Uni Questions

1. WHen did MM redesign the Uni from the one rear wheel to the two rear wheel?
2. What engine was used in the two rear wheel Uni?
3. When did MM sell the Uni line to New Idea?

Posted by Jeff Strand, Minneapolis on April 24, 2000 at 20:52:19:

In Reply to: Unis posted by Guy Fay on April 24, 2000 at 11:26:21:

I'm certainly not an expert on Uni-Tractors, but according to the Uni-system (p.176-179) section of Norm Swinford's book "The Proud Heritage of Agco Tractors" the redesign of the Uni-Tractor took place in 1960. Swinford writes that at this time the two 5.50 x 16 rear steering wheels replaced the single 7.50x18 rear, and the V4 was replaced with the inline 206-cubic-inch tractor engine. He also states the drive tires/wheels were changed to 13x26 from the former 10x24 size.

Swinford writes that M-M sold the Uni-System to New Idea in late 1963, which continued to offer the product from 1964 until 1991. Swinford writes that the Uni-System was discontinued when Agco acquired White-New Idea in 1991.

Swinford writes that "Engines grew from the 206-cubic inch M-M at 38 horsepower through a long list of OEM engines to a Cummins 505-cubic-inch turbocharged and after-cooled powerhouse with 234 horsepower." He writes that the unit's weight increased from 3,110 pounds to 10,900 pounds. Swinford includes a chart of Uni-Tractor specifications from the M-M Model L in 1951-59 up to the Model 803C in 1985-91.

I love my prairie gold M-M tractors, but let me say as a customer of your Farmall Letter Series Tractor originality guide how helpful that book has been in working on restoring the red breed.