Abstract: A transmission for a tractor comprises a transmission case having an opening that opens to exterior of the transmission case and a speed change device that is housed in the transmission case. The transmission also includes a cover removably attached to the transmission case for closing the opening of the transmission, a main speed change shift fork supported by the cover and capable of engaging with and moving a main speed change shifter, and a sub speed change shift fork supported by the cover and capable of engaging with and moving a sub speed change shifter. The cover is capable of mounting a creep speed change device having a creep speed position.

Abstract: A working vehicle with a cab is disclosed. The working vehicle comprises a vehicle body for supporting said cab; ground-engaging means for supporting said vehicle body; and a cab frame provided to said cab, said cab frame including right and left front posts, right and left rear posts, and right and left upper frames extending fore and aft between upper end regions of said front posts and upper end regions of said rear posts, respectively; wherein at least part of said cab is curved to bulge outward.

Abstract: A transmission for a tractor comprises a transmission case having an opening that opens to exterior of the transmission case and a speed change device that is housed in the transmission case. The transmission also includes a cover removably attached to the transmission case for closing the opening of the transmission, a main speed change shift fork supported by the cover and capable of engaging with and moving a main speed change shifter, and a sub speed change shift fork supported by the cover and capable of engaging with and moving a sub speed change shifter. The cover is capable of mounting a creep speed change device having a creep speed position.

Abstract: A working vehicle with a cab is disclosed. The working vehicle comprises a vehicle body for supporting said cab; ground-engaging means for supporting said vehicle body; and a cab frame provided to said cab, said cab frame including right and left front posts, right and left rear posts, and right and left upper frames extending fore and aft between upper end regions of said front posts and upper end regions of said rear posts, respectively; wherein at least part of said cab is curved to bulge outward.

Abstract: A clutch operating apparatus having a control valve for controlling pressure oil to connect and disconnect a clutch (7), a clutch pedal (8) supported to be pivotable, a bracket pivotable with the clutch pedal (15), an interlocking mechanism (9) including an interlocking member (24, 25; 51) for operatively interconnecting the bracket and the control valve to operate the control valve with a pivotal movement of the clutch pedal, and a coupling mechanism (100) for coupling the bracket and to one end of the interlocking member. The coupling mechanism (100) includes a connecting pin disposed on one of the bracket and the interlocking member (28), and receiving bores formed in the other of the bracket and the interlocking member (29, 31) for receiving said connecting pin. The receiving bores are in form of slots shaped such that the clutch pedal has a lost motion only in an initial pivotal displacement thereof not to transmit the pivotal displacement to the control valve.

Abstract: A clutch operating apparatus having a control valve for controlling pressure oil to connect and disconnect a clutch (7), a clutch pedal (8) supported to be pivotable, a bracket pivotable with the clutch pedal (15), an interlocking mechanism (9) including an interlocking member (24, 25; 51) for operatively interconnecting the bracket and the control valve to operate the control valve with a pivotal movement of the clutch pedal, and a coupling mechanism (100) for coupling the bracket and to one end of the interlocking member. The coupling mechanism (100) includes a connecting pin disposed on one of the bracket and the interlocking member (28), and receiving bores formed in the other of the bracket and the interlocking member (29, 31) for receiving said connecting pin. The receiving bores are in form of slots shaped such that the clutch pedal has a lost motion only in an initial pivotal displacement thereof not to transmit the pivotal displacement to the control valve.

Abstract: A hydraulic operating apparatus includes a release hub for supporting a release bearing, a piston formed separately from the release hub, and an abutting plate disposed between the piston and release hub as a power transmission relay member for absorbing shocks. The abutting plate may itself be formed of an elastic material or may include an elastic element to suppress shocks transmitted between the piston and release hub. The release hub and piston are formed annular, and the release hub is supported slidable on an outer surface of an outer wall section of a cylinder defining an annular piston chamber. The release hub includes a supporting surface having a smaller diameter than the outer wall section for supporting the release bearing.

Abstract: A movable case for making a steerable wheel steerable is slidably held in an axle case, a tie rod for a steering operation is made telescopically movable, and the movable case and the tie rod are arranged to be locked at an extended or retracted position. At the time of effecting tread adjustment, a steering wheel is rotated to its extreme end, and the vehicle is made to run with the movable case made slidable, which allows the movable case to slide outward through the axle case, permitting tread adjustment to be carried out automatically.