The gearbox allows you to change the torque transmitted from the engine to the drive wheels, which allows you to keep the engine speed in the desired range. This unit has heavy loads, so it breaks down during long-term operation.
Instructions
Step 1
In order to disassemble the gearbox, first of all, it is necessary to drain the oil from it. Then we unscrew the bolts that hold the bottom cover, and carefully remove it, trying not to spoil the gasket.
Step 2
Then we unscrew the elastic coupling, which is held by three bolts, and take it out together with the spring. We unscrew the three nuts securing the gearshift mechanism and take it out.
Step 3
We unscrew the 5 nuts on which the back cover is attached, and carefully remove it, turning it to disengage the gear. We unscrew the bolts holding the stem and fork. By moving the switch-on fork, we take out the reverse gear.
Step 4
We place the box in such a way that you can remove the clutch fork and the input shaft bearing. We unscrew the 6 bolts securing the clutch housing and, after tapping, remove it. At the same time, we try not to damage the gasket.
Step 5
We stop the intermediate shaft by inserting a metal plate between the gears, and unscrew the bolt securing the clamping washer. After that it will be possible to remove the intermediate shaft with gears.
Step 6
We unscrew the bolts of the locking rod cover, take out the springs and balls. Pay attention to the reverse spring, it is different from the others. Next, unscrew the shift forks of 3rd and 4th gears, and after that 1st and 2nd gears. After tapping lightly, slowly take out the stocks, while making sure that the "crackers" do not fly out. "Crackers" have different landing sizes, so remember their relative position. We take out the input shaft.
Step 7
To finally disassemble the gearbox, using an impact screwdriver, unscrew the screws of the secondary shaft bearing retaining plate and take it out. All parts are thoroughly washed in diesel fuel. We check them and replace the worn ones. We assemble the box in reverse order. In order to avoid loosening the bolts, we use an anaerobic thread lock.
