side link has about 3-1/2" of adjustment. The modified cylinder is about 3/8" longer than the side link when both are fully retracted.

View attachment 76375 View attachment 76376 View attachment 76377

I had a screwup when doing the final weld on the shaft. I was in the middle of the setup when I got a phone call. When I went back to do the weld I had not reattached the welder ground clamp directly to the clevis, it was still clamped to the welding table. I had taped the shaft to protect it from splatter and it was clamped into a v-block. A small gap in the tape allowed an arc from the shaft to the v-block making a pit in the shaft and the v-block. I was not pleased with myself.

View attachment 76378 View attachment 76379

For now I used a hard stone to remove any raised areas around the pit and filled it with some Devcon 10210. We will see how that holds up.

Where did you get the replacement clevis ? That would be an interesting DIY bending job......

Dan

 

[jbolt001]

Where did you get the replacement clevis ? That would be an interesting DIY bending job......

Dan

The clevis on the shaft was made from 3 pieces.

 

[jbolt001]

(edited to correct loader valve PB port thread size)

I finished up the project but didn't have time to post as I went along so below is recap.

Tilt cylinder installed


The rod end for the top link was too large to fit where it attaches to the tractor. I had to grind about 3/16" off the outside and round the corners.



I drove the tractor for a while with the valve in place and determined it needed to be a little further away. I used some steel pipe as spacers.


On the inside of the ROPS is a mount for the rear remotes.


Here is the hydraulic tube from the loader valve PB port to the 3-point hydraulic inlet that is removed.



On the right is the 3-point hydraulic inlet banjo bolt and fitting that came with the Summit kit for the B2601. On the left is the stock banjo bolt for the 3-point hydraulic inlet. It is a BSPP 1/4-19 but flairs to a wider shoulder. The diameter is too large to use with the banjo fitting that came with the Summit kit. In the middle is a BSPP 1/4-19 banjo bolt and fitting I purchased.


Here is the new banjo bolt and fitting installed.


Here is the connection to the PB port on the loader valve. The SAE -8 / 3/8 JIC fitting from the summit kit works here. The loader valve is the same as the B2601. The thread is 3/4-16 or SAE #8. Not a BSPP thread like at the 3-point hydraulic input.

 

[jbolt001]

These are misc photos through completion.



On the ROPS mounted valve the return to tank is 1/2" ID fuel hose. That hose Tee's into the hose on the loader valve to tank. I used a 1/2" pex tee with band clamps.

 

[jbolt001]

Photos of the third function.


I picked up a keyed 12v source for the third function diverter valve at the rear tail light wiring.

 

[TheOldHokie]

Here is the connection to the PB port on the loader valve. The SAE -8 / 3/8 JIC fitting from the summit kit works here. The loader valve is the same as the B2601. The thread is actually a BSPP 3/8-19. The SAE thread is 18 pitch but is short enough that it is not an issue.
View attachment 76872

In addition to the difference in thread pitch BSPP uses Whitworth threads and a flat sealing washer. SAE uses Unified threads and a o-ring designed to fit in a recess. I would suggest you replace that SAE to JIC adapter with the correct BSPP to JIC adapter and sealing washer.

https://www.hydraulicsdirect.com/JIC-to-BSPP-p/9002.htm

Edit: After thinking about this it seems unlikely you could get a 3/4-16 UNF fitting to even start into a 3/8 BSPP port. I am thinking Summit provided the correct BSPP adapter shown below - they look a lot like an ORB port adapter.

Dan

 

[jbolt001]

Just measured it and the factory banjo bolt at the loader valve is 3/4-16.

Post above has been corrected.

 

[TheOldHokie]

Just measured it and the factory banjo bolt at the loader valve is 3/4-16.

Post above has been corrected.

That makes much more sense.

Dan

 

[1962siia]

Thanks for this write up. I ordered the same kit for my B2401. I don't have rear remotes yet so just installed it as close as I could to the instructions. First time ever installing hydraulic anything. I was able to use the Summit banjo bolt by removing the plug at the top of the rear case, under the seat, for my return line. I then purchased a plug to replace the top banjo bolt on the power beyond steel tube. My grapple arrives tomorrow so I'll report back how it all works. I appreciate your helpful post with all the pics! EDIT- grapple works great!

 

[Mikeymotorbikey]

Fabulous work and write up.
I recently purchased a 2601 and did not purchase the rear remotes with the tractor. Was going to add the Kubota factory parts at a later date but started finding reports that the factory Kubota valves are not that great, leakage issues. And the $$$ is a big downer.
Was thinking about adding my own but not really sure how to tie into the hydraulic system.

Was recently looking through the part diagrams on Messicks and found this kit, in the dash line box below, Kubota PN 6C040-95100.
It looks like this would allow a person to tap into the hydraulic system just as the factory remotes do.
Does anyone have experience with this kit? I'm assuming it gives a supply and return into the hydraulic system with some type of relatively common standard, BSPP, NPT, SAE oring?

Thanks

Mike

 

[TheOldHokie]

Fabulous work and write up.
I recently purchased a 2601 and did not purchase the rear remotes with the tractor. Was going to add the Kubota factory parts at a later date but started finding reports that the factory Kubota valves are not that great, leakage issues. And the $$$ is a big downer.
Was thinking about adding my own but not really sure how to tie into the hydraulic system.

Was recently looking through the part diagrams on Messicks and found this kit, in the dash line box below, Kubota PN 6C040-95100.
It looks like this would allow a person to tap into the hydraulic system just as the factory remotes do.
Does anyone have experience with this kit? I'm assuming it gives a supply and return into the hydraulic system with some type of relatively common standard, BSPP, NPT, SAE oring?

Thanks

Mike View attachment 87842

Looks like a hydraulic outlet block. Question would be what sort of ports it offers. Messicks wants $150 - you could make your own for about $20. But plumbing into the loader valve power beyond seems a lot simpler and cleaner.

Dan

 

[Vladhed]

Fabulous work and write up.
I recently purchased a 2601 and did not purchase the rear remotes with the tractor. Was going to add the Kubota factory parts at a later date but started finding reports that the factory Kubota valves are not that great, leakage issues. And the $$$ is a big downer.
Was thinking about adding my own but not really sure how to tie into the hydraulic system.

Was recently looking through the part diagrams on Messicks and found this kit, in the dash line box below, Kubota PN 6C040-95100.
It looks like this would allow a person to tap into the hydraulic system just as the factory remotes do.
Does anyone have experience with this kit? I'm assuming it gives a supply and return into the hydraulic system with some type of relatively common standard, BSPP, NPT, SAE oring?

Thanks

Mike View attachment 87842

Came across this thread and it reminded me of your question:

Kubota B2650 Auxiliary Hydraulics

Hello, I have a Kutoba B2650 and using a Powerhorse 3-Pt log splitter. I have purchased the auxiliary hydraulic kit which does a great job running the log splitter. The instructions indicated that when the implement is attached that you connect the kit and when it is not attached that you...

www.tractorbynet.com

Poster says 1/4" female ports for PB.
Would need to loop them together when not being used for 3 point to work.

 

[TheOldHokie]

Came across this thread and it reminded me of your question:

Kubota B2650 Auxiliary Hydraulics

Hello, I have a Kutoba B2650 and using a Powerhorse 3-Pt log splitter. I have purchased the auxiliary hydraulic kit which does a great job running the log splitter. The instructions indicated that when the implement is attached that you connect the kit and when it is not attached that you...

www.tractorbynet.com

Poster says 1/4" female ports for PB.
Would need to loop them together when not being used for 3 point to work.

According to the Whole Goods catalog the OEM auxilary valve kit does not work on a B2401.

However it is damn near trivial to tap into the loader valve power beyond circuit on a B2401. If you plumb in an external open center valve there is no need to loop anything together. Its three short hoses and a few fittings. If you also want to run a log splitter just put a quick coupler on the power beyond port of the AUX valve and use it do connect and disconnect the log spltter.

Dan

 

[Mikeymotorbikey]

Sorry to hijack this thread!
Thanks for the info everyone. Sounds like kit 6C040-95100 allows a tap into the hydraulics just as tapping into the loader PB, which may be simpler. Just wondering if 1 is more 'proper' than the other.

I was thinking of adding an open center 3 spool Cessna valve that I have on the shelf via kit 6C040-95100.
This would get me 3 remotes at the rear of the tractor. 2 for top and tilt and an extra for dump trailer or whatever.
I come from the industrial mobile hydraulics world where everything is a standalone component. The tractor world is a little different to me.
Is there a hydraulic system schematic available for these tractors?
Is there a proper place to tap into the hydraulic system on these tractors?
Is there a preferred place to tap into the hydraulic system on these tractors?

Mike

 

[TheOldHokie]

Sorry to hijack this thread!
Thanks for the info everyone. Sounds like kit 6C040-95100 allows a tap into the hydraulics just as tapping into the loader PB, which may be simpler. Just wondering if 1 is more 'proper' than the other.

I was thinking of adding an open center 3 spool Cessna valve that I have on the shelf via kit 6C040-95100.
This would get me 3 remotes at the rear of the tractor. 2 for top and tilt and an extra for dump trailer or whatever.
I come from the industrial mobile hydraulics world where everything is a standalone component. The tractor world is a little different to me.
Is there a hydraulic system schematic available for these tractors?
Is there a proper place to tap into the hydraulic system on these tractors?
Is there a preferred place to tap into the hydraulic system on these tractors?

Mike

Please - do not make this more complicated than need be. Its an ordinary open center system and worring about whether you insert your valve at the loader valve outlet port or on an inlet/outlet boss 2 feet down stream of that is hydraulically meaningless.

The primary question is where are you going to physically mount this Cessna valve? From there you chose a connection point that makes the plumbing easy.

Kubota used the outlet block on the side of the transmssion because it places their sectional valve stack underneath the lever guide plate. There are no hoses involved and it makes for a neat and ergomomic installtion but it requires a special hydraulic manifold and only works with their custom made stack valves.

You are going to have to run hoses to your valve so your pressure takeoff should be chosen accordingly. By far the easiest and least expensive is to insert your valve in place of pipe number 90 in this parts diagram. Remove and discard the pipe and install two male JIC banjo fittings in its place for your pressure out and pressure return hoses - $20 in fittings and boom - done. Banjo 1 is pressure out to your AUX valve and Banjo 2 is power beyond pressure return from your AUX valve. This is exactly how Kubota plumbs in the BH70 backhoe. Since you also need a tank return for your Cessna valve you can use the same one used by the BH70 (second parts diagram)

Alternatively you could spend $150 for this Kubota transmission adapter plate plus fittings to match it. It taps into the same circuit a few incehes down stream of where your return hose would be using the loader outlet. What possible advantage do you see in that?

Dan