B7100hst, replacement brake shoes too big?

[protex28]

Hello, I’m in the process of rebuilding the break system on my b7100hst. I ordered new shoes from Madison tractor. Double and triple checked the part number before I bought it cause it was so expensive. They just arrived and don’t fit in the drum. I’m wondering what my options are. I noticed other people complaining that these pads are “generic” pads that “fit” and long list of tractors and a few people mentioned grinding them down. Not sure I want to do that, but I also don’t want to pay for return shipping/get brakes from somewhere else just to have the same problem. Any ideas?

Edit:
Tractor serial: 10471
Original Shoe SKU from parts book: 66611-88800, according to kubota, this was replaced by 66905-22390
SKU I ordered: 66905-22390

 

[North Idaho Wolfman]

What part numbers did you order?
And what is the serial number of you're B7100HST?

 

[protex28]

What part numbers did you order?
And what is the serial number of you're B7100HST?

Updated the original post with the information. Thanks for the quick response.

 

[85Hokie]

Hello, I’m in the process of rebuilding the break system on my b7100hst. I ordered new shoes from Madison tractor. Double and triple checked the part number before I bought it cause it was so expensive. They just arrived and don’t fit in the drum. I’m wondering what my options are. I noticed other people complaining that these pads are “generic” pads that “fit” and long list of tractors and a few people mentioned grinding them down. Not sure I want to do that, but I also don’t want to pay for return shipping/get brakes from somewhere else just to have the same problem. Any ideas?

Edit:
Tractor serial: 10471
Original Shoe SKU from parts book: 66611-88800, according to kubota, this was replaced by 66905-22390
SKU I ordered: 66905-22390

So this is a 1980 B7100? I take it based on serial - the serial number on the sticker and/or the one at clutch pedal?

Can you take a couple of pictures of the serial number and or tractor?

 

[North Idaho Wolfman]

Updated the original post with the information. Thanks for the quick response.

Sounds like you got all the right parts.
How much are they off?

 

[protex28]

Sounds like you got all the right parts.
How much are they off?

The two drums are slightly different sizes due to wear. On one, it juuuuust barely slides in and would definitely be rubbing. Probably would take care of itself pretty quickly, though. The other one does have a bit of crud built up on it that I could clean off (pads were rusted stuck in an engaged position for a long time), but even then I don't think I could get it all the way in there without taking a little bit off. We're talking millimeters here, though.

 

[protex28]

So this is a 1980 B7100? I take it based on serial - the serial number on the sticker and/or the one at clutch pedal?

Can you take a couple of pictures of the serial number and or tractor?

I think I've posted enough to add attachments? We'll see...

Don't have great pictures of the whole thing. Took most of these 'cause I was trying to figure out what loader was on there and it's too dark to take a better one at the moment.

 

[85Hokie]

Perfect photos - oldie but goodie!

 

[North Idaho Wolfman]

If it were mine I would surface the drums and clean all the part up, then see how the fit is.
If they are still too big, then I would surface them down.

 

[protex28]

How would you recommend surfacing the drums? I don’t have much in the way of equipment.

 

[North Idaho Wolfman]

How would you recommend surfacing the drums? I don’t have much in the way of equipment.

Know a friend with a lathe?
Or a local machine shop.

 

[TheOldHokie]

Here ar

Hello, I’m in the process of rebuilding the break system on my b7100hst. I ordered new shoes from Madison tractor. Double and triple checked the part number before I bought it cause it was so expensive. They just arrived and don’t fit in the drum. I’m wondering what my options are. I noticed other people complaining that these pads are “generic” pads that “fit” and long list of tractors and a few people mentioned grinding them down. Not sure I want to do that, but I also don’t want to pay for return shipping/get brakes from somewhere else just to have the same problem. Any ideas?

Edit:
Tractor serial: 10471
Original Shoe SKU from parts book: 66611-88800, according to kubota, this was replaced by 66905-22390
SKU I ordered: 66905-22390

Here are some pictures of the aftermarket (A&I) drums and shoes I bought several years ago for my B7200. I have not tried to install them on the tractor but the shoes easily fit inside the drums when on the bench. I think the B7100 uses the same part numbers.

So how do mine compare to what you have? If your problem is a small amount of iinterference between the lining and the drums I would not hesitate to grind the ends of the shoes down where they contact the actuator and anchor.

Dan

 

[protex28]

Here ar

Here are some pictures of the aftermarket (A&I) drums and shoes I bought several years ago for my B7200. I have not tried to install them on the tractor but the shoes easily fit inside the drums when on the bench. I think the B7100 uses the same part numbers.

So how do mine compare to what you have? If your problem is a small amount of iinterference between the lining and the drums I would not hesitate to grind the contact points down on the ends of the shoes where they contact the adjuster and anchor.

Dan

View attachment 124093

View attachment 124095

Aaaah, thanks for that suggestion. The brakes probably would fit like that without the actuating parts on the cover panel, but once I put the springs on and attach the breaks to the plate, it no longer fits, but by a small margin. Hadn't thought of grinding down that point, but that makes sense. It probably wouldn't need much. I probably have the tools to sand that point down a bit.

Now I just need to figure out how to clean up the drums properly.

 

[TheOldHokie]

Aaaah, thanks for that suggestion. The brakes probably would fit like that without the actuating parts on the cover panel, but once I put the springs on and attach the breaks to the plate, it no longer fits, but by a small margin. Hadn't thought of grinding down that point, but that makes sense. It probably wouldn't need much. I probably have the tools to sand that point down a bit.

Now I just need to figure out how to clean up the drums properly.

See - just got to use your noggin. I would suggest you hit the drums with a flap wheel. Even aftermarket the things are like $90 each.

Dan

 

[Lil Foot]

20+ years ago the spindle brake went out on my mill.
As parts were no longer available, I turned the drum to clean up, & I took the shoes to an industrial brake & clutch house.
They ground off the remnants of the old shoe material & bonded new, thicker linings.
They asked me for the drum, and then radius ground the new linings for a perfect fit.
They are still in use.
A friend used the same service when restoring a 6 wheel amphibious ATV.

Another friend bought brake linings for something (can't remember what) that were a little too large, and we ground them down by hand with a belt sander.

 

[SDT]

If it were mine I would surface the drums and clean all the part up, then see how the fit is.
If they are still too big, then I would surface them down.

Finding a shop with a brake drum grinder is just about impossible these days and finding a brake drum lathe that will accommodate such a small drum may well be problematic.

Finding a shop with a brake shoe cam grinder suitable for grinding the shoes will likely be even more difficult.

Can't imagine why new Kubota shoes do not fit. Aftermarket shoes?

 

[SDT]

Aaaah, thanks for that suggestion. The brakes probably would fit like that without the actuating parts on the cover panel, but once I put the springs on and attach the breaks to the plate, it no longer fits, but by a small margin. Hadn't thought of grinding down that point, but that makes sense. It probably wouldn't need much. I probably have the tools to sand that point down a bit.

Now I just need to figure out how to clean up the drums properly.

If the old shoes have not been run inside the new drums metal to metal, badly scoring the drums, you can clean up the drums with course sandpaper. This not a F1 race car.

 

[protex28]

Yeah, I'm going to try this since it's relatively cheap. If that doesn't work, I'll just use sandpaper and try to get it as good as I can.

 

[SDT]

Yeah, I'm going to try this since it's relatively cheap. If that doesn't work, I'll just use sandpaper and try to get it as good as I can.

I would save my $17.50 and just use sandpaper.

 

[TheOldHokie]

If the old shoes have not been run inside the new drums metal to metal, badly scoring the drums, you can clean up the drums with course sandpaper. This not a F1 race car.

That was hard - took about 5 minutes to midify that old arbor I had laying around. Could have got there faster if I bothered to measure thw spline. Cutting the drum probably another 5 minutes each.

Bring me your tired, scored and out of round masses.

Dan