Farm Equipment - Allis Chalmers 7030 7040 Differences

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Allis Chalmers 7030 7040 Differences

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=173243
Printed Date: 07 Apr 2026 at 4:35am
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Topic: Allis Chalmers 7030 7040 Differences

Posted By: btred1466
Subject: Allis Chalmers 7030 7040 Differences
Date Posted: 31 Jul 2020 at 7:58pm

What were the differences between the Allis Chalmers 7030 and 7040's? 7040's had a Power Shift Transmission option and 5 or 6 more Horsepower and Longer Axles.

What are the other differences other than the Model numbers?

Replies:

Posted By: DrAllis
Date Posted: 31 Jul 2020 at 8:10pm

Power Shift wasn't available until very late 1975, which was a year after the intro of the 7040. Hydraulic outlets were moved to a better location. Power Director transmission actually had 19 speed choices out of 20 selections instead of 15 or so on the 7030. Engine had piston cooling jets, 7030 did not. Rear axle diameter sizes were 3 3/4" instead of 3 5/8". Long axles were available on the 7030, just not many were sold. Warning flashers eventually got moved down off of the rooftop. That's all I can remember.

Posted By: injpumpEd
Date Posted: 01 Aug 2020 at 9:43am

Improved injection pump with more internal timing advance, to allow it to be timed from 24* to 18* for easier starting.

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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!