Dimensions of the front axle UAZ Patriot. Where is the front axle on the UAZ Patriot located and how is it constructed? Removing the front axle

Design features Possible malfunctions of the front axle, their causes and solutions Replacement of the drive gear shaft seal of the front axle reducer Removing and installing the wheel release clutch Removing and installing the axle shaft Replacing the front axle axle shaft seal Removing and installing the front axle final drive Dismantling and assembling the front axle differential Adjusting the bearing ...

Rice. 6.4. Main gear: 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 for...

Replace the oil seal if oil leaks are detected from under the gearbox flange. Note Oil leaks can also be caused by excess oil in the crankcase or a clogged breather. You will need: a 27mm socket, a wrench, a flat-blade screwdriver, a torque wrench. 1. Brake the car with the parking brake and place chocks under the rear wheels of the car. Raise...

The wheel release clutch is removed to replace it or gain access to other units. You will need: a 14mm wrench, a flat-blade screwdriver, and an outer circlip remover. 1. Unscrew the three fastening screws... 2. ...and remove the coupling cap. 3. Remove the six bolts securing the wheel release clutch and remove it. 4. You...

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. 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 brake disc (see “Replacing...

Replace the oil seal if oil leaks are detected from the steering knuckle. You will need a flat blade screwdriver. Note Oil leakage 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, remove the wheel...

The main gear is removed for repair or replacement. You will need: “10” keys, “19”, “27” sockets. 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 (see “Changing the oil in the front axle...

6.5.9 Dismantling and assembling the front axle differential

You will need: keys “14”, “17”. 1. Remove the differential assembly with the driven gear (see “Removing and installing the front axle final drive”). 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...

Adjust the main drive bearings in the following order. Rice. 6.4. Main gear: 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 – shai...

The front axle is removed to replace its beam or when all parts are completely worn out, when partial repairs become impractical. You will need: keys “17”, “19”, “22”, “24”, “27”, suspension spring ties. 1. Brake the car with the parking brake, place chocks under the rear wheels of the car and jack up the front of the car. 2. Loosen the nuts securing the front...

UAZ Patriot bridges

their design and maintenance is quite an interesting topic among UAZ drivers.
Many people are especially concerned about the UAZ Patriot front axle
, because the front axle is structurally more difficult to repair and install. Today we will tell you more about the bridges of the modern Patriot.

First, a little history of UAZ drive axles and the design of these transmission elements. Initially, the bridges of UAZ SUVs were “military” and “collective farm”; they differed significantly in their design from each other. Among SUV lovers, it is the “military” types of bridges that are valued. But the current UAZ Patriot is equipped with completely different bridges, which have a number of features, although some parts are interchangeable with the old bridges.

Modern Patriot bridges of the “Spicer” type

Now they come with a track increased to 1600 mm. After all, the old bridges were only 1445 mm and were not suitable for the rather wide Patriot. The design has also changed the main gear housing, which is closed with a removable steel cover, and to access the main gear and differential there is now no need to remove and disassemble the axle, you can simply remove the cover.

The design of the front and rear Spicer axles are similar, and we’ll talk about the features below. So, the axle housing consists of a one-piece cast main gear housing, axle housings (stockings) pressed into it and a stamped cover. The absence of a connector in the transverse plane of the bridge gives the structure high rigidity (continuous type of bridge). Placing the main gear and differential in a single housing ensures durability and high accuracy of meshing of the teeth of the main pair.

The Patriot front axle is shown schematically in the first picture at the very top of the article. The main feature of the bridge can be considered the presence of CV joints. After all, the front wheels, in addition to rotating, must also turn. Initially, Weiss-type CV joints were used, but they were abandoned. Due to the design features, the turning angle did not exceed 27 degrees, which affected the vehicle’s maneuverability. Therefore, new CV joints of the “Birfield” type are now being installed, which provide a rotation of 32 degrees and are more durable, due to a more uniform load on the elements of the rotary joint.

Only “CV joint-4” is used as a lubricant for the CV joint of the UAZ Patriot.

, the previously widely used lubricant “LITOL-24” is no longer suitable for these purposes.

The Patriot rear axle can be seen in the schematic image below.

Typically, the Spicer rear axle does not cause problems for SUV owners. The main thing is to constantly monitor the oil level in the axle housing. Because rebuilding the axle or replacing the final drive with differential is a lottery. You can quite easily run into raw metal and then drive around with a constantly humming transmission.

Basic tips for operating Patriot bridges

are quite simple - you should not drive with the front axle connected on a dry, good road, this leads to increased fuel consumption and wear of the transfer case. You should not allow one of the wheels to slip for a long time if you get stuck, this can lead to accelerated wear of the axle. But when driving with an ambient temperature of minus 30, it is better to connect the front axle.

Let us remind you that the serial UAZ Patriot does not have a cross-axle differential lock.

. That is, if the front right wheel is stuck in the mud, and the front left one is hanging in the air, then only the one that is free will rotate. The same goes for the rear wheels. To avoid getting into a stupid situation, real off-road enthusiasts install the inter-wheel lock themselves. Today there are several types of locks to suit every taste and budget.

Off-road vehicles are well known to domestic consumers. The manufacturer equips them from the factory with a pair of drive axles: rear and front. The main difference between them is that the front one is controllable and can be turned on if the need arises. Despite the fact that the UAZ Patriot front axle was developed back in the 90s, it is actively used to this day due to its technical characteristics.

Before you begin to disassemble the device and the reasons for repairing the front axle, it is necessary to dwell on its advantages in operation. Let's dwell on the following points:

Video review of the design of the front axle of the UAZ Patriot:

Description of components and construction diagram

The design of the front axle on the Patriot should begin with a description of the main elements and components. Among them:

• drive shaft and drive gear;
• driven gear with a large number of teeth;
• axle housing;
• roller type bearing;
• flange;
• nut for adjusting differential bearings.

As for the difference in the design of the structures of each of the drive axles, there are no particular fundamental differences here either. At the front axle of the Spicer Patriot, force and torque are transmitted through the differential and final drive. The beam is hollow, and a pair of semi-axles are placed in it, which account for the rotation from the driven gear.

Device, design and maintenance features.

The UAZ Patriot cars , as well as all models based on them, are equipped with front and rear single-stage Spicer-type drive axles with a one-piece crankcase, named after the American engineer Clarence Spicer, author of more than thirty patents and owner of the Spicer Manufacturing Company, now Dana Corporation.

Front and rear axles of the Spicer type began to be installed on the UAZ-3160 and UAZ-3162 Simbir cars, instead of axles of the old design, and from them they were inherited by UAZ Patriot, UAZ Pickup, UAZ Cargo and UAZ Hunter.

Front and rear axles of the Spicer type on the UAZ Patriot, device.

The front axle is combined, simultaneously performing the functions of drive and steered, and is a rigid hollow beam, inside of which the main hypoid gear and differential are located. From the main gear, torque is transmitted to the front hubs through the axle shafts.

The axle shaft is a single part with constant velocity joints (CV joints) of the Rzepp-Birfield type, named after its inventor Alfred Rzepp and the American company Beerfield, which produced it under a patent. It is more compact than the Bendix-Weiss joint on Timken axles, can operate at larger angles and transmit more torque.

Front axle UAZ Patriot
Currently, front axles of the old Timken type design, which are still installed on UAZ cars of the passenger and utility-passenger model range, are also equipped with such hinges. For this reason, they got the name - hybrid bridges.

The rear axle is a rigid hollow beam, at the ends of which the hubs of the drive wheels are mounted on bearings, and the main hypoid gear and differential are located inside. From the main gear, torque is transmitted through the axle shafts to the hub. The front and rear axles have main gears and differentials of similar design.

Rear axle UAZ Patriot

Design features of the front and rear axles of the Spicer type.

Spicer-type axles are largely unified with single-stage axles of the old Timken type; they have the same differential bearings, rear axle axle shafts and almost all parts of the hub units.

The thickness of the driven gear substrate in the new axles was increased by 8 millimeters, this reduced noise and increased the reliability of the main gear. The new differential can be used on old single-stage axles with a split crankcase, provided that a compensator ring is installed on the cup stud.

Currently produced front and rear axles of the Spicer type have a final drive ratio of 4.111 or 4.625. The former are installed mainly on UAZ cars with gasoline engines, and the latter on cars with diesel engines, and all cars starting from the 2015 model year.

UAZ Hunter cars and all models based on it are equipped with so-called narrow axles with a track of 1445 mm, the catalog number of the front axle is 31605-2300011 - the final drive ratio is 4.111, or 31608-2300011 with a gear ratio of 4.625. Rear axle catalog number 31605-2400010-30 - gear ratio 4.111 or 31514-2400010-10 - from 4.625.

The UAZ Patriot, UAZ Pickup and UAZ Cargo vehicles are equipped with wide axles with a 1600 mm track, front axle catalog number 3163-2300011, 3163-2300011-10, 3163-2300011-10, gear ratio 4.111 or 4.625. Rear axle catalog number 3162-2400010-10, 3163-2400010, gear ratio 4.111 or 4.625.

Inspection and maintenance of the front and rear axles of the Spicer type on the UAZ.

Maintenance of the front and rear axles consists of maintaining the required level of transmission oil in their crankcase, it should be at the lower edge of the filler hole, and replacing it in a timely manner.

And also in checking seals, timely detection and elimination of axial gaps in the main gears, periodically cleaning the safety valve, tightening all fasteners and cleaning the magnetic plug from metal particles when changing transmission oil.

To lubricate Bierfield-type hinges, a special CV joint-4 lubricant is used, which should not be placed in the entire internal cavity of the steering knuckle, as before, but only in the hinge itself. The use of other types of grease, including traditional Litol-24, is unacceptable. During operation, adding lubricant to the joint is not required. The internal cavity of the steering knuckle is filled with Litol-24 lubricant.

Adjusting axial clearances in the front and rear axles of the UAZ.

Axial play in the bearings of the drive gear of the main gear is not allowed, since if it is present, rapid wear of the gear teeth occurs and the axle may jam. The presence of axial clearance is checked by rocking the drive gear by the driveshaft mounting flange.

To eliminate the axial play of the drive gear, it is necessary to tighten the flange nut. The nut is cored into the groove of the threaded part of the drive gear and when tightening it will require more force on the wrench. The nut is tightened carefully until the axial play of the drive gear is eliminated, without allowing it to be overtightened, after which it is cored again. If it is not possible to tighten the cored nut, then it should first be loosened by 0.5-1.0 turns, and then tightened until the axial gap is eliminated and cored.

Axial play in the final drive differential bearings is also not allowed. It is checked by rocking the driven gear with the crankcase cover removed. The axial play of the main gear driven gear is eliminated by tightening the differential bearing nut, after first removing the lock plate.

If you find an error, please select a piece of text and press Ctrl+Enter.

Repair of key types of failures of the UAZ front axle

Many types of repairs to the Patriot front axle can be done independently in a garage.

The following simple instructions, which cover the most common types of repair work, will help with this. Let's consider adjusting the bearing clearance, which must be done correctly so that this unit can function for a long time. First, we select the diameter and thickness of the ring, which must exactly match the bearing of the drive shaft from the main gear.

During rotation of the shaft, a torque is measured, the value of which should not exceed 1-2 Nm. In approximately the same way, an adjusting ring for the driven gear is selected. When installing differentials, the gaps must be set using adjusting nuts - this is clearly demonstrated by the repair diagram for the front axle of an SUV. After carrying out the above manipulations, all that remains is to check for the absence of backlash and check the contact areas of the gear teeth.

Another common occurrence is replacing the drive gear seal on the final drive. First, the flange is removed from the machine by unscrewing the mounting bolts, after which access to the oil seal itself is freed. The damaged element is removed from the socket and replaced with a new one by pressing it into its original place.

It is more difficult to dismantle the final drive - to do this, you must first hang the front part of the vehicle. By opening the drain neck, remove the entire volume of lubricant from the system. First, the left and right axle shafts are removed, and then the tie rod end. After disconnecting the cardan drive, the main cover is also removed in sequence. Along with the drive gear, the differential bearing caps are also removed from their places. Next, the drive gear with shaft and bearings are dismantled.

Video advice on repairing the front axle assembly of the UAZ Patriot:

Monitoring and scheduled maintenance

Experienced SUV owners pay special attention to regularly checking the condition of the oil seals. If replacement work is necessary, new oil seals must be lubricated with LITOL-24. The design of the front axle allows such repair work to be carried out as soon as necessary.

The design of the Spicer bridge, which is installed on, is quite simple in design.

Thanks to this, you can carry out both maintenance and repairs yourself, having the basic tools in your arsenal. Long-term operation is always based on regularly scheduled maintenance.

Particular attention should be paid to monitoring the lubricant level in the axle gearbox and replacing it. If you have the slightest suspicion about the appearance of extraneous noise or other symptoms, you should follow the repair work sequences described here.

Video review of the front axle of the UAZ Patriot SUV:

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!

The front axle of the UAZ Patriot, mounted on a spring suspension with additional shock absorbers, is designed for the installation of steering knuckles. The beam design has a gearbox with a differential, which allows you to transmit and distribute torque between the front wheels.

The front axle is equipped with a monolithic cast gearbox housing (Spicer design), in which axle shaft stockings are installed. Due to the absence of a parting line, the rigidity of the structure is increased and the operating conditions of the gears are improved. A cover secured with bolts is used to access the gearbox and differential. The internal volume of the crankcase is used to store a supply of lubricant; drain and inspection holes with plugs are provided. The tension-mounted stockings are intended for installing the beam on the frame and for mounting the front wheel drive axle shafts.

To turn the front tires while simultaneously supplying torque, ball joints (CV joints) of the Birnfield design are used. The joint cavity contains a supply of special lubricant that does not need to be replenished during vehicle operation. The front wheels have a fixed installation angle in the vertical plane; in the horizontal direction, the toe-in angle is adjusted on the stand. The steering knuckles are of a pivot design, the pivot axis is inclined, ensuring the automatic return of the front tires to a neutral position.

Advantages of the Spicer front beam:

• increasing the track to 1600 mm, which increased the stability of the car;
• the angle of rotation of the steering wheels reaches 32°, which has a positive effect on the maneuverability of the vehicle;
• the use of the Spicer beam made it possible to abandon leaf springs in favor of a spring dependent suspension;
• the design of the steering knuckles does not require routine maintenance or replacement of lubricant;
• access to the mechanisms for repair is provided through a removable cover;
• increasing the rigidity of the structure and placing the gearbox and differential in a single housing made it possible to increase the service life of the unit;
• reduction of noise due to the installation of a modernized driven gear (the part can be installed in axles of an old design with a split housing).

Front axle UAZ Patriot Spicer with ABS 37/9 petrol ZMZ-409

Spicer front axle of UAZ-Patriot, UAZ-Hunter cars

The main gear and differential of the front and rear Spicer axles of the UAZ-Patriot and UAZ-Hunter vehicles are similar in design. All instructions for maintenance and repair of the rear axle also apply to the front axle.

The front drive axle of Spicer UAZ-Patriot and UAZ-Hunter vehicles is steerable. To make driving easier, the front steered wheels have camber (not adjustable) in the vertical plane and toe in the horizontal plane. To return the wheels to the middle position, the steering knuckle pins are tilted in the longitudinal and transverse planes. Positive camber is the deviation of the upper part of the wheel from the vertical plane outward.

The camber angle at the Spicer drive axles of UAZ-Patriot and UAZ-Hunter vehicles is = 1° – 30. Wheel camber affects tire wear. With a camber of up to 2°, wear will not be very large. During vehicle operation, due to wear of the pins, bearings and fatigue wear of the bridge beam, positive camber gradually decreases to zero, and then the deflection of the wheels moves towards negative camber, which worsens the steering of the wheels.

Fig.1. Spicer front axle of UAZ-Patriot, UAZ-Hunter cars

As a result of the tilt of the wheels during camber, forces arise that tend to return them in different directions when moving. Lateral wheel slippage occurs, which contributes to tire wear and makes driving difficult. To eliminate the harmful effects of camber, wheels are installed with toe-in. At the same time, the distance between the wheel rims at the level of the front axle in the front is several millimeters less than in the rear.

The longitudinal inclination of the kingpin of the front Spicer drive axle of UAZ-Patriot and UAZ-Hunter vehicles is designed to stabilize the steered wheels in the middle position, but its effect is noticeable only at high speeds with significant centrifugal forces. Measurements of wheel stabilization when the car exits a turn are the stabilizing moment and the angular speed of rotation of the wheel when returning to the neutral position.

Steering knuckle of the front Spicer axle of UAZ-Patriot, UAZ-Hunter cars

In Fig. Figure 2 shows the steering knuckle of the front axle, equipped with Bierfield-type constant velocity joints and spherical pivot units.

Fig.2. Steering knuckle equipped with Bierfield CV joint and Spicer front axle hub of UAZ-Patriot, UAZ-Hunter cars

1 – leading flange with plug; 2, 10, 25 — gaskets; 3 — hub with brake disc; 4 — hub bearings; 5 — wheel mounting bolt; 6 — brake disc guard; 7 – heat-insulating shield of the ABS sensor; 8 - axle; 9 — steering knuckle body; 11 — clamping bushing; 12 — king pin; 13 — king pin insert; 14-bracket for fastening the ABS harness; 15 - spring; 16 - outer sealing ring; 17 — internal sealing ring; 18 - hinge; 19 — ball joint; 20, 28 - thrust washers; 21 – king pin support; 22 - outer race of the oil seal; 23 — overlay; 24 - nut; 26 – impulse disk; 27- cuff; 29 — retaining rings; 30 - lock washer; 31 - nuts; 32 — lock washer

Adjusting the pivot pins of the front axle Spicer of UAZ-Patriot, UAZ-Hunter cars

When servicing the front drive axle Spicer, check and, if necessary, eliminate the play in the kingpin bearings, wheel toe-in and maximum wheel rotation angles, check and tighten the steering knuckle arm fastening.

When inspecting the steering knuckles, pay attention to the serviceability of the wheel rotation limiters, bolts and the reliability of their locking. Adding lubricant to spherical pins and ball joints with Bierfield type joints (see Fig. 2) during operation is not required.

During repairs, the lubricant is replaced. Use only recommended lubricants. (To lubricate Birfield-type constant velocity joints, use CV joints-4, CV joints-4M or imported analogues).

Adjustment of the tightening of the ball pins of the Spicer bridge (see Fig. 2) of the steering knuckle at the factory is carried out with a preload along the common axis of the pins. When operating the vehicle, pay special attention to the tightness of the steering knuckle pins.

When the rubbing spherical surfaces of the liners or pins wear out, the preload disappears and a gap forms along the common axis of the pins. Eliminate this gap by tightening the clamping sleeve 11. Operation of the front drive axle with gaps in the pivot assemblies leads to premature failure of the upper pivot bushing.

Fig.3. Removing the rods, brake mechanism and wheel release clutch of the front drive axle driving Spicer of UAZ-Patriot, UAZ-Hunter cars

1 - bipod thrust; 2.4 - nuts; 3 – steering knuckle lever; 5, 11 - bolts; 6 – leading flange; 8 - screws; 9 – brake disc; 10 - brake mechanism; 12 – steering linkage rod; 13 - ABS sensor; 14 - ABS sensor harness

Under operating conditions, it is most convenient to tighten the clamping sleeve of the lower kingpin of the Spicer bridge:

- unscrew nut 24; - remove cover 23 with gasket 10; - use a special wrench to tighten the clamping sleeve until the gap is eliminated (after hitting the threaded end of the pin with a copper hammer); - by turning the key 10-20°, tighten this bushing to create a preload along the common axis of the pins; -install lining 23 with gasket 10; - tighten nut 24, applying a torque of 80-100 Nm (8-10 kg/cm).

The turning torque of the ball joint 19 (see Fig. 2) (or the steering knuckle housing 8, if the ball joints were not disconnected from the axle housing) in any direction relative to the common axis of the pins should be within 10-15 Nm (1.0-1 .5 kg/cm). If the control parameter is not achieved, then tighten the clamping sleeve again by turning the wrench another 10-20° and tighten nut 24 with the specified torque.

If the steering knuckle of the front axle spicer has been disassembled (replacing liners, kingpins, etc.), then during its assembly it is necessary to adjust the preload along the common axis of the pins and the correct relative position of the ball joint with the steering knuckle body to prevent displacement of the ball joint.

— Lubricate the conical surface and thread of the clamping sleeve, the rubbing spherical surfaces of the kingpin and liner before installation in the unit. — Screw the clamping bushings until the pins stop into the liners on both sides, ensuring that dimensions A and B (Fig. 6) are equal from the ends of the housing 9 (see Fig. 2) of the steering knuckle to the sphere of the ball joint. -Disparities between dimensions A and B are allowed to be no more than 0.2 mm. To obtain sufficient accuracy, measurements of dimensions A and B should be carried out in plane B.

— Alternately increasing the torque by 20-30 Nm (2-3 kg/cm) tighten the clamping bushings with a final torque of 200-250 Nm (20-25 kg/cm). — Fill the cavities above the clamping bushings with lubricant. — Install the linings with gaskets and tighten the nuts with a torque of 80-100 Nm (8-10 kg/cm). The inequality of dimensions A and B (see Fig. 6) should be no more than the above value (0.2 mm). No play is allowed in the pivot assembly.

Enabling and disabling the bridge

Torque is transmitted to the front axle gearbox using a cardan shaft with a splined coupling connected to a 2-stage transfer gearbox. There are 2 types of transfer cases on Patriot cars: mechanically controlled (Russian design) and electrically driven (Dymos gearbox, used since mid-2013).

To control the gearboxes, a lever or a rotary washer located on the central tunnel of the body is used.

1. Press the clutch pedal all the way.
2. Move the gearbox control lever to the required position; the control algorithm is indicated on the plastic knob of the handle. The manufacturer allows the transition to torque transmission mode to 2 axles using direct transmission in the transfer case at speeds up to 60 km/h.
3. Release the clutch pedal and continue driving with active all-wheel drive. To disengage the front axle, you must press the clutch pedal again, and then set the transfer gear lever to the neutral position.

To engage the front axle on machines with a Dymos gearbox, you must turn the washer to the required position. The design of the transmission allows all-wheel drive to be engaged while driving, but if low range is required, the vehicle must be stopped. Then it is necessary to move the main box to the neutral position, which will enable the lower row in the transfer gearbox.

Frequent malfunctions

The design of the front drive axle is highly reliable; possible malfunctions arise due to natural wear of rubbing parts or violation of operating conditions. Gearbox failures are associated with loss of crankcase sealing or damage to gears. The car owner can independently find the cause of the breakdown and carry out repairs in a garage.

High noise level

An increased noise level indicates a decrease in oil level and mechanical wear of the rolling bearings or gears of the main pair and differential. If adding lubricant does not reduce the operating noise, then it is necessary to disassemble the unit and replace worn elements.

After reassembly and restoration of the oil level, the functionality of the Patriot front axle is checked.

Noise during operation of the bridge occurs due to incorrect adjustment of the main gear gears. To restore normal operating conditions, the position of the parts is adjusted (using steel spacers), but if the teeth are damaged or worn, it is impossible to ensure the required contact patch. In this case, a complete replacement of gears is carried out; installing gears from different sets is strictly prohibited.

The leak occurs through the gasket between the cover and the gearbox housing, as well as through the sealing gland. The cause of the defect is wear of parts or damage to elements during installation or maintenance of the vehicle. To restore normal operating conditions, it is necessary to replace damaged parts; it is permissible to apply a sealant to the surface of the gasket. After repairs, it is necessary to restore the transmission oil level in the front axle gear housing.

Grease drying out

During operation of the machine, degradation of the lubricant located in the axle housing occurs. At high temperatures, the oil evaporates, and when overcoming water barriers, water enters the cavity. To check the lubricant level, use a control hole closed with a screw plug. If the owner regularly overcomes water obstacles, it is recommended to install extension hoses on the ventilation ducts. The lines are routed under the hood of the car, reducing the risk of water and dirt getting into the crankcases.

Node jamming

Jamming of the gearbox occurs in the case of increased axial clearance in the bearing supports on which the drive shaft of the main pair rotates. Due to the movement of the axis, the contact patch between the gears is disrupted, which leads to wear and destruction of the teeth.

During operation, it is necessary to periodically check the condition of the bearings by rocking the drive axle by the flange intended for attaching the propeller shaft.

Axle maintenance consists of periodically checking the level and changing the oil in the crankcase (every 45 thousand km). It is recommended to monitor the condition of the sealing elements and parts holding the beam to the vehicle. It is also necessary to promptly adjust the axial clearances, which change due to natural wear of gears and rolling bearings. Additionally, the gap in the steering knuckle pins is eliminated and the toe angle is adjusted.

The old oil is drained after the crankcase has warmed up while driving. The housing design includes a threaded plug; a container is placed under the hole to collect waste liquid. It is necessary to wipe the surface of the plug from particles formed when the gears wear out (a magnet is provided in the design of the part). Oil is filled through a control hole closed with a threaded plug. The normal level of lubricant is located near the bottom edge of the hole.

Front axle: installed on UAZ Patriot

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

A significant influence on the durability and trouble-free operation of the front and rear axles is exerted not only by the quality of installed parts and timely repairs, but also by operating conditions.

Constant use of all-wheel drive unnecessarily accelerates the wear of parts. In addition, increased load on transmission elements leads to increased fuel consumption and operating costs.

• about the project
• Directory
• Library
• Directory of companies
• Reviews
• Consultations
• Ask a Question

Share photos and rate photos of other users

We have compiled a selection of videos about the repair and maintenance of UAZ vehicles

DIY repair

The design of the front beam allows for repair work to be carried out on one’s own, but some of the work is carried out under service conditions. For example, a car owner cannot correctly adjust the angle of deflection of the front wheels. The beam design includes a thrust bolt that does not allow the fist to be deflected by an angle greater than 31-32°, but determining the parameter is only possible on a bench.

Algorithm of actions when installing a new drive shaft oil seal:

1. Place the vehicle on a level surface, then apply the parking brake and place chocks under the wheels.
2. Using wrenches, unscrew the 4 bolts holding the propeller shaft flange to the counter pad located on the drive shaft shank. To make the procedure easier, it is recommended to treat the threads with WD40.
3. Remove the bolts and move the drive shaft to the side.
4. Unscrew the central nut holding the flange with the reflector on the drive axle of the front axle gearbox.
5. Use a screwdriver or an awl to pry up the worn oil seal, and then remove the part from the mounting hole.
6. Wipe the surface with a rag to remove any remaining oil and dust.
7. Install a new oil seal in its original place, using the worn part as a mandrel.
8. Mount the washer and flange on the shaft, and then tighten the fastening nut.

During self-service, it becomes necessary to adjust the alignment of the front discs and tires. To change the parameter, use a transverse steering rod, which is equipped with a coupling with lock nuts. Before tuning, the steering rod joints and wheel bearings are checked to ensure there is no play. To determine the angle, you need to measure the distances between the center lines on the sidewalls of the tires. When adjusted correctly, the clearance at the front is 0.5-1.5 mm greater than the distance between the tires at the rear.