Can I change my controls on my BH92 backhoe?

[kbplaza]

I want to change my backhoe controls on my BH92 to like the newer excavators. Can that be done on my BH92? If so how do I go about doing this? Thank you guys.

 

[rswyan]

If you're talking about the control pattern of the valve handles, my guess is that it would simply be a matter of swapping the hoses around, assuming all the hoses are of the same size ...

Although you may want to get an exploded parts diagram, as some of the lines may have flow restrictors on them. Good to know what's there before you pull it apart and maybe lose some small pieces.

My BH4690B had flow restrictors on certain circuits ... I pulled them for better/faster responsiveness.

 

[Sysop]

Define "change" a bit further please. Change as in 'change the function provided when a lever is moved a given direction?', or 'change the levers so they have the feel and precision control of the newer excavators?'?

If all you want to do is change the function of the levers, that can be done by rerouting the plumbing on the controls. You may need to have some hoses remade as they're generally made to fit with little to no slack and you may run into a case of a hose that is an inch too short to reach the port you want it in.

If you want to change the feel, that is going to require changes that will require replacing much more than hoses.

 

[WaxMan]

I want to change my backhoe controls on my BH92 to like the newer excavators. Can that be done on my BH92? If so how do I go about doing this? Thank you guys.

What are the newer excavators like?

 

[scotro95]

According to my dealer they can setup to whatever way you like, around here there is 2 standard control patterns. so that would lead one to believe that all the hardware and fittings are all the same. I selected the factory setup for my new l45 as that's what were used to on our other Kubota backhoes.

 

[boggen]

for the 555c TLB i have, there is i want to say 3 or 4 different options you can have,
3 lever, 4 lever, and joysticks. with a mix and match foot peddles, to deal with out riggers or possibly a extend a hoe option, or optional hydraulic thumb control.

when asking some operators that used to be day job running the machines. i got a lot of hassle about levers and joysticks, and some of them just plain said i don't want this or that control setup, it is to difficult to use. my guess they ran given machines for so many years, they had it down via muscle memory control, with a certain setup.

double check each valve before swapping hoses around, each valve might have a different spec, from pressure relief setting, to a check valve, and may simply be complete different inside "one made cheaper than valve right next to it" due to this or that reason.

it may come down needing to pull the valve manifold block apart, and moving the individual valves around and reassembling.

 

[Gary Fowler]

You just have to swap the hoses on the control valves, very easy to do. Just remove the access cover and then swap the hoses top to bottom and bottom to top on the dipper control.
Kubota dealer swapped mine back to Kubota configuration when it went in for service and I couldn't get used to operating it that way, so I finally figured out what they did and put it back like excavator.
I like it when you can push both joysticks forward and the boom lowers, dipper stick extends, pull back boom raises, dipper stick moved toward the tractor. This in effect allows you to pull back on both levers and the bucket comes back toward you at the same elevation making it much easier to keep bottom of trench level. You do have to adjust bucket angle to keep it flat as you bring bucket toward you.
Darn Kubota folks had it where I had to push left lever and pull right lever to retract bucket and reverse to extend bucket.

It did take me a while to figure out exactly what they had done to it though and was very frustrating.

Google backhoe controls to get the SAE and ISO control patterns

 

[kbplaza]

The SAE controls are they typical backhoe controls as above in the attached picture.



The iso controls above are what most newer excavators come like if they don't have a selector valve to change back and forth.

I have ran backhoe and excavators for years digging utilities but perfer the ISO set up as I had more seat time with it and it is second nature to me. I can dig and run a SAE machine and go back and forth between them through out the day but just don't seem to dig as fast on a SAE machine. So I should only have to move four lines.

 

[Green Acres Homestead]

The SAE controls are they typical backhoe controls as above in the attached picture.



The iso controls above are what most newer excavators come like if they don't have a selector valve to change back and forth.

I have ran backhoe and excavators for years digging utilities but perfer the ISO set up as I had more seat time with it and it is second nature to me. I can dig and run a SAE machine and go back and forth between them through out the day but just don't seem to dig as fast on a SAE machine. So I should only have to move four lines.

Are you sure about these patterns. Using iso the left control runs the stick doesn't it?

 

[Green Acres Homestead]

I want to change my backhoe controls on my BH92 to like the newer excavators. Can that be done on my BH92? If so how do I go about doing this? Thank you guys.

A guy on YouTube demonstrates this pretty good.

 

[ovrszd]

Kbplaza's ISO example is correct. And my preferred pattern.

 

[LD1]

Not sure which is which. SAE vs ISO.....excavator vs backhoe.....Cat vs deere....etc

But I like the right stick being dipper and bucket. Left stick being swing and boom.

Thats how I set my mini (but its easy with a pattern change). But its also how dads backhoe (bota BH77) came from the factory.

My only other "backhoe" experience is 4-stick fords so this really dont apply.

But if no pattern changer valve.....simply swapping hoses. Most are the same size.....but even if not....a few bucks in adapters can make it happen

 

[Paystar]

I did mine. Thought I posted on here? But if not, I apologize for linking another site but I have pics and description here.

My B2620 Pics

www.mytractorforum.com

Now, my backhoe is smaller, but almost all the Kubota backhoes I have seen have the same color coding on these two lines you need to swap.
And as others have said, you need to be careful because some do have flow restrictions in certain circuits, and even my dealer warned me he has seen Deere's bend cylinders doing this, but I have done a bunch of digging with my model and all good so far.

 

[Green Acres Homestead]

Help need to change bh92 backhoe attachment to iso.

lever on driver side connects to a value. It looks like this value connects to two hoses …..one hose connector on top and one hose immediately below it. The same for the lever on the passenger side. Am I correct in saying I can just swap 4 hoses. Take the two from the right lever value and swap with the two that is on the left lever value?

 

[Paystar]

See above link

 

[EarlyAcres]

Hhhhmmm, according to your pictures above my BH90 is set up for/in ISO. I'm guessing that the BH92 is newer.

 

[Green Acres Homestead]

Hhhhmmm, according to your pictures above my BH90 is set up for/in ISO. I'm guessing that the BH92 is newer.

Mine is 2020. Three or 4 years old. ISO the left lever is to run the stick and the right lever runs the boom. Boom being the closer to you.

 

[Green Acres Homestead]

I did mine. Thought I posted on here? But if not, I apologize for linking another site but I have pics and description here.

My B2620 Pics

www.mytractorforum.com

Now, my backhoe is smaller, but almost all the Kubota backhoes I have seen have the same color coding on these two lines you need to swap.
And as others have said, you need to be careful because some do have flow restrictions in certain circuits, and even my dealer warned me he has seen Deere's bend cylinders doing this, but I have done a bunch of digging with my model and all good so far.

I changed only the hosed to iso format. Each value has an overflow and I would think that it would be set about the same but maybe not.

With the iso configuration it seems the boom at times does get the hydro as the stick seems to grab the hydro first. When the stick requirements are satisfied then the boom will kick in. Sometimes when the boom does kick in it can move very quickly. To quickly. I have to be light on the controls. It is workable but not as predictable and power does seem to be evenly spread or instantly. Sometimes the boom is delayed.

 

[Paystar]

I changed only the hosed to iso format. Each value has an overflow and I would think that it would be set about the same but maybe not.

With the iso configuration it seems the boom at times does get the hydro as the stick seems to grab the hydro first. When the stick requirements are satisfied then the boom will kick in. Sometimes when the boom does kick in it can move very quickly. To quickly. I have to be light on the controls. It is workable but not as predictable and power does seem to be evenly spread or instantly. Sometimes the boom is delayed.

Okay, I was lucky with the B2620. It never changed speed or response or power on mine.

 

[Green Acres Homestead]

Help: When using the backhoe, I am now experiencing a loud humming noise like the pump is starving for hydro fluid. I check the level and it is ok but the noise is when extend the stick and boom. I added hydro oil a bit an above the full line on the hydro level stick. This seems to fix or greatly help the noise. I am also experiencing a leak from the pin on the bottom of my tractor. Seems like hydro fluid. I am loosing 1/2 litre per hour. Other factors that changed. The leak started before I changed the plumbing on the backhoe to iso controls instead of backhoe controls. To achieve this I only changed the 4 lines not the block.

I wrote about the leak in another forum. I got great suggestions about the tractor having to put transmission seals in.
Questions I now have:
1. what is causing this noise.
2.Could the noise be caused by changing over to iso controls.
3.Can the leak cause the pump to starve for fluid even if the oil level is fine?
4. The extra cylenders on the backhoe of course need extra oil. Is the hydro reservoir on the tractor ample to supple this extra oil demand that the backhoe cylinders require?