Any motorist can make repairs front axle UAZ Loaf and UAZ 469 do it yourself. This work is not difficult. Structurally, both of these models are similar. This is especially true for the suspension. The frame structure means easy dismantling of the front axle and high vehicle reliability. There are some differences in leaf 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.
Regular work
Do-it-yourself repair of the front axle of UAZ Loaf and UAZ 469 is simple. 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 list of care actions includes:
- The pivots are checked for gaps;
- Threaded connections must be tightened periodically;
- Convergence is checked;
- The requirements of the parts lubrication tables are met.
Withdrawal
Repair of this unit begins with the dismantling of the bridge. On a loaf and a "goat", these works are performed identically. There are only minor differences. When performing repair actions, you need to be extremely careful. Removing the bridge consists of a series of simple steps:
- You should start by ensuring that the vehicle is stationary. For this, anti-rollback brake pads are installed;
- Further, on the "goat" they turn off brake pipes from the 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 element is the same on both machines.
- Next, unscrew the bolts connecting the drive gear flange and the front universal joint. Before that you need to fill threaded connection ;
- Remove the thrust from the bipod. The nut on the ball pin is twisted;
- Unscrew 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.
Parsing
When carrying out repairs, it is necessary to put the unit on the stand. This will make the disassembly task easier. After that, the wheels are removed. Then proceed to disassembly:
- Dismantle the bipod. The nut that secures the thrust pin and the steering knuckle lever is twisted;
- Next, unscrew the bolts securing the brake drums. At the same time, they remove the clutches used for wheel shutdown;
- Go to disassembling the hub. Begin this work by straightening the edges of the locking washer. Next, a nut with a locknut is twisted, this allows you to remove the washer immediately with the inner ring and roller bearings of the hub. After the rest of the hub is removed (see article "");
- Remove the brake shield, this is done by unscrewing the bolts. It is necessary to remove the trunnions with the knuckle hinges;
- The steering linkage is disassembled, for this you need to unscrew the fastening nuts of the trapezoid;
- To remove the ball joint, the bolts of its attachment to the axle shaft are unscrewed. Dismantle the support-restraints. The supports are pressed out;
- Remove the shims used for adjustment from the knuckle and the lever. Next, unscrew the nuts securing the upper pad of the king pin. Also do from the bottom. Remove the ball joint seal. After the pivots are pressed out. Disassembly is complete.
Repair... After disassembly, all parts are washed in gasoline and lubricated. Defective 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 bearing, after pressing, they must be tightened to 25 mm. Put some grease inside. Do-it-yourself repair of the front axle of 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 functionality of the bridge is checked using a stand.
Detail: renovation running UAZ do-it-yourself loaf from a real master for a site site.
Any motorist can repair the front axle of the UAZ Bukhanka and UAZ 469 with his own hands. This work is not difficult. Structurally, both of these models are similar. This is especially true for the suspension. The frame structure means easy dismantling of the front axle and high vehicle reliability. There are some differences in leaf 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 repair of the front axle of 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 list of care actions includes:
- The pivots are checked for gaps;
- Threaded connections must be tightened periodically;
- Convergence is checked;
- The requirements of the parts lubrication tables are met.
It is imperative to visually inspect the main components. Particular attention is paid to the serviceability of the fastening bolts. All locking elements must also be securely reinforced. Check the angle of maximum rotation of the wheels. It should not exceed 28 degrees. If the indicators differ from those indicated, you need to make an adjustment. Also, always check that the king pins are properly tightened and functioning. Untimely elimination of minor faults can lead to the need for overhaul of the front axle.
Repair of this unit begins with the dismantling of the bridge. On a loaf and a "goat", these works are performed identically. There are only minor differences. When performing repair actions, you need to be extremely careful. Removing the bridge consists of a series of simple steps:
- You should start by ensuring that the vehicle is stationary. For this, anti-rollback brake pads are installed;
- Further on the "goat" the brake pipes are disconnected from the 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 element is the same on both machines.
- Next, unscrew the bolts connecting the drive gear flange and the front universal joint. Before that, you need to fill in the WD-40 threaded connection;
- Remove the thrust from the bipod. The nut on the ball pin is twisted;
- Unscrew 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 vehicles are equipped with springs. In this case, the penultimate item will look a little different. The penultimate action removes the anti-roll bar by disconnecting it from the longitudinal suspension arms. Levers and traverse rods are unscrewed from the bracket.
Repair... After disassembly, all parts are washed in gasoline and lubricated. Defective 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 bearing, after pressing, they must be tightened to 25 mm. Put some grease inside. Do-it-yourself repair of the front axle of 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 functionality of the bridge is checked using a stand.
UAZ 452 "loaf" is a fairly reliable Soviet four-wheel drive SUV. The main breakdowns of this car are associated with leaks of lubricating fluids from the engine, gearbox (gearbox), front and rear axles, hinges of equal angular velocities (SHRUS) and hubs. The main reason for the formation of such leaks is that the material from which the original 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 are subject to heavy wear and must be replaced periodically. It is necessary to carry out preventive maintenance of the UAZ 452 at least once a year, change leaking oil seals and gaskets, and adjust the clutch.
The problem is that finding a factory 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 a power unit is not an easy task, so it is not worth doing it yourself, without the help of experienced craftsmen. But you can change the oil seals yourself.
The factory repair manual for the UAZ 452 vehicle states: to remove power unit, you need to lift it up from the engine compartment. With this method of dismantling, you need 2 strong pipes (longer than the width of the cab) and the help of 2 people.
That's it, the power unit is removed.
Check if you need overhaul engine, easy: you need to put your hand to the open oil filler neck of the running engine. If the palm pushes out, then disassembly is required.
Quite often, in UAZ 452 cars, the free travel of the clutch pedal is not adjusted. This leads to increased wear of the driven disk and the need to replace it early. Adjusting the clutch of a UAZ 452 car is quite simple.
Clutch drive design.
- Clutch pedal.
- Brake pedal.
- Springs.
- Oiler.
- Thrust bearing.
- Clutch.
- Clutch spring.
- Lever arm.
- Adjusting bolt.
- Fork.
- Pusher.
- Fork spring.
- Traction.
- Grease nipple.
Clutch Pedal Adjustment
The factory manual for the repair of UAZ wagon-type vehicles sets the following unit parameters:
- the gap between the pressure bearing and the screw heads of the levers - 2.5 mm;
- pedal free travel - 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 fork.
- We loosen the pusher nut.
- Unscrew or twist the thrust end of the pusher until the recommended parameters are reached.
- We tighten the pusher nut.
- We put the springs back on.
After that, we check the combined 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 skid, the clutch adjustment is complete. If something bothers you, we repeat the procedure until the desired result is obtained.
Examining the front suspension typically checks the transmission and steering... Most often, breakdowns can be found in shock absorbers, springs, ball bearings, lower levers with silent blocks, upper bearings, stabilizer rods, steering rack, steering rods and tips, steering shaft, hub bearings, CV joints.
Prior to the diagnosis of the suspension, an inspection is done rubber covers and anthers of all possible parts, and if a damaged cover is found on a part, as a rule, it changes. Oil leaks are not permissible at the shock absorber; no cavities or scratches should be found on the surface of its smooth mirror rod. The shock absorber should be silent when the car is swinging, and vibrations should disappear almost immediately. If the shock absorber is not in good working order, then a wheel will not be able to see a rolling trajectory while driving on the road, but it will jump like a ball. In the event of oil leaks, the shock absorber can function normally for a certain period of time.
A low seating position of the vehicle and the inability to perform the correct camber adjustment indicate worn (sagging) springs. You can check the ball joints by swinging the lower arms up and down using a pry bar. There should be no significant backlash. 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 peeling from the bushings, are permissible.
Ball joints and silent blocks are inspected on a raised machine, the support mount with the lower arm is unscrewed. Further, when the body of the support is turned by hands, it should have a smooth movement, the presence of force and the absence of backlash. At the lower lever, when it has a free position, there should be a tendency to occupy a horizontal position, under the influence of rubber silent blocks. When the machine wiggles up and down, faulty top bearing 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. Breakage of the steering rack is rare and occurs mainly in cases of wear on the guide bush (opposite to the driver). This is determined by the swinging of the rail when the wheels are turned towards the steering wheel, and it is necessary to grasp the rail through the traction cover. Checking the rods and tips is carried out either by turning the wheel with your hands, or by turning the steering wheel while simultaneously gripping the part to be checked with your hand. There should be no backlashes.
A faulty steering shaft may also have a backlash; a cover is recommended for this part. With a defective hub bearing, a hum is detected while driving. At the CV joint, you will hear characteristic loud crackling sounds when the cars overcome sharp turn having a little overclocking. In general, the disadvantages of the front suspension described above are the most typical, although there may be others.
The UAZ-3741 car ("Loaf" or "Tablet") is not picky about the road surface - it will go where it is necessary, and not where it is possible. This is largely the merit of the front drive axle, which always comes to the rescue - read about this unit, its types, device and operating rules in this article.
The device of the chassis and transmission of the UAZ-3741
Already the first car Ulyanovsk Automobile Plant- the famous GAZ-69 - had a 4 × 4 wheel arrangement, had a fantastic cross-country ability and was extremely unpretentious. And to this day, the concept of "people's SUV", embedded in the legendary "Kozlik", remains relevant and is implemented in all modern UAZ models. Four-wheel drive is also provided in the UAZ-3741 car (until 1985 - UAZ-452), which is better known under the name "Loaf" (which reflects its characteristic shape) or "Tablet" (due to the frequent use as ambulances and ambulances machines in the army).
The chassis of the UAZ-3741 is based on two drive axles with a classic dependent suspension on semi-elliptical springs and hydraulic shock absorbers. Moreover, only in this model, the springs have 13 sheets (in other models there are less sheets), and on the front and rear suspension the springs are interchangeable.
The car's transmission has a fairly simple device, it is also built according to the traditional scheme without any special features. The transmission contains a 4-speed manual transmission (classic manual transmission), which works in tandem with a two-stage transfer case (has an overdrive and downshift) - due to the presence of a "transfer case" quantity possible transfers doubles, which greatly increases the capabilities of the transmission. Torque from transfer case with the help of two cardan shafts transmitted to the front and rear drive axles. In driving axles, the moment is divided into two flows and directed to the wheels, ensuring their rotation.
Separately, let's say about the purpose and arrangement of the front drive axle of cars of the UAZ-3741 family.
Or, in the folk way, "loaf", is very popular on the roads of our country, despite its simplicity, not too comfortable interior and poor sound and vibration isolation. However, the "loaf" was originally produced by domestic manufacturers for military needs, due to which the machine is quite versatile and has a large capacity.
Now UAZ is quite often used as ambulances, the Ministry of Emergency Situations and the police. The owners of these cars love them for their good cross-country ability, reliability and low cost of maintenance.
General characteristics
Despite the fact that many off-road vehicles manufactured by well-known American, German, Asian and other foreign car manufacturers are inferior to UAZ in terms of cross-country ability, even a domestic “loaf” can get stuck in serious off-road conditions. In this regard, many motorists strive to endow their " iron horse»All the best qualities off-road vehicle. One of the many options is a do-it-yourself UAZ "loaf" suspension lift.
Since the UAZ is quite simple in technical design, it provides many tuning options, including the suspension. The lightest and in a simple way the increase in ground clearance is the installation of new wheels on the car. Putting wheels of greater width and height on the "loaf", you can achieve the most even distribution of pressure on the soil. Thanks to this, it becomes possible to overcome swampy areas, to pass, without touching the suspension, over large stones and bumps. The only drawback of this method is the need to change the car body, namely to expand the arches by cutting out the fenders and replacing them with new ones corresponding in size to the enlarged wheels.
The higher - the better the cross-country ability
But in order to significantly increase ground clearance, one wheel change will not be enough. In this case, most motorists carry out the UAZ "loaf" suspension lift with their own hands. There are some recommendations, adherence to which will allow you to avoid many mistakes and correctly perform the lift.
To begin with, it is worth noting that there are two ways to raise the UAZ. One is the car body lift, the other is the suspension lift. The first method is the easiest and at the same time the safest. This is explained by the fact that with a body lift, the center of gravity is practically not transferred, allowing you to maintain the stability of the car when cornering and off-road. This tuning is carried out by placing spacers (most often aluminum) between the car frame and the body. By performing a body lift, you can increase the ground clearance by a maximum of 15 centimeters.
The suspension lift leads to a significant improvement in the vehicle's off-road performance. However, this method is associated with some risk, since the center of gravity is shifted much higher, as a result of which the car loses stability when cornering and when driving fast on uneven surfaces.
How to perform a suspension lift
When lifting the UAZ "loaf" suspension with your own hands, you must remember about the shift in the center of gravity of the machine. Therefore, when deciding on what height to raise your car, it is important to observe:
- a rational relationship between increased cross-country ability and the likelihood of rollover;
- the maximum possible angle of inclination of the universal joint, exceeding the value of which will lead to the loss of performance of the parts.
These are the roads you have to wade
You can reduce the risk of rollover and improve safety when driving off-road by following these steps.
- Increase track width by installing wheel spacers.
- Fit to car wider wheel disks and rubber.
- It is recommended to additionally replace the factory bridges with bridges of other models, for example, "Spicer".
You can expand the track of the UAZ by installing disc brakes on it. This method allows you to increase the distance between the wheels by approximately 5 centimeters.
To eliminate the likelihood of problems with the gimbals after the lift, you can use one of the following methods.
- When you need to make the elevator larger, you can put elongated cardan shafts from other car models or spacers between cardan and bridge flanges.
- Make a suspension lift so that, as a result, the values of the angles of inclination of the universal joints are close to the maximum permissible indicators, but do not exceed them. For the UAZ 452, this critical value is about 8 centimeters.
- If you need to increase the elevator even more the best option there will be installation on the UAZ from the side of the transfer case of double crosspieces with a bearing. You can try to turn the gearboxes of the axles of the car so that the angle of inclination of the cross near the shank has the smallest value. The propeller shaft joints will function normally if they are installed in a single plane. Otherwise, excessive vibration will appear, which will lead to early wear and loss of performance.
Advanced all-terrain vehicle
Each of these methods is used in order to increase the ground clearance in the car, the choice depends only on the desired final height. These methods are suitable for almost all UAZ models, for example, for tuning the UAZ Patriot or UAZ 469 suspension.
The height to which the "loaf" is to be lifted and the method of making the lift are determined in this way. When driving off-road with a large number of stones, stumps, logs, as well as, if necessary, to overcome ditches, precipices and embankments, a high position of the car frame will be useful. And if you need to drive through swampy terrain or get out of a deep rut, the distance from the frame to the ground does not really matter, because the vehicle's permeability depends only on the ground clearance, which is determined by the height of the wheels.
It is the suspension lift that allows you to install wheels on the UAZ bigger size, helping to increase the vehicle's cross-country ability. As a result, the increased clearance from the ground to the frame allows you to effectively overcome uneven surfaces with various obstacles.
