Throw out bearing

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john2189
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Throw out bearing

Postby john2189 » Sat Jun 06, 2020 8:02 am

Would you reinstall this? Looks like plenty of wear left, but what about the chipped edges?

John
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Re: Throw out bearing

Postby Gary Dotson » Sat Jun 06, 2020 8:09 am

I can't make out the pics. that well but it doesn't look too good, to me.

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Dale Finch
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Re: Throw out bearing

Postby Dale Finch » Sat Jun 06, 2020 8:22 am

Anyone know what the minimum required graphite thickness is? Was thinking that, assuming the fingers are adjusted correctly to stop more damage, perhaps the face of the TOB could be filed flat?
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Re: Throw out bearing

Postby Bill Hudson » Sat Jun 06, 2020 8:41 am

John, I've got one that looks similar. I keep it to show folks one that needs replacement.

Bill
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Re: Throw out bearing

Postby chuck ma » Sat Jun 06, 2020 9:27 am

You have the tractor already split so why not put a new one in for around $30 bucks and save trouble of splitting the tractor again in the near future? When you got it apart is the best time to take care of maintenance items so you don't have open it up again.
Ain't no shame in being early

john2189
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Re: Throw out bearing

Postby john2189 » Sat Jun 06, 2020 10:38 am

chuck ma wrote:You have the tractor already split so why not put a new one in for around $30 bucks and save trouble of splitting the tractor again in the near future? When you got it apart is the best time to take care of maintenance items so you don't have open it up again.


I will put a new one in. Just wanted opinions

Thanks
John
'49 Cub (Vince)
'72 cub (Cecilia)
'41 allis B
'42 Allis B
'71 154 Cub Lo-Boy
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower

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Dale Finch
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Re: Throw out bearing

Postby Dale Finch » Sat Jun 06, 2020 10:55 am

It's recommended to soak it in oil (maybe a few days), and pump the zerk fitting with plenty of cheap grease, including a light smear on the contact face. Most don't come pre-lubricated.
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Re: Throw out bearing

Postby Jim Becker » Sat Jun 06, 2020 12:25 pm

From just the thickness perspective, it doesn't look that bad. If that was the ONLY concern, I would reuse it. However, the other problems are a concern.

The chipped edge is pretty big and a strong warning not to reuse it. But the biggest thing (can be barely seen in the upper picture) looks like there are a couple radial cracks in the graphite. If so, it probably isn't far from falling apart in a catastrophic failure.

john2189
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Re: Throw out bearing

Postby john2189 » Sat Jun 06, 2020 1:51 pm

Jim Becker wrote:From just the thickness perspective, it doesn't look that bad. If that was the ONLY concern, I would reuse it. However, the other problems are a concern.

The chipped edge is pretty big and a strong warning not to reuse it. But the biggest thing (can be barely seen in the upper picture) looks like there are a couple radial cracks in the graphite. If so, it probably isn't far from falling apart in a catastrophic failure.


Good eye Jim. I went to look closer and it is cracked. I didn’t notice it before
'49 Cub (Vince)
'72 cub (Cecilia)
'41 allis B
'42 Allis B
'71 154 Cub Lo-Boy
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower

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Re: Throw out bearing

Postby Glen » Sat Jun 06, 2020 6:55 pm

Hi,
I don't know if you are replacing the pilot bushing, or have read on here before, some of the new replacement pilot bushings are too small an ID after they are driven into the crankshaft hole.
The Cub service manual gives the running clearance, and the size of the end of the clutch shaft. They should be measured with a dial caliper.
If the bushing is too small, it needs reaming before putting the clutch on the flywheel.

Having the bushing too small an ID can make the clutch shaft keep turning when you push the clutch pedal down, then the gears will grind when trying to shift.

Boss Hog has said on here that not all pilot bushings need replacing, some are still good.

Turn the clutch shaft while the Cub is split, and be sure it is straight, not bent.

Check the throwout bearing holder for looseness, or wear, in the mounting holes, and for wear in the holes that hold the throwout bearing.
The holder should hold the bearing in one position, side to side, so it is centered on the fingers.
Replace the holder, and pin at the top of it, if the holes are worn.
TM Tractor has new a holder for Cubs serial number 32229 or above. :)

john2189
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Re: Throw out bearing

Postby john2189 » Sat Jun 06, 2020 7:10 pm

Thanks Glen. I will check all these things when I change it. Right now it’s still working so I will use it until it gets worse
'49 Cub (Vince)
'72 cub (Cecilia)
'41 allis B
'42 Allis B
'71 154 Cub Lo-Boy
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower

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Glen
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Joined: Mon Mar 19, 2012 7:33 pm
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Location: Wa.

Re: Throw out bearing

Postby Glen » Sat Jun 06, 2020 7:30 pm

Hi,
From your pics at the top of the page, I thought you have a Cub apart. :)

john2189
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Re: Throw out bearing

Postby john2189 » Sat Jun 06, 2020 9:57 pm

Glen wrote:Hi,
From your pics at the top of the page, I thought you have a Cub apart. :)


Sorry, that is one on the shelf that I got with other parts. If someone would have said no problem with the chips I’d have put it in
'49 Cub (Vince)
'72 cub (Cecilia)
'41 allis B
'42 Allis B
'71 154 Cub Lo-Boy
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower

Eugene
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Re: Throw out bearing

Postby Eugene » Sun Jun 07, 2020 8:29 am

john2189 wrote:Sorry, that is one on the shelf that I got with other parts. If someone would have said no problem with the chips I’d have put it in
I installed one with minor chips,. The chips were well outside the travel area of the pressure plate fingers.
I have an excuse. CRS.


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