4 SPEED MODELS
Gilson sold many machines under many different brand names in the United States, Canada and Europe. Companies that bought privately branded models often wanted a certain level of uniqueness to their product. One means of accomplishing this was with the 4 speed control system. The Basic machine is a standard UniTrol however the handle is made to provide 4 forward speeds. The high and low are no different but the buyer got an extra intermediate speed.
The trade-off was that the machine had a separate "clutch" grip on the left handle that needed to be squeezed when shifting. In effect it was no longer a UniTrol in the strict sense of the term.
These 4 speed units were made and sold under a number of brand names including Plymouth, Ford, New Holland, Beaver and Snow Charger.
|
WALK BEHIND TRACTOR
The story behind this unit is one of politics more than engineering. During the 1970s Gilson needed to overcome tariffs in order to be competitive in Canada. One way was to export incomplete units. To accomplish this the UniTrol, which commonly has a one piece chassis was split into two components, a "Walk-behind" tractor and a blower attachment. It was a product configuration used notably by Gravely and Ariens to make year round use of the drive portion of the machine.
These machines can be recognized by the extra bolts, one is shown with the green arrow and the seam in the impeller housing shown with blue arrows.
The nature of this construction requires that the machine halves be separated for replacing the blower belt. The design did not lend itself to seasonal conversion and it existed (to my knowledge) only as a snow-blowing product. The engine is a standard winter engine with no provision for a summertime air cleaner. I have only observed these as Canadian models. They were produced under several model numbers over the years and with 5,8, and 10 HP engines at times. There were 3 and 4 speed versions.
|