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 Allis Chalmers and Simplicity Garden Tractors
 Simple Attachments (Simplicity & AC) Reference
 990213/990286 Dual Wheel Adapter Kits
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Posted - 03/05/2007 :  18:22:07  Show Profile  Visit B112's Homepage Send B112 a Private Message
This techtip is intended to help collectors make their own or help people fabricate the original B-Series Dual Wheel Kits.

Note: The following Warning, "Dual Wheels must not be used for digging purposes or over rough ground where the load is concentrated on the outer wheels" can be found in the B-Series Tractor and Attachments Service Manual on page Q-7. This point has been reenforced by many collectors either knowing of or experiencing broken hubs or axles. Extremely wide dual wheels are not recommended for the B-Series tractors.

The manual on the 990213 and 990286 dual kits:

Below are some pictures, measurements and notes I made on the Dual Wheel Adapters. These are original adapters, a friend had, I quickly snapped pictures and then he sold them.

Dual adapter height w/adapter studs:

Dual adapter height (alone):

Notes about the dual wheel adapters:

The notes indicate that there were six holes on the side which had threads, with only five of these being threaded. The other side had five 1/2" holes. I was not sure of the thickness of the steel, something between 1/4" and 3/16" of an inch (aka the 1/4" > Y > 3/16"). The key dimension is that these had a space of 6-1/2" from each flange. Otherwise, the pointers showing where the weld was and the width of the flange was 5-1/2". The term "spacers" should be refered as "adapter studs" and these were 1-1/4" long with threads on both sides; including the threads they were 2-3/4" long. Hope this helps anyone looking to make these.

Here's the thread side:

Here's the welded side (note that the weld is raised slightly):

Close up of the adapter stud (circled in blue):

Adapter Studs:

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Highly recommend you visit this link. This vendor makes two size dual wheel adapters. Makes custom sizes. Definitely worth a look and a good price.

This link is for another Dual Wheel Adapter fabricator.
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