Re: difference between the A and 100

Posted by Hugh MacKay on January 12, 2004 at 17:20:27 from (64.228.13.5):

In Reply to: difference between the A and 100 posted by Ron on January 12, 2004 at 16:29:26:

Ron: While the A was one of the predcessors of the 100, there are some differences. The A has a C-113 engine with thermosyphon cooling while the 100 has a C-123 engine with a water pump cooling. The engines however will bolt up to each other. The A was produced from 1939 to 1947, from then until 1954 it became the Super A with hydraulics. In early 1953 the block was changed to acomodate the larger sleeves and pistons used in the C-123 engine. However until late 1954 they used a thicker sleeve and continued to build it as a C-113 engine and still thermosyphon.

The 100 followed in 1954 with some other major changes. Sheet metal was completely changed, brakes were changed, fast hitch became an option, water pump was also added. It had also been installed on the last 1,957 Super A's With the 100 they also started using larger tires. All A's were mag ignition from factory, whereas most Super A's, 100's and the 130 that followed were distributor ignition. The single biggest reason you can't use the A engine on any of the later tractors is there is no place to mount the hydraulic pump on the A block. The block is not drilled for it.

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