UAZ-31512, UAZ-3741, UAZ-3303, UAZ-2206, UAZ-3909 general information (UAZ since 1985)

Removing the gearbox from cars of the UAZ-3741 family

Removal is carried out in the following order:
1. Drain the oil from the gearbox and transfer case.
2. Remove the clutch release fork.
3. Remove the clutch release bearing cap and disconnect it from the bearing lubrication hose.
4. Disconnect the gearshift links from the gearshift mechanism and transfer case.
5. Support the engine from below with a jack or other device.
6. Unscrew and disassemble the rear engine mounts.
7. Disconnect the cardan shaft flanges.
8. Disconnect the parking brake cable.
9. Disconnect the speedometer flexible shaft.
10. Remove the four nuts securing the gearbox to the clutch housing.
11. Pull the unit back until the input shaft exits the clutch housing.
12. Lower the implement down.

Install the unit on the car in the reverse order.

Disconnecting the gearbox from the transfer case
1. Place the machine vertically on the parking brake drum.
2. Engage direct gear in the transfer stub.
3. Turn away three nuts of hairpins and two bolts of fastening of a transmission to a distributing box.
4. Lifting a transmission up, disconnect it from a distributing box.
5. After removing the gearbox, the transfer case remains on the gasket, the suspension plate, the second gasket and the thrust ring of the bearing of the intermediate shaft of the gearbox.

Despite the fact that the Loaf is a fairly old car that has been on the market for several decades, starting from the 60s of the last century, the car still has a lot of components. At the same time, each system needs appropriate care, timely maintenance and repair as needed. Among the important components, the role of which becomes most noticeable in the winter, it is worth highlighting the heater. It cannot be said that the stove on the Loaf is some kind of modern or high-performance. Many complain about its low level of effectiveness. And this applies to the rear and front stove equally. Therefore, the equipment is changed quite often. But it would not be superfluous to study the device, the design of the Loaf's oven equipment, and also study the connection diagram of the electrical component, since the installation itself does not cause great difficulties.

The design of the stove UAZ Loaf.

Before getting acquainted with the scheme of the UAZ Loaf stove, you should study the main functions and design features of this equipment. It is important to note that in the case of the Loaf, a pair of stoves are used, which are divided into back and front. Since most motorists drive alone or only with a front passenger, they focus on the front system. As for the rear equipment, it is preferable to replace it with an autonomous heater, which is much more efficient in coping with its tasks. The task of the stove on the Loaf is no different from the heaters on any other car. That is, here the system exists to maintain the optimum temperature inside the vehicle. It is responsible for heating mainly in winter, and also works as a ventilation system, supplying air under the set due to the motor. Currently, most Loafs are operated with the NAMI heating system, which is characterized by increased productivity and decent efficiency indicators. Structurally, 3 main components of furnace equipment can be distinguished. The loaf heater consists of:

• radiator;
• fan;
• a device designed to distribute air flows.

The heater tap deserves special attention, which allows you to turn on and off the circulation of the coolant, thereby switching from the heat supply mode to the normal airflow of the passenger compartment with a fan. The oven system can operate in 2 modes:

• intake and supply of fresh air;
• recycling.

In the second mode, the temperature inside the cabin rises. To achieve an increase in temperature, it is necessary to close the air intakes, and then open the damper or heater faucet. If the motorist only needs fresh air blowing, then the manipulations are carried out in the reverse order. It is necessary to close the faucet of the stove, and open the air intakes.

The corresponding control unit is responsible for controlling the furnace system. The adjustment is assigned to the stove tap, which can acidify, jam and leak. In this regard, it often has to be changed. And not infrequently, instead of a conventional automobile crane intended for the UAZ Loaf, motorists use plumbing equipment assembled according to a special scheme using adapters. In practice, it works better, longer and more efficiently than a standard crane.

Typical malfunctions

The stove used in the heating system of the UAZ Loaf car is characterized by several breakdowns that owners often have to deal with. The result of malfunctions is the failure of the furnace equipment, that is, the stove ceases to perform its functions. Heating stops, which leads to corresponding unpleasant situations during the winter period of operation of the Loaf. There are several main reasons why the stove on the Loaf may not heat up:

• damage has appeared in the channels intended for the passage of streams of heated or still cold air;
• there was an antifreeze leak;
• out of order stove tap ;
• the system is contaminated, which provokes a decrease in temperature when heating the cabin;
• a leak has formed in the heater faucet;
• the valve for the engine of the Loaf's heating system burned out.

If the system is completely out of order, repairing it is not always rational and financially feasible. When the Loaf stove has served for a long time, and at the same time it works frankly poorly, it will be the most correct solution.

Equipment replacement

If you decide to replace the heater yourself, you should first familiarize yourself with the scheme of the UAZ Loaf stove for connecting the electrical component. Mounting the equipment itself, fixing it in a conditional engine compartment located inside the car, is not difficult. But even here certain rules and recommendations should be followed. The process will be considered using the example of using NAMI equipment, which is characterized by better performance, and also boasts the presence, which is not in the regular Loaf heater.

• The first step is to drain the antifreeze from the system, and also disconnect all existing wiring. To make it easier to reassemble and connect, all your steps can be recorded or marked with wires, pipes and hoses;
• It is required to disconnect the console from the shield, then remove the heating unit, remove the air intake hatch, remove the seal and thoroughly clean all the openings that have opened;
• Take measurements under the air filter by attaching its housing to the surface. Next, make a few mounting holes. Just do not use a drill with a diameter greater than 3.2 millimeters;
• At the installation site, apply a layer of a quality automotive universal sealant that is resistant to moisture and sudden temperature changes. Make the layer big enough. Install the filter housing and fix it. The filter itself can already be inserted into its seat;
• A new heater is installed in the salon. It is fixed with studs, nuts and an M6 bolt. Fasten everything as securely as possible;
• Then the console is installed, the entire structure is mounted on self-tapping screws;
• Then you can start connecting the control rod and fixing it;
• Connect all pipes through which antifreeze passes. For reliability, it is recommended to tighten them with clamps;
• Do not forget about the channels that allow you to blow the windows, avoiding fogging during the operation of the car in conditions of high humidity or precipitation. Windshields should be on every car. Whether it's the latest generation Mercedes or the good old UAZ Loaf;
• The installation is completed by connecting the electrical component. It has its own connection scheme, which should be considered separately.

In fact, there is nothing particularly difficult in changing the standard heating system at Loaf, and installing more efficient and productive equipment in place of the old stove.

The system will not be able to work and heat your Loaf if it does not receive power. There is a special scheme for connection. By acting consistently and carefully, you will be able to power the new stove without outside help and enjoy the efficient operation of the heater.

• First, choose a place to place the mass. The black wire is responsible for ground. It is fixed on any metal surface convenient for you. It is best to do mass on the body;
• The positive wire is next. When connecting it, first disconnect the minus from the battery so that the machine is not energized during the work;
• Plus, it is recommended to enclose in a corrugated shell. Then the wire is pulled to the safety block, that is, to the block on the Loaf;
• Please note that there are 4 fuses on the car in its block. The last, that is, the fourth, is constantly energized. You should connect to any of the first three. Only make the connection from above, in front of the standard fuse in the block;
• In principle, this connection of the electrical circuit can be considered complete. Be sure to first check the operability of the furnace equipment.

It is safe to say that the heating system used on UAZ Loaf vehicles has a fairly simple design and layout. Therefore, experienced motorists who are accustomed to doing maintenance, repairs and some modifications with their own hands should not have any problems understanding the Loaf heater. But it is extremely important to constantly monitor its performance, carry out preventive measures, monitor the condition and amount of coolant. Pay particular attention to the weakest areas of the stove. The owners of Loaves themselves include regular faucets to them. The faucet often turns sour, jams and leaks. This is due to the long downtime of the faucet, which drivers simply forget to open periodically for purely preventive purposes.

About the book: Instruction. 1976 edition.
Book format: pdf file in zip archive
Pages : 129
Language: Russian
The size: 6.5 mb.
Download: free, without restrictions and passwords

This Operating Instructions for UAZ-452 vehicles is intended for personnel directly related to the use and storage of UAZ-452 vehicles and its modifications. Vehicles of the UAZ-452 off-road family with front and rear drive axles are designed for operation on roads of all classes. Ulyanovsk Automobile Plant produces cars of the following models:

Vans UAZ-452 and UAZ-452E intended for the transportation of industrial and food products. The all-metal closed wagon-type body is divided by a partition into the driver's cab and the cargo compartment. Loading and unloading can be done through the side and rear double doors. The UAZ-452E van differs from the car only in shielded electrical equipment.

Sanitary vehicles UAZ-452A and UAZ-452AE intended for transportation of patients and maintenance of ambulance stations. They have the same body as a van, with a sanitary compartment separated by a partition. The sanitary compartment has side and rear double doors. Stretcher patients are admitted through the back door. The UAZ-452AE vehicle has shielded electrical equipment.

Bus UAZ-452V designed to carry 10 passengers, not including the driver. Passengers boarding is carried out through the side door of the passenger compartment of the body.

Trucks UAZ-452D and UAZ-452DE are intended for wide use in the transportation of national economic goods. The driver's cab is double, all-metal, two-door, closed type. The platform is wooden, with three folding sides. The vehicle has shielded electrical equipment.

In order to fully use all the qualities of cars, it is necessary to comply with all the requirements set forth in this Instruction. Of particular importance are the factory instructions for running-in, which to a large extent determines the life of the vehicle.

1. Before preparing the vehicle for operation, the driver and mechanic must fully study this Manual.

2. If the car was in storage, then it is necessary to perform the work specified in the subsection “Removing the car from storage”.

3. For normal operation of the engine, A-72 or A-76 gasoline is required. When working on leaded gasoline, it should be borne in mind that it is highly toxic and causes poisoning. Leaded gasoline is colored yellow-orange or blue-green to distinguish it from regular gasoline.

4. It is obligatory to drain water from the cooling system through two taps with the radiator cap removed and the heater tap open

5. After starting a cold engine, do not immediately give it high speed. Do not start driving with a cold engine. The temperature of the coolant must be maintained within 80-90 degrees Celsius.

6. When driving on dry hard roads, turn off the front drive axle, and when driving for a long time on dry hard roads, it is recommended to turn off the front wheels. When the front wheels are off, it is not allowed to turn on the front drive axle.

7. For better running-in of engine and chassis parts during the first thousand kilometers of run (during the running-in period of the car), it is necessary to strictly follow all the instructions in the “Running in a new car” subsection and, in particular, not to exceed the speeds specified in this subsection.

8. For ease of maintenance of the engine, the sides of the hood are removable.

9. It is necessary to constantly monitor the water level in the radiator. It should be remembered that when the heater is turned on, the water level in the radiator drops. Therefore, after filling the heater radiator, it is necessary to add water to the cooling system. The absence of water in the upper tank of the radiator must not be allowed, as this will lead to the failure of the water temperature sensor placed here.

10. The plant draws the attention of consumers to the need to periodically check the external bolt fasteners and tighten them both during the break-in period and during further operation of the vehicle.

The plant is constantly improving the design of its vehicles, in connection with which the latest design changes that do not affect the rules of operation; may not be reflected in this edition of the Manual.

Rear axles of the same design were installed on cargo-passenger cars of the wagon layout of the UAZ-452 family and their modifications. The rear axle device can be divided into crankcase, main gear, differential and axle shafts.

The main characteristics of the rear axle UAZ-452.

The number of teeth of the final drive gears:
leading - 8
slave - 41
- Dimensions of roller bearings, mm:
front double bevel, drive gear - 80x35x57
conical, differential - 90x50x25
rear roller bearing with cylindrical rollers, pinion shank - 52x20x15
- The size of the epiploon of the drive gear of the final drive, mm: 68x42X15
- Thickness of the gaskets included in the package installed between the end of the crankcase and the cover of the double tapered bearing, mm: 0.3, 0.5
- Thickness of shims in a package installed between the inner rings of a double tapered bearing, mm: 0.1, 0.15, 0.25
- Thickness of the gasket installed in the crankcase connector with a cover, mm: 0.12
- The volume of oil poured into the crankcase to the level of the lower edge of the oil filling hole, l: 0.75
- Mass of the rear axle without wheels, kg: 98

Crankcase and casings of the semi-axes of the rear axle UAZ-452.

The rear axle housing is split in the vertical plane. It consists of two parts connected by bolts and nuts with spring washers. A gasket is installed in the connector of both parts. A half shaft casing is pressed into each half of the crankcase and additionally secured with electric rivets.

Flanges are welded to the casings by butt welding, on the ground necks of which the gland rings are pressed and wheel hub bearings are installed. The bearings are secured with nuts and locknuts. The threaded ends of the flanges have rectangular grooves for locking the washer and the lock washer of the wheel bearing nuts.

Both flanges have six threaded holes for mounting brake shield bolts. To prevent the increase in pressure of the rear axle when it is heated during operation, a breather is installed on the left casing of the axle shaft, connecting the internal cavity of the crankcase with the atmosphere.

The main gear of the rear axle UAZ-452.

The main gear of the rear axle consists of one pair of bevel gears with a spiral tooth. The pinion ring gear is integral with the shaft, which is placed between the front double tapered bearing and the rear cylindrical roller bearing. The rear bearing is pressed onto the end of the drive gear, the end of which is pierced in four places.

In this regard, when disassembling the rear axle, you must first disconnect the crankcase halves and remove the differential with the driven gear assembly. Then remove the drive gear with bearing assembly. When assembling bridges, all operations must be done in reverse order. If this order is not observed, the failure of the rear bearing with cylindrical rollers is inevitable.

The outer ring of the rear roller bearing is installed in the hole of the bearing seat of the axle housing. The front double tapered bearing is mounted on the front end of the drive gear. The inner ring of the bearing, located at the ring gear, is pressed onto the smooth neck of the gear. The inner ring of the other bearing is mounted on the gear neck with a guaranteed small clearance, which makes it possible to easily remove the bearing during adjustment, and also allows for reliable tightening of the inner rings.

The outer ring of the double tapered bearing, which has two raceways, is pressed into the front of the crankcase until it stops. Between the end face of the outer ring of the double tapered bearing and the crankcase, a ring is installed that regulates the correct position of the drive gear. The thickness of the adjusting ring can be equal to 1.28; 1.33; 1.38; 1.43; 1.48; 1.53 mm.

From the outside, this ring is stopped by a cover, which is fastened with six bolts with spring washers to the crankcase. The drive gear oil seal is installed in this cover, which prevents transmission oil from escaping from the axle housing.

Between the ends of the crankcase and the bearing cover there is a package of cardboard sealing gaskets, the thickness of which is selected 1.3 times greater than the actual distance between these ends. Between the inner ring of the double tapered bearing and the flange of the cardan shaft on the drive gear, there is an oil squeegee ring with a helical groove with a left-hand thread.

The parts mounted on the drive gear are tightened with a nut. The nut tightened to failure is locked with a cotter pin. With the help of a flange, the drive gear is connected to the rear end of the rear driveshaft. A stamped deflector is spot welded to this flange to protect the seal from dirt and damage. Between the inner ring of a double tapered bearing there is a spacer ring and shims that regulate the tightening of this bearing.

The driven gear of the final drive is attached to the pinion box with ten bolts using a flange with a centering hole, which ensures its reliable and correct fit on the pinion box. The driven gear flange has ten evenly spaced bolt holes.

Each hole is provided with an eccentrically located cylindrical recess for placing the bolt head in it and locking it from turning when the nut is tightened. The pinion bolt is cold formed from chromium steel and heat treated. A slotted nut is screwed onto the threaded part of the bolt and locked with a cotter pin.

To ensure lubrication of the double tapered bearing, an upper oil inlet hole and a lower oil outlet hole are drilled in the crankcase neck. The oil supply hole is located opposite the driven gear.

When the gear rotates, the oil entrained by it is injected into the oil supply hole, through which it is fed to the groove on the outer ring of the bearing, and then through the holes located between the raceways of this ring, it enters the cavity between the inner rings of the bearing and fills it, thereby ensuring its normal work. Oil flows into the crankcase through the grooves in the gasket pack and in the bearing cap, and then through the oil drain hole.

Rear axle differential UAZ-452.

The differential consists of four pinion gears, two side gears, a pinion box, two side gear thrust washers and two pinion axles. On the axes of the satellites in their middle part, grooves are provided, with which the axes enter one into the other, thus forming a detachable cross. The ends of the axles are rigidly fixed in the holes of the satellite box.

The teeth of the satellites are in constant engagement with both side gears installed freely in the holes of the satellite box. The semi-axle gears are connected to the semi-axes with the help of splines. To ensure better running-in, the axes of the satellites and satellites are phosphated. For the same purpose, the support washers of the side gears are coated with a thin layer of copper.

The satellite box is detachable and consists of two halves cast from ductile iron and connected with studs and nuts. From turning the nuts, they are locked in pairs with lock washers, the antennae of which are bent on the verge of the nuts. On both halves of the satellite box there are grooves for oil to enter the internal cavity for lubricating all rubbing surfaces of the differential parts. The satellite box rotates on two tapered roller bearings installed in the crankcase and crankcase cover.

The holes for the pinion axles in both halves of the pinion box are machined as an assembly. Therefore, a serial number is placed on both halves. When assembling the differential, the serial number of both halves must be the same.

The preload of the differential roller bearings is regulated by gaskets located between the ends of the satellite box and the inner rings of the differential bearings. The same gaskets regulate the position of the main gear driven gear, that is, the size of the side clearance, as well as the size and location of the contact patch.

Half shafts of the rear axle UAZ-452.

The rear axle shafts are fully balanced type, they transmit only torque. With one splined end, the axle shaft is connected to the side gear, at the other end there is a flange, which is rigidly connected to the rear wheel hub with six studs and nuts with spring washers. The axle shaft flange is centered relative to the hub with a collar.

Maintenance of the rear axle UAZ-452.

Maintenance of the UAZ-452 rear axle during operation consists in maintaining the required level and timely change of transmission oil, checking seals, timely detection of axial clearances in the final drive gears, periodic cleaning of the breather, and tightening all fasteners.

The oil level in the axle housing must not be lower than the lower edge of the oil filler hole. When changing, the oil is drained through the oil drain hole located at the bottom of the crankcase. If the oil is heavily contaminated or metal particles are found in it, the crankcase should be flushed with kerosene before filling with fresh oil.

To flush the rear axle, pour 1-1.5 liters of kerosene into the crankcase, raise the wheels, start the engine, turn on the gear and let the engine run for 2-3 minutes, then immediately drain the kerosene and fill in fresh oil. With timely and proper care, the service life of the rear axle increases.

The device and repair of the rear axle UAZ

• The device and repair of the rear axle UAZ
• Rear axle device UAZ
• Rear axle adjustment
• Increased driving noise
• Oil drips
• How to remove the rear axle UAZ

The rear axle is the mechanism of the machine that connects the wheels of the rear axle and serves as its support. The bridge is attached to the frame of the machine or to its body using a suspension.

Rear axle device UAZ

The UAZ rear axle device includes many elements. The main parts of the design: differential, axle shafts, gearbox.

Differential according to the device, it can be with a single main gear and with an additional wheel gear. Wheel adjusters transmit torque to the hubs, they are located at the ends of the shaft. The wheel bearings are supported by the regulator housing.

Gearboxes designed to provide ground clearance, look like meshed gears. main gear consists of a conical tooth, a bearing assembly, a pinion and a four-gear drive. Satellites provide smooth gear shifting.

Crankcase - container for lubricating fluid, has two holes. Grease is needed for the wheel regulator. The rear transducer support includes a cover, dirt protection, axle shaft covers. The driven rear gearbox is located on the shaft. The reducer is fixed in the grooves of the shaft, its ends are equipped with couplings.

Rear axle adjustment

Adjustment of rear-wheel drive parts is carried out in case of breakage and replacement. At the same time, it is especially important rear axle gearbox, its inspection and adjustment.

When adjusting, the following actions are performed: the end play of the differential between the gearbox and the rings is checked ( desired value 3.5 – 4 mm), after the differential is covered with a gasket, a reservoir cover. The bearings roll into the correct position.

The bearings of the rear gear gear are inspected: the details of the guide are fixed on the driven gear, the tail ends are rubbed, the roller assemblies and gaskets between the rings are checked. The main gear is checked.

When checking and debugging the gear head wheel, longitudinal play is not appropriate. To reduce tension, spacers can be added between the bearings. All spare parts are splinted after adjustment and installation. To adjust the backlash and the location of the main gear, a design with debugged bearings and a gasket at the junction with the cover are installed in the heat exchanger. The distance between the gear teeth is set from 2 to 6 mm.

A set of gaskets is placed between the valve of the bearing assembly, the wheel and the support. The gap (setting thickness) should not exceed 1.3. The bearing assembly with the cuff is bolted. A differential is installed in the oil pan, then oil seals. Inspect the cardan flange and oil outlets. Replace all worn parts with new ones.

Possible causes of malfunctions and their elimination

Increased driving noise

There can be several reasons for hearing noise when driving or when turning a car. Carefully inspect the rear axle of the UAZ, all the details of the device.

Gear teeth worn out. In this case, it is not recommended to adjust the position of the parts: the transmission may jam. Defective parts must be replaced. The problem is in the bearings of the drive gear or differential. In both cases, the details change.

Loose fastening drive gear with differential. Tighten the fixing bolts.

Badly tightened drive gear bearings. Tighten the nut until tight.

Poor gear engagement. If there is no wear on the teeth, adjust according to the contact mark.

Lack of oil in the crankcase. Top up the required amount.

Knocking noise when pressing throttle pedal

With a creak and noise when cornering or slipping, inspect all parts of the differential, replace the unusable ones with new ones. Loud thud when pressing the pedal control throttle, indicates wear on the main gear or differential parts, they need to be replaced.

If the splines of the semi-axes are unusable– Replace semiaxes.

Oil drips

Oil leakage is due to several reasons.

Worn cardan shaft parts: cuff or flange. The details are changing.

Exceeding the norm of oil in the crankcase. Check the lubricant level, drain the excess.

If the safety valve is dirty- it needs to be cleaned.

Deformed gasket and weak fastening of the crankcase cover. The gasket needs to be replaced, the fastener needs to be tightened.

How to remove the rear axle UAZ

Work on removing the UAZ rear axle for repair is carried out on a lift, preferably together. The sequence of actions is as follows:

After inspection and repair, the unit is assembled. The fastening of the ladders is tightened after the wheels are installed.

Assembly and disassembly of the rear axle on UAZ

To assemble the rear axle, you must carefully follow the following sequence of actions:

1. Install a shim kit between the main gear front bearing cap and the crankcase.
2. Install cover assembly with cuff and tighten with bolts.
3. Put the flange and washer, tighten the nut until its holes match the slots of the gear shank, then you need to cotter.
4. Install the differential with all its parts in the axle housing, a gasket is needed between the housing and the cover. The cover must be in such a position that the spring pads are in the upper position relative to the axle.
5. Tighten fasteners.
6. Turn the drive gear to see if it is sticking in the already assembled bridge.

Adjustment and inspection must be carried out regularly, without leading to repairs. Check seals, oil level, valve cleanliness, fastening of all parts.

Eliminate backlash in the gears in time. The good condition of your car is your safety.

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About UAZ

Device of this node

The Soviet SUV UAZ 469, produced by the Ulyanovsk Automobile Plant, is unique in its own way. The diagram of the rear axle of the machine is shown in fig. 1. The design includes the following key components and assemblies:

• 1 - protective cover;
• 2 - roller bearing of the differential device;
• 3, 8 - corrective automatic pads;
• 4 - tail part of the drive gear support;
• 5 - correction ring;
• 6 - oil extractor holder;
• 7 - nut;
• 9 - front gear of the rear axle;
• 10 - head bearing support;
• 11 - hydro-resistant washer of the axle shaft of the gear wheel;
• 12 - gear element.

The device and elimination of breakdowns of the rear axle

The rear axle is a support, inside it is the main gear of the axle shaft, the differential. It can be of two categories: with a single final drive or an additional wheel. Wheel regulators, which increase the torque and transmit it to the hubs of the conductive wheels, are located at the ends of the beam.

The wheel roller bearings are supported by the governor housings. Wheel reduction gears provide huge ground clearance and are gears meshed inside. The main gear is bevel, with a spiral tooth, bearing assembly, which has a main gear and a conical drive with 4 satellites. The satellite is a gear wheel, compact, simple, rarely fails, contributes to quick, easy gear changes.

The crankcase has a drain and filler hole, it contains a certain amount of oil for lubricating the wheel hydraulic regulator.

The rear transducer support is detachable and consists of elements such as a cover, protection against contamination, pressed-in axle shaft covers. Its dimensions are reduced, the gear ratio is up to 2.77.

The driven rear axle reducer is mounted on the shaft. It is installed in a roller bearing and bushing, tightened by means of a nut, fixed in the groove of the shaft. The ends of the gearbox shafts have movable couplings that help to group, separate the shafts from the wheel hubs, if necessary.

With the clutches disconnected, the UAZ 469 becomes rear-wheel drive. This is useful on good paved roads. When driving on impassable terrain, disabling is impractical. You can disconnect-connect the hubs from the beginning of the operation of the quick response clutch or the hub cam. In this case, climbing under the bottom of the car is not required.

Features of dismantling the assembly

When removing the rear axle, you need to unscrew the nut of the tail device, drop the washer, counterflange, cover of the front roller gear assembly, press the gear assembly with bearings out of the oil cooler of the rear of the car.

This circuit is great for parsing a differential device. The next step is to unscrew the splines connecting the driven gear with the satellite box, reset it. Divide both parts of the box, pull out the gears, planetary wheel rods, support nuts. Assessing the disassembly, pay attention to the integrity of the gear teeth. If they are damaged, the part must be replaced. To remove the rollers, outer, inner rings, special tools are required. Strictly study and understand the disassembly sequence so that you can accurately follow all the steps in reverse order when reassembling.

When inspecting the oil ring, check for surface irregularities. If yes, process to a thickness of 5 mm. The same - with the cardan flange. Grinding height up to 53 mm. Rinse protective surfaces. Blow out oil lines. Change drive design details, half shafts, if there are scuffs, severe wear.

Nuances of installation and adjustment

The assembly (diagram) of the differential drive design is carried out as follows.

1. Connection of both boxes of satellites depending on the case serial number.
2. A crosspiece is inserted into the left box of satellites.
3. Place the assembly gear in the left box.
4. Lubricate the differential units with gear oil (gear axles, pinion gears, axles, thrust washers).
5. Fix the necks of the gear rings of the semi-axes with support washers.
6. Satellites must be strengthened on the axis of the disconnected cross.
7. Carry out the same actions with the right box.
8. Tighten the parts of the boxes, insert the driven wheel of the base gear.

The master sorts out the unit

Turn the gears of the axle shafts of the mounted differential using splines with a force of not more than 59 N.
Adjustment of the drive structure elements is carried out when they are replaced.

1. Fasten the inner rings of the bearing assemblies of the differential to the necks, the end play between the box and the rings should approach a value of 3.5-4.0 mm.
2. The installed prefabricated differential is closed with an auto gasket, a reservoir cap. Roll on the bearings to set the correct position. Fasten the lock of the heat exchanger.

Mounting and adjustment of the ball bearings of the conductive gear of the rear converter.

1. Fixing the elements of the guide on the main gear.
2. Tail end lapping with guide element.
3. Location of spacers and spacers of the roller assembly between the inner races.
4. The main fastener of the adjusting ring of the main gear.

All intermediate actions, punching is shown by the diagram in fig. 2. This scheme describes all the nuances in the most detail.

1. When adjusting the head gear assembly, there should be no longitudinal play, the spring dynamometer will show the force. Indicators for new parts - 15-30 N, for run-in - 20-35 N. To reduce the tension when installing bearings, you can add gaskets. To increase - remove.
2. The adjustment has come to an end, we fix all the parts in their places, we fasten them with high quality.

The backlash adjustment and the location of the central gear gear are carried out as follows.

1. The potential is installed in the heat exchanger with debugged prefabricated roller bearings, their separation gasket with a cover reinforced with a bolt.
2. The distance between both teeth is set: 0.2-0.6 mm. The backlash is adjusted by taking into account the number of oil seals of the driven gear: if their number decreases, the gap must be increased, and vice versa. When rearranging the gaskets, the tightness of the potential elements will not be violated only when the number of gaskets does not change.
3. The scheme of engagement of gear wheels along the contact patch is shown in fig. 3.

The fuel supply system for UMZ-4178, UMZ-4179, UMZ-4218, ZMZ-4021 and ZMZ-4104 engines on UAZ-3741, UAZ-3962, UAZ-3909, UAZ-2206, UAZ-3303 vehicles is forced, with fuel supply by fuel diaphragm pump.

Fuel supply system UAZ-3741, UAZ-3962, UAZ-3909, UAZ-2206, UAZ-3303, installation and maintenance.

Fuel tanks.

Both the main and the additional ones have a fuel intake pipe with a collapsible mesh filter, a plug for draining sediment and fuel, and a filler cap. The fuel tank cap is sealed with a rubber gasket and has inlet and outlet valves. From the fuel tanks it is necessary to periodically drain the sludge and rinse them. For flushing, the tanks are removed from the car. Flushing should be done with clean gasoline.

The capacity of the main fuel tank is 56 liters. The capacity of the additional fuel tank on UAZ-3741, UAZ-37411, UAZ-3909, UAZ-39094, UAZ-3962, UAZ-2206 cars is 30 liters, and on UAZ-3303, UAZ-33031 and UAZ-33036 cars - 56 liters . In addition, on UAZ-39094 and UAZ-3303 vehicles and their modifications, it is possible to install only one main tank.

Fuel filter-sump.

It serves to filter fuel from mechanical impurities and water. There is a stopper in the sump to drain water and dirt. To remove the filter element for washing it, it is necessary to unscrew the fittings and bolts.

Before the winter season of operation, the fuel filter-sump must be removed, the filter element washed in gasoline. It should not be disassembled. After washing, blow with a compressed pressure of not more than 98 kPa (1 kgf/cm2) so as not to cause damage to the filter plates. Periodically drain the sludge of dirt and water through the drain hole.

Fuel pump.

Diaphragm, type B9V (451M-1106010-30, 451M-1106010-40) or 2105-1106010-50, or 900-1106010, is installed on the left side of the engine block. The fuel pump has a lever for manual pumping of fuel when the engine is not running. The pump housing has a hole for ventilation of the cavity under the diaphragm.

If a fuel leak is detected from this hole, the diaphragm should be replaced. When assembling the pump, tighten the head fixing screws with the diaphragm depressed to the lowest position using the manual pumping lever.

Numbers and designation of parts of the fuel pump B9.

Numbers and designation of parts of the fuel pump 2105-1106010-50.

Periodically check the fastening of the pump to the engine and the tightness of the fuel line connections. Rinse the strainer and remove dirt from the pump head.

Fuel fine filter.

Installed on the left side of the engine in front of it. The filter consists of a housing, a filter element, a sump cup, a rubber gasket, a spring and a bracket with a wing nut. The fuel fine filter must be periodically disassembled to clean the sump and filter element.

Carburetor and its control drive.

On the UMZ-4178 and UMZ-4179 engines, a carburetor is installed, on the UMZ-4218 engine - K151E, on the ZMZ-4021.10 engine - K151U, on the ZMZ-4104.10 engine -. The design of the carburetors is the same, with the exception of some metering elements. The carburetor has a semi-automatic system for starting and warming up the engine, and an autonomous idling system with a forced idle economizer (EPKhK).

The carburetor throttle control pedal during operation may require adjustment, the purpose of which is to ensure full throttle opening and a comfortable pedal position. When using the manual throttle, and to fully close the air damper, press the throttle pedal to relieve the manual actuator from excessive effort.

The position of the pedal and the degree of opening and closing of the throttle are adjusted by turning the lever on the pedal shaft. The adjustment procedure is as follows: disconnect the return spring and loosen the lock nut on the pedal shaft, place the pedal all the way to the sloping floor (the position corresponding to full throttle opening), holding the shaft lever in the full throttle position, tighten the lock nut, attach the spring.

If the carburetor throttle closes and opens fully and the pedal is in a comfortable position, the adjustment is complete. Lubricate the manual control rods of the carburetor as necessary with grease, for which you must first remove them from the car and remove the old grease.

Air filter.

Dry type with a replaceable filter element made of synthetic non-woven material, mounted on the engine on the right side in front of the carburetor and connected to the latter by means of a rubber coupling fixed to the carburetor with a wire clamp.

Air filter maintenance consists in cleaning the filter element every 8,000 kilometers. When operating the vehicle in high ambient air conditions, clean it after 1,000 kilometers or when the engine power is reduced.

The filter element may be cleaned no more than 15 times in the following ways: rinse with water with the addition of synthetic detergents, followed by rinsing, lightly squeezing and drying, blowing or cleaning by shaking. Do not operate a filter with a damaged sleeve. It is mandatory to replace the filter element in the presence of breakthroughs or burns, after 100,000 kilometers of run, when the maximum allowable number of cleaning times is reached.

Inlet pipeline.

Located on the right side of the engine. The lower part of the intake manifold under the carburetor is heated by exhaust gases, which improves fuel evaporation. The inlet pipeline must be periodically cleaned of resinous deposits on the internal surfaces, they reduce the flow sections of the intake valves and lead to a drop in engine power.