UAZ Patriot front axle maintenance. Where is the front axle on the UAZ Patriot located and how is it constructed?

The UAZ Patriot has high off-road performance thanks to all-wheel drive. The front axle of the UAZ Patriot is plug-in.

Torque is transmitted to the bridge using a transfer case.

Front axle structure of UAZ Patriot

The front axle of the UAZ Patriot car consists of:

  • Gearbox;
  • Housings;
  • Two axle shafts;
  • Axle shaft housings;
  • Steering knuckles;
  • Brackets for mounting springs and shock absorbers.

Gearbox

The front axle gearbox of a car consists of a main gear and a cross-axle differential. The main gear is made in the form of two gears. The drive gear is small and mounted on the drive shaft. The driven gear is increased in size, which reduces the torque transmitted to the wheel mechanisms. The gear teeth are angled. When the unit operates, the gear teeth do not hit each other. This reduces the noise level while the vehicle is moving.

An inter-axle differential is installed inside the driven gear of the front axle gearbox. When turning a car, it allows the wheels of the same axle to rotate at different speeds. The cross-wheel differential is made in the form of bevel gears mounted on two axles. The splined part of the axle shafts is included in the cross-axle differential mechanism.

Steering knuckles

A distinctive feature of the front axle is the presence of steering knuckles. They are necessary to drive a car. To transmit torque to the wheel mechanisms, regardless of their angle of rotation, the manufacturer equipped the axle shafts with CV joints.

REFERENCE: Unlike previous models of the Ulyanovsk Automobile Plant, the UAZ Patriot has a greater angle of rotation of the wheel mechanisms. This is achieved by installing ball joints instead of a pin mechanism.

Frame

The design of the front axle of the UAZ Patriot implies the presence of an all-metal housing that forms the gearbox housing. To ensure tightness, the gearbox housing is closed with a lid. It is installed with bolts. A gasket is installed at the junction of the cover and the gearbox housing. On the side of the wheel mechanisms, axle shaft housings are pressed into the gearbox housing.

ATTENTION: To avoid the occurrence of excess pressure in the front axle crankcase as a result of increased temperature, lubrication, the manufacturer has installed a breather valve. It communicates the axle housing with the atmosphere, preventing dust and contaminants from entering the mechanism.

How to turn on and off the front axle on a UAZ Patriot

The front axle on the UAZ Patriot is engaged by the transfer case. The manufacturer installed two types of transfer cases on the model. Older versions are equipped with mechanically controlled valves.

The front axle is engaged on a mechanically controlled transfer case using a lever installed in the car interior between the driver and passenger seats. The lever mechanically moves the transfer case rods.

Newer versions of the car are equipped with an electronically controlled transfer case.

The transfer case control unit turns on the electric motors. Electric motors move the rods to the required position.

To turn on the front axle on a UAZ Patriot you need to:

  • disengage the clutch. To do this, depress the clutch pedal installed in the cabin;
  • After disengaging the clutch, set the lever or regulator to the required position;
  • After releasing the clutch pedal, the front axle of the car will be engaged. Disabling the axle drive should be done in reverse order.

Possible malfunctions and their causes

The design of the front axle is reliable and unpretentious to operating conditions. Most malfunctions that arise during the operation of a car can be fixed by a person with minimal technical knowledge. Below are the most common faults that require unit repair. You can also read about.

The presence of grease drips indicates a violation of the crankcase seal. The cause of lubricant leakage may be a failure of the gaskets or wear of the seals. If a malfunction is detected, it is necessary to replace worn gaskets or seals.


When installing, the gaskets must be treated with sealant.

Increased noise

Loud noise during operation of the unit may indicate wear of the gears or bearings. To troubleshoot problems, you will need to disassemble the unit. Failed parts must be replaced with new ones.

Deterioration of lubricant quality

The cause of strong noise during operation of the unit may be poor quality of lubricant. It is necessary to regularly change the lubricant in the gearbox housing. Regular use of the vehicle for off-road driving or fording can cause water to enter the crankcase. Water prevents the rotating parts of the mechanism from being lubricated, which can lead to complete jamming.

To avoid failure of the entire assembly, it is necessary to regularly check the quality of the lubricant. When using a car to ford, the breathing valve is equipped with a rubber hose, the second end of which is led under the hood.

Repair and maintenance of the front axle of the UAZ Patriot

For normal operation of the unit, it is necessary to carry out regular maintenance. To do this, it is necessary to visually inspect the housing for lubricant leaks.


If it is necessary to repair the front axle of the UAZ Patriot, the unit should be disassembled. You can disassemble the front axle without removing it from the car. Disassembly is carried out as follows:

  • Install a car overpass, inspection hole or lift;
  • Immobilize the vehicle by installing anti-roll devices under the wheels;
  • Drain the used lubricant from the crankcase. To do this, you need to prepare a container with a wide neck;
  • Jack up the front axle and install it on specialized supports;
  • Remove the housing cover and the driveshaft;
  • Where to mount the axle shafts;
  • Unscrew the nut securing the drive shaft flange;

After completing these steps, the front axle gearbox components will be available for replacement. Assembly of the unit is carried out in reverse order. To facilitate the repair procedure, it is necessary to use the design diagram of the UAZ Patriot front axle.

From the above it follows that the front axle of the UAZ Patriot improves the vehicle’s off-road performance. The design of the unit makes it reliable and unpretentious to the conditions of use. For normal operation of the mechanism, regular maintenance is necessary.

The UAZ Patriot and Hunter SUVs are equipped from the factory with two drive axles: front and rear. Thanks to the presence of two axles on the UAZ Patriot SUV, its cross-country ability is unparalleled. The front axle, unlike the rear, is steerable. This indicates that the front axle is engaged only when necessary. The bridge that is installed on the UAZ is called Spicer. It was developed back in the 90s, and every year it was improved and supplemented. Today there is such news that Spicer will soon displace the old designs of units that are installed on “loaves” and “goats”. Today we will pay attention to the Spicer front axle of the UAZ Patriot SUV. What it is, features, advantages and method of adjusting the product.

Front axle features

The Spicer axle housing consists of a cast material into which the axle shafts are pressed. The axle housing is closed using a crankcase cover. The transverse plane of the device does not have a connector, which increases reliability and adds rigidity to the structure. Also, the differential and main gear of the Spicer bridge are located in one housing, which determines the high precision of engagement and operation of the device. All these features lead to an increase in the performance of products. Now, in order to service the device, it is enough to remove the crankcase cover and carry out the necessary repairs or replacement of products. Periodic monitoring of the oil level in the system, timely replacement of seals and bearings, as well as elimination of play in gears and differentials - all this is the main criterion for servicing the unit. The Spicer bridge is equipped with new types of joints (CV joints), the feature of which is durability. These hinges require periodic lubrication of the structure, for which CV joint-4 material is used. It is unacceptable to use Litol-24 to lubricate joints. An equally important point is the gear ratio of the Spicer bridge. Devices are available with two front axle ratios for the UAZ Patriot: 4.11 and 4.62. Axles with a value of 4.11 are installed on a UAZ Patriot SUV with a ZMZ 409 gasoline engine, and 4.62 on ZMZ 514 diesel units.

Design and diagram of the Spicer front axle

The photo below shows a diagram of the Spicer front axle with digital symbols. Let's look at the main mechanisms that make up the Spicer front axle.

1 - bolt; 2, 33 - spring washers; 3 - driven gear; 4, 24 - axle shafts; 5 - adjusting ring; 6, 22 - bearings; 7 - spacer sleeve; 8 - outer race of the outer roller bearing; 9 - roller bearing; 10 - thrust ring; 11 - oil seal; 12 - reflector; 13- flange; 14 - washer; 15 - nut; 16 - axle housing; 17 - adjusting ring of the drive gear; 18 - outer race of the internal roller bearing; 19 - internal roller bearing; 20 - oil deflector ring; 21 - shaft with drive gear; 23 - differential bearing adjusting nut; 25, 39 - right and left parts of the differential housing; 26 - bolt; 27, 40 - support washers for axle gears; 28, 43 - axle gears; 29, 45 - axes of differential satellites; 30, 41, 44, 46 - differential satellites; 31, 38 - differential bearing covers; 32 - retainer for the differential bearing adjusting nut; 34, 36, 37 - bolts; 35 - main gear housing cover; 42 - main gear housing cover gasket.

Advantages of the Spicer Bridge

The UAZ Patriot SUV is equipped with a wide type front device. The advantages of this design are the following: Increasing the track, which has a positive effect on the stability of the vehicle both on and off-road. The track was increased to 160 cm. This also had a positive effect on the possibility of increasing the steering angle of the front wheels to 32 degrees. In this case, the SUV received better maneuverability on the road and abroad. The strength class of the steering knuckles has been increased, thereby reducing the frequency of lubrication and repair work. Thanks to the presence of a new suspension, the UAZ Patriot received better handling and stability.

Thus, these advantages indicate that the SUV has high off-road stability, as well as cross-country ability, which is important for such a unit.

Possible faults

Constant increased noise when the front axle is operating. 1 . Worn or incorrectly adjusted differential bearings. 2 . Incorrect adjustment. damage or wear of gears or bearings of the gearbox. 3 . Insufficient amount of oil in the axle housing. 1.1 . Replace worn parts, adjust differential bearing. 2.2 . Determine the gearbox malfunction, repair or replace it. 3.3 . Restore the oil level, check for oil leakage through the front axle crankcase seals. Noise when accelerating and braking the car 1 . Incorrect adjustment of the main gear gear engagement. 2 . Incorrect side clearance in the meshing of the final drive gears. 3 . Increased clearance in the drive gear bearings due to a loose flange nut or worn bearings. 1.1 . Adjust the engagement. 2.2 . Adjust the gap. 3.3 . Adjust the clearance and replace the bearings if necessary. Knock when starting to move the car 1 . Wear of the hole for the pinion axle in the differential box 1.1 . Replace the differential box and, if necessary, the pinion shaft.

Replacing the drive gear shaft seal of the front axle reducer

Replace the oil seal if oil leaks are detected from under the gearbox flange.

An oil leak can also be caused by excess oil in the crankcase or a clogged breather.

You will need: 27mm socket, wrench, flat blade screwdriver, torque wrench. 1 . Brake the car with the parking brake and place chocks under the rear wheels of the car. Raise and place the front of the car on supports. 2 . While holding the bolts from turning, unscrew the four nuts securing the propeller shaft to the front axle gearbox flange, remove the bolts and move the shaft to the side. 3 . Unscrew the nut securing the front axle drive shaft flange and remove the flange with the reflector. 4 . Using a screwdriver, remove the oil seal from the axle housing. 5 . Using a suitable size mandrel, press the new oil seal into place. 6 7 . Tighten the front axle drive shaft flange nut by turning the shaft past the flange until the bearings are seated.

Removing and installing the wheel release clutch

The wheel release clutch is removed to replace it or gain access to other units. You will need: 14mm wrench, flat-blade screwdriver, outer circlip remover. 1 . Remove the three mounting screws. 2 . and remove the coupling cover. 3 . Remove the six bolts securing the wheel release clutch and remove it. 4 . Remove the three screws securing the coupling cover to the flange... 5 . And remove the cover. 6 . Using a puller for the outer retaining rings, loosen the retaining ring by prying it up with a screwdriver. 7 . Remove the retaining ring and the washer installed underneath it. 8 . And remove the spline bushing from the flange. 9 . Install the parts in the reverse order of removal.

Removing and installing the axle shaft

The axle shafts of the front wheels are removed for replacement in case of damage, failure of constant velocity joints (CV joints) or to gain access to other units. 1 2 . Remove the brake disc. 3 . Remove the wheel speed sensor. 4 . Remove the bolts securing the axle to the steering knuckle and remove the axle assembly with the hub and wheel release clutch. 5 . Remove the axle shaft assembly with CV joint from the axle housing. 6 . Before installing the axle shaft, apply clean CV joint-4 grease to the constant velocity joints. 7 . Install the parts in the reverse order of removal. Replacing the front axle axle seal Replace the oil seal if oil leaks are detected from the steering knuckle. You will need a flat blade screwdriver.

An oil leak can also be caused by excess oil in the crankcase or a clogged breather.

1 . Brake the car with the parking brake and place chocks under the rear wheels of the car. Raise and place the front of the car on supports and remove the wheel. 2 . Remove the steering knuckle and secure it in a vice. 3 . Using a screwdriver, remove the oil seal from the steering knuckle ball joint. 4 . Install a new oil seal by carefully pressing it into the ball joint using a mandrel of suitable diameter, and lubricate the working edge of the oil seal with Litol-24 grease.

You can use an old oil seal as a mandrel.

5 . Install the parts in the reverse order of removal.

Removing and installing the front axle final drive

The main gear is removed for repair or replacement. You will need: keys “10”, sockets “19”, “27”. 1 . Brake the car with the parking brake and place chocks under the rear wheels of the car. Raise and place the front of the car on supports, remove the wheels. 2 . Remove the plug and drain the oil from the front axle. 3 . Remove both axle shafts. 4 . Disconnect the left tie rod end from the steering arm and move the tie rod to the side. 5 . While holding the bolts from turning, unscrew the four nuts securing the propeller shaft to the front axle gearbox flange and move it to the side. 6 . Remove the ten bolts securing the final drive housing cover. 7 . And remove the cover. 8 . Clean the mating surface from the old gasket. 9 . Unscrew the nut securing the front axle drive shaft flange. 10 . Remove the flange with the reflector. 11 . Remove two bolts securing the differential bearing caps, remove the caps and remove the differential assembly with the driven gear, and then the shaft with the drive gear assembled with the rear bearing. 12 . Remove the flange seal. 13 . Remove the front pinion shaft bearing from the front axle housing. 14 . Press the outer races of the front and rear pinion shaft bearings out of the crankcase. 15 . Install the parts in the reverse order of removal. 16 . Adjust the main gear. 17 . Fill the front axle housing with oil.

Dismantling and assembling the front axle differential

You will need: keys “14”, “17”. 1 . Remove the differential and driven gear assembly. 2 . Press the bearings off the differential case axle. 3 . Remove the ten bolts securing the driven gear to the differential and remove the driven gear. 4 . Remove the eight differential case cup bolts and separate the cups. 5 . Remove the differential gears and pinions with axles. 6 . Reassemble the differential in the reverse order of removal.

Before assembling the differential, lubricate the axle gears, pinions, thrust washers and pinion axles with transmission oil.

7 . Tighten the differential box driven gear mounting bolts evenly, screwing in each bolt one turn, alternately moving from bolt to bolt along the diameter.

As many people know, Russian roads are not distinguished by their quality, not to mention off-road conditions. To move around in such conditions. You need a car with excellent driving properties. These are exactly what UAZ-Patriot has.

A little about the UAZ car

"UAZ-Patriot" has proven itself well on Russian off-road terrain. Moreover, the scope of application is very wide, ranging from agricultural vehicles to military vehicles capable of performing assigned tasks in extreme conditions. The Patriot's design is perfect for both everyday use and for outings on impassable trails. Moreover, the driving characteristics allow you to get into places where passenger cars have never even dreamed of. You can easily go fishing or hunting with this car, and if bad weather befalls during the event, you can easily get out of any trouble by turning on the front-wheel drive. The performance of a UAZ vehicle depends on the quality of spare parts. The front axle is no exception. If low-quality parts are used during repairs, complete failure is possible.

UAZ bridge: purpose and characteristics

The bridge is a beam between the wheels and ensures their reliable fastening. It is equipped with elastic parts, with the help of which loads are absorbed during movement. Since the UAZ-Patriot is intended for operation in difficult conditions, the bridge must be of increased strength. In addition, almost the entire performance of the car depends on the drive axle, since due to the failure of at least one link, further operation of the car is impossible.

The bridge consists of:

  • Differential.
  • The main couple.
  • Half shafts.
  • Ressor.

SUVs carry a lot of load, so leaf springs are an integral part, not springs. This is the reason for the excellent cross-country ability of the UAZ. The front axle is a rather complex device and therefore requires timely maintenance.

Types of bridges

Today, there are several types of vehicle axles, some of which are installed on a UAZ vehicle. The front axle is a device that performs a huge number of functions. The cross-country ability depends on it. For certain models, different types of bridges are used:

  1. Managed. In turn, it is divided into split and continuous. In most cases, this is the front drive axle of the car. The split axle serves to transmit torque, resulting in increased maneuverability of the vehicle. The continuous one is equipped with steering knuckles, which makes it possible to control the rotation of the wheels. This type of bridge requires a light and strong beam, the manufacture of which uses forging technology and high-quality steel.
  2. Supportive. In the case when the car has to transport heavy loads, this particular bridge is used. The design provides a supporting device, which takes part of the load upon itself. In some trim levels, the front axle is equipped with a similar supporting element.
  3. Continuous leader. The most complex system, since, in addition to the beam, the device includes a system and axle shafts. With this system, the front wheels have the ability to spin at different speeds. When cornering, the car is more stable and can withstand heavy loads, while the cabin will feel smooth when driving on uneven roads. To withstand mechanical loads, the axle shafts are made of high-quality steel, after which they undergo a hardening procedure.

Common design faults

The UAZ car can handle Russian off-road conditions best. The front axle is a complex system, any malfunction of which will put the car out of further use. Repairing the front axle will cost the owner a significant amount of money, so it is necessary to promptly carry out diagnostics and lubricate the parts of the device.

Main bridge faults:

  • Leakage of oil and grease.
  • Wear of fastening devices.
  • Defects in bearings, teeth, axle shafts.
  • Mechanical damage to the beam.
  • Wear of components.

All malfunctions can occur for various reasons. If a rear-wheel drive car is set to front-wheel drive, then driving on rough roads will damage the transmission. Also, using winter transmission oil in the summer or vice versa will not affect the performance of the car for the better. Tires must be maintained at constant pressure to prevent bearing and shaft defects. Russian off-road conditions will not scare the UAZ car. The front axle needs proper bearing adjustment.

Timely identification of a malfunction will allow the breakdown to be quickly eliminated, preventing more serious consequences. Among SUVs on the market, the leading place is occupied by the UAZ-Patriot, the front axle of which requires periodic maintenance.

Main signs of breakdowns:

  • Extraneous sound.
  • Gradual loss of vehicle control.
  • Increased fuel consumption.
  • Untimely wear of engine and transmission parts.
  • The most dangerous symptom is a wedge when moving. This event requires immediate repair and adjustment of the bridge.

Timely adjustment of the UAZ-Patriot axle will allow you to avoid a large number of malfunctions and keep the car in good condition.

How to disassemble and repair a bridge

Today, UAZ-Patriot is often purchased. The front axle requires constant monitoring and periodic maintenance. It is necessary to adjust the steering knuckles and bearings in a timely manner. Changing the lubricant is also a necessary requirement for the proper operation of the entire system. The main device on which driving performance depends is the front axle (UAZ). The price will depend on the completeness of the device. It varies from 75,000 rubles to 200,000 rubles.

In order to remove the front axle, it is necessary to secure the car in a stationary state, for example, by placing blocks or bricks under the rear wheels. Next, you should disconnect all the brake line hoses, after which we unscrew all the nuts and bolts that secure the shock absorbers, gears, linings and stepladders. The next stage must be approached with all responsibility, since it is the most difficult.

Stages of dismantling the UAZ-Patriot bridge:

  1. The wheels need to be removed.
  2. Disconnect the bipod linkage.
  3. Remove the wheel couplings and brake drums.
  4. Straighten the edges of the lock washer.
  5. Disconnect the inner washer and retaining ring.
  6. Next you need to start disassembling the fists, brake flaps and
  7. We unscrew the ball and steering linkage rod.
  8. We dismantle the gaskets and remove the steering knuckle housing.

After the front axle is completely disassembled, it is necessary to wipe all components and find the fault. Next, it needs to be eliminated. You can only rely on the UAZ for off-road driving. The front axle must be maintained in good condition to avoid costly repairs. It is worth considering that the smallest crack can cause a breakdown, so it is better to immediately replace such a part without waiting for it to fail. Because next time you will have to disassemble the entire device again. The front one is disassembled in a similar way. Now this will not be difficult for you.

Switching on the front axle "UAZ-Patriot"

UAZ is a powerful Russian SUV. The car will handle fine on a normal surface, but to drive over bumps, impassable mud and potholes, you need to engage the front axle of the UAZ. How to do it? To do this, you need to check what position the UAZ front axle clutch is installed in. To turn on, you need to turn the hubs clockwise and move them forward. After all the manipulations done, the vehicle’s cross-country ability will increase significantly due to the fact that the front wheels will rotate synchronously with the rear ones. It is worth considering that engaging the UAZ front axle will significantly increase fuel consumption. But the car will become more maneuverable, stable and more controllable. In the case when the front axle of the UAZ is engaged for driving on smooth asphalt, the tires and transmission wear out several times faster, and handling deteriorates noticeably.

In general, there are 2 ways to turn on the hub: manual and automatic. The first method is discussed in detail above, and the second is the most convenient.

It is worth remembering that turning it on and off should be done after the car has come to a complete stop. After the operations performed, you need to make sure that the device is actually turned on, as well as turned off.

Methods for determining front axle deactivation:

  • When driving, pay attention to the behavior of the rear wheels; they should work independently of the front ones.
  • Pay attention to how the car behaves when cornering - the car will drive a little when front-wheel drive is engaged.
  • Well, the most popular and widespread method. It is necessary to ask a third party to see whether the drives are rotating or not. If they spin, it means the clutches are engaged and need to be disengaged.

Preventive maintenance and timely detection of defects

From time to time it is necessary to pay attention to the running parts of the car. This will have a positive effect on operation and reduce the likelihood of car breakdowns.

When carrying out prevention it is necessary:

  • Check the oil level in the crankcase, add or change if necessary. The oil is drained through a special hole at the bottom of the crankcase. But in order to drain the oil completely, you need to open the filler hole by unscrewing the top plug. If necessary, the container must be rinsed.
  • Adjust axial clearances. The presence of a gap between the gearbox transmission and the drive gear bearing will lead to rapid wear of the teeth. This can be determined by shaking the driveshaft mount. To fix it, you need to tighten the nut using a certain force.
  • Clean all visible parts of the bridge, including the safety valve. Clean all dirt deposits with a coarse brush.
  • Check the steering knuckles. You should pay attention to the levers of the fists, or more precisely, to its fastening. Wheel turn stops must always be intact.
  • Check all fastenings. If necessary, tighten the bolts and nuts using wrenches of the required diameter.

The front axle of the UAZ “loaf” has a similar device. He also needs to carry out similar preventive measures.

Suspension tuning

Every car owner sooner or later wonders about improving the performance and technical characteristics of his car. For some, external changes and modifications are important. But for SUV owners, the main task is to improve the suspension.

Activities for tuning "UAZ-Patriot":

  • Strengthening the axles and lowering the gear ratio.
  • To increase suspension travel, it is recommended to replace the rear suspension with a spring one. But it is worth considering that the car will lose a little in maneuverability.
  • Increasing the ground clearance will significantly increase the vehicle's maneuverability. The elevator will help you overcome even the deepest ford.
  • Replacing tires with tires with a wider profile will have a positive effect on the vehicle's ability to navigate difficult terrain.

Let's look at several suspension tuning options in more detail.

The simplest and most inexpensive way is to increase the suspension play by 2 cm. It is necessary to place rubber inserts under the front springs and replace the shackle on the springs. In this case, installation of a Panhard rod is not required. Since the ground clearance is increased, it is possible to install more serious tires.

The next option is to raise the body itself above the frame. In this case, the ground clearance will increase by 5 cm. The method involves installing spacers in the places where the frame and body are attached. It is advisable to use aluminum inserts. At the same time, it is necessary to move all the mounting brackets for the frame and body, and also lengthen the stops so that the body does not move. The bumpers also need to be modified: we put aluminum spacers on the front one, and we move the brackets on the rear one. As a result, the ground clearance is increased, and you can install 275/75 R16 tires. Tuning the UAZ-Patriot suspension must be done with all the necessary tools.

Another option will significantly increase the clearance, which will have a positive effect on the vehicle’s cross-country ability. But the method is quite problematic and complex. In this case, you will need to install a Panhard rod and replace the shock absorber. On the front axle we install a spacer of up to 10 cm on the bumper cup. We drill holes on the machine in order to change the angle of inclination of the kingpin. We change the standard inclination of 3 degrees to nine. This will prevent the car from losing stability on the road. In addition, you can install dampers on the bipod linkage, perfect for Mercedes Gelenwagen. You also need to install a longer strut on the axle stabilizer. This method will be quite expensive, but the characteristics and throughput of the machine will increase significantly.

Axle adjustment

Typically, all adjustments are carried out at the manufacturer's factory and are not required when using the vehicle. When the axle is rebuilt or the bearings are faulty, adjustments are sometimes made.

Adjustment without replacing bearings:

  • Unscrew the axle shafts, remove the crankcase cover or gearbox (depending on the type of axle).
  • In the differential, namely in the bearings, set the gap to 0.15 mm using adjusting nuts.
  • Set the side gap to 0.20 mm. By turning the gear, we take measurements at at least 6 points.
  • If the side clearance needs to be increased, turn the adjusting nut and the opposite nut by the same number of turns. To reduce the gap, we perform the same operations exactly the opposite.
  • We compress the bearing in the direction of the axis to adjust the preload. The compression level depends on the mileage of the car.
  • We are assembling the bridge. The front axle of the UAZ 469 is adjusted in a similar way.

Adjustment with replacement of bearings

  • Unscrew the axle shafts, remove the crankcase cover or gearbox (depending on the type of axle)
  • Remove the cover from the bearings.
  • Using a dynamometer, measure the friction torque of the gear.
  • Remove the rings from the differential box and install new ones.
  • Install new bearings.
  • Replace and secure all previously removed covers. It is advisable to apply force for a more reliable fixation. The bolts must be lubricated with a special sealant.
  • In order to increase the moment of resistance to rotation, it is necessary to tighten the adjusting nuts one by one until the optimal value of resistance to rotation is achieved equal to 200-250 N.
  • Install all previously removed parts, including the axle shafts.
  • Tighten all fasteners securely.

Results

As can be seen from the article, the most Russian SUV is, of course, the UAZ. The front axle is one of the most basic parts. The car will not be able to function normally if there is a malfunction of the chassis. "UAZ-Patriot" is a car for roads with poor cross-country conditions. If it won't do the job as an SUV, there's no point in spending the extra cash. Because any passenger car will handle just fine on smooth asphalt. In order for the UAZ to meet all requirements, it is necessary to keep the chassis in good condition. Perform preventative and maintenance services in a timely manner. It is also necessary to modify bridges and increase ground clearance without causing harm to the car. If you have certain mechanic skills and the information provided in this article, you can perform all the manipulations yourself. Repairing the front axle of a UAZ will cost a considerable amount, so it is better to prevent malfunctions.

A UAZ Patriot all-wheel drive car has two drive axles, and the front one is not connected through a clutch or electronic systems. The design provides for the selection of torque through the transfer case and further to the final drive of the axle. Various photos and diagrams of both the front and rear axles can be viewed not only in catalogs, but also on websites on the Internet.

Design features, device

Car on a lift

There are no big differences in the design of the drive axles. The front axle of the UAZ Patriot has a single-stage design. This is expressed in the transmission of torque through the main gear and differential.

The front hollow beam houses two axle shafts, which receive rotation from the driven gear of the main drive and transmit it to the hub. The axle shafts transmit rotation through CV joints.

You can engage the wheels when using the front axle by turning on special couplings, also called hubs.

Possible malfunctions and their manifestations

Despite its simplicity, due to high load or violation of operating rules, problems may occur that are easy to diagnose.

The following malfunctions are typical for the front axle:

  1. Increased noise during bridge operation. This device problem may be caused by:
    • violation of adjustment and wear of differential bearings;
    • improper adjustment of bearings, worn out gears in the final drive gearbox design;
    • low oil level in the axle housing.
  2. The increased noise level during car acceleration and braking is due to:
    • violation of the engagement or clearance of the main gear gears;
    • increasing clearances in bearings due to lack of adjustment or as a result of wear.
  3. The knocking sound when the car starts to move is caused by wear on the pinion shaft in the differential mechanism.
  4. Lowering the oil level:
    • loss of elasticity by the front axle oil seal;
    • wear of the inner joint seals;
    • Poor fastening of the bridge cover.
  5. Noise while driving when cornering will be due to wear on the parts of one or more constant velocity joints.

It should be noted that the malfunctions are similar to those that can occur in the rear axle parts. Given the simple structure of the bridge, repair difficulties, as a rule, do not arise.

Sequence of actions for different types of repairs


Bearing adjustment

In order for the UAZ Patriot bridge to operate reliably for a long time, after completing the necessary repair steps, it is necessary to correctly adjust the bearing clearances. Operations are performed in a specific order.

  1. An adjusting ring is selected for the bearing of the main gear drive shaft. The thickness of the ring is determined by the difference in length from the imaginary line of the center of the axle shafts to the outer edge of the bearing with the thickness of the bearing itself.
  2. After installing the adjusting ring and drive gear, check the torque when rotating the shaft. It should not exceed 1.0-2.0 Nm.
  3. Using a similar algorithm, an adjusting ring for the driven gear is selected.
  4. When installing the differential, adjust the bearing clearances of the axle shafts using adjusting nuts.
  5. After installing the mechanism, the output torque should be no more than 0.42 Nm when rotating by the drive gear.
  6. A necessary operation to monitor the correctness of the adjustments made is to check the absence of backlash, as well as the engagement of the gears of the mechanism along the contact patch. To do this, rotate the driven gear, controlling the point of contact of the teeth.

Bridge tuning

The engagement should not be superficial or excessively deep, for which purpose adjusting rings of the required thickness are installed under the bearings.

The Ulyanovsk-made UAZ Patriot is equipped with all-wheel drive, driven by front and rear axles. The rear axle belongs to the main drive, and the front axle is activated when it is necessary to overcome various kinds of obstacles. Let's pay attention to the front axle of the UAZ 3160 Patriot SUV: its features, how to repair and replace the component parts of the device.

The front axle of the UAZ 3160 Patriot is a device that transmits torque from the transfer case through the main gear and differential to the wheels.

It has the appearance of a hollow beam in which two axle shafts are placed. The axle shaft is an intermediate link that performs the function of receiving torque from the driven gear and transmitting it to the hub. The hollow beam is called a crankcase. The transmission of torque is carried out due to elements such as. You can learn more about them from the material on this portal.

As mentioned above, the front axle is activated only when the need arises. To activate it, you need to turn on the ones located on the axles of the front wheels. These couplings are also called hubs, and they are installed independently after purchasing a new car. Below is a diagram of the front axle of the UAZ 3160 SUV, which shows the main structural elements: gears, differential, etc.


As you can see, the structure of the front axle is quite complex, so it is very important to pay attention to its timely repair. Actually, let’s pay attention to this issue and consider how to repair a unit from a UAZ 3160 with your own hands and in what sequence it is carried out.

Repair

Let's look at the main types of repairs to the front axle on a car, so first let's find out what is needed to replace the oil seal. The oil seal is designed to seal rotating joints of bridge parts. Once a seal fails, it cannot be repaired, but only replaced. It is not difficult to find out that the oil seal requires replacement; when you discover an oil leak from the bridge, you can begin repair work. To replace the drive gear oil seal (shank), follow these steps:

  1. The car is installed on the inspection hole and fixed in a stationary state. After this, the front part of the car rises until the wheels come off. The oil must be drained from the bridge by unscrewing the drain plug.
  2. Initially, the driveshaft is disconnected from the flange. The flange and propeller shaft are joined using four coupling bolts, which must be unscrewed. After unscrewing, the shaft should be moved to the side.
  3. The flange is dismantled together with the reflector, after which you can see where the shank seal is located.
  4. The shank seal is removed using a screwdriver, and tubes of the same diameter are used to press in a new product.

At this stage, the drive gear shank seal has been replaced and now it is necessary to install all the removed parts in their original places.

If the front axle differential requires repair, the process is performed as follows:

  1. Initially, the differential is removed from the car, after which it is directly repaired.
  2. The axle bearings are pressed out.
  3. The driven gear is dismantled.
  4. The differential cup is disconnected.
  5. Gears and satellites are removed;
  6. After the required parts have been replaced, the differential is assembled in the reverse order of removal, and if necessary,

The differential is a device that serves to redistribute torque to all wheels depending on the trajectory of the unit. Thus, the differential is an integral unit of the device, without which its operation would be impossible.

Removing the front axle

Although the front axle is not the main drive, without it the UAZ Patriot SUV will be an inferior rogue. Therefore, it is very important to diagnose and repair it in a timely manner. After all, even if the device is not in use, it still requires attention. If the product requires repair or replacement, it must be removed from the vehicle. Features of removing the device consist of the following steps:

  1. The front wheels are being removed.
  2. The bipod rod is disconnected.
  3. The wheel couplings and brake calipers are removed.
  4. The inner washer and retaining ring are disconnected.
  5. The knuckles, brake system flaps and hubs are dismantled.
  6. The steering linkage and ball joint are unscrewed.
  7. The gaskets are dismantled and the device crankcase is removed.

When the crankcase of the product is removed, we proceed to disassemble the product and carry out its repair. If the crankcase is damaged, it must be replaced. The crankcase is an important part in which the functioning of the unit is determined.

It is important to know that if the crankcase has been damaged even to a minor extent, then special attention should be paid to the impact site. After all, even a microcrack can become a serious reason for failure of the front axle of the UAZ 3160 Patriot.

To summarize, we note that the unit (bridge) of the UAZ 3160 SUV discussed in the article is one of the main parts of the entire vehicle. After all, if the front-wheel drive is faulty, there is no point in operating such a rogue as the Patriot. Therefore, the only correct solution is to control the components and parts of the SUV in order to prevent their failure.

You can check your BMR and if you need to reduce it!