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Bevel Gearbox Seal Solution


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#1 justwalt OFFLINE  

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Posted November 06, 2010 - 12:13 PM

Bevel Gearbox Seal Solution

On the AC/Simplicity BGB, the seal butts against the ball bearing.
The shims and side plate hold it all in place.

That seal is unavailable in it's original form, (double cased), and
almost 1/2" thick.

Timken and National makes one that will seal, but is a single case,
and is only 1/4" thick. (Part # 471733) ($6.00)

There must be some sort of substantial spacer behind the seal that
contacts the ball bearing's outter ring to hold it in the bore.

My solution was to carefully tear the old seal apart and reuse the
old seal's inner casing, inserting it into the new seal.

This still is not thick enough, but it will hold the bearing in place
and seal the shaft properly. Additional shims are needed to make up
the necessary thickness, and the side plate holds everything tight.

The pictures shows an aproximate 3/16" slot cut into the old inner case.
This allows the inner case to be compressed to fit inside the new seal.

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Edited by justwalt, November 06, 2010 - 12:22 PM.

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#2 olcowhand ONLINE  

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Posted November 06, 2010 - 12:53 PM

Good work there Walt!:thumbs: I've only owned one Allis with that BGB, and never needed to get into it. I would have guessed tapered bearings. Sometimes in cases like this, when room, I will double stack 2 of the narrower seals, but your way is cheaper!
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#3 Bolens 1000 OFFLINE  

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Posted November 06, 2010 - 05:16 PM

You did a great Job fixing that :thumbs:
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#4 justwalt OFFLINE  

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Posted November 06, 2010 - 06:43 PM

Thanks.... I think double stacking that seal wouldn't be wise...
(no experience with double stacks, except at Wendy's)

The way the bevel gears are arranged, it pushes outward against the seal. I think the single wall seal would eventually fail, but if I had to, I guess I would. That original seal could support a couple hundred pounds, it was very stout.

And, since I didn't have any more shims handy, I took an axle washer and ground it down, (thickness and diameter), (with a little room for expansion), to fit flush with the side plate.
I know the axle washers are available... I'll order a couple Monday.

Edited by justwalt, November 06, 2010 - 06:49 PM.


#5 tractormike OFFLINE  

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Posted November 06, 2010 - 07:59 PM

That's using your head Walt! Good idea.




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