Detail: repair running uaz do-it-yourself loaf from a real master for a site site.
Any motorist can repair front axle Do-it-yourself UAZ Loaf and UAZ 469. This work is easy. Structurally, both of these models are similar. This is especially true for the suspension. frame construction implies ease of dismantling the front axle and high vehicle reliability. There are some differences in the spring and spring suspension. But these features do not greatly affect the complexity of the work.Almost no special tools are needed for repairs. All work is carried out with a minimum set of tools available to each driver.
Do-it-yourself front axle repair UAZ Loaf and UAZ 469 uncomplicated. Most often, during operation, it is necessary to carry out various preventive work. As a rule, they do not require removal and disassembly of the bridge. The care list includes:
- The pivots are checked for gaps;
- Threaded connections must be periodically tightened;
- Convergence is checked;
- The requirements of the parts lubrication tables are followed.
Be sure to visually inspect the main nodes. Particular attention is paid to the serviceability of the fixing bolts. Also, all locking elements must be securely fastened. Check Angle maximum turn wheels. It should not exceed 28 degrees. If the values differ from those indicated, adjustments must be made. Also, always check that the king pins are properly tightened and functioning properly. Untimely elimination of minor faults may lead to the need for a major overhaul of the front axle.
Repair of this node begins with the dismantling of the bridge. On a loaf and a goat, these works are performed identically. There are only small differences. When performing repairs, you need to be extremely careful. Removing the bridge is a series of simple steps:
- You should start by ensuring the immobility of the car. For this, anti-recoil brake pads are installed;
- Further on the "goat" turn off brake pipes from hoses. On the Loaf, the tubes have transition pipes. In this case, the hoses are disconnected from the nozzles;
- Remove the nuts securing the lower shock absorber cups. This item is the same on both machines.
- Next, unscrew the bolts connecting the drive gear flange and the front cardan. Before this, you need to fill in the WD-40 threaded connection;
- Remove traction from the bipod. The nut located on the ball pin is twisted;
- Twist the nuts that secure the spring ladders. Disassemble them with overlays;
- They will jack up the frame in front of the car, roll out the bridge.
Some UAZ 469 cars are equipped with springs. In this case, the penultimate paragraph will look a little different. The penultimate action removes the stabilizer roll stability, by disconnecting from the suspension arms located along the longitudinal. The levers and cross rod are unscrewed from the bracket.
Repair. After disassembly, all parts are washed in gasoline and lubricated. Faulty ones are replaced with new ones. The assembly takes place exactly the opposite, while it is necessary to clarify some of the nuances of the process.
When replacing the pivot bushings specifically in the ball joint, it is necessary to tighten them up to 25 mm at the end of the pressing. Lubricant needs to be put in. Do-it-yourself repair of the front axle of the UAZ Loaf and UAZ 469 is not so difficult, but accuracy is needed. For example, when installing a ball seal, the ring for it must be impregnated with hot oil. After assembly, the operability of the bridge is checked using a stand.
UAZ 452 "loaf" - a fairly reliable Soviet all-wheel drive SUV. The main breakdowns of this car are associated with leakage of lubricating fluids from the engine, gearbox (gearbox), front and rear axles, constant velocity joints (CV joints) and hubs. The main reason for the formation of such leaks is that the material from which the original oil seals and gaskets of the above units are made is partially corroded under the influence of modern lubricating fluids. Due to poor lubrication, moving metal parts wear out and have to be replaced periodically. It is necessary to carry out preventive maintenance of the UAZ 452 at least once a year, change leaking seals and gaskets, and adjust the clutch.
The problem is that finding a factory repair manual for these SUVs is quite difficult. Therefore, we bring to your attention an instruction that will allow you to repair a car yourself.
As you know, the repair of a car engine begins with its dismantling. And only then disassembly, replacement of damaged parts and assembly is carried out. Overhaul of the power unit is not an easy task, therefore it is not worth doing it yourself, without the help of experienced craftsmen. But you can change the seals yourself.
The factory repair manual for the UAZ 452 car indicates: to remove power unit, gotta lift it up out engine compartment. With this method of dismantling, you will need 2 strong pipes (longer than the width of the cab) and the help of 2 people.
Everything, the power unit is removed.
Check if you need overhaul engine, easy: you need to put your hand on the open oil filler neck of a running engine. If the palm pushes out, then disassembly is required.
Quite often, in UAZ 452 cars, the free play of the clutch pedal is not adjusted. This leads to increased wear of the driven disk and the need for early replacement. Adjusting the clutch of a UAZ 452 car is quite simple.
Clutch design.
- Clutch release pedal.
- Brake pedal.
- Springs.
- Butter dish.
- Thrust bearing.
- Coupling.
- Clutch spring.
- Lever arm.
- Adjusting bolt.
- Fork.
- Pusher.
- Fork spring.
- Traction.
- Press grease fitting.
Clutch pedal adjustment
The factory manual for the repair of wagon-mounted UAZ vehicles sets the following unit parameters:
- the gap between the pressure bearing and the heads of the screws of the levers is 2.5 mm;
- pedal free play - 28-35 mm;
- full pedal travel - 145-155 mm.
Clutch adjustment is carried out as follows.
- We measure the free and full travel of the clutch pedal with a ruler.
- Remove the pedal springs and clutch forks.
- Loosen pusher nut.
- We unscrew or twist the thrust tip of the pusher until the recommended parameters are reached.
- Tighten the pusher nut.
- We put the springs back.
After that, we check the consolidated and full pedal travel. If they correspond to the recommended parameters, we start the engine and check the operation of the clutch while driving. If it does not drive or slip, the clutch adjustment is complete. If something bothers, repeat the procedure until the desired result is obtained.
The domestic UAZ spring is practically universal for the Patriot, Hunter and Pickup models, as well as their modifications. The elements differ only in the number of sheets that affect the load capacity vehicle, as well as the difference in geometric dimensions. In this regard, it is quite possible to install four-leaf elements from Pickup and Cargo on Patriot and Hunter. The increase in carrying capacity in this case will be about two hundred kilograms. Consider the features of regular and modified parts.
Models with spring-type front suspension
A UAZ spring of this type is produced by a metallurgical plant in Chusovoy. hallmark element of ChMP production is the presence of a sticker and a stamp on the tightening collar. The name of the manufacturer, the date of manufacture of the part, as well as the stamp of the quality control department are displayed here.
In addition, each spring is marked with a label, since it is not always convenient to see the stigma. Among the additional information: barcode, spring number, GOST standard.
Model 31512-2912012
This UAZ spring is a rear sheet metal part, which was mounted as standard on models 31512, 31514-10, 3160. The element is also suitable for Patriots and Hunters, as well as their modifications.
Distinctive characteristics of the node in question:
Regular spring UAZ type 3163-2912010-02
This regular low-sheet element has the following characteristics:
The UAZ Patriot springs under consideration are also suitable for models 315148, 315143, 315196, Hunter, Simbir and Cargo. This part differs from analogue 315112-2912012 in length and tightening clamp, as well as in the presence of gaskets between sheets.
Four-leaf version 3153-2912010
The rear leaf spring of this type is mounted on under the index: 3153, 3159, 3162. The part can be used on models 315148, 315143, Hunter, Patriot, 3163, 2362, Cargo. The modification in question is very popular among car owners from Ulyanovsk manufacturers.
Below are its main parameters:
Modification 3162-2912010
This UAZ spring is a standard part that is mounted on rear axle almost all cars of this brand, including "Patriot", "Bars", "Hunter" and "Cargo". On sale, this spring is quite rare, and therefore is not particularly popular among owners.
Part Specifications:
Version 2360-2912010
These UAZ Patriot rear leaf springs have the following characteristics:
- The weight of the assembled element is 22.3 kg.
- Control load, Pk, daN - 643.75.
- Length full / estimated - 1.41 / 1.35 m.
- Package height - 49.6 mm.
- Steel type - 50HGFA.
- The number of sheets is four.
In the standard layout, the part in question is mounted on the Cargo, Patriot, Pickup, Hunter, Simbir and some others models. According to the reviews of the owners, this product is not particularly popular. Users give preference to modifications of four sheets under the index 3153-2912010.
Gain
Often the repair of UAZ and its tuning concerns shock-absorbing devices. The old direct springs on the Hunter can be changed to a reinforced sixteen-leaf counterpart. As practice shows, the standard elements of this unit are not of high quality steel, they quickly deform and crack. Therefore, the modernization of the block is justified.
After installing reinforced springs, the car will become much higher, the power reserve will increase. The car will become slightly stiffer, which is not a significant disadvantage since we are considering an SUV. But driving performance and the cross-country ability of the vehicle will noticeably please the owners domestic jeeps. The following is step-by-step instruction for installing new items.
UAZ spring mount
Installing a reinforced spring is not too difficult. Work is performed in the following order:
- First, the back of the car is lifted until the wheels begin to overhang. Be sure to install a safety beam or support.
- Then the wheel is removed.
- An additional support under the bridge is being installed. A regular jack is quite suitable for this.
- Stepladders and block cups are unscrewed.
- The shock-absorbing element is dismantled from the lower mount.
- The bridge goes down.
- The old spring is dismantled.
- Trying on a new element.
- The bridge is lowered to a point that is optimal for installing a new part.
- The element is placed in bowls located on the frame, the hanging part is supported wooden block, which will not allow the spring to pop out until the final installation.
- The prepared new assembly is mounted, fixed with stepladders, but not yet tightened to the stop.
- The bowls are exposed at the previous place of installation.
- The bridge rises until the springs settle on the pillows.
- The wheel is beaded.
- The lower cups are twisted.
At this point, the repair of the UAZ in terms of replacing the springs can be considered ready. In order for the part to be installed to sit better in its place, it is advisable to load the rear of the car during work. After carrying out the work, check the car in action at low speed. If there is no discomfort and creaking, the upgrade was successful.
In conclusion
The parts under consideration are responsible for the behavior of the car on different types soils. Unfortunately, domestic regular UAZ-469 springs are not of high quality steel. Therefore, many owners resort to replacing this node with a reinforced version, since the standard element often bursts and deforms on bumps and potholes. It is worth noting that most of the standard springs for Ulyanovsk SUVs are interchangeable, which makes it easier to repair and maintain the car.
Examining the front suspension, as a rule, the transmission is checked and steering. Most often, breakdowns can be found in shock absorbers, springs, ball bearings, lower levers with silent blocks, upper bearings, stabilizer links, steering rack, steering rods and tips, steering shaft, hub bearings, CV joints.
Anticipating the diagnosis of the suspension, an inspection is made of the rubber boots and anthers of all possible parts, and if a part is found to have a damaged boot, as a rule, it is changed. The shock absorber must not have oil leaks, and shells and scratches should not be found on the surface of its smooth mirror rod. The operation of the shock absorber should be silent when the car is rocking, and the vibrations should disappear almost immediately. If the shock absorber is not working properly, then the wheel, when driving on the road, will not have a rolling trajectory, but it will jump like a ball. With oil leaks, the shock absorber can function normally for a certain time.
The low landing of the car and the inability to properly adjust the camber indicate worn (sagging) springs. You can check the ball joints by rocking the lower arms up and down using a pry bar. Significant backlash should not be present. Just as the silent blocks of the lower levers should not have it when they are pressed with a crowbar. In addition, bulging and cracked pieces of rubber, as well as exfoliated from the bushings, are acceptable.
Ball bearings and silent blocks are inspected on a raised machine, the support mount with the lower arm is unscrewed. Further, when the support body is turned by hand, it must have a smooth movement, the presence of force and the absence of backlash. At lower arm when he has a free position, there should be a desire to occupy a horizontal position, under the influence of rubber silent blocks. When the machine is rocked up and down, faulty top mount bearings may have play. And if you remove the support, you can also reveal the torn rubber part.
Inspection and swinging by hand are done when checking the rods and stabilizer supports. Steering rack failures are rare, and occur mainly in cases of wear on the guide bush (opposite the driver). This is determined by the swing of the rail when the wheels are turned towards the steering wheel, and it is necessary to take the rail through the traction cover. Checking the rods and tips is carried out either by turning the wheel by hand, or by turning the steering wheel while simultaneously grasping the part being checked by hand. There shouldn't be loopholes.
A faulty steering shaft may also have play, a cover is recommended for this part. If the hub bearing is defective, a hum is detected while driving. At the CV joint, characteristic loud cods will be heard when the car overcomes sharp turn with little acceleration. In general, the disadvantages of the front suspension described above are the most typical, although there may be others.
The suspension of the car consists of four longitudinal semi-elliptical springs, working together with double-acting hydraulic telescopic shock absorbers ( , ).
The front springs of cars of the UAZ-31512 family consist of 8 sheets, the rear springs of 7 or 9 sheets, depending on the configuration.
The front and rear springs of cars of the UAZ-3741 family are the same and interchangeable, they consist of 13 sheets. The mounting of the front and rear springs is the same.
For individual cars of the UAZ-31512 family (including all UAZ-3153 cars), a front spring suspension () and rear suspension with leaf springs ().
The small-leaf spring consists of 3 sheets (for the UAZ-3153 car - from 4 sheets).
Front and rear shock absorbers() of all cars, except cars with spring suspension, are the same and interchangeable.
For vehicles with front spring suspension and rear suspension with leaf springs, the front shock absorbers are shorter (by 25 mm).
Shock absorbers with a cylinder diameter of 35 and 40 mm can be installed in complete sets on cars. It is allowed to install shock absorbers of different dimensions along the axles.
Maintenance
Periodically check the condition of the springs, suspension springs and shock absorbers, their fastening and eliminate the identified malfunctions.
Leaf springs should not have cracks. Shearing the center bolt of the spring can cause longitudinal displacement of the sheets, and loosening of the stepladders can cause transverse displacement of the sheets.
To prevent corrosion and eliminate creaking, lubricate the leaf springs according to the instructions in the lubrication table.
Knocks and squeaks in the ears of the springs and spring suspension joints indicate wear or incomplete tightening rubber bushings or wear of rubber-metal hinges. In this case, replace the hinges and bushings or tighten the bushings more tightly. To increase the tension in the bushings of the springs, install rubber gaskets (rings) cut from a chamber or similar rubber between them.
A sign of shock absorber failure is prolonged swaying of the vehicle after driving over a bump in the road.
When servicing shock absorbers, periodically inspect and tighten their fastening in a timely manner, as well as check the condition of the rubber bushings in the ears.
The shock absorber does not require special adjustments during operation.
Dismantle shock absorbers only in the following cases:
- the occurrence of an unrecoverable fluid leak;
– loss of shock absorber forces during tension or compression;
- Fluid replacement.
The shock absorber should not be disassembled unless absolutely necessary.
Before disassembling the shock absorber, clean it of dirt, thoroughly rinse and wipe it. Perform disassembly and reassembly under conditions that ensure complete cleanliness.
After the first 3000 km of run or when fluid leaks through the stuffing box 15 (see) of the rod and sealing rings 14.16, tighten the nut 18. The tightening torque is 78–98 N m (8–10 kgf m). If the leakage does not stop, remove the shock absorber, disassemble, inspect the o-rings and the hole of the guide sleeve 13 of the rod. Replace stem seal, stem guide, reservoir O-rings, and other parts that are worn on the inner diameter. Install the rubber seal 15 with the inscription “bottom” on it to the piston.
When installing the oil seal, lubricate its internal surfaces mating with the rod with shock absorber fluid to reduce wear and prevent squeaking.
Reduced shock absorber performance or failure may be caused by clogged valve systems, settling of valve springs, or broken parts. In such cases, disassemble the shock absorber, wash and replace sagging or broken springs and parts.
Repair
Removal, disassembly and assembly of springs for cars of the UAZ-31512 family
Remove the front spring in the following order:
2. Place the front of the car on a stand.
3. Turn away bolts of fastening of an arm 7 and a nut of an axis 16 ear of a spring.
4. Remove the spring 13 and disassemble the earring with rubber bushings 8.
Install the spring in reverse order.
Remove and install the rear spring in the same way as the front. When installing the front and rear springs on the car, the bent lugs on the first two sheets must face forward.
Make the final tightening of the spring ladder nuts with loaded springs.
2. Unbend the spring collars.
Assemble the spring in the reverse order, taking into account the following:
1. Before assembly, lubricate the leaf springs according to the lubrication table.
2. Securely rivet the clamps to the sheets, the ends of the clamp rivets should not protrude above the surface of the sheets.
3. Clamps after assembling the spring should not interfere with the free movement of sheets during operation.
4. After assembly, paint the spring.
Features of dismantling the front spring suspension
1. Disconnect the lower lugs of the shock absorbers 22 from the longitudinal rods 1 by unscrewing the nuts and removing the bolts.
2. Raise and place the front of the vehicle on a stand.
3. Remove springs 12 and vibration-absorbing pads 15.
4. Turn away bolts of fastening of buffers 21.
5. Reassemble in reverse order.
Replacement of rubber-metal hinges 3, support bushings 6 of longitudinal rods and rubber bushings 18, 19 of the stabilizer:
1. Securely fix the car from spontaneous movement.
2. Disconnect the bottom eyes of shock-absorbers from longitudinal bars, having turned away nuts and having taken out bolts.
3. Turn away nuts 7 and beat out bolts of fastening of a longitudinal bar to the bridge.
4. Unpin and unscrew nuts 8.
5. Turn away nuts of step-ladders 20 fastenings of the stabilizer to a bar.
6. Remove the longitudinal bars by sliding the rear end of the bar out of the bracket hole on the frame.
7. Turn away bolts of fastening of the stabilizer to an arm 17.
8. Replace the rubber-metal hinges 3. The hinges are replaced using special mandrels on the pressing equipment. All joints must be replaced at the same time.
9. Remove bushings 19 from the stabilizer and put on new ones.
10. Replace the bushings 18 and tighten the bolts securing the stabilizer to the bracket 17.
11. Put a washer and a support rubber hinge 6 on the rear end of the rod 1, insert the rod into the hole of the bracket 5, put on the second rubber hinge and washer, screw on the nut 8.
12. Insert the front end of the rod into the bracket 4, install new bolts and tighten the nuts 7.
13. Install the second rod in the same way.
14. Tighten nuts 7 to a torque of 14–16 kgf m. Tighten nuts 8 to the stop and cotter them.
15. Install stepladders 20 securing the stabilizer to the bar and tighten the nuts of the ladders.
16. Connect the lower lugs of the shock absorbers to the longitudinal bars by inserting the bolts and tightening the nuts.
Replacing the transverse link 2 or rubber-metal joints 9:
1. Remove the bolt and nut securing the tie rod to the axle and frame.
2. Remove the tie rod.
3. Replace the hinges in the same way as the trailing rod hinges.
4. Install the linkage and secure it using new bolts.
5. Tighten the nut and bolt to a torque of 14–16 kgf m.
Removal, disassembly and assembly of springs for cars of the UAZ-3741 family
Remove the springs in the following order:
1. Unscrew the nuts of the ladders 16 (see) of the springs, remove the ladders, lining 14 and pad 4 of the spring.
2. Disconnect the lower eyelet of the shock absorber.
3. Place the front of the car on a stand.
4. Turn away bolts of fastening of covers of arms 1 and 9 and remove covers.
5. Remove springs with rubber pads. Install the springs in reverse order. At the same time, straighten the spring using the special tool (). In the absence of a special device, we recommend installing the spring in the following order:
1. Secure the springs with stepladders to the bridge.
2. Install the spring pads on its ends.
3. Gradually lowering the car onto the bridge with springs and guiding the springs with the lever, achieve alternate installation of the ends of the spring with pillows in its brackets.
4. Replace the bracket covers and tighten the bracket bolts.
Remove and install the rear spring in the same way as the front.
Disassemble the spring in the following order:
1. Secure the spring in a vise to the head of the center bolt.
2. Unbend the spring collars.
3. Turn away a nut of a central bolt and disassemble a spring. After dismantling, carefully clean the sheets of dirt, rinse in kerosene, replace broken sheets.
Rice. 4.7) unscrew the reservoir nut.
2. Slightly rocking the upper end, remove the rod together with the piston from the working cylinder. When doing this, be especially careful not to damage the polished surface of the rod.
3. Remove the working cylinder from the tank and completely drain the shock absorber fluid.
4. Secure the stem in a vise to the top mounting eye, unscrew the piston nut. Remove the piston with valve parts, guide and stuffing box.
Wash all parts of the shock absorber in gasoline or kerosene. Carefully inspect the washed and dried parts and identify those that need to be repaired or replaced.
When inspecting the details of the valve assemblies, pay special attention to the condition of the valve edges. If there are scratches, signs of significant wear and other defects on the shut-off surface of the valve or its seat, remove them by lapping. Replace valve parts that show cracks and breaks during inspection.
Assemble the shock absorber in the reverse order, taking into account the following:
1. Soak a new polyurethane foam seal with shock absorber fluid before installation.
2. Install the rubber stem seal into the cage so that the inscription “bottom” on it is facing the piston. Before installing the stuffing box on the rod, moisten its internal surfaces mating with the rod with shock absorber fluid.
3. Install the working cylinder with the compression valve assembly pressed into it into the tank, then fill in the shock absorber fluid (320 cm 3 - for shock absorbers with a cylinder diameter of 35 mm; 345 cm 3 - with a diameter of 40 mm; 295 cm 3 - for the front shock absorbers of cars with spring suspension), while filling the cylinder to the top, and pour the rest of the liquid into the reservoir.
To fill shock absorbers, use shock absorber fluid in accordance with the lubrication table. The amount of liquid to be filled must also strictly correspond to the filling volume of the shock absorber. The allowable difference can be no more than ± 5 cm 3. Failure to follow these recommendations will lead to disruption of the shock absorber and even its failure.
4. Insert the rod with the piston into the working cylinder, close the cylinder with the guide and then, carefully straightening the reservoir gland along the end of the guide, tighten the reservoir nut.
Pump the newly assembled shock absorber before putting it on the car by moving the rod until the force becomes constant over the entire stroke. This is necessary to remove air from the cavities of the working cylinder.
Widely used not only in the territory Russian Federation but also abroad. The device of the front axle UAZ loaf allows you to connect four-wheel drive to overcome off-road. Thanks to this, the machine is distinguished by high cross-country ability in difficult areas of rough terrain.
How the UAZ front axle works
The scheme of the front axle UAZ loaf allows you to determine that it consists of several nodes:
- Composite crankcase;
- Reducer;
- Half shafts.
Below is the arrangement of the components of the front axle of a UAZ loaf car.
Carter
The crankcase of the bridge of the UAZ car loaf consists of 2 parts. Between themselves, the parts are bolted, while forming the gearbox housing. Parts of the crankcase are equipped with mounts for installing springs and shock absorbers.
IMPORTANT: When using the vehicle, the grease in the crankcase heats up and expands. In this case, the pressure in the crankcase cavity increases. To prevent leakage of the crankcase of the bridge, a breather valve is provided. It is installed on the housing of the semi-axis of the UAZ front axle and is necessary for communicating the crankcase cavity with the atmosphere.
Rotary mechanisms are located along the edges of the bridge. They are essential for driving. The mechanisms are pivotally connected to the edges of the crankcase. Pins are installed on the rotary mechanisms. They are necessary for articulated connection with the hubs of the car. To reduce the degree of friction, the hub is mounted on roller bearings.
Reducer
The front axle reducer UAZ loaf consists of the main gear and the cross-axle differential. When the front axle of the UAZ loaf is turned on, the torque from the gearbox is supplied through the cardan shaft to the gearbox flange. It is mounted on the same shaft as the final drive gear.
As the drive gear rotates, it transmits torque to the driven gear. Compared to the drive gear, it has a large diameter. This allows you to reduce the torque transmitted from transfer box.
REFERENCE: The gear teeth of the main gear of the UAZ car reducer are located at an angle. This prevents the gear teeth from beating against each other, thereby reducing the noise level when the vehicle is moving.
An interwheel differential is located inside the driven gear. It consists of conical satellites and their axes. The differential mechanism includes the splines of the semi-axes. The differential allows you to achieve a difference in the speed of rotation of the wheels of one axle when turning the car. You can also read about.
half shafts
The front axle of the UAZ loaf car is a shaft with slots on the edges. On the one hand, splines are installed in the differential of the gearbox. The other side of the axle shaft drives the wheel hub. The transmission of torque from the front axle gearbox to the wheel mechanism is carried out using a CV joint. It allows you to transmit torque regardless of the angle of rotation of the wheel mechanisms.
A distinctive feature of the front axle of the UAZ loaf car is the ability to disconnect the wheel hubs from the axle shafts. This is necessary to prevent wear of the rotating parts of the gearbox during long-term movement on the surface. good quality.
Possible bridge malfunctions and their causes
The front axle of the UAZ loaf car is distinguished by reliability and unpretentiousness to operating conditions. Most frequent malfunctions this:
- Violation of the sealing of the crankcase. The excess pressure that occurs when the oil is heated when the car is moving leads to a violation of the sealing of the crankcase. To prevent malfunction, it is necessary to regularly check the performance of the breathing valve;
- Bearings worn out. Occurs as a result of improper operation of the front axle of the UAZ loaf car. Switching the UAZ loaf front axle to the on position when driving on a good quality surface leads to rapid wear of the gearbox bearings. To prevent damage to the bearings, it is necessary to connect the front axle only to overcome off-road;
- Increased wear on rotating parts. Occurs due to poor quality lubricant. It is necessary to change the oil in the front axle regularly. The cause of the malfunction may be water entering the gearbox housing when overcoming the ford. To prevent water from entering the gearbox crankcase, the breathing valve is equipped with a hose attached under the engine compartment cover.
- Violation of the cross-axle differential. Often occurs due to wear of the pivots. To prevent breakage, it is necessary to regularly inspect the mechanism of the pivots for the presence of play. If the permissible values are exceeded, the pivots should be replaced;
- Breakage of the main gear shaft bearing. Occurs due to a malfunction of the propeller shaft cross. The integrity of the cross should be checked regularly.
- High degree of wear of conical satellites or their axes. The integrity of the conical satellites and their axles is affected by the pressure difference in the tires of the front axle wheels. Tire pressure must be constantly monitored to avoid breakdowns.
Wiring diagram of the front axle UAZ loaf
Some car owners are wondering how the front axle on the UAZ loaf is turned on? The front axle is engaged in two ways:
- Lever mounted in the cab. The lever controls the transfer case. When you turn on the front axle UAZ loaf using a lever installed in the cabin, the torque from the transfer case is transmitted through cardan shaft to the leading axle.
- With the help of couplings installed in the wheel mechanisms. It is possible to detach the drive axle hub from the axle shaft. Turning the UAZ loaf front axle on and off with the help of clutches allows you to reduce the load on the gearbox when driving on a hard surface.
IMPORTANT: after disconnecting the couplings located in the wheel mechanisms, connecting the all-wheel drive with a lever from the passenger compartment will be impossible.
To engage the clutch it is necessary to remove the protective cover of the drive axle hub. Using a hexagon, tighten the coupling cap until it stops. The axle shaft splines will engage and the hub will be connected to the gearbox. To disengage the clutch, reverse the procedure.
To connect the all-wheel drive with a lever installed in the passenger compartment, it is necessary as follows:
- Disengage the clutch;
- Set the gearshift lever to neutral position;
- Move the control lever to the extreme forward position;
- After completing the steps, the four-wheel drive will be turned on. It is necessary to turn off the four-wheel drive by moving the lever to the rearmost position.
ATTENTION: Before you disable or enable the front axle on the UAZ loaf, you must turn off the clutch. To do this, depress the clutch pedal located in the passenger compartment.
Removal and repair of the front axle
The front axle UAZ loaf has a simple device, which allows you to do the repair yourself with minimal technical knowledge. To remove the assembly from the car, you must:
- Car to a viewing hole, overpass or lift;
- Immobilize the machine to prevent spontaneous rolling. For this under rear wheels install recoil devices (shoes);
- Jack up the car frame. To simultaneously raise both sides, the jack is installed in the front of the frame in the center;
- To avoid injury, install the car frame on specialized supports;
- Unscrew the nuts securing the axle to the semi-elliptical springs;
- Dismantle the steering arm;
- Unscrew the shock absorber mounting nuts;
- Dismantle shock absorbers;
- Remove the vehicle's drive axle.
REFERENCE: If it is necessary to replace the elastic cushions installed in the spring mounting brackets, the axle is dismantled together with the springs. To do this, instead of the nuts of the ladders, the bolts fixing the covers of the brackets are unscrewed.
A person who has certain skills in repairing equipment can repair and adjust the front axle of a UAZ loaf car. To diagnose a malfunction, it is necessary to conduct a visual inspection of the assembly. FROM outer side the UAZ crankcase is inspected for oil leaks. The presence of oil streaks indicates crankcase depressurization. To eliminate oil leakage, it is necessary to replace gaskets and seals. During installation, the gaskets are lubricated with sealant.
After disassembling the assembly, it is necessary to pay attention to the integrity of the bearings. Damaged parts must be replaced with new ones. Particular attention is paid to the wear of rotating parts. If the permissible norm is exceeded, worn parts should be replaced.
ATTENTION: The drive and driven gears of the final drive of the reducer are replaced at the same time. Replacing one of the final drive gears can lead to its rapid wear due to damaged teeth of the second gear.
From the above, it follows that the UAZ front axle, due to its design, improves specifications car. The front axle is equipped with swivel mechanisms. This allows you to transfer torque from the gearbox to the wheels of the vehicle, regardless of their angle of rotation. It is possible to disconnect the gearbox and wheel mechanisms by disengaging the clutches.