Posted by Janicholson on August 08, 2017 at 10:24:32 from (63.152.244.123):
In Reply to: Low RPM tractors posted by kmvictor on August 08, 2017 at 09:14:58:
A Farmall H or Super H or M or Super M could have a transmission modification that caused the PTO to turn faster than designed. The modifications were called 9 speeds, as they caused the tractor to have 4 additional gear ratios between 4th gear, and direct drive 5th. When in these gears, the PTO operated at 540 with the engine turning much slower (less than 1000). THe real issue here is that those gear ratios are between 7 and 14 mph, which makes PTO work irrelevant. Jim
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