With abundant droplet release, the condition of the stuffing box should be determined, for which:
- put the car on a lift or inspection ditch, clean the breather from dirt and check its condition, unscrew the control plug and check the oil level in the axle housing. If necessary, bring the oil level to normal;
- they clean the neck of the gearbox housing from traces of oil and wipe it dry, hang the rear axle and put it on stands, start the engine, turn on the direct gear and, when the speedometer reads 90-100 km / h, heat the oil to a temperature of 80-90°C (within approximately 15 minutes);
- with the direct gear engaged, with a reading of 100 km / h, the amount of oil flowing out in 15 minutes is determined.
Oil leakage exceeding 5 drops in 15 minutes is a sign of seal failure.
A damaged oil seal can be replaced without removing the gearbox from the vehicle, unless other gearbox parts need to be replaced. The procedure for replacing the seal is as follows:
- drain the oil from the crankcase of the rear axle, loosen the rear wheel nuts, put stops under the front wheels and hang out the rear axle;
- release the parking brake and set the gearshift lever to neutral;
- remove the wheels and brake drums, unscrew the nuts securing the shield 1 of the brake (see fig. 79) to the bridge beam, the ejector removes the axle shafts from the differential box (see fig. 80), disconnect the cardan shaft from the drive gear flange and move it to the side;
- check the moment of resistance to turning the drive gear with a dynamometer (see fig. 94) and remember it;
- holding the flange with a special key (pic. 98), unscrew the nut of the drive gear flange and remove it together with the washer, as well as the drive gear oil seal, and then install it without distortion with a mandrel (pic. 99) a new oil seal, having previously lubricated its working surfaces with Litol-24 grease;
- install the flange with the washer on the drive gear and, holding the flange with a special wrench, tighten the flange fastening nut, periodically checking the moment of resistance to turning the drive gear with a dynamometer. If the initial moment of resistance to rotation was 6 kgf cm or more, then the new moment of resistance to rotation should be 1–2 kgf. see more original. If it was less than 6 kgf cm, then the flange fastening nut is tightened until a moment of resistance of 6-9 kgf cm is obtained. If, when tightening the nut, the moment of resistance to turning is exceeded, then the gearbox is disassembled and the spacer sleeve is replaced, after which the gearbox is assembled and re-adjusted.