Abstract: A tractor includes a body frame (4), front wheels (3), propelling shafts (8) disposed in a rear portion of the body frame, and semicrawler units (10) for receiving drive from the propelling drive shafts. Each semicrawler unit includes a drive rolling element (11) attachable to one of the propelling drive shafts, an endless crawler track (15) driven by the drive rolling element and contacting the ground, driven rolling elements (13, 14) engaged by the endless crawler track, and a track frame (12) for supporting the driven rolling elements. The track frame is supported by the body frame to be vertically oscillatable through a pivot shaft (16). Rear wheels (9) may be attached in place of the semicrawler units to the propelling drive shafts.

Abstract: The disclosed invention provides a tractor cabin and a manufacturing method therefor. A main transparent plate and side transparent plates are caused to adhere to one another or otherwise become an integral whole, by a substantially transparent filling material, to constitute a gate-shaped front face of the cabin.

Abstract: A tractor cabin having a pair of right and left front struts, a pair of right and left rear struts, a pair of right and left intermediate struts disposed between the front and rear struts, a top frame interconnecting upper ends of the front, rear and intermediate struts, a floor sheet attached to lower ends of the front, rear and intermediate struts, and a gate-shaped cabin front defined by the front struts and the top frame. The cabin comprises a gate-shaped partition assembly disposed at a lower mid-position transversely of the cabin front, connecting members connecting right and left lower ends of the partition assembly to lower ends of the right and left front struts, and a transparent member secured to inner peripheries of the cabin front, the transparent member including side transparent portions extending downwardly therefrom.