- Remove the cork (1, fig. 2.48) filler holes from the front axle gearbox.
- Remove the cork (M22x1.5) drain hole and let the oil drain from the front axle gearbox.
- Replace the O-rings on the front axle reduction screw plugs. Clean and screw in the drain plug, tightening it to 65 N.m (6.5 kgf·m). Dispose of the drained oil for recycling.
- Pour oil into the front axle gearbox up to the lower edge of the filler hole, until it starts to overflow. Allow excess oil to drain and clean the front axle gearbox housing.
- Screw in and tighten the screw plug (1) filler hole RK torque 65 N.m (6.5 kgf·m). Make a short trip, about 5-7 km, and check the tightness of the RK, oil leaks are not allowed.