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Inside A Bevel Gearbox

hb112 vickers allis chalmers simplicity bevel gearbox

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5 replies to this topic

#1 New.Canadian.DB.Owner OFFLINE  

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Posted December 12, 2012 - 07:34 PM

I had some spare time today after I got the Gearbox sounding normal, so I thought I would look at the BGB. It had about .100" end play on the output shaft. I installed a shim (.080") between the driven gear (#11) & the bearing (#10). Now it has about .020", which is likely still to much, but it sure isn't .100"!

BGB 1.jpg BGB 2.jpg

It looked simple to open, seeing as the T66X is out & waiting on a seal kit. I did have to remove the hydro reservoir, but that was just 2 bolts.

I thought I'd post some pictures so others can see what they are getting into. It was fairly easy to do. All told, it took about 4 hours.

1. Measure your end play so you know how thick a shim you need.
2. Drain the fluid and remove the back cover (#30) being careful not to tear the gasket (#29).
3. Remove the nut that secures the output pulley (1 1/8" on mine), and then it's key (#13), and then the spacer (#6).
BGB 3.jpg

4. Slide the driven shaft (#3) a couple of inches to the left. You will see a second key (#13) inside the BGB. Remove it and continue sliding the driven shaft out the left side of the BGB.
BGB 4.jpg

5. Remove the driven gear (#11).
6. Install shim.
7. Resemble & fill with 80w90 gear oil. How much oil? Until it stays in the fill tube.
BGB 5.jpg

Better BGB Page 2.jpg
(I'm not sure what is happening to this picture. The file size & quality keeps changing when I save the post. Sorry.)

Here is the new diagram, as MH81 suggested.
Better BGB Page 2 cropped 2.jpg

Edited by New.Canadian.DB.Owner, December 13, 2012 - 10:45 AM.

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#2 bigcountry48 OFFLINE  

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Posted December 12, 2012 - 09:47 PM

Thanks for the tips, I am about to break into the BGB off my B12 and this will sure help!
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#3 Cat385B OFFLINE  

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Posted December 12, 2012 - 10:39 PM

Sticky worthy, me thinks. Nice write up!
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#4 marlboro180 OFFLINE  

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Posted December 12, 2012 - 10:50 PM

I like seeing the guts of a gearbox , thanks!
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#5 Farmlife OFFLINE  


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Posted December 13, 2012 - 05:18 AM

nice, thanks for shareing....
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Posted December 13, 2012 - 05:25 AM

Thanks for the info, looks like it'll keep going for a long time now.

The pic resizing is normal. Software auto resizes by max hgt x max width. If you crop the original image so the parts list isn't in there, it should be more legible after you upload it again.
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Also tagged with one or more of these keywords: hb112, vickers, allis chalmers, simplicity, bevel gearbox