B7100 Rear Wheels Falling Off

[ojaikubota]

Our B7100 has had both rear wheels fall off about 4 times over the past 2-3 years. The factory part that holds the wheel on the axle is a brass(?) pin with a small spring clip on the end. I reverted to this recently and it lasted about 2 months. Previously I have been going with long bolts and two nuts and they break. Has anyone else seen this? Is the problem that the hub on the wheel is worn? What to replace?
Thanks!

 

[leonz]

Our B7100 has had both rear wheels fall off about 4 times over the past 2-3 years. The factory part that holds the wheel on the axle is a brass(?) pin with a small spring clip on the end. I reverted to this recently and it lasted about 2 months. Previously I have been going with long bolts and two nuts and they break. Has anyone else seen this? Is the problem that the hub on the wheel is worn? What to replace?
Thanks!

Whoopsie:confused2:

Am I correct in assuming you have no wheel clamps, lug nuts or wheel bolts which hold the rim to the axle hub?

Our old boss buggies had four bolt hubs and they were a 2 by 4 kubota converted for underground mine use.


If you are using the wrong grade bolts and not torqueing them in the sequence needed with a torque wrench and not using blue Loctite...........

The center of the wheel should fit over the guide edge of the hub and then the wheel bolts are torqued to spec.

Unless I am missing something as the largest Kubota I worked on was a 40 horse in 1982 with 5 wheel bolts and it have wheel bolts which secured the dished wheel to the hub mount.


I am unsure if the were importing the entire tractor then or not but I believe they were.

Maybe Neil or Art can help with this quickly but your in initial description is something I have never dealt with the kubotas I worked with unless you have adjustable wheels to widen and narrow thew tread width and the dish and wheel are both damaged which sounds like what has happened and they must be replaced.

If your wheels have replaceable dishes you should replace them if possible or buy new complete wheels; something is wrong with your description as it sounds as if the wheel and replaceable dishes are both bad on both wheels and need to be replaced. please buy a torque wrench and blue loctitie and you will not longer have this issue.

 

[Egon]

There is a new style hub for the B7100 axles. They work very well.:thumbsup::thumbsup:

I had the same problems. My wheels would tend to go to the inside rather than out and off. I tried shims but they worked out. Finally resorted to putting "Duct Tape" over the inside bolt so the broken pieces would stay in place and stop the tire from moving inward. Finally put the new hubs on and no problems there after.

 

[KubotaSam]

Like Egon said, get the new style wheel hubs. I replaced mine 2 or 3 years ago and all problems have stopped. It cost around $300.00 for both sides from Kubota to do the job. I recently say the same hubs on Ebay for around $100.00 each.

 

[leonz]

There is a new style hub for the B7100 axles. They work very well.:thumbsup::thumbsup:

I had the same problems. My wheels would tend to go to the inside rather than out and off. I tried shims but they worked out. Finally resorted to putting "Duct Tape" over the inside bolt so the broken pieces would stay in place and stop the tire from moving inward. Finally put the new hubs on and no problems there after.

Thats one sexy looking wheel hub there Egon; Was the adventure worth looking at the stub shafts and how was thier overall condition?

 

[Egon]

Oh yes. The stubs were in good shape. The original hubs were a poor design.

The duct tape worked!:thumbsup: sort of.

 

[Iowachild]

Oh yes. The stubs were in good shape. The original hubs were a poor design.

The duct tape worked!:thumbsup: sort of.

I am nominating this as the "under-statement of the year"! :laughing: I mean for goodness sakes you had to hold em together with duct tape!!:shocked:

 

[Johndeere3720]

Oh yes. The stubs were in good shape. The original hubs were a poor design.

The duct tape worked!:thumbsup: sort of.

all right! if all else fails, use duct tape! :thumbsup:

 

[KubotaSam]

Here is the link to the ebay hubs.
New Kubota Rear Hub B6200 B7100 B7200 B7300~H6640-17300 - eBay (item 380233480162 end time Sep-10-10 22:21:38 PDT)

 

[leonz]

The excellence of duct tape in the above application is duly noted, and Red Green will be notified of the success of the current application.

The Duct Tape Council will also be notified of the projects success via National Public Radio and its home page and the chair duck (who is a Mallard this month) can remove it from his bill.



:thumbsup:

 

[B2400]

I found that cutting the spring that was under the tension bolt and tightening to 110lb/ft ended my problems with the loose hub. The spring was bottoming out and not allowing the tension bolt to apply full pressure to axle.

 

[CBW1999]

Red Green would certainly be proud:thumbsup:

"Duct Tape: The Handy Man's best friend"

 

[texasjohn]

Egon, I can only say:

MOM's with duct tape rule

 

[Bluelick]

I found that cutting the spring that was under the tension bolt and tightening to 110lb/ft ended my problems with the loose hub. The spring was bottoming out and not allowing the tension bolt to apply full pressure to axle.

I'd like to know more about this alternative to replacing the hubs. Has anyone else tried this? Can the spring be removed or does it have to be cut off? What is the purpose of the spring?

How about hardened bolts for the locating pins? I assume that the originals were softer material so they would not damage the axle if the wheel gets loose.

I have duct tape, I also have a torque wrench. In general, I prefer to use the torque wrench when possible for long-term results!

Thanks!

 

[Egon]

My results using better quality bolts and cutting the spring were not successfully.

Perhaps some thicker shims tacked to the hub would work.

 

[Bluelick]

I'm thinking that a shim that wrapped the axle with holes where the bolts go would keep the shim in place, but I have not gotten a really good look at it yet, and won't be doing that until after my daughter's wedding which is a week from this Sunday!

 

[Danno1]

My results using better quality bolts and cutting the spring were not successfully.

.

Maybe shoulder bolts would've worked???


,

 

[Egon]

The new hubs worked!:thumbsup::thumbsup:

 

[Bluelick]

Last weekend I cut shims from some steel flashing I had and put them in. I cut them about 3/4" longer than the mating surface so I could bend up the ends at the inside and outside edgoe of the hub to hold them in place. This took about 80-90% of the slop out, but it still doesn't feel like the bolts are tightening up completely. I'll let you all know about the results.

 

[Egon]

Last weekend I cut shims from some steel flashing I had and put them in. I cut them about 3/4" longer than the mating surface so I could bend up the ends at the inside and outside edgoe of the hub to hold them in place. This took about 80-90% of the slop out, but it still doesn't feel like the bolts are tightening up completely. I'll let you all know about the results.

I tried that using 3/4 in bandsaw blade. Didn't work for me.