add oil to final drive on a 1941 B

Thanks in advance for your help
I have 41 B and my question is how do you add oil to the final drives
I changed the transmittion / PTO fluid, and wanted to change the final drive oil
Not sure where it goes in at or for that matter where it is? IF any body had a photo that would be great, Jeff

The final drive pans have a fill hole, but not drain hole...crazy enough.

Refill with about 85W gear lube. George

You can add drains to the pans, it was done at times.  Here is a link.

http://www.worldpath.net/~thompson/acb/final%20drives/pan.htm

Very good informational website. 

I wonder if it would be wise to find/seek out peoples web pages like this and host them on the allis chalmers forum.  Over time people forget or the webhost shuts down and information is lost.  If we could store them here(with their permission/blessing) it could remain a library of information for years to come?  A good moderator could sort/approve of pages do ensure high quality information that applies just to AC and is not repetitive, IE no Here is my tractor type pages, but pages that truly have good knowledge like this fellows pages do? 

What do you guys think? 


Edited by firebrick43 - 28 Aug 2010 at 9:54am

Bee wrote: Was thinking a bottom drain would be another item to get sheared off if ya hit something hard.  Must be some reason for not having the factory design them in.

Anything is possible, I guess if you regularly drive over stumps and boulders you might not want to do it.  However at least on my CA, if the wheels are not spread way out they are very well protected by the wheel.  I have a hard time seeing it happen with how I use my tractor. 

Don't assume the factory has your best interest or those of the mechanic in mind.  Allis did a lot of things that were in their interest of selling a price point competitive tractor and additional manufacturing steps such as adding a drain could save a few dollars per tractor as it is several different steps to install one.  Say they saved even just 2 dollars(I figure that to be resonable for the time period) .  Over the course of selling 50,000 tractors that adds up to 100,000 dollars, a lot of money in the 1950's.  Another cost  saving point that wasn't in your best interest was the lack of a true regulator on the generator or a pressurized radiator(at least until 1954/55?). The allis light switch/generator cutout was not the best system available at the time, especially since others had switched to regulators by then. 

The flip point is that they are not absolutely necessary.  You can drop the pan and replace the gaskets, or suction it out(I am never thrilled about this solution as you cant remove sludge).  Just how much does that cost?  I recall around 8-10 dollars for each gasket and an hour time. 

You know,  We had that problem when I sold them but it was not that imortant.  In fact, we had suction guns that drew the oil out and we replaced it.