Input and output shafts
The input shaft
is mounted in a bearing assembly in the gearbox housing together with a cylindrical roller bearing in the clutch housing (loose bearing) and with a grooved ball bearing (fixed bearing).
For mass reduction, the input shaft has a deep bore.
The 1st, 2nd and reverse gear wheels are connected positively to the input shaft.
The 3rd, 4th and 5th gear wheels are loose and run in needle bearings.
The synchromesh body of 3rd/4th gear and 5th gear are connected positively to the input shaft via a longitudinal grooved spline.
After one of the gears is engaged, the corresponding "idler gear" is also connected to the input shaft.
Locking rings hold the gears in position.
The output shaft
has a fixed / idler bearing.
As with the input shaft, the output shaft runs in bearings in the gearbox housing
- together with a cylindrical roller bearing (idling) in the clutch housing
- together with a grooved ball bearing (fixed) which is mounted together with the input shaft in the bearing assembly.
For mass reduction, the output shaft is hollow-drilled.
The 3rd, 4th and 5th gear wheels and the synchromesh body for 1st/2nd gear are positively connected to the output shaft in the direction of rotation by means of close-spaced gear teeth.
Locking rings hold the gears in position.
The 1st and 2nd gear wheels are idler gears and run in needle bearings on the output shaft.