1956 OC 12

[Robert Barbour]

There is a 1956 OC 12 for sale not far from me. The engine runs good, all the gauges work but the tracks are poor. Does any know if pins and bushings are still made for these?  It also has a winch on it , It is has " Gearmatic Winch Drum 15 " cast on one end of it. Anyone know anything about it?  There is a pedel on the right that is stuck that might be for the winch but I could not see for all the dirt what it was connected too!  Also on the left of the winch was a fitting that looked like a line should be connected too but isn't.

[Robert Barbour]

Well I ended up buying the OC 12---- the start of another major project!! The seller found the manuals for it ; operators, service and parts, that was nice!!  The foot pedel on the right is a brake that operates a disc brake on the pinion shaft. The OC 12 was available with three different steering systems, the standard differential steering,  the Spot Turn system which is the clutch and brake arrangement most other manufacturers use and the Power Turn system which has two planetary drives, one for each track.This Power Turn system provides direct drive to both tracks, at a one to one ratio when not turning and at a deduction ratio to the selected track when turning.  This was new to me as I did not know Oliver had such a system!