Timken bridges on UAZ description. UAZ bridges. Assembly and adjustment of rear axle units

• Rear axle structure of UAZ 469 Carter
• Gearbox
• Half shafts

The UAZ 469 car is used both in the Russian Federation and abroad. The design of the front axle of the UAZ 469 allows you to forcibly engage all-wheel drive. Thanks to this design, the vehicle has high cross-country ability. Below is a description of the 469 axle design.

Front axle UAZ loaf model Timken

Image of the front axle UAZ Bukhanka type Timken

UAZ front axle design

Front axle shank of UAZ Bukhanka

UAZ front axle gearbox

CV joint and steering knuckle of the front axle UAZ Bukhanka

Front axle hub UAZ Bukhanka

Features of using blocking on UAZ

A differential lock is a special mechanism by which the unit is locked so that it cannot perform its main function. In this case, all the wheels of the car begin to work equally. The presence of such a mechanism is good for those cars that often go off-road: that’s where it will be needed. Differential locking is most needed on the UAZ, which is considered a real all-terrain vehicle.

The presence of such a mechanism increases the vehicle’s maneuverability on difficult sections of the road. This increases the load on some parts of the transmission. Locking the front differential can affect your vehicle's cornering ability. Do not use this mechanism too often; it should only be used on particularly difficult sections of the road.

Currently, there are several types of locks.

• Self-locking differential of a rigid type, which should automatically operate in the event of a difference in wheel speed. When using it, you can expect deterioration in the car's performance when cornering.
• The hydraulic cylinder is controlled by a special lever located inside the car.
• An electric drive that operates via a compressor and is controlled by a button on the remote control.
• The pneumatic drive operates similarly to the previous version.

Appearance of the mechanism

In a UAZ that has a self-locking differential, the device will be blocked if the suspension wheel is twisted a few degrees. The differential can remain in this state for quite a long time, while all remaining parts are not subject to wear.

Installing a lock on a UAZ Patriot can be done in several ways:

• increased friction for limited slip
• installation of a self-locking differential on a UAZ
• the use of cabinets that ensure maximum rigidity of the mechanism.

Checking and adjusting the axial clearance of the Timken UAZ Bukhanka bridge pins

In this section, we will look at checking and adjusting the old-style UAZ Bukhanka front axle pins. Adjusting and checking the axial clearance of the pins is performed in the following sequence.

1. It is necessary to install stops under the front and rear wheels;
2. Jack up the front axle from the adjustable knuckle side;
3. Unscrew the wheel nuts and remove the front wheel;
4. Unscrew the ball joint oil seal bolts and move the oil seal to the side;
5. We check the play in the king pins. To do this, holding the top and bottom of the brake drum with your hands, rock it in a vertical plane;
6. To eliminate play in the kingpins, unscrew the nuts of the studs securing the steering knuckle lever 9 or the bolts of the lining 15 and remove the lever or lining;
7. Remove the adjusting shim with a thickness of 0.1 mm;
8. We install the upper trim 15 or the steering knuckle lever 9 in place;
9. Unscrew the bolts of the lower lining 30 of the steering knuckle and remove it;
10. We take out the lower adjusting shim with a thickness of 0.1 mm. To maintain the alignment of the steering knuckle joint, it is necessary to remove shims of the same thickness from above and below;
11. We mount the lower pad 30 of the steering knuckle in place;
12. We check the play in the steering knuckle pins of the front axle of the UAZ Bukhanka as described in point 5;
13. If there is still play, then instead of a 0.1 mm thick gasket, remove a 0.15 mm thick gasket;
14. If one 0.15 mm spacer is not enough to eliminate play in the pivots, then remove two 0.1 mm spacers. In this way we achieve the elimination of gaps in the king pins.
15. After eliminating the gaps in the kingpins, we mount the ball joint oil seal in place;
16. We mount the front wheel in place;
17. Using the same method, we eliminate the play in the kingpins of the second steering knuckle;
18. Remove the wheel chocks from under the wheels.

Excessive wear of the pins 14 and bushings 29 in diameter causes a violation of the camber angle of the wheels, their “wobbling” when driving and uneven wear of the tires. If this is observed on your UAZ car, then replace bushings 29 and king pins 14.

Gearbox device

The UAZ 469 gearbox for the wheels of the front drive axle is absolutely identical in design to the wheel gearbox of the rear axle. The only difference from it is the installation and fastening of the drive gear, as well as the design of the ball bearing 10, which is mounted in a special cup. The rear axle of the UAZ 469 collective farm axle has a slightly different gearbox design.

The drive gear is located on the involute splines of the driven hinge fork. It is secured together with the bearings with a special nut 19, which, after tightening, is drilled into the groove of the UAZ-469 front axle shaft. A support washer 20 is installed in the gap between the gear and the roller bearing.

The drive gear and ball bearing of the front drive axle gearboxes are not interchangeable with similar parts of the rear gearboxes. In all other respects, the front gearboxes are designed identically to the rear gearboxes and require the same maintenance and repair.

Front axle UAZ 469 military (Front axle with final drive)

General view of the front military axle UAZ 469

Design of the front military axle UAZ 469

UAZ front military axle shank

Differential of the front military axle UAZ 469

Knuckle of the front military axle UAZ 469

* — As part of the front axle 3151-2300010

*1 — Balls of the following letter series: 508626-A, 508626-B, 508626-B, 508626-G, 508626-D, 508626-E, 508626-Zh, 508626-I, 508626-K

*2 - As needed

Reducer of the front military axle UAZ 469

* — As part of the front axle 3151 -5300010

*1 Installed in the axle configuration 3151 -2300011 -03 instead of 3151 -2307091, 4S2-2304 AND 2-01,452-3103065

Maintenance

Maintenance of the rear axle consists of maintaining the oil level in the crankcase and replacing it in a timely manner, checking the seals, and timely detecting and eliminating axial clearances in the final drive gears. Periodically clean the safety valve and tighten all fasteners.

If the oil in the crankcase is heavily contaminated or there are metal particles in it, wash the crankcase with kerosene before adding fresh oil. To flush, pour 1–1.5 liters of kerosene into the crankcase; raise the wheels, start the engine and let it run for 1.0–1.5 minutes, then drain the kerosene and fill with fresh oil.

Rice. 3.79. Rear axle: 1 – safety valve; 2 – differential bearing; 3.8 – adjusting shims; 4 – rear bearing of the drive gear; 5* – adjusting ring; 6 – oil removal ring; 7 – nut; 9 – drive gear; 10 – front bearing of the drive gear; 11 – thrust washer of the semi-axial gear; 12 – driven gear. (* Not installed since 1991)

Axial play of the drive gear of the fixed gear is not allowed. Check the clearance by rocking the drive gear by the driveshaft mounting flange. If an axial play of the drive gear of more than 0.05 mm appears during vehicle operation, tighten nut 7 (Fig. 3.79). Tightening torque – 167–206 N m (17–21 kgf m). If the gap does not disappear, make adjustments as indicated in the chapter “Assembling and adjusting rear axle components.”

Axial play of the main drive driven gear is not allowed. Check it by moving the gear through the oil filler hole. To eliminate the gap, add sets of shims of equal thickness between the ends of the differential and bearings.

Do not add shim sets of different thicknesses or install them on the same side of the driven gear because this will lead to disruption of the engagement of worn-in gears and their rapid breakdown.

Advantages and disadvantages

Automation has a number of advantages:

• The lock is activated in any difficult situation, and the driver does not need to be distracted to activate it.
• An automatic system is much easier to install than a manual lock.

However, there are also disadvantages to consider:

• The constant locking effect makes itself felt: the steering wheel twitches slightly and the wheels make noise when turning.
• The moment the gears are automatically engaged is clearly felt by a click, which irritates many.

Types of locks

A differential lock is primarily used to transfer engine torque to the wheel that has the best traction. Based on this, differentials are divided into center and center differentials, which differ in the way they are locked. Any of these options can be installed as a UAZ Patriot differential.

Previously, only forced locks, which appeared on the automotive market just a few years ago, were used for such purposes. Produced under the Sprut brand, this blockade operated by analogy with the well-known EPIRB. Today there are several other types of locks, which differ greatly in their operating principle.

The screw retainer is already used on UAZ and differs from its predecessors in its relatively long service life. The service life of the mechanism is almost the same as that of the integrated transmission, and at the same time it has good cross-country characteristics. This type works especially well on slippery surfaces. But there is one problem: as soon as the car loses control of at least one wheel, the system begins to fail and its performance immediately drops.

Lock testing

The Krasikov type automatic differential looks very similar to its own, this type of locking proved to be the best in all tests, regardless of the type of task being performed. During testing, this type of blocking turned out to be the best, no matter what tasks were offered. It is not yet known how long the mechanism will work properly and without failures.

The operation of the cam lock depends on the steering cams. When at least one wheel of the car slips, the cams engage with the gears. This system has proven itself on slippery roads. It will last quite a long time regardless of operating conditions.

The operation of a cam lock depends entirely on the rotating cams. If at least one of the car's wheels slips, the cams engage with the gears. This system has proven itself on slippery roads. It will last quite a long time regardless of operating conditions.

Advantages and disadvantages

First of all, you should pay attention to the advantages of manual differential locking:

• When the system is switched off, the differential operates as standard and you can get the most out of it.
• The driver decides when to lock the system, so the limiter is not used in vain.

However, the disadvantages are the following:

• You have to look away from the controls for a while to press a switch, and you often have to do this under the most challenging conditions.
• The lock must be turned off in time, otherwise the differential itself can be damaged.
• It is necessary not only to install the limiter itself, but also to mount the mechanism that will activate it and the button on the instrument panel.

Advantages and disadvantages of locking systems

The hard version of the lock will be gradual. Destroy the car's gearbox. When driving on this element, the car constantly affects the so-called Variable Force Sign. This results in engine torque being transmitted to only one wheel, causing shaft interruption.

Using a positive lock has one advantage: the driver turns it by hand. As a rule, the cost of this option is quite significant, but there are no other visible defects. A differential mechanism with increasing types of friction or self-locking allows torque to be transmitted to both wheels at the right time, and the car can continue to drive.

The downside to this option is that the mechanism installed tends to cause both wheels to spin at the same speed even when going around corners. As a result, despite attempts to turn the steering wheel in any way, the car automatically goes straight. The cost of this differential mechanism is relatively low, and its installation does not take much time. The driver is then required to take special care when performing any maneuvers on the road.

You can buy a differential locking mechanism at any automotive market or specialty store. You can use the manufacturer's services and purchase the product. The most important thing is to know what type of device is suitable for this car. For UAZ, it is best to use the Military Axis and Spicer connection locking mechanism.

You can buy a differential lock mechanism at any automobile market or in a specialized store. You can use the manufacturer's services and purchase the product. The most important thing is to know what type of device is suitable for this car. For UAZ, it is best to use the interaxle difference between the “military axle” and the “Spicer”.