Using a special holder (Fig. 3.12), secure the gearbox to the mounting stand.
Unscrew the gearbox mounting bracket from the chassis.
Drain the gearbox oil through one of the driven shaft bearing holes.
Remove the shaft with the clutch release forks (Fig. 3.13).
Unscrew the gearbox cover mounting bolts (Fig. 3.14) and remove the cover.
Unscrew the two cap nuts and remove the pins and springs of the gear selector lock mechanism.
Remove the selector finger (Fig. 3.15).
Remove the expansion locking ring (Fig. 3.16) and remove the driven gear of the fifth gear together with the synchronizer parts. First remove the forks of the fifth gear.
Remove the fifth gear pinion retaining ring and remove the pinion using puller 16-035.
During installation, the expansion retaining rings must be replaced with new ones.
Unscrew the bolts and remove the fifth gear housing (Fig. 3.17).
Remove the expansion rings that secure the rolling bearings (Fig. 3.18).
Remove the upper part of the gearbox housing. To do this, unscrew 14 bolts.
Remove the magnetic insert. Be careful not to drop the insert, as this may cause it to break.
Remove the retaining rings from the selector guide and the fork disengaging the first and second gears (Fig. 3.19). Remove the guide sleeve.
At the same time, remove both shafts from the gearbox housing together with the forks and the reverse driven gear.
Remove the gearshift lock plate.
Remove the main gear pinion with the differential housing from the housing.
Remove the secondary shaft roller bearing only if damage is detected. To remove the bearing, it is necessary to damage the roller guide basket and remove it, partially removing the rollers from the basket.
Using pliers, remove the oil deflector (oil slinger).
Using puller 16-021 and impact puller 15-035, remove the roller bearing ring.
A bearing removed in this way is unsuitable for further use and must be replaced with a new one.
Remove the primary shaft seal.
Remove the secondary shaft seal.
Remove the differential bearing rings.