All articles on the device and repair of rear axle units, gearbox and differential of VAZ-2121 Niva cars and their modifications.
Rear axle device The rear axle device is shown in fig. 3-57. Pic. 3-57. Rear axle: 1 - decorative cap; 2 - a bolt of fastening of a brake drum and a wheel; 3 - half shaft bearing oil deflector; 4...
Removal and installation of the rear axle Removal and installation of the rear axle beam are described in the chapter « Rear suspension ». To remove the rear axle, it is enough to disconnect the suspension rods and shock...
Disassembly and assembly of the rear axle Disassembly Remove the pipeline with the tee of the brake system from the axle, while disconnecting the ends of the tubes from the brake wheel cylinders. Install the bridge on a...
Checking the rear axle beam Carefully check the technical condition of the beam, especially when repairing a car that has crashed. A deformed beam can cause rear axle noise and accelerated tire wear. The...
Editing the rear axle beam Attach flanges A.70172 to each end of the beam (used for straightening, not for checking beams) and install it on the supports of the hydraulic press so that the ends of the...
Half shafts — removal and installation Remove the wheel and brake drum. Having unscrewed the nuts securing the brake shield to the axle beam, using ejector 67.7823.9516, holding the brake shield, remove the axle shaft...
Half shafts — checking the technical condition Check the technical condition of the parts included in the axle shaft kit and make sure that: the ball bearing is not worn or damaged; if the axial clearance in it exceeds 0.7 mm,...
Half shafts — removal of the locking ring It is only necessary to remove and install the locking ring of the axle shaft bearing using a hydraulic press. Bend the holders 39 outwards first ( rice. 3-57 ) bolts securing...
Half shaft assembly Place the semi-axle vertically, resting it with the flange on the wheel 7 (pic. 3-65) accessories 67.7823.9530. Pic. 3-65. Pressing in the locking ring of the axle shaft bearing:...
Rear axle gear device The rear axle reducer assembly is shown in fig. 3-68. Pic. 3-68. Rear axle reducer: 1 - drive gear; 2 - driven gear; 3 - satellite; 4 - gear half shaft; 5 - axis of the...
Determination of gearbox faults by noise Carry out troubleshooting in the following order: Challenge #1 To clearly identify the nature of the noise, drive along the highway at a speed of approximately 20 km/h. Then...
Removal and installation of a reducer Removing If necessary, remove only one gearbox: drain the oil from the bridge beam; raising the rear of the car, place it on stands and remove the wheels and brake drums; unscrew...
Gearbox disassembly Fix the reducer on the stand. Remove lock plates 9 ( rice. 3-68 ), unscrew the bolts 7 and remove the covers 8 of the bearings of the differential box, the adjusting nuts 10 and...
Checking the technical condition of the gearbox parts Rinse thoroughly before inspecting gearbox parts. This will make it easier to detect wear and damage to parts. Check whether there are any damages on the teeth of the final drive...
Gear Assembly Reliable operation of the gearbox is ensured by strict adherence to the following assembly and adjustment procedures. Gearbox details are shown in fig. 3-72. Pic. 3-72. Rear axle...
Pinion bearing adjustment To limit the axial displacements of the drive gear under operating loads, it is very important to create a preload in its bearings within the specified limits. Preload is...
Replacing the drive gear oil seal The need to replace the oil seal is determined by a decrease in the oil level in the rear axle housing (due to oil leakage through the stuffing box) to a level that disrupts the...