We have several Oliver 1xxx tractors equipped with both shuttle (Reverse-O-Tork) and partial powershift (2 or 3 speed Hydrapower.) They operate like this:
Shuttle: You select any of 6 gears from the main transmission, then step on the pedal for the direction you want to go (FWD or REV). The harder you push the pedal, the faster the tractor goes. To change direction you simply let up the pedal and step on the other one. No braking or clutching is required - in fact there is no clutch pedal.
The shuttle transmission is ideally suited for loader work, snow moving, etc. - any task with frequent changes in direction.
Partial power shift: This is a 2 or 3 speed hydraulically-shifted planetary transmission interposed between the clutch and the main transmission. It can be shifted up/down under full load without clutching.
PPS is useful for heavy field work like plowing. When you encounter a hard spot you can gear down simply by shifting the Hydrapower lever. When thru the hard spot you then smoothly gear back up again without stopping.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
... [Read Article]
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