Heat the gears of III and IV gears to a temperature of 120-150°C.
When pressing the gears of III and IV gears onto the intermediate shaft, it is necessary to direct their shoulders towards the gear of the II gear.
Using a press, press the 3rd gear gear onto the shaft with a force of 7 tf and install the retaining ring.
Repeat the above operations for the 4th gear, then press the front bearing onto the intermediate shaft.