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706b engine transplant

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=207879
Printed Date: 22 Aug 2025 at 2:36am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com


Topic: 706b engine transplant
Posted By: 8070nc
Subject: 706b engine transplant
Date Posted: 20 Aug 2025 at 6:06pm
I recently purchased a 706b forklift. It runs and has enough power but it has so much blowby it pushing oil out the dipstick tube. Its my understanding the later models had a 433 allis engine. Mine has a perkins. My question is if a 433 could be transplanted into it and what it would entail
Thanks in advance

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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor



Replies:
Posted By: Kcgrain
Date Posted: 21 Aug 2025 at 11:27am
I just bought a 706B that was repowered from the Perkins gas to a 4bt Cummins, I would have preferred the 433T but the price was right and it was close by.
Doesn't look like it was a lot of work, but be careful you get the engine mounts exact, because whoever did this conversion didn't have it exact and it broke every engine mount in the frame


Posted By: 8070nc
Date Posted: 21 Aug 2025 at 5:20pm
Thanks for the reply. Im mostly concerned about the adapter plate for the bell housing. I think i can get by with this engine. Its git a skip on one cylinder and it will fire on that cylinder every once in a while. The cause is an injector leaking compression. I didnt catch the sound of the injector because the exhaust manifold is broke. When i fix the injector i think it will run fine. I slowed down the oil blowing out with some lucas oil stabilizer

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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor



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