2.  Working condition of reversing gear: gearshifting control mechanism drive 5th reversing gear fork shaft and 

fork to move to right side (rear end of transmission), to make the reversing gear idle wheel and input shaft 
reversing gear and main shaft reversing gear output gear engage. Torque and speed in the same direction of 
output of main shaft and input shaft.   

FE03-2003b

1163

3.  Working status of 1st speed: gearshifting control mechanism drives 1st and 2nd speed    fork shaft and fork to 

move leftward (front end of transmission), which make the 1st and 2

nd

 speed synchronizer and 1st speed  

engaged. Main shaft receives torque from input shaft and reversing torque and rotation speed of output nd 
input shaft through 1st speed.   

FE03-2004b

1164

4.  Working status of 2nd speed : gearshifting control mechanism drives 1st and 2nd speed    fork shaft and fork 

to move leftward (rear end of transmission), which make the 1st and 2nd speed synchronizer and 1st speed   
engaged. Main shaft receives torque from input shaft and reversing torque and rotation speed of output nd 
input shaft through 2nd speed .   

FE03-2005b

1165

5.  3rd speed working status: the shift mechanism toggles the 3rd-4th speed fork shaft and the fork (at the front 

of the gear box) leftwards to engage the 3rd-4th speed syncrhonizer with the 3rd speed gear and the main 
shaft accepts the torque from the input shaft to output the the torque and RPM in the opposite direction of the 
those output by the input shaft.   

FE03-2006b

1166