Spigot bearing failure

[Lecherou]

Hi guys
This is my first post and I’m located in France.

I have a couple of Kubotas one of which is an old b7001. A great little workhorse which I bought with the house 16 years ago.
it was starting to give me trouble to the point I could not disengage the gears and could only stop by decompressing the engine.
Finally took the plunge and split it apart.
found that the spigot bearing had failed and was chewed up to the point it was jammed up giving direct drive from the crank to the input shaft.
has any body experienced this problem before and what caused it to happen.
all the other components were in good shape.
Does anyone no the kubota part number as I need to order new one.

thanks in advance

 

[GreensvilleJay]

On this side of the pond we call them 'pilot' bearings. It goes in the flywheel to align and support the input shaft of the transmission. Others may know the part number.

here's one website...

Pilot Bushing fits Kubota B4200 B1550 B6100 B5100 B2150 B9200 B2400 B20 B1700 B7100 B2100 B8200 B1750 B7200 66621-14120

Pilot Bushing for Kubota Tractor(s) B1550, B1700, B1750, B2100, B2150, B2400, B4200, B5100, B6100, B7100, B7200, B8200, B9200, Construction & Industrial(s) B20. Replaces Kubota OEM nos 66621-14120, 6662114120.

www.tractorpartsasap.com

They do show the dimensions !

might try googling 'france B7001 pilot bushing'. A 'bearing supply company' might have it, IF the dimensions are 'normal'......

 

[PoTreeBoy]

On this side of the pond we call them 'pilot' bearings. It goes in the flywheel to align and support the input shaft of the transmission. Others may know the part number.

here's one website...

Pilot Bushing fits Kubota B4200 B1550 B6100 B5100 B2150 B9200 B2400 B20 B1700 B7100 B2100 B8200 B1750 B7200 66621-14120

Pilot Bushing for Kubota Tractor(s) B1550, B1700, B1750, B2100, B2150, B2400, B4200, B5100, B6100, B7100, B7200, B8200, B9200, Construction & Industrial(s) B20. Replaces Kubota OEM nos 66621-14120, 6662114120.

www.tractorpartsasap.com

They do show the dimensions !

might try googling 'france B7001 pilot bushing'. A 'bearing supply company' might have it, IF the dimensions are 'normal'......

Looked more like the throw out bearing to me, but what a wreck.

OP, is this a manual transmission or hydrostatic?
Over here, we call the bushing that supports the end of the transmission shaft in the engine crankshaft a pilot bearing.
We call the bearing that presses against the clutch fingers to disengage it a throw out bearing.
Which are you asking about?

 

[Lecherou]

On this side of the pond we call them 'pilot' bearings. It goes in the flywheel to align and support the input shaft of the transmission. Others may know the part number.

here's one website...

Pilot Bushing fits Kubota B4200 B1550 B6100 B5100 B2150 B9200 B2400 B20 B1700 B7100 B2100 B8200 B1750 B7200 66621-14120

Pilot Bushing for Kubota Tractor(s) B1550, B1700, B1750, B2100, B2150, B2400, B4200, B5100, B6100, B7100, B7200, B8200, B9200, Construction & Industrial(s) B20. Replaces Kubota OEM nos 66621-14120, 6662114120.

www.tractorpartsasap.com

They do show the dimensions !

might try googling 'france B7001 pilot bushing'. A 'bearing supply company' might have it, IF the dimensions are 'normal'......

Thanks for that info. I’ll try the ste and see what I get.

 

[GreensvilleJay]

Have to admit, I needed Google to tell me what 'spigot' meant, so I assumed it was a 'pilot' bearing,by the name.
I can't tell what it was,sigh...

 

[PoTreeBoy]

Have to admit, I needed Google to tell me what 'spigot' meant, so I assumed it was a 'pilot' bearing,by the name.
I can't tell what it was,sigh...

lol, he meant the pilot bushing but that looks like too much metal for that. And how would one trash like that, unless the end of the input shaft broke?

 

[Lecherou]

Looked more like the throw out bearing to me, but what a wreck.

OP, is this a manual transmission or hydrostatic?
Over here, we call the bushing that supports the end of the transmission shaft in the engine crankshaft a pilot bearing.
We call the bearing that presses against the clutch fingers to disengage it a throw out bearing.
Which are you asking about?

ok ok. I’m from the old country where we call things by their proper names, not their nicknames .
It’s not the end of the transmission shaft ( as you guys call it) and it’s not from the throw out bearing either.
The damaged parts are paper thin and I picked them out of hole in the crank.
I’m just interested to know what might have caused it.
Question:- should the pilot bushing be assembled dry or oiled into its correct location when I make the reassembly.

 

[Lecherou]

ok ok. I’m from the old country where we call things by their proper names, not their nicknames .
It’s not the end of the transmission shaft ( as you guys call it) and it’s not from the throw out bearing either.
The damaged parts are paper thin and I picked them out of hole in the crank.
I’m just interested to know what might have caused it.
Question:- should the pilot bushing be assembled dry or oiled into its correct location when I make the reassembly.

by the way it’s a manual transmission.

 

[fried1765]

ok ok. I’m from the old country where we call things by their proper names, not their nicknames .
It’s not the end of the transmission shaft ( as you guys call it) and it’s not from the throw out bearing either.
The damaged parts are paper thin and I picked them out of hole in the crank.
I’m just interested to know what might have caused it.
Question:- should the pilot bushing be assembled dry or oiled into its correct location when I make the reassembly.

I submit that the "proper name" of the described "pilot bushing" is actually pilot bearing, since it is a small machined housing, containing a number of small roller bearings.

 

[GreensvilleJay]

Wow, if it WAS a real 'pilot bearing', that explains the huge mess ! I'm wondering if the 'pilot bushing' is the economical replacement ? It's one piece of 'sinterd bronze' and doesn't require any lubrication .
I've never actually seen a 'pilot bearing', only 'bushings'. Be nice to see the WSM or parts page !

This 'might' be it ?? 66621-14120

had to edit my post...something went 'funny', PTB has same number !
It's soooo thin, I can't see the OEM one having needle bearings and a cage.
I'd call it a 'bronze bushing' ( no moving parts).

 

[PoTreeBoy]

I submit that the "proper name" of the described "pilot bushing" is actually pilot bearing, since it is a small machined housing, containing a number of small roller bearings.

I've heard bearing and bushing. In this case, Kubota calls it a bushing, no balls or rollers. This should be what OP needs.

 

[fried1765]

I've heard bearing and bushing. In this case, Kubota calls it a bushing, no balls or rollers. This should be what OP needs.

View attachment 83824

Thank you for the terminology correction.
It is a new one on me.

 

[Pau7220]

Bushing vs bearing… same application.

 

[fried1765]

Bushing vs bearing… same application. View attachment 83857

I do know the difference between a bearing and a bushing, but am VERY surprised to learn that Kubota actually uses a cheap (oilite?) pilot bushing, rather than a more expensive, and better, pilot bearing.

 

[hagrid]

It's a filthy location subjected to occasional blasts of friction material and high temperature.

I'll take the bushing.

 

[fried1765]

It's a filthy location subjected to occasional blasts of friction material and high temperature.

I'll take the bushing.

To each his own.
I think that most cars/trucks/tractors do use a pilot bearing.

 

[arml]

t's a filthy location subjected to occasional blasts of friction material and high temperature.

I'll take the bushing.

I agree, at least a oil bronze bushing won't grenade on you for many moons.

 

[PoTreeBoy]

I agree, at least a oil bronze bushing won't grenade on you for many moons.

I agree, but OP's sure did. Hope his crank bore survived intact.