Razdatka UAZ Patriot diagram with description

All-wheel drive vehicles are required to be equipped with an element such as a transfer case or simply a transfer case. The UAZ Patriot SUV is no exception and is also equipped with a transfer case. Until 2014, Ulyanovsk engineers equipped their creations with a conventional mechanical transfer case, which was controlled using a lever inside the car. But already in 2014, Patriots with a new transfer case from the Korean company Hyndai-Daymos began to roll off the production line. But today we’ll pay attention to the old-style unit, which hundreds of thousands of Russian jeeps are equipped with, and find out how much such a unit costs.

Purpose and features

A transfer case is needed in order to distribute torque between the drive axles of an SUV. But that's not all, because this unit also makes it possible to increase torque when overcoming off-road areas using a lower gear. This device is located on a UAZ Patriot car directly near the gearbox and is connected to the driveshafts extending to the front and rear axles. The RK is a cast iron body, inside of which gears, shafts and a gear shift lever are located. Let's take a closer look at the purpose of each element and its design features. So, this old-style device has the following design:

The following elements are located inside the RK:

drive shaft;
rear axle drive shaft;
front axle drive shaft;
gear;
reduction gear.

Schematically, all these elements look like this inside:

Constructive diagram of the old-style RK

The torque is supplied from the gearbox to the transfer case via the drive shaft. The RC is fixed to the rear wall of the gearbox using connectors. The transfer case is aligned along the outer race of the double-row bearing of the secondary shaft of the gearbox. On the rear wall of the device housing there are parts of the parking brake unit.

The transfer case contains two shafts: drive and intermediate, which are fixed with bearings. The design also includes drive shafts for the front and rear axles of the UAZ Patriot SUV. These shafts are equipped with spur gears, due to which the engagement is carried out. The drive shaft, which has splines at the end, enters the gearbox from the gearbox. The drive shaft of the rear axle, indicated in the diagram as number 10, is located in the same plane as the drive shaft. The shaft is fixed using bearings that ensure rotation. In the structure, between the bearings of the rear axle shaft there is a speedometer gear 5. The intermediate shaft 17 rotates through two bearings, one ball 15 and roller 41. The drive shaft of the front axle 24, equipped with a gear, is located in the lower part of the box structure, the rotation of which is ensured through two bearings 22 and 35 ball type.

In its design, this device is equipped with a lever, with the help of which the physical control of the radio is carried out. The switching mechanism is represented by two rods and two forks, which are located in the upper part of the unit. If it is necessary to engage a lower gear, the driver of the UAZ Patriot exerts physical pressure on the shift lever.

In addition, the transfer case design includes oil seals, seals, flanges, fittings, a safety valve and an oil drain plug. This device is an undemanding mechanism on an SUV, but over time it will require repair and maintenance work. This could be replacing seals, oil, bearings or gears. You can learn about what repairing a transfer case on an SUV is in a separate material, but now let’s look at what disassembling the device is.

Disassembly of the RK

If there is a need to repair the RC on the UAZ Patriot, then this can be done after dismantling the product and disassembling it. Removing the transfer case from the car is not difficult, but labor-intensive, since it is attached to the gearbox using four nuts. After the RC complete with gearbox has been dismantled, you can begin the process of disconnecting and disassembling the transfer case. Let's look at how this is done below:

After the RC is disconnected from the gearbox, you can perform further steps to disassemble the transfer case.
At the next stage, it is necessary to unscrew the four bolted connections, and then remove the unit cover 1.
The gear shift lever should be set to the “neutral” position, then unscrew the 4 bolts and dismantle the gear shift mechanism 2, in the diagram above.
The two screws 7 are unscrewed, after which the parking brake device can be removed.
The nut 5 is unscrewed, while securing the rear axle shaft flange 3 from turning. After unscrewing the nut, you can dismantle the flange with the washer.
The brake mechanism 9 is dismantled, which is attached to the transfer case using bolts 8. After unscrewing the bolts, the mechanism can be dismantled.
The next step involves unscrewing the front axle switch 3, indicated in the diagram below.
Using a special tool, you should fix the flange 7 of the front axle axle in a stationary state and unscrew the nut 9.
Next, you need to unscrew three bolts and remove cover 6 and gasket 10.
Along the perimeter of the device, unscrew the bolts 1 and disconnect the crankcase so that the internal parts continue to be located on the cover. Important! It is forbidden to remove plugs 2 and 4 unless absolutely necessary.
Now you should unscrew bolt 9 in the diagram below and press the rods out of the cover. In this case, you should remove the forks numbered 5 and 7. Be sure to hold the balls 6 and springs 8 so that they do not fall out.
Next, you need to remove the gear complete with the shaft, having first removed the fitting stopper 1.
Covers 19 and 23 are removed, as well as bearings 14 and 25 of the intermediate shaft and the front drive shaft.
Using two screwdrivers, it is necessary to remove the retaining rings and bearings of the intermediate shaft and the front axle drive shaft. Pressing out the shafts should be done using a special wrench or using a mandrel and a hammer.
The nut 24 is unscrewed, after which, using a puller, it is necessary to dismantle the intermediate gear 2 and the inner ring 3 (in the diagram below). If the gear does not need replacement or repair, then it should not be dismantled.
Nut 15 is unscrewed, after which, using a puller, gear 1 of the front axle drive is pressed out. Shown in the diagram below.
If the gear does not need to be replaced, then it is not worth dismantling it.
Bolt 26 is unscrewed, after which cover 1 of the rear drive shaft bearing is removed.
The rear axle drive shaft is pressed out using a hammer. After this, you can remove the retaining ring and dismantle the outer race of the bearing.

Typical faults

Possible breakdowns include the appearance of noise, failure of gears, leaks through seals, and destruction of bearings. Long trips with incorrectly inflated tires lead to these problems. Also, malfunctions often result from the front axle being on for too long. It should only be connected when necessary. If on a UAZ Patriot the transfer case (transfer case) is poorly screwed to the body, this may cause noise.

Poor quality of bearings is one of the problems of this mechanism. Due to poor quality, these parts often fail. Often breakdowns are associated with low oil levels or lack of oil inside.

On a UAZ Patriot car, repair of a new type transfer case may be necessary for the same reasons. Owners report problems with the chain and bearings. However, despite these figures, sales of such vehicles indicate good demand for electric transfer cases. These cars sell much better than the basic versions equipped with a mechanical domestic transfer case.

Purpose and main features.

The UAZ Patriot transfer case is needed in order to evenly distribute torque between the axles of the car. In addition, this device allows you to increase torque at the right moment, for example, to overcome off-road areas. The unit is located immediately behind the gearbox, under the bottom of the car. The connection uses a cardan that transmits force to the front and rear axles. To increase the strength of the structure, the device body is made of thick cast iron. The main elements are located inside: gears, shafts and levers. Let's take a closer look at the description of the main components:

drive shaft;
shaft leading to the rear axle;
leading to the front axle;
gear;
low gear.

Principle of operation

The operating principle of the device is based on the Hall effect, as a result of which there are no moving parts in the device. In the front part of the product, in the cavity, the tip of the solenoid is visible - this is a metal rod with a winding through which a low-current signal is passed.

In the transfer case, a special magnetized disk rotates on a shaft, at a minimum distance from which the device rod is located. Changing the speed of rotation of the disk changes the magnitude of the magnetic flux, which changes the current characteristic in the solenoid. The signal enters the microcircuit, which in turn informs the speedometer control circuit on the car's instrument panel. The operation of the contactless speed sensor of a UAZ vehicle is graphically depicted in the upper part of the figure below.

The difference between the old-style transfer case.

Torque is transmitted to the transfer case from the gearbox using the drive shaft. Centering is carried out along the outer race of the bearing. The parking brake elements are located on the rear wall.

Important elements of the transfer case are 2 shafts: drive and intermediate. They are fixed by a bearing system. The drive shafts are equipped with gears that ensure their engagement.

The design provides for a lever that is directly controlled. The mechanism is made in the form of rods and forks located at the top. If it is necessary to engage a lower range of gears, the driver must directly operate the lever.

In addition, the system contains a large number of small elements, such as oil seals that protect the system from oil loss, auxiliary bearings and gears.

Useful video

The transfer case (transfer case) is an important transmission unit of all-wheel drive vehicles, designed to transmit torque from the engine to the drive axles. Since 2013, production of the UAZ Patriot, equipped with a Hynday Dymos transfer case manufactured in Korea, began. Unlike previous versions, where the driving modes were regulated by a mechanical lever, a more convenient electromechanical control is used here. Subjected to serious loads, the device requires regular maintenance, and in case of breakdowns, timely repairs, which can be done either in a car service center or with your own hands.

Product design

It is a plastic base device that is placed on the gearbox cover and connected to the speedometer drive gear. The operating principle of the element is based on the Hall effect, that is, the rotation speed of a moving part is converted into electrical impulses. The sensor is connected to the gearbox housing using a threaded connection. The photo below shows an example of the device itself, which is installed on UAZ Patriot SUVs.

The cost of such a unit is about 300 rubles, and the service life is about 100,000 km. You can detect that the product is faulty using the speedometer. When the speedometer needle drops to zero while driving and the electronic timer for calculating the total mileage stops, the product should be replaced immediately. In addition, it should be noted that such a malfunction can be either permanent or periodic (that is, the speedometer periodically works and then goes silent). Let's consider what the process of replacing a product on a UAZ Patriot SUV is.

Product replacement

First of all, it is necessary to determine where this element is located on the UAZ Patriot SUV. As mentioned above, the speed sensor is located on the gearbox housing, but where to look for it? You need to look for it under the car in the area where the gearbox is located. The device comes with a terminal with wires, so it is not difficult to find. For convenience, it is better to place the SUV on the inspection hole, and then proceed with the replacement:

First, we de-energize the car by removing the negative terminal from the battery.
After this, you need to disconnect the terminal block from the sensor.
Using a key set to “22”, you need to unscrew the device and remove it.

The sensor is replaced with a new one, after which the element is installed in its place in the same way. As you can see, the replacement process is not particularly difficult. The photo above shows the location of the element on the car.

When tightening, the most important thing is not to overdo it, since it is quite easy to break the thread and you will have to rush to get a new element.

The sensor on the transfer case is made in Korea

Since 2014, Ulyanovsk Patriots began to be equipped with a new Korean-made transfer case. This transfer case is called Hundai-Dymos. And although the box is considered Korean, it is assembled in the same popular China or China. But after a test drive with a new box, you can understand that such a device was really missing for such a car. The main advantages of the Korean distributor include the following factors:

the gear ratio has been increased to 2.56;
in the car interior, the decibels of noise and vibration while driving have significantly decreased, which makes car owners very happy;
The electromechanical control of the transfer case allows you to turn it on by turning the nice-looking regulator shown in the photo below.

Transfer case operating mode switch

Regarding the issue of sensor location, it is easy to get confused. After all, there is only one element on the gearbox, while the Korean transfer case has two devices similar to a speed sensor. The photo below shows the new Korean transfer case and the speed sensor is highlighted in red. Therefore, in order not to be confused, before descending into the inspection hole, remember the type and location of this element on the Patriot with the new transfer case.

Design, purpose and types of UAZ Patriot transfer cases

A fully functional transfer case is usually equipped with off-road passenger cars, such as the UAZ Patriot. Its main tasks include:

transmission of torque between both drive axles in such a way as to ensure good cross-country ability of vehicles;
achieving the torque required to overcome wheel rolling resistance when driving off-road or on inclines;
ensuring stable movement of the car at low speed while the engine is operating in the highest torque mode.

The UAZ Patriot transfer case consists of a cast-iron crankcase in which four shafts are located: drive, intermediate and drive shafts of the rear and front axles, as well as gears and bearings. The torque comes from the drive shaft of the gearbox, to the rear of which the transfer case is attached with connecting elements. The splined drive shaft, which enters the transfer case from the gearbox, is located in the same plane as the rear axle drive elements. The speedometer gear is placed between the two bearings of this drive.

Transfer case device

The old-type UAZ Patriot transfer case and the Daimos transfer case differ primarily in the type of control. In the classic transfer case of the UAZ Patriot, modes are switched by a mechanical lever. The control mechanism consists of 2 rods, 2 forks and a clutch. By manipulating the lever, you can engage all-wheel drive, all-wheel drive with downshifts, and also disable front-wheel drive.

The UAZ Putriot Dymos transfer case uses electromechanical switching. You just need to turn a convenient switch that does not require physical effort, the device with an electric motor does the rest. The Daymos transfer case also differs from the previous one in lower noise and vibration levels, larger dimensions and increased torque. Inside, instead of some gears, a chain is used.

Thanks to the modified design, the gear ratios of the low range increased by 31%. Due to the increased torque, the car can move more confidently off-road. On mechanical transfer cases of the UAZ Patriot, this had to be achieved through tuning. The cost of the car, however, eventually also increased significantly.

Often, owners of Patriots with an old type of transfer case express a desire to replace it with a new Korean one.

This operation is permissible. However, this will require a large-scale workload, including the replacement of a number of parts. Including cardan shafts, handbrake drive, frame cross member for gearbox, fuel lines, wiring and other things.

Let's sum it up

Here's some important information! Some owners set out to replace the old transfer case with a new unit. Is it possible to do this? Installing a Korean unit on a UAZ Patriot is possible, but it will require some work. You can carry out the repair yourself; the diagram will help with this. Here it is necessary to replace the tunnel casing, cardan drives, transmission unit frame cross members, handbrake drive mechanism, electrical wiring and fuel lines.

The latest modernization of the all-wheel drive all-terrain vehicle UAZ Patriot concerned the configuration with various imported components, including a gearbox. New models are equipped with a gearbox from the Korean company Dymos. Accordingly, the speed sensor of the UAZ Patriot SUV differs from a similar part of previous car models. Where is it installed, how does it work, can it be quickly replaced with a new device - all these questions will be discussed below.

Dymos speed meter:

Transfer case repair

Bearings are checked for defects, chips, cracks, track spalling, play and, if necessary, replaced. Oil seals have a rather short nominal service life, a little more than 30 thousand kilometers. But the indicator for replacement is not the mileage, but the leakage of oil protruding in the places where the shafts are located. Accordingly, if a leak is detected, the seal must be changed. Even if the leak is not obvious, but the wear of the working edge of the oil seal is more than 1 mm, or there are chips and microcracks, the oil seal requires replacement.

Gears need to be replaced when they become noticeably worn or crumbled. If you do not promptly replace the UAZ Patriot transfer case gears, the load on the engine will increase or even jam. A particular shaft on which wear of the working surface, threaded connection or splines is detected also requires replacement. The width of the spline cavity on the shaft flange must be at least 4.645 mm, otherwise the flange will need to be replaced. It is also preferable to replace a flange with noticeable damage.

Shift forks should be checked for wear, chips, cracks, bent and replaced if necessary. Dents, cracks and chips on the covers and crankcase are a significant reason for its replacement. However, for minor damage, you can get by by simply cleaning the problem area with a file.

To eliminate excess noise from the UAZ Patriot transfer case, you must first inspect the bearings and seals. Check the suspension bearing and crosspiece (by injection), since a loose cardan can break the transfer case parts over time. Inspect the mounting of the transfer case and engine. If the noise that disappeared after the repair reappears after some time, you need to check the driveshafts. Also, the source of noise in the transfer case when the front axle is disconnected can be a gear operating in idle mode, transmitting rotation to the front axle. Loose nuts should be tightened until they stop, installing missing bushings if necessary.

Upon completion of the repair, it is recommended to replace the oil with fresh one, even if the mileage has not exceeded 30 thousand km.

Dismantling the transfer case

In order to repair the UAZ Patriot transfer case, it is necessary to dismantle and disassemble the device. For dismantling, you will need keys 10, 12 and 17, as well as a flat-blade screwdriver and a syringe screwdriver. Removing the UAZ Patriot transfer case is carried out in the following order.

First you need to install the car on a viewing hole or a lift, thereby ensuring free access to all the necessary parts. Before removing the device, be sure to lower the parking brake lever and set the gearbox and transfer case levers to the neutral position. Next, drain the oil from the transfer case. Disconnect the driveshafts. Before doing this, it makes sense to make notches on the flanges with a chisel, so that the position does not get mixed up during assembly.

Inside the car, you need to remove the right floor panel by unscrewing the screws and sliding it along the direction of the car (1). Remove the decorative cover of the transfer case control lever using a syringe screwdriver (2 – arrows in the photo indicate the cover latches). Unscrew the screws that secure the rubber cover of the lever, and then lift the part along the lever (photo 3 shows the removed cover).

Loosen the terminal bolt at the transfer case shift lever (4) and remove the transfer case shift lever, opening the terminal connection (5) with a screwdriver. From the bottom side of the car, we disconnect the wires from the two sensors (6, 7).

If dismantling the transfer case is done for the purpose of further repairs, it is recommended to unscrew the nuts that secure the shafts, thus facilitating disassembly. Disconnect the handbrake cable (8). We unscrew the 2 bolts that attach the transfer case to the gearbox on the left side. We unscrew the fastening bolt from the top on the right side (10) and a similar one from the bottom. Then remove the transfer case together with the handbrake mechanism (11).

Installing the UAZ Patriot transfer case into place is done in the reverse order. Before doing this, apply sealant to the transfer case area adjacent to the gearbox.

Disassembling the device

Having removed the UAZ Patriot transfer case, we begin to disassemble it. First, unscrew the top cover (1 in diagram a). 2. With the lever set to the neutral position, unscrew the 4 bolts and remove the gear shift device (2 in diagram a). Unscrew 2 screws and remove the handbrake device. Having secured the rear axle shaft (3 on a) from turning, twist the nut (5 on a), after which you can remove the flange and washer. We dismantle the brake mechanism (9 in diagram a), attached to the transfer case with bolts (8 in a).

At the next stage, the front axle activation sensor (3 in diagram b) is unscrewed. Using a special tool, secure the flange in a stationary position (7 on b) to the flange of the front axle axle, and unscrew the nut (9 on b). Next, dismantle the cover (6 on b) with the gasket (10 on b) by unscrewing the three corresponding bolts. Along the perimeter of the unit, you need to remove the bolts (1 to b) and disconnect the crankcase so that the parts located inside continue to be on the cover. It is important to remember that it is not recommended to remove the plugs (2 and 4 on b) unless absolutely necessary.

Transfer case maintenance

Like any other vehicle device, for stable operation the UAZ Patriot transfer case requires systematic maintenance, since the SUV is often operated in difficult conditions and its components are subject to increased loads. It is necessary to regularly check the transmission oil level and replace it on time.

The manufacturer's instructions on the frequency of replacing the UAZ Patriot transmission are contained in the user manual supplied with the vehicle. For new cars that have recently left the assembly line, the procedure for the initial change of transmission fluid is prescribed no later than after 5 thousand km. mileage Such a short interval is due to the fact that during the grinding of new parts to each other, which occurs during the running-in of the car, there is a high probability of the appearance of metal particles that can negatively affect the durability of the mechanisms.

Further rotation of the transmission oil is recommended after every 30 thousand km (about 2 years of driving) + checking every 15 thousand. However, you need to understand that the duration of the intervals between changes may depend on the operating conditions of the vehicle and the quality of the product poured into the transmission.

Which oil is better to use?

Using a high quality product, recommended by the manufacturer or equivalent, is essential to ensure proper vehicle performance and long life of its parts. The UAZ Patriot operating manual recommends the use of oils with different performance indicators for certain transmission components. However, in practice, it is not very advisable to purchase three types of liquid at once, especially since it is sold in containers of 1 liter or more. and you will have significant balances.

What experts recommend pouring into all transmission units

Oil

For what

The volume of oil required for the UAZ Patriot transfer case, as indicated in the manual, is 0.7 liters, for axles - 2.7 liters (1.4 for the front and 1.3 for the rear) and 2.5 liters for the gearbox. Accordingly, if you decide to use the same transmission for all components, you will need 6 liters of oil.

The oil in the transfer case must be filled to the bottom edge of the filler hole.

The level is checked with a dipstick that should be equipped on the car. It should be taken into account that active use of the car can lead to a decrease in the oil level to 8 mm relative to the specified level. In this case, there is no need to level the oil level, since its total volume will ensure proper operation of all components.

Oil change procedure

Before this, you need to drive about 10 km so that the liquid in the system liquefies when heated and quickly drains. Having driven the car into the pit, we find the drain and filler holes, and install a container under the drain into which the waste will flow. We clean the surface adjacent to the indicated holes from dirt. Then unscrew the filler plug with a wrench to relieve pressure.

Unscrew the drain plug, being careful not to get burned by the hot oil. We wait until the waste has completely drained, after which we tightly tighten the drain plug and fill in fresh oil using a technical syringe until it begins to flow back. Don't forget to tighten the filler cap at the end.

Along with changing the oil in the transfer case of the UAZ Patriot, it is recommended to replace it in the gearbox. After changing the oil, you need to drive the car for several kilometers, then drive it back into a pit or overpass and inspect the transmission for leaks. Having discovered an oil leak, you need to identify the cause and eliminate it by tightening fasteners or replacing faulty oil seals, cuffs and plugs. All key transmission mounts should be checked regularly and tightened if necessary.

UAZ Patriot transfer case parts are designed for operation in aggressive conditions. Therefore, they are characterized by increased strength. However, its proper service life ultimately depends on how carefully the owner follows the maintenance instructions.

Untimely oil changes or ignoring signs of a transfer case malfunction can lead to a decrease in the vehicle's maneuverability, controllability and safety, as well as to serious breakdowns that will entail expensive repairs.