2. Disconnect the cardan shaft from the gearbox.
a) Loosen the four threaded connections shown in the figure.
b) Place the rag as shown in the figure to avoid damaging the seal.
c) Using a brass rod and a hammer, remove the driveshaft.
d) Unscrew the four mounting bolts and disconnect the propeller shaft.
Note: Secure the drive shaft.
3. Remove the connecting flange.
a) Loosen the nut.
b) Holding the flange, unscrew the nut.
c) Using a puller, remove the connecting flange.
4. Remove the front oil seal and oil deflector.
a) Using a puller, remove the oil seal.
b) Remove the oil deflector.
5. Remove the front bearing and spacer sleeve.
a) Using a puller, remove the front bearing.
b) Remove the spacer sleeve.
6. Install the new spacer sleeve and front bearing.
a) Install a new spacer sleeve onto the shaft.
b) Install the front bearing onto the shaft.
7. Install the oil deflector and new seal.
a) Install the oil deflector.
b) Using a drift, install a new seal.
- Installation depth: 1.7-2.3 mm
c) Apply grease to the seal lip.
8. Install the connecting flange.
a) Using a special tool, install the flange onto the shaft.
b) Apply grease to the threads of the new nut.
c) Hold the flange and tighten the nut.
- Tightening torque - 110 Nm
d) Using a torque wrench, measure the preload of the main gear pinion bearings.
Bearing preload:
- new - 1.0-1.6 Nm
- previously used - 0.5-0.8 Nm
If the preload is greater than the permissible value, replace the spacer sleeve.
If the preload is less than the permissible value, tighten the nut with the specified tightening torque step until the preload reaches the specified value (do not exceed tightening torque of 240 Nm).
- Nut tightening torque step - 13 Nm
If the preload exceeds the maximum allowable value when tightening the nut, replace the spacer sleeve and repeat the adjustment procedure.
Note: Do not adjust the preload by loosening the nut.
9. Lock the nut and connect the cardan shaft.
10. Fill the gearbox with transmission oil.