Farm Equipment - B oil pan

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B oil pan

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=159419
Printed Date: 17 Jan 2025 at 6:23pm
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Topic: B oil pan

Posted By: 2011dandd
Subject: B oil pan
Date Posted: 28 Mar 2019 at 8:19am

Hey

How on earth do I get this bloody oil pan off?

Replies:

Posted By: Gerald J.
Date Posted: 28 Mar 2019 at 9:07am

Shop and operator's manuals should help:
http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf" rel="nofollow - http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf

http://geraldj.networkiowa.com/Trees/BMilitary.pdf" rel="nofollow - http://geraldj.networkiowa.com/Trees/BMilitary.pdf

Gerald J.

Posted By: Dick L
Date Posted: 28 Mar 2019 at 9:15am

When all the bolts are out turn it corner ways holding it up as you turn it to miss the front pivot bolt head. That will get most. I have had a pan when measured corner to corner is longer than most. On those I loosened the wishbone nut under the torque tube about a half inch or slightly more making sure the nut is not off the threads. I jacked the tractor at that place under the torque tube to just remover the weight from the tires. I loosened the nuts that holds the front to the engine block without removing the nuts. I pried the front forward and the larger pan cleared the pivot nut.

Posted By: 2011dandd
Date Posted: 28 Mar 2019 at 10:58am

I can get it to drop at the front by about 2 inch but I just can’t do the corner to corner twisting without it catching. I really don’t want to have to do anything to the front end. I’ll have another go tomorrow.
I must have spent about an hour trying to wiggle it out with no joy today.
Any more tips or any methods at all that have worked would be great to here.
Thanks Dick

Posted By: 2011dandd
Date Posted: 28 Mar 2019 at 12:45pm

I’m struggling to make sense of the corner to corner also.

Every single bolt is out. It drops on the front on to the front axel pin. I can wobble it and get it about 2 inch out at the front on either side but can’t seen to get past that point

Posted By: BEK
Date Posted: 28 Mar 2019 at 12:52pm

I had to wiggle my pan out from under my B. It's a tight fit between the front end and bell housing. But, it can be done. If I remember correctly, keeping the pan parallel with the engine block, twist it so one the corners slides back into bell housing just below the fly wheel. You should then be able to clear the front end and lower the pan out.

The fun starts when you put it back together. You need to keep the new gasket aligned with all those bolt holes. I used a couple of drops of Permatex between the pan and the gasket. Not as a sealer but more as a little adhesive to hold the new gasket in place as I worked it into position. Almost three years later and no leaks.

Now that you are good at being upside down playing with pans, bolts, oil, and gaskets; time to service those final drives. Good luck!

Posted By: 2011dandd
Date Posted: 28 Mar 2019 at 1:44pm

Thanks BEK

Final drives are on the list

Posted By: Dick L
Date Posted: 28 Mar 2019 at 4:10pm

2011dandd wrote:

I can get it to drop at the front by about 2 inch but I just can’t do the corner to corner twisting without it catching. I really don’t want to have to do anything to the front end. I’ll have another go tomorrow.
I must have spent about an hour trying to wiggle it out with no joy today.
Any more tips or any methods at all that have worked would be great to here.
Thanks Dick

You don't want to drop it down while turning it. It needs to be held up to the block. Like I stated some pans were larger corner to corner.
This is not the best picture but with the camera angle you can not see the bottom pan as you should at that angle.

Posted By: festus51
Date Posted: 28 Mar 2019 at 8:35pm

One trick I learned back in the 60's to keep the gasket in place is to use a small string and loop it thru the holes in gasket and oil pan. Once you get it in place cut and pull strings out one by one

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We the unwilling Led by the unqualified Doing the impossible for the Ungrateful

Posted By: 2011dandd
Date Posted: 29 Mar 2019 at 5:43pm

Thanks for all the help.

I was trying for an age to get that man out. No way was it coming not for me anyway.

So In the end I removed the nose cons and slacked some bolts then slacked the castellated nut of underneath the bell housing which gave me enough plan to eventually get the bugger out