PLEASE HELP? BX22 HST problem

[Fytrfire]

Relief valve failure? How could those parts just blow out of the bottom of the hydrostatic transmission? Was the bottom of the trans damaged by riding over a large rock?

"I've priced a new HST from the dealership of $2,100 and $1,000 for labor....no way I'm paying it!"

You might have to, to get your tractor back. Looks to have had a catastrophic failure.

Good question... Don't believe the rock happened but who knows. I'm bery much a do it yourself'er guy and will be repairing it myself. Will definitely post pics as this saga continues....I was hoping somewhere out there had thiers off and could give me the part number off it so that I can get a new one coming for half the price Kubota wants for A new HST.

 

[Fytrfire]

1 spring, kinked in the middle. The HST is very unhappy.

Ya for sure! At least it solves the mystery of why the damn thing wouldn't pull a 1% incline lol.

 

[IH3444]

Depending how the backhoe was used before you purchased it may have stressed the hydrostatic transmission case. You and I both have no idea how this tractor was treated before you purchased it. The used hydro unit that was posted, if you can get a good warranty on it maybe your best most economical way out of this. I also agree with previous posters, don't skimp on the quality of the fluid. Use Kubota ultra full synthetic fluid. Best of luck, and I know you will get this fixed properly.

 

[jthibodeau89]

I was hoping somewhere out there had thiers off and could give me the part number off it so that I can get a new one coming for half the price Kubota wants for A new HST.

The one i posted the screen shot of is 45% of kubota price. 2yr warranty is $100, but i have no idea what it covers.

 

[Shenandoah MF1760]

I hate to mention it, but Hydrogear might make a specific and available only through Kubota HST.

I don't know if this is true, and for your sake I hope not.

But I've been burned too many times to mention by parts that are only sold in mass quantities.

"Sure you can buy some, they come in lots of 10,000. How many lots do you need?"

 

[priberc]

Hi there

I have a 2004 BX22 Kubota that I bought used with 600hrs on it. I was very excited to use it for the first time (and stupid) even after noticing a hydraulic leak from the backhoe hose. After mowing, I got it to the trailer and it did not want to move forward or backwards but you could hear the HST pump wanting to work. I winched it up on the trailer, fixed the hydraulic line and put fresh hydraulic fluid in. I have probably put 30 hours on it since then but I have noticed it does not want to pull even the slightest of hills all that well. A few times I've actually had to pull it out backwards out of the blackberry bushes because the tractor was not seeming to transfer the power from the transmission to the wheels. I have noticed in the mornings it pulls the little hill better probably because of the viscosity of the oil being thicker.

So last week while mowing the grass and going up the lil hill the transmission made a bunch of noises and then started gushing fluid out of the bottom. If you look at the attached pics that's what I saw underneath it.

I believe the leftover pieces are from the pump off the HST? Learning about them since then, I think that is a pump piston as well as the spring that goes inside of it, with a piece of casing lol...

I've priced a new HST from the dealership of $2,100 and $1,000 for labor....no way I'm paying it!

I called Hydrogear who apparently makes the HST for Kubota, but I cannot get a price from them until I get the actual part number that is stamped on the unit and not Kubota's part number of K2561-14002. Hydrogear says there is no way for them to cross reference it...

Does anybody out there know what the actual factory part number of this HST?

Much appreciated!!!

View attachment 719493

 

[priberc]

IMHO it is not your fault that your HST grenaded after running it low on oil once. Most likely it was run low many many times before you got it my friend. The original owner likely got it checked out because it was down on power. Found out the HST was pooched and sold his mistakes/errors on to you. Hard lesson to learn but get some pressure checks done on HST tractors before buying them people. At the end of the day hydraulic pressures in HST tractors are every bit as important as compression in the diesel engine. That said look for used/rebuilt parts. Get them checked out before installing them. Not sure how handy you are with wrenches but the HST unit may be pretty easy to change out. Doing it yourself is worth looking into.....might even be something on youtube to give you an idea what you are getting into. Worth a look anyway. As for new parts....I am not sure what your take is on buying over seas is but I have saved a bundle [up to 70% in one case] getting parts from China. If you are not totally adverse check out Alibaba.com or Made in China.com

 

[CoveredWagon2]

If that is what I think it is....It's gonna cost! It looks like a valve and spring from the HST valve blocks. I had to replace them on my BX24 a few years ago. $350+ each for the valve blocks. My question is How did it get outside the transmission casing? There would have to be a sizable hole in the HST casing to allow that valve to get out!

 

[LD1]

If that is what I think it is....It's gonna cost! It looks like a valve and spring from the HST valve blocks. I had to replace them on my BX24 a few years ago. $350+ each for the valve blocks. My question is How did it get outside the transmission casing? There would have to be a sizable hole in the HST casing to allow that valve to get out!

Still waiting to see pics of how it got out

 

[oldnslo]

In looking at exploded parts diagram a possible place that piston came from is if the motor thrust bearing swash plate assembly disintegrated allowing the piston to come out of the cylinder block and thought the housing. other more unlikely option is if the motor drive shaft broke allowing cylinder block to move sideways and then piston becomes lawn ornament.

Agree will be interesting to see pictures of the casting and internals but suspect a severe depletion of cash for this project.

Other concern is where else did the debris go? Other bearings in transmission case, steering system, back hoe. Hopefully not since those are on a separate pump with filtered inlet.

Best wishes to the OP on getting this repaired and operating again.

With hydraulics cleanliness is a must.