Shifting mechanism component description - GF26.60-P-1000MCC
TRANSMISSION 717.480 /481 /482 /483 in MODEL 451.3 /4
Design
Function
The shift forks are displaced by the selector drums parallel to the transmission shafts. They in turn slide the shift collars on the input shaft or the main shaft towards the respective idler gears.
The actuation of the shift forks is conducted by two independent selector drums, each of which has a groove. The sliding blocks for two shift forks run in each groove:
Selector drum 1/3, 5:
- Sliding block of shift fork for shift collar 1/3
- Sliding block of shift fork, shift collar 5
Selector drum 2/4, R:
- Sliding block of shift fork for shift collar 2/4
- Sliding block of shift fork for sliding gear, reverse gear
The positions of both sliding blocks in the same groove are offset to each other by 120°. If a sliding block shifts a shift fork out of the center position, the other sliding block is located in the straight area of the groove (in the center position of the associated shaft fork).