Do-it-yourself repair of the front axle on the UAZ patriot

• the brake disc is removed;
• the wheel speed sensor is unscrewed (ABS systems);
• the trunnion is freed from the steering knuckle, the assembly is dismantled;
• now you can pull out the axle shafts together with the CV joint and carry out the required repair work;
• before reassembly, they must be treated with SHRUS-4 grease.

Bronze bridge pins

Semiaxis oil seal repair. At the stage of removing the UAZ Patriot axle shaft, it is imperative to check the condition of the oil seal. If it is necessary to replace it after removing the steering knuckle, fix it in a locksmith's vice and remove the damaged oil seal. When installing a new oil seal, it is required to lubricate it with Litol-24 grease.

• extrusion of bearings from the journal of the mechanism box;
• dismantling the driven gear;
• separation of the differential cup;
• removing the gear of the mechanism and satellites;
• after replacing worn parts, the assembly is carried out in the reverse order.

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In order for the UAZ Patriot bridge to work 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 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 the drive gear, check the torque while rotating the shaft. It should not exceed 1.0-2.0 Nm.
3. A similar algorithm is used to select an adjusting ring for the driven gear.
4. When installing the differential, the bearing clearances of the axle shafts are set with adjusting nuts.
5. After mounting the mechanism, the output torque should be no more than 0.42 Nm when rotating behind the drive gear.
6. A necessary operation to control 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 contact point of the teeth.

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

As you can see, the structural simplicity of the UAZ Patriot drive axle allows you to carry out maintenance and repair of this unit yourself. The front and rear axles, with the necessary care and correct adjustment of the mechanical engagement, will serve for a long time. It is only necessary to regularly check the oil level in the axle gearbox, as well as its timely replacement.

In the event of extraneous noise or other malfunctions, it is necessary not only to adhere to the correct sequence of repair operations, but also to observe certain adjustment parameters that can affect the operation of the mechanism as a whole. The front and rear axles of the UAZ Patriot are similar in design. All instructions for maintenance and repair of the rear axle apply to the front axle.

When carrying out repairs, it is important to ensure the safety of workers, therefore, you need to use only serviceable tools and follow the necessary work rules.



Not only the quality of the installed parts and timely repairs, but also the operating conditions have a significant impact on the durability and reliability of the front and rear axles.

Continuous use of all-wheel drive unnecessarily accelerates the wear of parts. In addition, the increased stress on the transmission elements leads to an increase in fuel consumption and operating costs.

The front axle of the Spicer type, which is installed on the UAZ Patriot and the UAZ Hunter, is combined. It simultaneously performs the functions of driving and steered, and is a rigid hollow beam, inside which the main hypoid gear and differential are located.

Front axles Spicer with a track gauge of 1445 mm, catalog number 31605-2300011 - gear ratio of the main gear 4.111, or 31608-2300011 with a gear ratio of 4.625, are installed on cars UAZ Hunter and models based on it.

Front axles Spicer with 1600 mm track gauge, catalog number 3163-2300011, 3163-2300011-10, 3163-2300011-10, gear ratio 4.111 or 4.625 are installed on UAZ Patriot, UAZ Pickup and UAZ Cargo cars.

The main gear and differential of the front and rear axles of the Spicer type on the UAZ Patriot and UAZ Hunter are similar in design. All instructions for maintenance and repair of the rear axle also apply to the front axle. In the front axle, the steering knuckles are additionally serviced and repaired.

The steering knuckle of the front axle Spicer is equipped with constant velocity joints of the Birfield type CV joint and spherical pivot assemblies. To reduce the wear of the front axle parts and save fuel when operating the car on paved roads, together with the front axle disengagement, the front wheel hubs should also be disconnected using the clutch. Install the front wheel deactivation clutch on the front axle or remove it from the axle in the disengaged position.

During maintenance of the front drive axle, the clearance in the bearings of the pivots, the toe-in of the wheels and the maximum angles of the wheels are checked and, if necessary, eliminated, the fastening of the steering knuckle is checked and tightened. When inspecting the steering knuckles, attention is drawn to the serviceability of the wheel stop-limiters, bolts and the reliability of their locking.

There is no need to add grease to the ball pins and ball joints with Birfield joints during operation. The lubricant is changed during repair. Only recommended lubricants are used. To lubricate the joints of equal angular velocities SHRUS type Birfield, lubricants SHRUS-4, SHRUS-4M or their imported analogs are used.

The steering knuckle ball pivot tightening is adjusted at the factory with a preload along the common pivot axis. During the operation of the vehicle, special attention should be paid to the tightening condition of the steering knuckle pins. With the wear of the rubbing spherical surfaces of the liners or pins, the preload disappears and a gap forms along the common axis of the pins. This gap is eliminated by tightening the clamping sleeve.

Operation of the front drive axle Spicer with clearances in the pivot assemblies leads to premature failure of the upper pivot liner. In operating conditions, it is most convenient to tighten the clamping sleeve of the lower kingpin:

- unscrew the nut and remove the lining with the gasket
- tighten the clamping sleeve with a special wrench until the gap is eliminated, first hitting the threaded end of the king pin with a copper hammer
- by turning the key 10-20 degrees, pull this bushing to create a preload along the common axis of the pins
- install a lining with a gasket and tighten the nut by applying a torque of 80-100 Nm.

The turning moment of the ball joint or the steering knuckle housing, if the ball joints were not disconnected from the axle shaft casing, with the outer and inner sealing rings and the steering knuckle joint removed in either direction relative to the common axis of the pivots, should be within 10-25 Nm (1.0-2.5 kgcm ).

If the control parameter is not reached, then re-tighten the clamping sleeve by turning the wrench another 10-20 degrees and tighten the nut to the specified torque. If the steering knuckle has been disassembled, 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 the ball joint from displacing.

The tapered surface and thread of the clamping sleeve, the friction spherical surfaces of the pivot and the liner are lubricated with LITOL-24 grease before being installed in the assembly. Screw the clamping sleeves up to the stop of the pins into the bushings on both sides, ensuring that dimensions A and B are equal from the ends of the steering knuckle housing to the sphere of the ball joint. Inequality of sizes A and B is allowed no more than 0.2 mm. To obtain sufficient accuracy, measurements of dimensions A and B should be carried out in plane B.

Increasing the torque by 20-30 Nm alternately, tighten the clamping sleeves to a final torque of 200-250 Nm. Fill the cavities above the clamping sleeves with LITOL-24 grease. Install the washers with spacers and tighten the outer nuts with a torque of 80-100 Nm. Check dimensions A and B. No clearance in the pivot unit is allowed.

The turning moment of the ball joint or the steering knuckle housing, if the ball joints were not disconnected from the axle shaft casing, in either direction relative to the common axis of the pins should be within 10-25 Nm (1.0-2.5 kgcm. If these parameters are not achieved, then the adjustment must be repeated by pulling or releasing the clamping sleeves from the bottom and from the top by the same amount.

Checking the maximum angles of rotation of the wheels is carried out at a special stand. The angle of rotation of the right wheel to the right, and the left wheel to the left should be within the range of З1-32 degrees. Adjustment is made with the swing limit bolt.

Toe-in is adjusted by changing the length of the tie rod. Before adjusting, make sure that there are no gaps in the joints of the steering rods and the bearings of the hubs. Having loosened the tightening of the lock nuts with the right and left threads, the required toe-in value is set by rotating the adjusting nipple.

Checking and adjusting wheel alignment must be done at a special stand for each wheel. Toe-in of the front wheels, for each wheel separately - 0 ° 1'32 "- 0 ° 4'36", total - 0 ° 3'04 "- 0 ° 9'12". In the absence of a stand, it is allowed to check and adjust the wheel alignment along the inner surfaces of the tires.

Toe-in at normal tire pressure should be such that dimension A, measured along the centerline of the sidewall of the tires at the front, is 0.5 to 1.5 millimeters less than dimension B at the rear. At the end of the adjustment, the lock nuts are tightened with a torque of 105 - 130 Nm.

- Large clearance in the bearings of the front wheel hubs
- Wear of pivots, liners of pivots

- Deflection of the covers of the axle shafts of the front axle

- Wrong toe, bent or incorrectly adjusted track rod.

The Ulyanovsk-made UAZ Patriot car 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 switched on when it is necessary to overcome all kinds of obstacles. Let's pay attention to the front axle of the UAZ 3160 Patriot SUV: its features, how the repair and replacement of the component parts of the device is carried out.

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

It looks like a hollow beam, in which two axle shafts are located. 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 crankcase. The transmission of torque is carried out by elements such as constant velocity joints. You can learn more about them from the material on this portal.

As mentioned above, the front axle is only activated when necessary. To put it into action, it is necessary to turn on the hub clutches 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 an off-road vehicle UAZ 3160, which shows the main structural elements: gears, differential, etc.




As you can see, the structure of the front axle is rather complicated, so it is very important to pay attention to its timely repair. Actually, we will pay attention to this issue and consider how the repair of the unit from the UAZ 3160 is carried out with our own hands and in what sequence it is carried out.

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

1. The car is installed on the inspection pit, fixed in a stationary state. After that, the front of the car rises until the wheels come off. Oil must be drained from the bridge by unscrewing the drain plug.
2. Initially, the propeller shaft is disconnected from the flange. The flange and propeller shaft are mated using four tie bolts, which must be removed. After unscrewing, the shaft must be swiveled to the side.
3. The flange is dismantled together with the reflector, after which you can see where the liner oil seal is located.
4. The shank oil seal is removed with a screwdriver, and we use tubes of the same diameter to press in a new product.

At this stage, the drive gear shank oil seal is 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 its direct repair is carried out.
2. The journal bearings are pressed out.
3. The driven gear is dismantled.
4. The differential cup is disengaged.
5. Gears and satellites are removed;
6. After the required parts have been replaced, the differential is assembled in the reverse order to removal, and, if necessary, it is adjusted.

A 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.