In the article we will consider the disassembly of the driveshaft and the replacement of the crosspieces

We install the car on the observation ditch or lift and remove the gimbal gear, as described in the previous article

Disassembly of the cardan joint

Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

We shake each hinge in both planes. At the same time, there should be no backlash, clicks and jams

Since the driveshaft is balanced at the assembly plant, each time it is disassembled and assembled, it is necessary to maintain the original mutual position of the shafts. Otherwise, a noticeable vibration may occur when the car is moving.

Repair of the driveshaft of the car UAZ-3151, -31512, -31514, -31519Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

We make marks with a chisel or a core on the forks of the hinge

Using a screwdriver, we remove the locking rings of the bearings of one axis of the hinge

We install a smaller diameter mandrel on the side of the oil pan, and a larger mandrel on the opposite side, clamp the hinge in a vice or on a press

Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

We press out two bearings of the hinge axis

When pressing out, you need to be careful not to deform the hinge cuff on the fork eye

Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

We take out the bearing that came out and, with a screwdriver, we remove the second bearing from the spike of the crosspiece

Repair of the driveshaft of the car UAZ-3151, -31512, -31514, -31519Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

Disassembling the gimbal joint

We remove the seal clips from the crosspiece spikes

We also press out the other two bearings and remove their seals

Repair of the driveshaft of the car UAZ-3151, -31512, -31514, -31519Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

With a key for 8, unscrew the oil press

We wash all the parts in kerosene and inspect them

If needle marks, corrosion and other damage are noticeable on the spikes of the crosspiece, we replace the crosspiece with bearings

Cuffs with damage are replaced with new ones.

When installing new bearings, we clean them from preservative grease and wash them in kerosene

When assembling, we orient the hinges so that the oil presses of both crosspieces are facing towards the splined joint

Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

At the same time, the oil presses of the spline joint and the crosspiece located at the bridge were in the same plane and on the same side of the shaft, and the oilcan of the crosspiece of the opposite end of the shaft was rotated 90° counterclockwise when viewed from the side of the bridge (see Fig. 12).

Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

We assemble the hinge in the following order: we put mechanical seals on the two spikes of the axis of the crosspiece and insert the crosspiece into the eyelets of the fork. We install bearings in the eyelet holes

Centering the crosspiece relative to the bearings

Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

In a vice or on a press, we press the bearings into the eyelets through the mandrel, turning the crosspiece slightly to avoid pinching the bearings

Installing locking rings

If one of the rings does not pass into the groove, we press the crosspiece so as to select the gap between the eyelet and the installed ring, after which we install the second locking ring

Disassembly of the splined joint

Repair of the driveshaft of the car UAZ-3151, -31512, -31514, -31519Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

Using a chisel, we straighten the stuffing box in the places of its contouring core

Unscrew the holder with a pipe wrench and shift it along the shaft

Repair of the driveshaft of the car UAZ-3151, -31512, -31514, -31519Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

Using a chisel, we put the installation marks on the sliding fork and the driveshaft

Removing the sliding fork from the shaft

Repair of the driveshaft of the car UAZ-3151, -31512, -31514, -31519Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

We pry with a screwdriver and push the steel, felt, rubber and second steel split rings out of the cage alternately

Removing the rings from the shaft

Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

Removing the clip from the shaft

We clean the spline joint from dirt and old grease

We wash the parts in kerosene or diesel fuel

Traces of scuffing and corrosion on the slots and the smooth part of the shaft are removed with fine sandpaper

Heavily worn and damaged rubber and felt rings are replaced

Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

We measure the radial clearance in the slot connection, for this:

- inserting the spline shank into the shaft hole, and swinging the shaft with an indicator installed at a distance of 80-100 mm from the slots, we measure the gap.

It should be no more than 1.5 mm. Otherwise, we replace the gimbal assembly

We apply grease to the shaft slots, impregnate the felt ring with transmission oil

Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

We assemble the slot connection by combining the mounting marks, while the hinge forks should stand in the same plane

Repair of the driveshaft of the UAZ-3151, -31512, -31514, -31519

We fix the clip on the shaft with a chisel