Rebuilding a hydraulic pump on a M6800?

[Gus1957]

Kubota #3A111-82204 HYD.PUMP

HYD.PUMP

messicks.com

Planning ahead.

Can anyone recommend a shop on where to send a pump to thinking it'll be cheaper than the $2K for a new one?

I live in upstate NY but this could be easily shipped.

Thanks -- Gus

 

[TheOldHokie]

Kubota #3A111-82204 HYD.PUMP

HYD.PUMP

messicks.com

Planning ahead.

Can anyone recommend a shop on where to send a pump to thinking it'll be cheaper than the $2K for a new one?

I live in upstate NY but this could be easily shipped.

Thanks -- Gus

When gear pumps wear out they are not generally rebuildable. How have you determined yours needs rebuilding/replacement?

Dan

 

[Gus1957]

Planning ahead for options based on age and use. Lift cylinders are seeming weaker.

 

[TheOldHokie]

Planning ahead for options based on age and use. Lift cylinders are seeming fweaker.

Well dont plan on rebuilding the pump.

Dan

 

[Mark_BX25D]

When gear pumps wear out they are not generally rebuildable.

I don't know enough about the question to have an opinion, but that statement intrigued me. So I did what we do these days - I did a search and read a bunch of information.

I found companies offering rebuilds, so apparently it CAN be done (at least on some pumps). I also found a bunch of info that said basically, "Yes, it can be done, but it's not worth the time or hassle. You don't get much out of it." Interestingly, I did not find any rebuttal to that viewpoint.

One of the most interesting bits of information came from a company that rebuilds them. This company that clearly profits from rebuilding pumps, basically said it's going to cost you about half the price of a new one, and will get you about half the life of a new one.

The only advantage they offered over buying new OEM was they promised less downtime, because apparently getting the OEM can take quite a while.

I think if I were a large commercial operator I could afford to keep one or two on hand to avoid that downtime.

 

[TheOldHokie]

I don't know enough about the question to have an opinion, but that statement intrigued me. So I did what we do these days - I did a search and read a bunch of information.

I found companies offering rebuilds, so apparently it CAN be done (at least on some pumps). I also found a bunch of info that said basically, "Yes, it can be done, but it's not worth the time or hassle. You don't get much out of it." Interestingly, I did not find any rebuttal to that viewpoint.

One of the most interesting bits of information came from a company that rebuilds them. This company that clearly profits from rebuilding pumps, basically said it's going to cost you about half the price of a new one, and will get you about half the life of a new one.

The only advantage they offered over buying new OEM was they promised less downtime, because apparently getting the OEM can take quite a while.

I think if I were a large commercial operator I could afford to keep one or two on hand to avoid that downtime.

A lot depends on the pump. Some pumps are designed to be rebuildable and others are not. Rebuildable pumps typically have some form of sacrificial wear plates that can be easily replaced

In the case of this pump the only parts available are the seals and there are no wear plates although the bushings may perform that function. The major wear components that are the source of widened ckearances and lost pressure ,(slip) are not available. That would be items A-H in this parts diagram. Some or all of them would have to be made from scratch. Thats expensive.

Aluminum body gear pumps are cheap to make and new aftermarket pumps are availsble for under $300. Kubota's markup is insane.

Dan

 

[North Idaho Wolfman]

Planning ahead for options based on age and use. Lift cylinders are seeming weaker.

There are several reasons the "lift Cylinders can seem weaker":
Clogged suction side of pump.
Mal adjusted / damaged pressure relief valve.
Bad / damaged quick disconnects.
Bad seals in one or both lift cylinders.
Bad spool valve.
Bad / mal adjusted loader control linkage.

Before just throwing parts at it, do some serious tests.