Onboard reducer UAZ 469. Axles UAZ with final drives reducer axles. Video replacement and adjustment of the main pair on the UAZ military bridge

Many variants of bridges were installed on UAZ vehicles of different models and at different times at the plant. Let's try to figure it out ...

UAZ Timken bridge (civil or collective farm)

This is a split type bridge, that is, a bridge consisting of two halves. This type can also be attributed (it is gear or portal). From the factory, civil bridges are installed on UAZ trucks of the cargo range (loaf, onboard,), as well as on UAZ-3151 passenger cars (469).

Gear ratios of military bridges UAZ

The gear ratio of military bridges is 5.38 (= 2.77 * 1.94 - the gear ratios of the main and final drives, respectively) - more high-torque, but less high-speed than that of conventional bridges.

Military bridge characteristics

• Ground clearance: 300 mm (with tires I-192 215/90 R15 (31 x 8.5 R15)
• Track: 1445 mm
• Track of UAZ Bars gear axles: 1600 mm
• Front military axle weight UAZ: 140 kg
• Rear military axle weight UAZ: 122 kg

Diagram of the gear (military) bridge UAZ

Rear axle UAZ with final drive:

1 - cover of the main gear housing; 2 - differential bearing; 3,13,49 - shims; 4 - a sealing gasket; 5,7 - drive gear bearings; 6.15 - adjusting rings; 8.42 - cuffs; 9 - flange;
10 - nut; 11 - dirt reflector; 12 - ring; 14 - spacer sleeve;
16 - leading gear wheel of the main transfer; 17 - satellite; 18 - right semiaxis; 19 - side gear housing; 20.29 - oil deflectors; 21 - semi-axle bearing; 22,26,40 - retaining rings; 23 - sealing gasket of the side gear housing; 24 - side gear housing cover; 25 - bearing; 27 - brake shield; 28 - brake drum; 30 - wheel bolt; 31 - pin; 32 - hub bearing; 33.41 - gaskets; 34 - lock washer; 35 - leading flange; 36 - nut of hub bearings; 37 - lock washer; 38 - bushing; 39 - the driven shaft of the side gear; 43 - driven shaft bearing; 44 - driven gear wheel of the side gear; 45 - special nut; 46.50 - drain plugs;
47 - the leading gear wheel of the side gear; 48 - right cup of the satellite box; 51 - main gear housing; 52 - washer of the semi-axle gear;
53 - semi-axle gear; 54 - axis of satellites; 55 - driven gear wheel of the main transfer; 56 - left cup of the satellite box; 57 - left semi-axis

Steering knuckle of the front axle UAZ with final drive:

a - signal groove;
I - right steering knuckle; II - left steering knuckle; III - wheel cut-off clutch (for variant, see Fig. 180, IV); 1 - oil seal; 2 - ball bearing; 3 - steering knuckle joint; 4 - gasket; 5 - grease nipple; 6 - kingpin; 7 - pad; 8 - steering knuckle body; 9 - king pin bushing; 10 - bearing; 11 - the driven shaft of the side gear; 12 - hub; 13 - leading flange; 14 - clutch; 15 - retainer ball; 16 - protective cap; 17 - coupling bolt; 18 - pin; 19 - lock nut;
20.23 - support washers; 21 - the leading gear wheel of the side gear; 22 - locking pin; 24 - rubber sealing ring; 25 - thrust washer; 26 - axle shaft casing; 27 - bolt of rotation limitation; 28 - stop-limiter for wheel rotation; 29 - steering knuckle lever

The device of the military bridge (photo)

Video replacement and adjustment of the main pair on the UAZ military bridge

Bridges Spicer UAZ Patriot and Hunter

Spicer is not a split, one-piece bridge.

In the early 90s, for the new UAZ-3160 vehicle at the Ulyanovsk Automobile Plant, Spicer-type drive axles with a one-piece crankcase were developed.

The absence of a connector in the transverse plane of the axle gives the structure high rigidity, the unloaded connection of the cover and the crankcase reduces the likelihood of leakage along the joint, and the placement of the main gear and differential in a single crankcase ensures high accuracy of engagement and more favorable conditions for the operation of bearings.

• Spicer bridges width for UAZ Patriot - 1600 mm
• Width of Spicer bridges for UAZ Hunter - 1445 mm

Spicer bridge differential

On UAZ cars of the old model range, two types of driving axles were installed. Front and rear axles with main gear were installed on bonnet-type cars of the UAZ-459B and UAZ-31512 families, and cars of the carriage layout of the UAZ-3741, UAZ-3303, UAZ-3962 and UA3-2206 families. U-shaped front and rear axles with wheel reducers were installed only on cars of the UAZ-469 and UAZ-3151 families.

Installation of U-shaped driving axles with wheel reducers, complete front and rear axles, on vehicles of the UAZ-469B and UA3-31512 families is possible with the simultaneous installation of the shafts of UAZ-469 and UAZ-3151 vehicles. Installation of U-shaped axles with wheel reducers on a family of cars of a carriage layout is very difficult, since it will require significant improvements in the design of bridges, bipod, bipod thrust, car suspension, and the manufacture of cardan shafts shortened by 10 mm for these cars.

Rear axle with wheel reducers for UAZ-469, UAZ-3151 vehicles, general arrangement.

The rear axle casing is split in the vertical plane, consists of two parts: a crankcase and a cover, connected by bolts. The main gear consists of one pair of bevel gears with a spiral tooth: leading and driven. The gear ratio of the main transfer is 2.77. The main drive pinion is mounted on two tapered roller bearings. A spacer sleeve, an adjusting ring and shims are located between the inner bearing rings.

An adjusting ring is installed between the inner ring of the bearing and the end of the pinion gear. The flange is connected to the pinion with splines. The pinion bearings are tightened with a nut, which is then cottered. To prevent oil leaking from the crankcase, an oil seal is provided in the design.

The driven gear of the final drive is mounted on the satellite box and is bolted to its flange. The differential is conical, with four satellites, has a split box, consisting of two halves connected by bolts. The differential is mounted on two tapered roller bearings. Washers are installed between the gears of the axle shafts and the ends of the satellite box

Shims are located between the ends of the satellite box and the inner rings of the bearings. A safety valve is located on the left casing of the axle shaft, which connects the inner cavity of the bridge to the atmosphere.

Wheel reducers of the rear axle UAZ-469 and UAZ-3151.

Designed to increase ground clearance, which accordingly increases the vehicle's cross-country ability. The wheel reducer consists of one pair of internal spur gears with a gear ratio of 1.94. The gearbox housing is split in the vertical plane, consists of two parts: a crankcase and a cover, connected by bolts.

The pinion gear is mounted on the spline end of the half-shaft between the ball (inner) bearing and the roller (outer) bearing. The inner ring of this bearing is locked by a ring, and the outer one is installed in a removable casing, which is attached to the support of the wheel reducer crankcase with two bolts. The ball bearing is locked in the crankcase with a ring. An oil deflector is located between the bearing and the crankcase.

The driven gear of the wheel reduction gear is centered on the shaft shoulder and is bolted to its flange. The driven shaft is supported by a bushing and a roller bearing, which is locked with a nut. Unlike the left wheel gear, the driven gear shaft and the right gear nut have a left-hand thread. On the nut, the left-hand thread is marked with an annular groove, and on the shaft by blind drilling with a diameter of 3 mm at the end face of the spline end.

Maintenance of the rear axle with wheel reducers of UAZ-469 and UAZ-3151 vehicles.

It consists in maintaining the required oil level in the crankcases and changing it in a timely manner, checking the seals, timely detecting and eliminating axial play in the gears of the main drive, periodically cleaning the safety valve and tightening all fasteners. The oil level in the crankcases should be at the lower edges of the filler holes. The oil is drained through the drain holes located in the lower part of the crankcases, while the filler plugs are also turned out.

Axial play of the driving gear of the main drive is not allowed, since if it is present, there is a rapid wear of the gear teeth and the rear axle may jam. If it appears, it is necessary to adjust the bearings. The axial play is checked by swinging the drive gear by the shaft mounting flange.

Axial play of the driven pinion of the final drive is also not allowed. Checking is done through the oil filler hole. To eliminate the axial play of the driven gear of the main drive, which appeared during operation, it is necessary to add a package of gaskets of the necessary, but always the same thickness on the left and right sides of the satellite box, while ensuring that the driven gear rotates with little effort. If you add spacers of different thicknesses on the left and right sides of the satellite box, the engagement of the running gears will be disrupted, which will lead to a quick breakdown of their teeth.

After a run of 50,000 kilometers, during the next maintenance, the bolts of the driven gear of the wheel reducer and the driven gear of the main transmission are tightened with a torque of 6.5-8 kgcm, as well as the bolts of the removable bearing housing are tightened with a torque of 6.5-8.0 kgcm.

The adjustment of the clearances in the meshing of the gears and in the bearings of the rear axle is carried out only when replacing the gears or bearings, or when an axial play of the driving or driven gears of the main drive appears. Replacement of the main drive gears is made only as a set.

The device of the front axle of the UAZ 469 differs from the rear analogue in some design features. In addition to the bridge girder and differential, the unit includes equal speeds at the corners and a gearbox. The axle shaft casing is connected to the ball joint by means of a flange. The hinge body is fixed with a pair of pins. A gearbox cover with a trunnion and a brake shield is bolted to the frame.

Description

To reduce the degree of wear of the unit parts, it is recommended to turn off the front axle of the UAZ 469 when moving on a hard surface, the device of which will be discussed below. You should also deactivate the hubs on the front wheels. To do this, remove the caps and unscrew the bolts from the shaft seat. As a result, the coupling is set to the position corresponding to the annular groove and the face of the coupling. After installing this element in the required position, they begin to tighten the protective cap.

The front wheel is activated by securely locking the bolts. The bridge design scheme is focused on synchronous switching on and off of the drive of both wheels.

Front axle device UAZ 469

The crankcase, main gear and differential correspond to those of the rear counterpart. In modification 469B, an oil deflector ring and a right-hand thread with the "P" brand are provided. A ball joint is attached to the axle housing. It is fixed with five bolts. Bushings and pivots are pressed into it. In addition, the support has a wheel reducer housing cover and a steering knuckle housing. A trunnion and a brake shield are attached to the locking element with six bolts.

The pivot attachment of the rotary cam is mounted with an interference, the value of which is adjustable from 0.02 to 0.10 mm. To prevent this element from turning, locking pins are provided in the design. Position adjustment is made by means of shims installed at the top, between the knuckle lever. In addition, the position can be corrected by installing shims in the side and bottom of the part.

Peculiarities

The device of the front axle of the UAZ 469, the photo of which is presented above, assumes the presence of an oil seal, which is responsible for retaining the lubricant in the housing and protecting the rotary cam from contamination. The element consists of an inner cage, a partition, a felt pad and an outdoor unit. The oil seal is attached to the frame with bolts.

Protection against overflow of the lubricant mixture from the main gear housing to the rotary cam is provided by an internal self-tightening rubber gland in a metal cage. The upper pivot elements and the ball joint are lubricated through special grease fittings. The lower elements are lubricated with a substance coming from the support by gravity.

Hinge

The UAZ 469 front axle device includes a hinged angular velocity stabilization system. Its design guarantees the stability of the angular velocity of the driving and follower shafts. In this case, the distance and deviation between them do not play a role. The hinge itself consists of a pair of forks, in the curved sockets of which four balls are placed. In the center compartments of these parts, there is a fifth locating ball that serves to center the forks.

Longitudinal movement of the joint is prevented by a ball bearing and a safety washer. The drive inner fork interacts with the differential pinion axle. On the edge of the outer driven fork, the main gear of the wheel reducer and a roller-type bearing with a lock nut are mounted. Internal engagement of the element takes place by means of a bolted connection. The driven part is aggregated with a roller bearing shaft and a bronze bushing in the middle of the journal. At the end of the shaft there is a device for deactivating the front wheels of the machine. It consists of a movable sleeve, spring, balls and bolts. The part is connected with the outer projections to the inner splines of the flange, which is fixed with bolts on the hub.

Gearbox device

469, the gear unit has almost identical to the wheel gear of the rear axle. Among the differences between these elements is the method of installation and fastening of the drive gear, as well as the design of a ball bearing placed in a special glass socket. The leading one is mounted on the splines of the driven articulated yoke. It is fixed with bearings by means of a special nut, which is drilled into the groove of the shaft after tightening.

The support washer is located between the roller bearing and the gear. These parts are not interchangeable with those of the rear gearboxes. Maintenance is the same for both nodes.

Front axle device UAZ 469: connection diagram

The assembly and connection of the part in question is carried out in the following order:

1. The bushing is inserted into the knuckle pivot by pressing. It should be flush with the end of the seat. Then the sleeve is turned and adjusted with a special brooch to the required diameter.
2. Limiting the movement of the joint of identical angular longitudinal velocities is provided by washers installed in the trunnion and the ball joint. Their location should be directed by the lubrication grooves towards the hinge. The fixing washer is fixed by punching in several places at points evenly distributed around the circumference.
3. Replacing the pivot bushings involves pressing and screwing them to a diameter of 25 mm, with the possibility of passing through each bushing.
4. When installing the hinge, grease is poured into the support.
5. The device of the front axle on the UAZ 469 involves the adjustment of the necessary axial tensions with the help of regulating inserts, on which the location of the bushings and the ball joint itself depends. At least five shims are used. The total thickness indicators at the top and bottom should not have a difference of more than 0.1 mm.
6. Before collecting the oil seal, the felt ring is soaked in warm engine oil.

After assembling the front axle, it is tested on the stand in a static state and under load. This position is created by synchronous braking of the axle shafts. If the unit is assembled correctly, there will be no increased noise of the unit, oil leakage in the oil seals and cuffs, as well as in the joints.

Maintenance

The device of the UAZ 469 front axle, the diagram of which is given above, provides for a number of preventive and adjusting operations during the operation. Among them:

• Periodic tightening of threaded connections.
• Checking pivots for clearances.
• Correction of bearings.
• Repair of gear engagement points.
• Convergence check.
• Regular lubrication of rubbing parts according to the lubricant specification table.

A visual check of the UAZ 469 front axle device provides for an inspection of the steering knuckles for the integrity and suitability of the adjusting screws, limiting rotary stops, as well as the reliability of the stopper of these elements.

The design diagram of the unit under consideration is designed for the maximum angle of rotation of both wheels in the corresponding positions of the order of 27 degrees. An increase in this indicator indicates deformation of the articulated rotary cams, and this significantly complicates the repair.

Adjustment

The device of the front axle of the UAZ 469, the photo of which is given above, in the factory presupposes adjustment of the pivot pin with pretension. In this case, the same number of shims are installed at the top and bottom of the assembly.

The device of the front axle pivot of the UAZ 469 differs in that special attention must be paid to the tightening mode of these elements. Fixation weakens as a result of the gradual wear of the rubbing parts. Gaps along the axes appear between the pivot ends and the support rings.

Repair

The front 469, the design of which is discussed above, can sometimes require repair. For repair, you will need to remove the part and disassemble it. This process is carried out as follows:

• Pads are put on the rear wheels of the car.
• Nuts and other block mounting systems are unscrewed.
• The rod is released from the bipod, after which the nuts on the shock absorbers and the ball pin are removed.
• The fastening of the front springs with linings is dismantled.
• The front part of the car is lifted by the frame, after which the assembly is dismantled.

The front axle of the UAZ 469, the device described above, requires professional maintenance. But if you have the appropriate skills, you can manipulate this block on your own.

A front drive axle with a single-stage main gear was installed on UAZ-469B utility vehicles and cars of a wagon layout of the UAZ-452 family, and a front drive axle with wheel reduction gears on UAZ-469 vehicles.

Front drive axle UAZ-469, UAZ-469B and UAZ-452 family, device.

The crankcase, final drive and front axle differential do not differ from the corresponding axle parts and assemblies. With the exception of the drive pinion slinger ring, which has a right-hand thread and the P stamp - only for single-stage axles. All operations of disassembly, assembly, maintenance, adjustment and possible malfunctions are the same as for.

Front drive axle with side wheel reducers of the UAZ-469 vehicle.

Front drive axle UAZ-469B and cars of the carriage layout of the UAZ-452 family.

The device of the steering knuckle of the front drive axle UAZ.

The steering knuckles of the front axles of the UAZ-469 car and the UAZ-469B cars, and, accordingly, the UAZ-452 differed in structure and design.

The steering knuckle pins are installed with a preload of 0.02-0.10 mm. From turning in the steering knuckle housing, the pins are locked with pins. The preload is adjusted with spacers installed at the top - between the steering knuckle arm (right) or pad (left) and the steering knuckle housing, at the bottom - between the linings and the steering knuckle housing.

To keep the lubricant in the steering knuckle housing and protect it from contamination, an oil seal is installed on the ball bearing, consisting of an inner cage, a rubber ring with a spring, a baffle ring, a felt sealing ring and an outer cage. The oil seal is bolted to the steering knuckle housing.

To prevent oil from flowing from the main gear housing to the steering knuckle, there is a self-tightening rubber gland in a metal cage inside the ball joint. Grease fittings are installed on the steering knuckle arm (right) and on the upper pivot pad (left) to lubricate the upper pivots and add grease to the ball joint. The lower pivots are lubricated with grease coming by gravity from the ball joint.

A constant angular velocity hinge is installed inside the steering knuckle. The design of the hinge ensures that the angular velocities of the driving and driven shafts are constant regardless of the angle between them. The hinge consists of two forks with four balls in the curved grooves. The fifth ball is located in the central sockets of the forks, which is a locating ball and serves for centering the forks.

The joint is limited from longitudinal movement by a thrust washer and a ball bearing. The inner drive hinge fork is spline-connected to the differential side gear. And at the end of the outer driven fork on the splines, only for the steering knuckle of the gearbox of the UAZ-469 car, there is a drive gear of the wheel reducer and a roller bearing, which are locked with a nut.

The driven gear of the internal gear wheel reducer is bolted to a shaft rotating in a roller bearing installed in the wheel reducer housing cover and a bronze bushing installed inside the journal.

Couplings for disabling wheels of the front driving axle UAZ, hubs.

At the end of the shaft there is a device for disconnecting the front wheels of the car, which consists of a movable coupling mounted on the shaft splines, and a bolt with a spring and a ball. The outer splines of the movable coupling are connected to the inner splines of the driving flange, which is bolted to the wheel hub.

To reduce the wear of the front axle parts and save fuel when operating the UAZ on paved roads, it is advisable to turn off the front wheel hubs together with the front drive axle turning off. To do this, remove the protective cap and, by unscrewing the bolt from the shaft hole, set the coupling to the position where the signal annular groove on its surface is located in the same plane with the flange end. With the coupling in the required position, screw on the protective cap.

The wheel is turned on by tightening the bolt and tightening it securely. Operations for engaging and disengaging clutches are performed simultaneously on both wheels of the front axle. Engaging the front axle with the wheels off is not allowed.

Wheel reducer of the front axle UAZ-469.

The device of the wheel reduction gear of the front axle of the UAZ-469 car is almost similar to the device of the wheel reduction gear of the bridge. It differs from it in the installation and fastening of the drive gear and the design of the ball bearing, which is installed in a special glass. The drive gear is mounted on the involute splines of the driven hinge fork and is secured together with the bearings with a special nut, which, after tightening, is drilled into the shaft groove.

A support washer is installed between the gear and the roller bearing. The drive gear and ball bearing of the front gearboxes are not interchangeable with those of the rear gearboxes. Otherwise, the front gearboxes are designed in the same way as the rear ones and require the same maintenance.

Surely on sale you have met UAZ cars, where car owners proudly talked about military bridges, making a mark-up of several thousand rubles. This topic has been discussed more than once. Some say that such cars are worthy of attention, while others, on the contrary, prefer to ride on civilian bridges. What are they and what are their differences? Let's try to figure it out.

Varieties

On UAZ vehicles, two types of mechanisms are used - with a single-stage main gear, as well as with a final drive. The first rear axle (UAZ) military is installed on cars of a wagon layout, the second - on the cargo-passenger model 3151 (in other words, "Bobik"). The driving mechanisms have a U-shaped design and are installed together with cardan shafts. However, the installation of such elements on cars of the carriage layout (of the "tadpole" type) requires significant technical improvements. This applies to the design of the suspension, bipod thrust, axles. Also, for full-fledged work, a cardan shaft shortened by a centimeter is required.

As for the elements with the final drive, they have differences in the middle part, namely, the smaller differential of the military bridge. UAZ with such a mechanism also differs in a different way of installing the main gear gear. There are few differences. It is only mounted on tapered roller bearings. UAZ, the military bridge of which is considered to be more durable, has a more complex design compared to its civilian counterpart. There is an adjusting ring between the pinion gear and the large bearing ring, as well as a spacer sleeve and spacers. The pinion bearings are clamped with a flange nut.

Bridge device

Where are the final drives located? On UAZ-469 vehicles, the military bridges of which are located at the rear, the transmission itself is located in the crankcases, where the necks are pressed onto the outer parts of the axle shaft casings. The drive gears are mounted on the spline end of the axle shaft, between the roller and ball bearings. The latter is fastened with a retaining ring in the crankcase. There is a special oil deflector between the ball bearing and the final drive housing. The roller mechanism is fixed in the housing with two bolts. The inner ring of the bearing is attached to the axle shaft with a circlip. The driven gear is attached to the final drive flange. The driven shaft rests on the bushing and bearing. By the way, the latter has a left-hand thread. The driven shafts of the rear final drive are connected to the wheel hub using splined flanges.

The transmission housing is cast together with the stub axle housing. The pinion gear is mounted on the spline of the driven cam between roller and ball bearings (take axial loads of the joint).

Peculiarities

On such cars as UAZ "Bukhanka", "Farmer", as well as long modifications of model 3151, civil bridges are installed (in the common people "collective farm"). However, some "bobiks" are equipped with military counterparts. These are new models with the index 316, 3159 and the Bars modification, which is distinguished by an increased track. But as a result of this decision, military bridges (UAZ) are not simple here - they are elongated, geared, with a modified "stocking".

What is the difference between military bridges and collective farm bridges?

First of all, such a bridge differs from a civil one in the presence of final drives. Thanks to this, the vehicle's ground clearance is increased by 8 centimeters (that is, the gearbox is located higher than the standard one). The main pair has fewer teeth, but they are larger. This design significantly improves reliability. The gear ratio of military bridges is 5.38 (= 2.77 * 1.94 - the gear ratios of the main and final drives, respectively) - more "high-torque", but less "high-speed" than conventional bridges.

The machine becomes more high-torque for ascents, is able to easily carry heavy loads on itself (or on a trailer). However, this mechanism is not designed for speed. The so-called "collective farm" bridges are faster than their military counterparts. And, of course, the differences concern the propeller shaft. If these are military bridges (UAZ), the length of this element is 1 centimeter shorter. Therefore, when replacing or repairing a shaft, it is necessary to specify the bridge for which it is designed. The recommended wheel size is 215 x 90 with a diameter of 15 inches.

Advantages of the UAZ military bridge

So, the first plus is ground clearance. He, unlike civilian models, is 30 centimeters. "Kolkhoz" UAZs have a clearance of 22 centimeters. The second plus is the increased torque. This is a huge plus if you are going to transport large loads or drag a trailer with you. Due to the large size of the teeth, they do not wear out as often as on civilians (applies to the main pair). Also, military bridges (UAZ) are distinguished by a more even distribution of the load between the onboard and main transmission. Well, the last thing that the owner of such bridges can boast of is the presence of a limited slip differential. This is learned when driving off-road (in fact, the UAZ was intended for him). If the car is stuck in the mud on only one side, you will not have slipping, as on civilian bridges (the left wheel moves, but the right one does not).

Cons of a military bridge

Now we will list the shortcomings of this mechanism, because of which disputes arise between the "uazovods". The first drawback is the increased weight. Civilian bridges are lighter, and therefore fuel consumption is lower. Also, there are fewer complex parts in their design, so the "collective farmer" is more maintainable. And spare parts for the "warrior" are more difficult to find (the same gearbox of the military bridge). UAZ with a civil bridge is more comfortable to ride and high-speed. Also, due to the use of spur gears in military analogs, the operation of such a design is more noisy. Also on civilians, you can install a spring suspension and disc brakes. It is impossible to put all this on military bridges (including UAZ-469). Oddly enough, but civilian mechanisms are more unpretentious in service. Take oil, for example - military bridges have a lot more lubrication points.

Owner reviews

Some motorists, in response to the statement “military bridges are better than civilian ones”, agree only 50 percent. As for the increased ground clearance, these centimeters do not offer much of an advantage. Those who need to, lift the suspension and install more "evil" wheels. As a result, the ground clearance can be increased by 1.5-2 times - it all depends on the desire and skills of the car owner. Drivers also complain about increased noise. Still, army bridges make themselves felt, even if the vehicle is used for civilian purposes. And sometimes, to get to your destination (hunting or fishing), you have to listen to this "melody" for several hours. This is especially noticeable on asphalt surfaces. For many, flow and dynamics are important - with military bridges, you can simply forget about these two factors. Reviews from car owners say that the car hardly picks up speed more than 60 kilometers per hour, while fuel consumption increases by 10-15 percent. In terms of maintenance, reviews point to an oil leak problem. It starts at the final drives. Therefore, advice for those who are going to take a UAZ: immediately change the oil. Nobody ever thought about this seemingly simple operation. People buy this car and do not even think about the fact that periodically it is necessary to change the oil in the engine and gearbox, not to mention the bridges. Of course, this is a military machine and it is very difficult to "kill" it, but if you ride for 10 years on one oil in a gearbox, the machine is unlikely to thank you. As for cross-country ability, reviews note the special design of military bridges. They are made in the shape of a ski. Therefore, to get stuck on military bridges, you need to try hard. And they are more durable in terms of resource, due to the use of other teeth. Also, reviews note the absence of locks. You cannot put disc brakes on the UAZ-469. Military bridges "do not digest" them. But, along with this, there is the possibility of installing wheels over 30 inches. If civil bridges are used, the constant velocity joints, axle shafts and the main pair have to be reinforced.

About the problem of consumption and not only through the eyes of car owners

With regards to noise: judging by the reviews, this is a very subjective opinion. Someone scolds military bridges for noisy, but for someone it does not matter - "as they made noise before, so now." Regarding fuel consumption - with a properly adjusted intake system, such an UAZ will consume a maximum of 1.5 liters more than its civilian counterpart. In addition, some car owners note the lack of spare parts, since military bridges have not been produced for several decades. If it is possible to find something, it will only be disassembled, and it is not a fact that what was found will be in good condition. On the other hand, the bridge is not a "consumable" like a filter, rubber and oil. And you don't have to buy gears and other spare parts every day.

Off road

If your priority is offorud, it is definitely better to put a military bridge. But if you often drive on normal asphalt surface, civilians are definitely chosen for such purposes. It is not in vain that collective farm bridges are installed on all police "bobiks". In urban areas, comfort and dynamics are a priority. Conclusion Thus, the type of bridge is determined by the further purpose of the car - it will simply go hunting and fishing or be prepared for a full-fledged off-road. But it is worth noting that even a civilian UAZ on "stock" tires is able to get through the ford. But you shouldn't use this opportunity on a daily basis: even on civilian bridges one can feel "military echoes" - a frame structure, a rigid spring suspension. So, we found out how military bridges (UAZ) are arranged, what are their advantages and disadvantages compared to civil ones. As you can see, you need to initially know for what purposes it will be used.

Price

The price tag, to put it mildly, is very serious - if you take the new ones produced by Bars (excellent, by the way, Russian-made bridges), then the purchase of a complete new set (front and back) will cost 140,000 rubles. Plus, the installation will result in a decent amount. They differ from the usual with a wider track (1600mm), and also in that the front axle goes under the springs. As the people note, it will be softer and more comfortable to ride on such bridges. Therefore, it is better to immediately look for a car on the warriors, since there are more than enough ads on Avito. There you can also find just bridges for 30-50k rubles, here you really need to look at the condition, you can take it cheaper, in excellent condition from conservation, or you can even more expensive, rusty. All the same, during installation, they will need to be configured, sorted out. For work - for the installation of 1 bridge, the price tag is 5-7 thousand rubles.

Diagram (device) of a military bridge

Drive axles with final drives. The middle part of the driving axles with final drives differs from the above-described bridges in the smaller differential size and cantilever installation of the main drive pinion on two tapered roller bearings 5 ​​and 7 (Fig. 1). Rice. 1 Rear axle of the car UAZ-3151 1 - crankcase cover 2 - differential bearing 3, 13 and 49 - adjusting shims 4 and 23 - sealing gaskets; 5 and 7 bearings of the drive gear, 6 - an adjusting ring, 8 and 42 - cuffs, 9 - flange. 10 - nut, 11 - dirt deflector. 12 - support washer, 14 - spacer sleeve, 15 - adjusting ring for the position of the drive gear, 16 - drive gear, 17 - satellite, 18 and 57 - half-shafts; 19 - final drive housing; 20 and 29 - oil deflectors, 21 - ball bearing, 22 and 26 - retaining rings, 24 - final drive housing cover, 25 - roller bearing, 27 - brake shield, 28 - brake drum, 30 - wheel bolt, 31 - trunnion , 32 - hub bearing, 33 - gasket, 34 - lock washer, 35 - drive flange, 36 - nut and locknut of the hub bearings, 37 - bearing thrust washer, 38 - bushing; 39 - the driven shaft of the final drive, 40 - thrust rings of bearings, 41 - gaskets; 43 - driven shaft bearing, 44 - driven final drive gear, 45 - driven shaft bearing mounting nut, 46 and 50 - drain plugs, 47 - final drive gear, 48 and 56 - satellite boxes, 51 - crankcase, 52 - washer half-axle gears, 53 - half-axle gear, 54 - satellites axle, 55 - driven gear of the main drive Between the end of the drive gear and the inner ring of the large bearing, an adjusting ring 15 of the drive gear is installed, and between the inner rings of the bearings there is a spacer sleeve 14, an adjusting ring 6 and adjusting gaskets 13. The bearings of the drive gear are tightened with the flange mounting nut 10. The final drives of the rear driving axle are located in the crankcases, which are pressed by their necks onto the outer ends of the half-axle housings and secured with electric rivets. The pinion gear 47 is installed at the spline end of the half-shaft 48 between the ball bearings 21 and 25 roller bearings. The ball bearing is secured by a retaining ring 22 in the final drive housing. An oil deflector 20 is located between the crankcase and the ball bearing. The roller bearing is installed in a removable housing, which is attached to the crankcase drain with two bolts. The inner ring of the roller bearing is fixed on the axle shaft by a retaining ring 26. The driven gear 44 of the final drive is centered on the shoulder of the driven shaft 39 and is bolted to its flange. The driven shaft rests on the bushing 38 and the roller bearing 43, which is fixed to the shaft by a nut 45, which is punched out after being tightened into the shaft groove. The driven shafts of the right-hand side drives and the bearing retaining nuts have a left-hand thread. To distinguish the nuts with a left-hand thread, they have an annular groove, and the driven shafts have a blind hole dia. 3 mm at the end of the shaft. With the wheel hubs, the driven shafts of the rear final drives are connected by splined flanges 35. The final drives of the front drive axle of the UAZ are located in the pivot pins (Fig. 2, the axle diagram) Rice. 2 Swivel pin of the front axle of the UAZ-3151 vehicle 1 - rubber cuff in a metal casing, 2 - ball bearing, 3 - constant velocity hinge, 4 - gaskets, 5 - grease nipple, 6 - king pin, 7 - king pin pad, 8 - pivot pin housing, 9 - king pin bushing, 10 - ball bearing, 11 - final drive shaft, 12 - hub, 13 - air flange, 14 - clutch, 15 - retainer ball spring, 16 - protective cap, 17 - clutch bolt, 18 - trunnion, 19 - lock nut, 20 - support washer, 21 - drive gear, 22 - locking pin, 23 - thrust washer, 24 - collar, 25 - support washer, 26 - axle shaft casing, 27 - rotation limit bolt, 28 - wheel rotation limit stop, 29 - the lever of the pivot pin, I ... III, and - the same as in fig. 112 Final drive housings are cast in one piece with pivot housings. The drive gear is installed on the splines of the driven knuckle of the hinge between the ball and roller bearings and is secured together with the roller bearing with a nut 19, which, after tightening, is expanded into the groove of the shaft. The ball bearing is installed in the journal housing in a cage with an outer shoulder that takes axial loads of the hinge through the bearing. At the outer ends of the driven shafts of the front final drives, devices are installed that allow you to connect or disconnect, if necessary, the shafts with the hubs of the front wheels.

UAZ on military bridges (video)