Bridges UAZ Patriot their arrangement and maintenance is a rather interesting topic among UAZ producers. Especially many are worried about front axle UAZ Patriot, because structurally the front axle is 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 driving axles and the arrangement of these transmission elements. Initially, the bridges of UAZ off-road vehicles were "military" and "collective farm", they decently differed in their arrangement among themselves. Among lovers of SUVs, it is the "military" types of bridges that are valued. But on the current UAZ Patriot, completely different bridges are installed, which have a number of features, although some parts are interchangeable with 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 did not fit the rather wide Patriot. Also, the main gear housing was changed in the design, which is closed with a removable steel cover, and to access the main gear and differential, you no longer need to remove and disassemble the axle, you can simply remove the cover.

The design of the front and rear axles "Spicer" are similar, and we will talk about the features below. So the bridge case
consists of a one-piece cast crankcase of the main gear, casings (stockings) of the axle shafts pressed into it and a stamped cover. The absence of a split 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 crankcase ensures durability and high precision of the main pair teeth meshing.

A schematic of the Patriot front axle is shown in the first picture at the very top of the article. The main feature of the bridge can be considered the presence of constant velocity joints. After all, the front wheels, in addition to rotation, should also turn. Initially, the Weiss type CV joints were used, but they were abandoned. Due to the design features, the steering angle did not exceed 27 degrees, which affected the vehicle's maneuverability. Therefore, new CV joints of the "Bearfield" type are now being installed, which provide a 32-degree turn and more durable, due to a more uniform load on the elements of the pivot joint.

Only "SHRUS-4" is used as a lubricant for the UAZ Patriot SHRUS, the previously widely used LITOL-24 grease is no longer suitable for these purposes.

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

Usually the rear axle "Spicer" does not cause problems for SUV owners. The main thing is to constantly monitor the oil level in the axle housing. Since the bulkhead of the bridge or replacement of the final drive with a differential is a lottery. It's pretty easy to run into raw metal and then drive with a constantly humming transmission.

The main tips for using Patriot bridges 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 are 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.

Recall 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 wheel hangs in the air, then only the one that is free will rotate. The same is with the rear wheels. In order not to get into a stupid situation, real off-road lovers re-install the interwheel lock on their own. Today there are several types of locks for every taste and wallet.

SPICEER
(spicer bridge)

The axle housing is assembled from a cast crankcase of the primary gear, as well as casings (stockings) of the axle shafts and a stamped cover pressed into it. It should be noted that the absence of a standard connector in the plane of the bridge gives the bridge structure higher rigidity, the unloaded connection of the cover with the crankcase, in principle, reduces leaks at their joint, and the placement of the primary main gear and the axle differential in a single crankcase ensures the highest accuracy of engagement of mechanisms and assemblies and more suitable conditions for the operation of bearings. Thanks to all these design features, the actual life of the bridges has increased significantly. Indeed, in addition, now, in order to access the primary pair and the differential, it is not at all inevitable to dismantle the bridge from the car and "half" it - it is very easy to remove the cover. Maintenance of the Spicer bridge is reduced to maintaining a normal oil level in the crankcase and changing it, monitoring the condition of the seals and axle mountings and eliminating the resulting gaps in the differential and pinion bearings. The details of the maintenance and repair operations for Spicer bridges are described in the Manual for the maintenance and repair of the UAZ-Patriot vehicle IR-05808600.050-2005. Third edition. 2007 To reduce warpage of the driven gear during its heat treatment and, as a result, reduce noise, increase the reliability and durability of the main gear, the thickness of the "substrate" of the driven gear was increased by 8 mm. Unfortunately, this measure led to a change in the left differential cup. However, the new differential can be used on the old split-crankcase single-stage axles, provided that an expansion ring is installed on the spike of the cup. Spicer bridges are unified with old single-stage bridges in a number of other details. These are differential bearings, rear axle half-shafts and almost all parts of the hub assemblies. The front bearing with a double seal (469-2307086-03) and a new double-lip collar of the drive pinion flange are unified with similar parts of the U-shaped ("military") axles manufactured by JSC "UAZ". As for the front driving and steering axles, here, in addition to the above points, it should be noted the new constant velocity joints (CV joints) of the Birfield type, which are much more durable than the old design joints (Weiss). CV joints of this type are familiar to our drivers from front-wheel drive models of both domestic and foreign production. At present, all Spicer and Timken bridges are equipped with such hinges. It will be useful to remind their owners that to lubricate the Birfield hinges, special grease SHRUS-4 (SHRUS-4) is used, which should not be put into the entire inner cavity of the steering knuckle, as before, but only into the hinge itself. The use of other types of lubricants, including the traditional Litol-24, is unacceptable. During operation, adding grease to the joint is not required. The inner cavity of the steering knuckle is filled with Litol-24 grease. The Spicer type bridges currently produced by the plant have a gear ratio of 4.111 (37: 9) or 4.625 (37: 8). Axles with a gear ratio of 4.111 are installed mainly on cars with gasoline engines, and with a gear ratio of 4.625 - on cars with diesel engines. Work on improving the design is carried out at the plant constantly, and we will try to inform you about all new products coming out in the range of UAZ driving axles. In the early 90s, for the new UAZ-3160 vehicle at the Ulyanovsk Automobile Plant, Spicer-type drive axles with a one-piece crankcase were developed. Currently, Spicer bridges are being installed on UAZ-Hanter, UAZ-Patriot, UAZ-23602, UAZ-23632 vehicles ...

FRONT AXLE

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

Possible malfunctions

Cause of malfunction Remedy
constant increased noise during the operation of the front axle
1. Worn or incorrectly adjusted differential bearings.
2. Incorrect adjustment. damage or wear of gears or gearbox bearings.
3. Insufficient amount of oil in the axle housing. 1.1 Replace worn parts, adjust differential bearing.
2.2. Determine if the gearbox is faulty, repair or replace it
3.3. Restore the oil level, check if there is no oil leakage through the seals of the front axle housing
Noise during vehicle acceleration and engine braking
1. Incorrect adjustment of the meshing of the main gears.
2. Incorrect lateral clearance in the meshing of the final drive gears.
3.Increased clearance in the pinion bearings due to a loose flange nut or bearing wear. 1.1. Adjust the engagement.
2.2 Adjust the clearance.
3.3 Adjust the clearance, replace the bearings if necessary.
Knock at the start of the vehicle
Worn hole for the pinion shaft in the differential box Replace the differential box and, if necessary, the pinion pin
Replacing the oil seal of the drive gear shaft of the front axle reducer

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

Note
Oil leakage can also be caused by excess oil in the crankcase or a clogged breather.
You will need: socket head "27", wrench, flat-blade screwdriver, torque wrench.
1. Brake the car with the parking brake, place stops under the rear wheels of the car. Raise and support the front of the vehicle.

2. Keeping the bolts from turning, unscrew the four nuts securing the propeller shaft to the flange of the front axle reducer, remove the bolts and take the shaft aside (see "Removing and installing the propeller drive").
3. Unscrew the nut securing the front axle drive shaft flange and remove the flange with reflector.
4. Using a screwdriver, remove the oil seal from the axle housing.
5. Press the new oil seal into place with the correct size mandrel.

Note
6. Install the parts in the reverse order of removal.
7. Tighten the front axle drive gear shaft flange nut by turning the shaft by the flange so that the bearings sit in place (see "Adjusting the front axle final drive bearings").

Removal and installation of the wheel cut-off clutch

The wheel clutch is removed to replace it or gain access to other units.
You will need: wrench "14", flat-blade screwdriver, external circlip remover.

1. Unscrew the three fastening screws ... 2. ... and remove the clutch cover. 3. Remove the six bolts securing the wheel clutch and remove it. 4. Remove the three screws securing the coupling cover to the flange ... 5. ... and remove the cover. 6. With the Outer circlip remover, use a screwdriver to pry out the circlip by prying it off? 7. “remove the circlip and the washer installed under it” 8.…. And remove the splined sleeve from the flange.

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

Removal and installation of a semiaxis

The half-shafts of the front wheels are removed for replacement in case of damage, failure of the constant velocity joints (SHRUS) or to gain access to other units.
1. Brake the car with the parking brake, place stops under the rear wheels of the car. Raise and place the front of the car on supports, remove the wheel. 2. Remove the brake disc (see "Replacing the brake disc"). 3. Remove the wheel speed sensor (see "Replacing the sensors of the anti-lock braking system"). 4. Unscrew the bolts securing the trunnion to the steering knuckle and remove the trunnion assembly with the hub and the wheel shut-off clutch (see "Removing and installing the steering knuckle"). 5. Remove the axle shaft assembly with the CV joint from the axle housing.

6. Before installing the semiaxis, put clean SHRUS-4 grease into the constant velocity joints.
7. Install the parts in the reverse order of removal.

Replacing the oil seal of the front axle half shaft

Replace the oil seal if you find oil leakage 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, place stops under the rear wheels of the car. Raise and place the front of the car on supports, remove the wheel.

2. Remove the steering knuckle (see "Removing and installing the steering knuckle") and fix it in a vice. 3. Using a screwdriver, remove the oil seal from the ball joint of the steering knuckle.

4. Install a new oil seal, carefully pressing it into the ball joint using a mandrel of a suitable diameter, and lubricate the working edge of the oil seal with Litol-24 grease.

Note
An old oil seal can be used as a mandrel.
5. Install the parts in the reverse order of removal.

Removal and installation of the main transfer of the front axle

The main gear is removed for repair or replacement. You will need: keys "for 10", socket head "for 19", "for 27".

1. Brake the car with the parking brake, place stops under the rear wheels of the car. Raise and place the front of the car on supports, remove the wheels.

2. Unscrew the plug and drain the oil from the front axle (see "Changing the oil in the front axle"). 3. Remove both axle shafts (see "Removing and installing a semiaxis"). 4. Disconnect the left end of the tie rod from the bipod of the steering mechanism (see "Adjustment and replacement of the ends of the tie rods") and take the tie to the side. 5. Keeping the bolts from turning, unscrew the four nuts securing the propeller shaft to the flange of the front axle gearbox and move it aside (see "Removing and installing the propeller drive"). 6. Remove the ten bolts securing the cover of the final drive housing ... 7. ... and remove the cover. 8. Clean the old gasket from the mating surface.

9. Unscrew the nut securing the front axle drive shaft flange.
10. Remove the flange with reflector.

11. Unscrew two bolts each of the differential bearing caps, remove the covers and remove the differential assembly with the driven gear, and then the shaft with the drive gear assembly with the rear bearing.
12. Remove the flange oil seal (see "Replacing the shaft seal of the drive gear of the front axle reducer").
13. Remove the drive pinion shaft front bearing from the front axle housing.
14. Press out the outer races of the front and rear bearings of the pinion shaft from the crankcase.
15. Install the parts in the reverse order of removal.
16. Adjust the final drive (see "Adjusting the bearings of the main drive of the front axle").
17. Fill the front axle crankcase with oil (see "Checking the level and adding oil to the front axle crankcase").

Disassembly and assembly of the front axle differential

You will need: keys "14", "17".
1. Remove the differential assembly with the driven gear (see "Removal and installation of the main drive of the front axle").
2. Press the bearings off the axle of the differential box.
3. Remove the ten bolts securing the driven gear to the differential and remove the driven gear.
4. Remove the eight differential carrier cup bolts and separate the cup.
5. Remove the differential gears and pinions with axles.
6. Assemble the differential in the reverse order of removal.

Note
Before assembling the differential, lubricate the side gears, satellites, thrust washers and pinion axles with transmission oil.
7. Tighten the bolts of the driven gear of the differential box evenly, screwing each bolt one turn, alternately going from bolt to bolt in diameter.

Front axle final drive bearing adjustment

Adjust the final drive bearings in the following order.

1. Select the adjusting ring 5 (see Fig. 6.4). Its thickness d1 (Fig. 6.5) is determined (with an accuracy of + -0.025 mm) based on the actual dimensions B and D (see Fig. 6.5 and 6.6) by the formula d1 \u003d B - (111.960 + D) (mm).

Figure: 6.6. Differential bearing adjustment parameters

Figure: 6.7. Measuring the mounting height of the main drive pinion bearing:

1 - mandrel; 2 - outer bearing race; 3 - bearing

Install the ring in the crankcase 16 (see Fig. 6.4) of the main gear.
2. Install the pinion shaft into the front axle housing.

Note
Check the torque of the pinion shaft. It should be 1.0-2.0 N / cm (0.1-0.2 kgf / cm).
3. When installing the differential assembly with the driven gear, measure dimension E (Fig. 6.7), applying an axial force P equal to 4000-5000 N (400-500 kgf), and turning the gear several times so that the bearing rollers take the correct position. Measure the distance B in the crankcase (see Fig. 6.5) from the pinion axle to the thrust end of the differential bearing. For the actual dimensions B, E and the mounting size of the driven gear equal to 50 mm, select (with an accuracy of + -0.025 mm) the adjusting ring according to the formula
d2 \u003d B - (E + 50 + X) (mm), where d2 is the thickness of the adjusting ring;
X is the maximum deviation from the mounting dimension, equal to 50 mm, with a corresponding sign (plus or minus), this dimension is electrograph applied to the end face of the driven gear.
4. Install the differential assembly with the outer rings of its bearings and the adjusting ring in the front axle housing and secure it.
5. Adjust bearings 6 and 22 (see Fig. 6.4) of the front axle differential by tightening nut 23, periodically rotating the differential so that the bearing rollers take the correct position. After tightening the nut, the total turning torque of the differential drive gear (Mv.sh.) Should be within Mw. sh. + (0.21-0.42) (Nm). Check by turning by the pinion gear.

Fig. (6.8.) Measuring the installation dimension of differential with bearing:

1, 5 - mandrel; 2 - differential assembly with a driven gear; 3 - bearing; 4 - outer bearing race

Note
Check and adjust the lateral clearance in the meshing of the gear wheels of the installed new final drive set after adjusting the position of the gears.
The side clearance is checked with an indicator, the post of which is attached to the bridge casing in the direction, p
perpendicular to the tooth surface of the driven gear when attaching the indicator stand to the housing. Check the clearance on three to four teeth, evenly spaced around the circumference. The spread of clearance values \u200b\u200bshould not exceed 0.05 mm. Normal side clearance should be between 0.15 and 0.25 mm. If the side clearance is less than the specified value, then the selected adjusting ring should be replaced with a ring of a smaller thickness. It is not necessary to preload the differential bearings when checking and adjusting the lateral clearance.
6. Tighten the adjusting nut 23 until it comes into contact with the bearings and there is no clearance in them.
7. Check the meshing of the main gears by the contact patch, for which paint the teeth of the driven gear with paint (2 teeth in three or four places evenly around the circumference). 8. While braking the drive gear shaft by the flange, rotate the driven gear in both directions until contact spots appear on the gear teeth, as shown in fig. 6.8.

Note
With correct adjustment of the gear engagement, the contact patch should be located in the places of the teeth shown in Fig. 6.8 (item 1).
In case of contact at the top of the tooth (key 2), move the drive gear to the driven gear, increasing the thickness of the adjusting ring, and to maintain the value of the side clearance, move the driven gear away from the driving gear.
In case of contact at the base of the tooth (key 3), move the drive gear away from the driven gear, reducing the thickness of the adjusting ring, and to maintain the value of the lateral clearance, move the driven gear to the drive gear.

Figure: (6.9.) The location of the contact patch on the teeth of the main gears:
A - forward side; B - reverse side; 1 - correct location; 2 - the contact patch is located at the apex of the tooth; 3 - the contact patch is located at the base of the tooth; 4 - the contact patch is located at the narrow end of the tooth; 5 - the contact patch is located at the wide end of the tooth
In case of contact at the narrow end of the tooth (key 4), move the driven gear away from the driving gear, reducing the thickness of the adjusting ring, while moving the driving gear to the driven gear to maintain the value of the side clearance.
In case of contact at the wide end of the tooth (key 5), move the driven gear to the drive gear, increasing the thickness of the adjusting ring, and to maintain the value of the lateral clearance, move the drive gear away from the driven gear.
9. Install the locking plate onto the differential bearing cover.
10. After assembling the final drive, check its heating after making a test drive on the car. If the front axle housing in the area of \u200b\u200bthe pinion bearings and differential bearings heats up over 90 ° C, then re-adjust the preload

REAR AXLE

Single-stage drive axles are installed on the Hunter car (Fig. 1). The main gear and differential of the rear and front axles are similar in design. The rear axle of the UAZ Hunter is a rigid hollow beam, at the ends of which the hubs of the driving wheels are installed on the bearings, and the main gear (hypoid) and the differential are located inside. From the main gear, the torque is transmitted through the axle shafts to the hub.

Maintenance of the rear axle consists in maintaining the required oil level in the crankcase and its timely change, checking the seals. timely detection and elimination of axial clearances in the gears of the main drive, periodic cleaning of the safety valve, tightening of all fasteners and cleaning the magnetic plug from metal particles when changing the oil.

The axial clearance in the bearings of the main drive pinion is not allowed, because if it is present, there is a rapid wear of the gear teeth and the bridge may jam. Check the axial clearance by swinging the drive gear by the propeller shaft mounting flange.

Axial play in the bearings of the differential of the final drive is also not allowed. Check it by swinging the driven gear (see Figure 1) 2 with the cover removed 21
Eliminate the axial clearance of the driven gear of the main drive by tightening the nut 17 of the differential bearing, after removing the lock plate 19.

1 - Carter; 2 - driven gear of the main transfer; 3 - gear wheel leading the main transfer; 4 - rear bearing; 5 - front bearing; 6 - ring; 7 - flange; 8 - nut; 9 - washer; 10 - cuff; 11 - spacer sleeve; 12 - adjusting ring; 13 - oil distillation ring; 14 - filler plug; 15 - differential bearings; 16 - right semiaxis; 17 - differential bearing nut; 18 - bolt; 19 - locking plate; 20 - persistent washer; 21 - crankcase cover; 22 - differential; 23 - bolt; 24 - gasket; 25 - left semiaxis; 26 - safety valve; 27 - adjusting ring; 28 - bolt; 29 - differential bearing cover

1 - drive gear flange; 2 - rear propeller shaft; 3 - brake force regulator; 4 - stepladder; 5- stepladders; 6 - rear shock absorber; 7 - rack of the drive lever, brake force regulator; 8 - rear axle housing; 9 - drain plug; 10 - filler plug.

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The entire line of all-wheel drive UAZ vehicles has the same transmission design. On the Patriot and Hunter models, as well as all additional models created on their basis, Spicer units are installed, which are equipped with a continuous crankcase. They are named so in honor of the engineer K. Spicer. He is the author of a large number of patents that are now owned by Dana Co.

This type of front axle first appeared on the 3160 and 3162 models, after which they began to be used for the Patriot, Hunter and pickup models based on them.

The front axle of the UAZ Patriot has combined functions. It can be both master and controlled at the same time. It is based on a hollow beam, inside which the main gear and differential pass. Through them, torque is supplied to the front hubs.

The axle shaft is made in the form of a whole part, with installed CV joints, which allow entering a large angle of rotation, while maintaining the torque.

At the moment, such hinges are also installed on other UAZ models on the old-type nodes - Timken. This allows you to combine the great reliability required by the cargo-passenger transport with good handling. Such models are called hybrid bridges.

The rear axle of the UAZ Patriot is also made in the form of a hollow beam, at the ends of which the hubs of the driving wheels are fixed with the help of special bearings. They are driven by an internally located differential. In this respect, the design of the rear and front axles is quite similar.

Design features.

To give the structure the greatest strength, the thickness of the substrate is increased by almost 10 millimeters. As a result, reliability has increased significantly, but the noise level has decreased. The first type was mainly used on cars with a gasoline engine, the second only on diesel ones, produced since 2015.

When buying, it should also be borne in mind that the width of the bridges for some models is different. For example, Hunters are fitted with front assemblies with catalog number 31605-2300011. They provide a track size of 1445 millimeters, a gear ratio of 4.111. Model 3162-2400010-10 is installed on Patriots and pickups

The rear assembly is part number 3162-2400010-10 with a gear ratio of 4.111.

Checking the status.

Service must begin with an external inspection of the axles and control of the oil level in the crankcase. It should be level with the drain plug hole. In addition, you should periodically check the tightness of all bolts, the absence of gaps in the gears.

When changing the oil, it is necessary to check for metal chips on the drain plug magnet. Its presence will indicate the development of the gears.

Clearance adjustment.

Axial clearance is the most common problem that occurs during vehicle operation. This is due to severe wear on the gear teeth, which over time can lead to a jamming of the axle.

You can check the condition by shaking the drive gear by the flange.

To eliminate this problem, tighten the flange nut properly. This may require a little effort as there is little centering on it. It should be tightened until the gap disappears.

Useful video

On UAZ Patriot and UAZ Hunter cars, as well as all models based on them, front and rear single-stage drive axles of the Spicer type with a one-piece crankcase, named after the American engineer Clarence Spicer, are installed

External view of the front axle "Spicer"

Spicer bridges began to be installed on UAZ-3160 and UAZ-3162 Simbir vehicles, instead of Timken bridges. But on these cars, as well as on the first models of UAZ Hunter, "narrow" bridges with a width of 1445 mm were installed.

UAZ Patriot began to install "wide" bridges with 1600mm gauge.

Design features

The axle casing consists of a one-piece cast crankcase of the final drive, casings (stockings) of the axle shafts pressed into it and a stamped crankcase cover.

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

Thanks to all these design features, the actual life of the bridges has increased significantly. In addition, now, to access the main pair and the differential, it is not necessary to remove and "half" it - just remove the cover.

To reduce warpage of the driven gear during its heat treatment and, as a result, reduce noise, increase the reliability and durability of the final drive, the thickness of the "substrate" of the driven gear was increased by 8 mm. However, this measure led to a change in the left differential cup. But, the new differential can be used on the old single-stage axles with a split crankcase, provided that an expansion ring is installed on the spike of the cup.

Spicer bridges are unified with old single-stage bridges in a number of other details. These are differential bearings, rear axle half-shafts and almost all parts of the hub assemblies. The front bearing with a double seal (469-2307086-03) and a new double-lip collar of the drive pinion flange are unified with similar parts of the U-shaped ("military") axles manufactured by JSC "UAZ".

As for the front driving and steering axles, here, in addition to the above points, it should be noted new joints of equal angular velocities ( CV joint) like " Beerfield", Which are much more durable than old-style hinges (" Weiss"). At present, all Spicer and Timken bridges are equipped with such hinges. It will not be superfluous to recall that to lubricate the Birfield hinges, a special SHRUS-4 grease is used, which should not be put into the entire inner cavity of the steering knuckle, as before, but only into the hinge itself. The use of other types of lubricants, including the traditional Litol-24, is unacceptable. During operation, adding grease to the joint is not required. The inner cavity of the steering knuckle is still filled with Litol-24 grease.

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

Spicer bridges produced by the plant have a gear ratio of 4.111 (37: 9) or 4.625 (37: 8). Axles with a gear ratio of 4.111 are installed mainly on cars with gasoline engines, and with a gear ratio of 4.625 - on cars with diesel engines.

Front wheel hub

Front wheel hub UAZ with disc brakes, but without ABS

Front axle steering knuckle

Steering knuckle and hub.
1 - leading flange with a plug; 2, 10, 25 - gaskets; 3 - a hub with a brake disc; 4 - hub bearings; 5 - wheel bolt; 6 - brake disc shield; 7 - heat-insulating shield of the ABS sensor; 8 - pin; 9 - steering knuckle body; 11 - clamping sleeve; 12 - kingpin; 13 - pivot liner; 14-bracket for fastening the ABS harness; 15 - spring; 16 - outer sealing ring; 17 - inner sealing ring; 18 - hinge; 19 - ball bearing; 20, 28 - thrust washers; 21 - pivot support; 22 - outer cage of the oil seal; 23 - pad; 24 - nut; 26 - impulse disk; 27 - cuff; 29 - retaining rings; 30 - lock washer; 31 - nuts; 32 - lock washer

UAZ steering knuckle assembly diagram:

1 - brake disc shield; 2 - amplifier of the heat-insulating shield of the ABS sensor; 3 - heat-insulating shield of the ABS sensor; 4, 18 - bolts; 5 - impulse disk; 6 - hub; 7, 12 - bearing; 8 - lock washer; 9 - nut; 10 - lock washer; 11 - lock nut; 13 - thrust washer; 14 - cuff; 15 - pivot of the steering knuckle; 16 - gasket; 17 - steering knuckle joint; 19 - ball bearing; 20 - axle shaft casing

Adjustment of axial clearances in the front and rear axle Spicer

The axial clearance in the bearings of the main gear drive gear is not allowed, since if it is present, the gear teeth wear quickly and the bridge may jam. Axial clearance is checked by swinging the drive gear by the propeller shaft mounting flange.

Front axle "Spicer". Camber, convergence

The front axle is a steering axle. To facilitate driving, the front steering wheels have camber ( not adjustable) in the vertical plane and convergence in the horizontal plane.

Convergence of wheels. AND< Б на 1,5-3 мм.

To return the wheels to the middle position, the pivots of the steering knuckles are inclined in the longitudinal and transverse planes.

Positive camber is the deviation of the top of the wheel from the vertical plane outward.
The camber angle at the Spicer axles is a \u003d 1 ° - 30 ". Wheel camber affects tire wear. When camber is up to 2 °, the wear will not be very large. camber gradually decreases to zero, and then the deflection of the wheels moves towards negative camber, which worsens wheel steering.

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

The longitudinal tilt of the king pin (KASTOR) is designed to stabilize the steered wheels in the middle position, but its effect is noticeable only at high speeds with significant centrifugal forces. The stabilizing moment and the angular speed of the wheel when returning to the neutral position serve as the measuring wheel stabilization when the car exits a turn.

Maintenance

Maintenance of the Spicer bridge is reduced to maintaining the oil level in the crankcase and periodically replacing it, monitoring the condition of all seals and axle mountings and timely elimination of the resulting axial clearances in the gear and differential bearings.

The details of the maintenance and repair operations for the Spicer bridges are described in the Manual for the maintenance and repair of the UAZ Patriot vehicle IR-05808600.050-2005. Third edition. 2007

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

The front and rear axles of the Spicer type began to be installed on the UAZ-3160 and UAZ-3162 Simbir cars, instead of the bridges 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, it simultaneously performs the functions of driving and steering, is a rigid hollow beam, inside which the main hypoid gear and differential are located. From the main gear, the torque is transmitted to the front hubs through the axle shafts.

The axle shaft is a single piece with constant velocity joints (CV joints) of the Rceppa-Bearfield type, named after its inventor Alfred Rzeppa and the American company Bearfield, which produced it under a patent. It is more compact than the Bendix-Weiss pivot on Timken bridges, can handle higher angles and transmit more torque.

At the present time, such hinges are also equipped with front axles of the old design of the Timken type, which are still installed on cars. For this reason, they have acquired the name - hybrid bridges.

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

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

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

The thickness of the driven gear substrate in the new axles has been increased by 8 millimeters, which reduced noise and increased the reliability of the final drive. The new differential can be used on old single-stage axles with split crankcase, provided that an expansion ring is installed on the spike of the cup.

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

On UAZ Hunter cars and all models based on it, so-called narrow axles with a track gauge of 1445 mm are installed, 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.

Wide bridges with 1600 mm track gauge, front axle 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. Rear axle part number 3162-2400010-10, 3163-2400010, gear ratio 4.111 or 4.625.

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

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

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

To lubricate the Birfield type hinges, a special SHRUS-4 grease is used, which must not be put into the entire inner cavity of the steering knuckle, as before, but only into the hinge itself. The use of greases of a different type, including the traditional Litol-24, is unacceptable. During operation, adding grease to the joint is not required. The inner cavity of the steering knuckle is filled with Litol-24 grease.

Adjustment of axial clearances in the front and rear axle UAZ.

The axial clearance in the bearings of the main gear drive gear is not allowed, since if it is present, the gear teeth wear quickly and the bridge may jam. Axial clearance is checked by swinging the drive gear by the propeller shaft mounting flange.

To eliminate the axial play of the pinion gear, tighten the flange nut. The nut has a punching in the groove of the threaded part of the drive gear and when tightening, more effort is required on the key. The nut is tightened carefully until the axial clearance of the pinion gear is eliminated, not allowing it to be tightened, after which it will re-center. If the tightened nut cannot be tightened, then it should first be released by 0.5-1.0 turns, and then tightened until the axial play is eliminated and tightened.

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