Farm Equipment - 8050 transmission removal

Print Page | Close Window

8050 transmission removal

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=208735
Printed Date: 02 Nov 2025 at 8:44am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 8050 transmission removal

Posted By: youngorange2000
Subject: 8050 transmission removal
Date Posted: 01 Nov 2025 at 3:10pm

It is time to split the 8050 PD I picked up two years ago needing the reverse gear and idler replaced from prior operator error. I have a heavy duty splitting stand for splitting at the flywheel and wheeling the engine out of the way. I will have to find a way to support the cab unfortunately I don't have access to a overhead hoist. Next I will have to remove the the transmission completely I do have a old manual semi transmission jack that should be able to be modified to bolt to the bottom of the tractor transmission. It's going to be a big job but I did a triple split on my 190 this summer for a power director and pto drive gear replacement. Anyone have any experience or advice for splitting the 8050? I do have a good service book that's about 6" thick unfortunately a factory transmission stand is non existent. Thanks.

Replies:

Posted By: Lynn Marshall
Date Posted: 01 Nov 2025 at 4:10pm

I always leave the transmission attached to the engine. Roll that whole assembly away from the rear end and then detach the transmission from the engine.

Posted By: Sids
Date Posted: 01 Nov 2025 at 4:34pm

Yes to the last post. Do the rear split first. Raise and support front of cab, roll the whole works out. Easy to remove transmission then.

Posted By: youngorange2000
Date Posted: 01 Nov 2025 at 5:05pm

What type of stand/cart/jack do you guys use to support the transmission? Thanks

Posted By: DrAllis
Date Posted: 01 Nov 2025 at 5:19pm

The official Allis-Chalmers/OTC front stand was strong enough to handle all that weight. I imagine one would want the front weights left on until the tranny is removed from the engine. I had the OTC stands and I had a home made set. My homemade tranny stand would take the tranny out without having to remove or even touch one line to the hydraulic pumps. I doubt your truck jack would be able to do that.

Posted By: NEVER green
Date Posted: 01 Nov 2025 at 5:29pm

I welded heavy wheels to scaffolding screw jacks, slid heavy pipe over them then welded on flat mounting plates and bracing.

Used it to wheel both engine and tranny out together.

-------------
2-8050 1-7080 6080 D-19 modelE & A 7040 R50

Posted By: Sids
Date Posted: 01 Nov 2025 at 5:51pm

Remove front weights first. Sp1litting stands on engine side frames far to the rear. Use a floor. Jack from the front to help support the transmission when you roll it apart. When you remove transmission from engine remove one 7/8 bolt from each side and put in a long 7/8 bolt with head cut off before you take out other bolts. My splitting stands are simply a 1x4 flat iron, pipe welded to side at bottom end 1 inch all thread and wheel. Easily raised up or down. Then an iron forward to another hole in frame. You can lift and support cab front with a pipe flat plate on top with a hole, all thread with channel or angle on top easy to raise up or down. Make sure range transmission is in park. Put a little jack stand under drawbar at rear, jack and blocks under front of rear main housing.drain oil before split. Not during split, makes a mess.

Posted By: Leon B MO
Date Posted: 01 Nov 2025 at 5:53pm

I have a set of AC cab jacks. They are pretty easy to duplicate. Some 1"pipe and 3/4 all thread would work. Also made a set of splitting jacks, rear end, middle and side that are almost identical to AC's. I did my 7060 pd several years ago. It is a heavy chunk to deal with, respect it until it's in a safe place. Also, a nice tool to have is the bracket to remove clutchpack from trans.

Leon B MO

-------------
Uncle always said "Fill the back of the shovel and the front will take care of itself".

Posted By: SteveM C/IL
Date Posted: 01 Nov 2025 at 10:18pm

My 8070 was already split at flywheel when I decided to go through PD. Don't remember how i held onto PD clutch out or in but that sucker is HEAVY! That's when i found the trashed front bearing behind PD. Ton of metal at suction screen so I decided to replace all brgs so no upcoming failures. Pulled trans with a truck jack and some creative brackets for support. It ain't flat or symetrical anywhere on bottom. Do your due diligence when shimming the bearing behind PD. Do yourself a favor and move wheels out before starting to give room to work. Long story short...I did It ,so can you.