1. Probably in the late 50's early-mid 60's. 12V is not necessary on that small engine. 2. I believe from the start of SA production. 3. No 4. No 5. Heavy duty front axle, foot accelerator, no real advantages unless you beat it to death. 6. HP increased slightly with each model, PTO HP from about 18 for the A to 23 for the 140. Overhaul kits are available to increase cu in from 113 to 123 cid in the A and early Super A to 132 in the late Super A-up. 7. Don't know, if you don't like the 140 styling buy an earlier model.
The main difference is that the A did not have hydraulics. 100-up was available with single point fast hitch. The condition of the tractor means more than the slight differences.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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