Tractor Testing; Drawbar; Hitch

Jacking tongue on a Massey 55 load tractor lifting an Oliver 88 in the late 1940s. Side view of the jacking tongue at the rear of the Massey-Harris 55 used in tractor tests. The Oliver was also used as a load unit. This type of hitching made it easier to go around the turns at the end of the track because some tractors did not follow (or trail) easily. The platform on the tractor is for exchanging drivers during the test