Abstract: A clutch type change speed apparatus for a working vehicle comprising a first transmission shaft (3) acting as an input shaft, a second transmission shaft (4), a second clutch (8) operatively interconnecting the first transmission shaft (4) and the second transmission shaft (8), a third transmission shaft (6), a fourth transmission shaft (7) acting as an output shaft, a third clutch (9) operatively interconnecting the third shaft (6) and the fourth transmission shaft (7), a first gear mechanism (10) provided between the first transmission shaft (3) and the third transmission shaft (6), a second gear mechanism (11) provided between the second transmission shaft (4) and the third transmission shaft (6), a third gear mechanism (12) provided between the second transmission shaft (4) and the fourth transmission shaft (7), the first to third gear mechanisms (10-12) being the constant mesh type and having different reduction ratios, a first clutch (13) adapted to switch a freely rotatable gear (G1) of the first gear

Abstract: A transmission comprising a main change speed mechanism, an auxiliary change speed mechanism, a rear differential mechanism and a cassette type supplementary change speed mechanism. The supplementary change speed mechanism acts on the transmission through an opening defined in a transmission case housing the transmission. The supplementary change speed mechanism is housed in and supported by a supplementary change speed case which is attached to the transmission case. Transmissions of various specifications may be provided by making various types of supplementary change speed mechanism. The supplementary change speed mechanism is applicable to a propelling transmission line and/or a power takeoff transmission line.

Abstract: A tractor transmission wherein an engine output is transmitted through a clutch mechanism to a primary change speed mechanism, and a clutch housing and a first transmission case are removably connected to each other. The first transmission case includes a space in a forward portion thereof to accommodate a high speed and low speed switching mechanism and a forward and backward switching mechanism, interchangeable with each other, to be attached to a rear wall of the clutch housing.

Abstract: A change-speed apparatus for a tractor for transmitting engine power to running travel apparatuses via a main change-speed mechanism, an auxiliary change-speed mechanism and a forward-and-rearward-travel-shifter mechanism. These mechanisms are arranged in series in fore-and-aft direction of a machine body and a shifter lever for the said forward-and-rearward-travel-shifter mechanism is disposed in juxtaposition to a main change-speed lever for the said main change-speed mechansim.