Kubota 7001 (7100) brake axle

[Kurt13]

Hello everyone.
I have a very annoying problem with my 4wd 7001 also known as 7100. For the fourth time I have to replace the brake axle. This time the right side but previously also the left one. I removed the differential pedal because I thought this was the cause (accidiently using it) I use the brakes with great care but still the axle brakes there is definitely something wrong bu no technician is Spain I met so far can help. Any input would be greatly appreciated because it already cost me a fortune on axles..
Many thanks Kurt

 

[torch]

I wonder if we have an English translation issue here, confusing "Brakes" (the shoes and drum mechanism for stopping the axle from turning) with "Breaks" (past tense: "broken", as in shearing or snapping into more than one piece)?

Can you please describe exactly what is failing each time? Pictures would be helpful too.

 

[North Idaho Wolfman]

Hello everyone.
I have a very annoying problem with my 4wd 7001 also known as 7100. For the fourth time I have to replace the brake axle. This time the right side but previously also the left one. I removed the differential pedal because I thought this was the cause (accidiently using it) I use the brakes with great care but still the axle brakes there is definitely something wrong bu no technician is Spain I met so far can help. Any input would be greatly appreciated because it already cost me a fortune on axles..
Many thanks Kurt

Post a picture of the broken axle or parts.

 

[Kurt13]

I wonder if we have an English translation issue here, confusing "Brakes" (the shoes and drum mechanism for stopping the axle from turning) with "Breaks" (past tense: "broken", as in shearing or snapping into more than one piece)?

Can you please describe exactly what is failing each time? Pictures would be helpful too.

Thanks for your reply. Sorry for the language barrier. When touching the pedal of the brakes the mechanism stops the axle connected to the wheels. Inside the wheels I hear a knocking sound when touching the brakes too hard which I avoid. I always try to slow down using the engine. Anyway now and then I have to use the brakes and that's when one of the axle simply breaks. I include a picture of one of the axles that I bought to replace a broken one. Many thanks for looking at my problem.

 

[North Idaho Wolfman]

This is why pic's are always great:
That's not the axle, Axle is in Green on the bottom pic.

I think the reason your breaking that part is a bad bearing or bull gear.
Double check all bearings and gears in yellow and blue for wear or damage.

 

[Kurt13]

Thank you so much Torch!!!! Will do!!

 

[GreensvilleJay]

curious.... is #022 the part that keeps breaking ?

 

[Russell King]

I wonder if we have an English translation issue here, …

Even more confusion

I think that axle in Spanish is “Eje”
That can translate into English as axis, axle or shaft.

So I think to @Kurt13 it may be an axle but to us it would be a shaft….
English says “axle” has wheels attached to it

But @Kurt13 is in Belgium and Spain is all the way on the other side of France. But the tractor technician is in Spain. That is really confusing but not important!

 

[torch]

Thanks for your reply. Sorry for the language barrier. When touching the pedal of the brakes the mechanism stops the axle connected to the wheels. Inside the wheels I hear a knocking sound when touching the brakes too hard which I avoid. I always try to slow down using the engine. Anyway now and then I have to use the brakes and that's when one of the axle simply breaks. I include a picture of one of the axles that I bought to replace a broken one. Many thanks for looking at my problem.

Don't worry about your English, it's much better than my Flemish.

And for the record, it was Wolfman who replied previously. I'm just getting back to you now.

Kubota calls that part the differential gear shaft, but some might translate "shaft" as "axle". There are two, one on each side and they drive the actual axles to which the wheel mount. What damage is being done? Is the gear losing teeth? Or is the shaft parting in the middle? Is the damage the same for each of the four? A picture of the damaged part rather than the replacement would be more educational.

The "knocking sound" could be gear teeth skipping. Is this a hydrostatic drive model or a gear shift model? Are you depressing the clutch when you brake?

 

[North Idaho Wolfman]

Is this a hydrostatic drive model or a gear shift model?

I'm pretty sure that the B7001's were all Gear shift, but he could have an HST B7001 that someone has mislabeled / identified as a B7001, as there was a B7001 Label on the serial number plate of some B7100's.

 

[Kurt13]

Here it is Still love it

 

[Kurt13]

curious.... is #022 the part that keeps breaking ?

Yes it is, 22 in the differential group. In blue. Left and right side both broke twice now.

curious.... is #022 the part that keeps breaking ?

 

[Kurt13]

This is why pic's are always great:
That's not the axle, Axle is in Green on the bottom pic.

I think the reason your breaking that part is a bad bearing or bull gear.
Double check all bearings and gears in yellow and blue for wear or damage.

View attachment 149213

View attachment 149214

Thanks Wolfman!

 

[Kurt13]

Don't worry about your English, it's much better than my Flemish.

And for the record, it was Wolfman who replied previously. I'm just getting back to you now.

Kubota calls that part the differential gear shaft, but some might translate "shaft" as "axle". There are two, one on each side and they drive the actual axles to which the wheel mount. What damage is being done? Is the gear losing teeth? Or is the shaft parting in the middle? Is the damage the same for each of the four? A picture of the damaged part rather than the replacement would be more educational.

The "knocking sound" could be gear teeth skipping. Is this a hydrostatic drive model or a gear shift model? Are you depressing the clutch when you brake?

The axle (eje in Spanish) simply brakes in two. Each time. The knocking sound ik a loud KLAK KLAK not what you would expect from gear teeth skipping.

 

[Kurt13]

Even more confusion

I think that axle in Spanish is “Eje”
That can translate into English as axis, axle or shaft.

So I think to @Kurt13 it may be an axle but to us it would be a shaft….
English says “axle” has wheels attached to it

But @Kurt13 is in Belgium and Spain is all the way on the other side of France. But the tractor technician is in Spain. That is really confusing but not important!

Exactly in spanish it's called "eje"

 

[Kurt13]

I'm pretty sure that the B7001's were all Gear shift, but he could have an HST B7001 that someone has mislabeled / identified as a B7001, as there was a B7001 Label on the serial number plate of some B7100's.

It's a gear shift and yes I am depressing the clutch when braking. All four broke in the same way as in the picture

 

[North Idaho Wolfman]

It's a gear shift and yes I am depressing the clutch when braking. All four broke in the same way as in the picture

Ok the way that is breaking it looks like you have an issue with the brake on that side.
My guess is that the shoes are locking up.

 

[Kurt13]

Ok the way that is breaking it looks like you have an issue with the brake on that side.
My guess is that the shoes are locking up.

That would mean they lock up on both sides which makes sense. Which parts should I check or replace than?

 

[torch]

From the picture, that's a gear drive all right, but for the record my 1994 HST serial number starts "7001".

From the picture, I'd guess that is the left side shaft -- part 21 -- rather than the right side. I'm amazed that it could shear off that shaft so clean before stripping the splines. It looks like it happens right at the machined groove for that circlip?

It would take a lot of torque to twist that steel shaft in two. With the clutch depressed, the force shouldn't be coming from the engine. It's shearing off between the brake assembly and the gear that drives the wheel, so the force must be coming from momentum. I agree with Wolfman, I think it has something to do with the brake assembly. Possibly something shifting sideways and jamming the brake hard. The "Klak-klak" sound under light braking may be the bit that's trying to jam skipping.

I'd disassemble the brake and look carefully for signs of impact and/or side play on anything that rotates.

 

[North Idaho Wolfman]

That would mean they lock up on both sides which makes sense. Which parts should I check or replace than?

Everything in here, but especially the brake shoes and drum.
If the shoes are oily it will actually cause them to grab.