When the speed control pedal is stepped on and in reverse, the variable swash-plate is tilted as shown in figure above. As the pump cylinder block rotates with the input shaft, oil is forced out of pump port B at high pressure. As pressure oil enters motor port D, the pistons, which align with port… Read More »
When the speed control pedal is stepped on and in forward, the variable swash-plate is tilted as shown in figure above. As the pump cylinder block rotates with the input shaft, oil is forced out of pump port A at high pressure. As pressure oil enters motor port C, the pistons, which align with port… Read More »
When the speed control pedal is in neutral, the variable swash-plate is at right angles to the pump piston and they only rotate with cylinder block without reciprocating. Since the oil is not being pumped to the motor, the cylinder block in the motor is stationary and the output shaft does not move.
The pump (2) and motor (5) are joined in a closed hydraulic loop and most of oil circulates within the main oil circuit. When the variable swash-plate is at right angle to the pump piston, the oil is not send to the motor (5). When the variable swash-plate is tilted to forward or reverse, oil… Read More »
The HST of this tractor is a built-in type to the clutch housing. HST assembly is chiefly composed of HST case (clutch housing case), variable displacement piston pump, fixed displacement piston motor, charge pump and various valves. Refer to the next page for detailed parts in HST.
The PTO shift lever (1) to the PTO shift fork (4) are connected by the PTO shift range arm (2) as shown in the figure above. When the PTO shift lever (1) is moved to the A side or the B side, the PTO shift fork (4) is moved by means of the PTO shift… Read More »
PTO is “ENGAGED” or “DISENGAGED” by operating the shift lever of the PTO shifter. The power train from the main gear shaft to PTO shaft is composed as shown in figure above.
The shift lever (1) is connected directly to the shift fork (2). When the shift lever (1) is moved to the “A” side, the shift fork (2) is also moved to the “A” side, then the front wheel drive is “Engaged”. When the shift lever (1) is moved to the “B” side, the front wheel… Read More »
The links from the shift lever (1) to the shift fork (2) and (3) are connected as shown in the above figure. When the shift lever (1) is moved to the left, the shift lever (1) is engaged with the L-R shift fork (2), allowing the operator to change the Low speed or reverse speed.… Read More »
The links are connected from the shift lever (4) to the shift forks (1), (2) as shown in the figure. Each speed from the 1st to 4th can be changed by a single shift lever (5). When the shift lever (5) is moved to the left, the shift lever (5) is engaged with the 1-2… Read More »