B7100 HST Hydrostat/Charge pump.

[Mogs84]

Hi all,

If anyone is interested have a search for my other posts, but I've got a HST issue whereby it just stops functioning altogether, mainly at high rpm and then it needs to either have the revs dropped or wait until it decides it'll work again.

Anyway.......

what has everyone else done when the hydrostat or charge pump has gone bad on these?

I'm UK based and parts just don't exist.

Does anyone know what other machines share the same part/parts etc?

Thanks.

 

[Mogs84]

Anyone? Does everyone just strip the machine for parts when they break?

 

[jenkinsr]

Try changing hydro oil and filter. Sounds like your oil is foaming up for some reason.When you stop the air settles out and it works again. perhaps low on oil!

 

[Pau7220]

Air could also be caused by a leak at the large suction rubber hose near the hydraulic pump, or cavitation caused by a blocked suction screen.

 

[Mogs84]

All oils and filters are new, genuine Kubota items.

All pipes have been replaced, all suction screens cleaned.

Oil level is correct, even tried it higher than the correct level to see.

Oil isn't foaming, but it being churned around quite a lot.

Previous owners have clearly used ATF fluid instead of the correct fluids.

So either charge pump or whole HST unit will have issues.

 

[coachgeo]

off topic.... you have an 84 Mog? hmm. 416?

 

[Mogs84]

off topic.... you have an 84 Mog? hmm. 416?

If only!

It's part of my name an year of birth.