B7100d u joints.

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Oregon Kiwi

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I purchased some replacement u joints and it seems they are 1/16- 1/32 to small any idea if I got the wrong ones the part number is 66591 56320. Pretty bummed as they were 50$ a peice. Pretty sure the caps need to be snug but I could be wrong any advice would be great.

Cheers
Chris reinhard
 

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Russell King

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Is there a snap ring groove in the yoke?


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Russell King

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You probably have the correct parts but you should measure the old cap diameter and the new ones.
This site shows most dimensions of the joints.
http://spicerparts.com/resources/measuring-u-joints

Your PTO shaft may have been changed and not be the Kubota brand.

NAPA Auto Parts was very helpful getting the correct u joint by measuring the old one


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North Idaho Wolfman

North Idaho Wolfman

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Which joints are you working on?
Feed from the transmission to the front?
Or is it the joint inside the front axle?
 
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boz1989

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How did you remove them? I know a guy that just beat on one side of the cap instead of evenly on the whole cap. In doing so, he stretched it, and a new u joint would just fall out.

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Oregon Kiwi

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boz1989 said:
How did you remove them? I know a guy that just beat on one side of the cap instead of evenly on the whole cap. In doing so, he stretched it, and a new u joint would just fall out.

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I used a socket to press them out then channel locks to pull them the rest of the way out.
 
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Oregon Kiwi

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Russell King said:
You probably have the correct parts but you should measure the old cap diameter and the new ones.
This site shows most dimensions of the joints.
http://spicerparts.com/resources/measuring-u-joints

Your PTO shaft may have been changed and not be the Kubota brand.

Thanks I will look at this tonight. It's not a pro shaft but the drive shaft from trans to front axel.

NAPA Auto Parts was very helpful getting the correct u joint by measuring the old one


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Thanks I'll look at that tonight.
It's not a pro joint it's the joint on the driveshaft the goes from trans to front axel.
 
North Idaho Wolfman

North Idaho Wolfman

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Where are you getting your parts from?
I noticed in your other thread that the parts were bagged in zip lock bags and not factory sealed bags.
My point is, if they are not in factory sealed bags, it's possible that someone has bagged the wrong crosses.
And just as a note: all models of B7100 took the same crosses.
 
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Oregon Kiwi

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Messick website.
The u joints are in sealed kubota packaging.
The inside diameter on the yokes I'm working on are .808"

Could the yokes have been changed maybe like Russell king had said?

I'll take a pic of the packing when I get home tonight.

Thanks
 
North Idaho Wolfman

North Idaho Wolfman

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It would be rather odd for the yokes to have been changed, but stranger things have happened. ;)
 
North Idaho Wolfman

North Idaho Wolfman

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Yes those are OEM packages.

Are both sides (bearing cups) of the cross the same dimensions?

You haven't opened the second package right?
But can you either mic it or just hold the other up to compare the 2 new part sizes.

Kubota parts are almost always right on the money as far as size and fit goes, so this is an odd one.
 
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Oregon Kiwi

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I went ahead and removed the front axel u joint. The replacement one was a perfect fit. So looks like I'll have to return the unopened one and find a fit for the different sized yoke. Hopefully the local napa might stock somthing.

I'm starting to think many hands have messed with this old tractor lol.
 

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Russell King

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L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Jun 17, 2012
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Can you just replace the whole yoke and u-joint with new dealer parts? May be too expensive or may be the easiest way...


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Oregon Kiwi

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Thought I would share I have been looking for a replacement for a week now not getting anywhere none of the local auto parts stores were helpful. Until I realised duh kubota is Japanese which means it's all metric.

So within 5 min on the web I found a replacement from only one website
http://www.theujointstore.com/tuskoy1.html

It's in the mail I'll update if it works considering it measures the same.

Cheers
Kiwi
 
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