Types of rear axle gearbox gas 3307. Gearbox: a simple way to change the movement

The use of a gearbox in cars, or a device that provides transmission and conversion of torque, is quite justified and is a standard way of regulating the rotation of car wheels.

This is what the rear axle gearbox of a GAZ 3309 looks like

The design of the rear axle of the GAZ-3309 also provides for the installation of this device. Not only comfortable movement by car, but also traffic safety largely depends on its proper operation. Therefore, knowledge of the main design points, signs of malfunction and repair methods will greatly help the driver to promptly notice problems in the operation of the gearbox and eliminate any malfunctions that have arisen.

The rear axle of the GAZ-3309 car contains a pre-installed gearbox, identical to that used on the previous model of this line, GAZ-3307.

Rear axle gearbox design

It consists of the following main parts:

Cast iron crankcase, connected to the rear axle housing by means of a bolted connection; To ensure tightness, a paranitic gasket is used.
The drive gear is complete with couplings, bearings and flanges, directly connected to the driveshaft.
The main transmission gears are of the hypoid type, with a deviation from the drive axis of 32 mm.
A differential assembly, including tapered bearings, installed and bolted in the crankcase sockets under the covers, as well as an axle gear with four satellites located on the spider spikes.

One of the characteristics of a gearbox is the gear ratio, or the ratio of the number of teeth in the driven gear to their number in the drive gear.

The standard rear axle gearbox of the GAZ-3309 has a ratio of 6.83, that is, the number of teeth in a pair is 41 and 6, respectively. Some configurations of this vehicle have pre-installed models with a gear ratio of 4.55 (pair 41 to 9), which provides a higher speed mode module operation.

To ensure reliable operation of the gear mechanism and better movement of all parts, oil is poured into the crankcase through a special hole. When filling with oil, the following points must be taken into account:

The process of changing the oil in the gearbox

The volume of oil to be filled is 8.2 liters.
It is recommended to use TSp-14gip or SAE 85W-90 oil for refueling.
The frequency of oil changes is 50 thousand kilometers or more often in case of intensive operation with maximum load.
When pouring or adding oil, the quantity is controlled visually, that is, you need to pour oil until it begins to flow out over the edge.

Diagnostics of malfunctions of the gear mechanism of the rear axle of GAZ-3309

The initial diagnosis of the gear unit, as well as the rear axle as a whole, is to determine the presence of extraneous sounds when driving by ear.

Depending on the type and nature of newly appeared sound changes, possible faults can be assessed and localized in advance. You can identify some typical sounds of a faulty gear unit and determine the stages of repair.

View of the rear axle GAZ-3309

Sound characteristic Cause
Loud noise coming from the gearbox
Poor fastening of the drive gear
Incorrect setting of the nominal distance in the differential module or it has reached the output limit value
Bearing failure
Excessive howling at a high pitch,
accompanied by bridge overheating

This is what the rear axle gearbox looks like

Reduced lubricant level in the crankcase
Incorrect installation of internal contacts in the main gears
Whistling sound Lack of lubrication in the cardan connection module
Appearance of a noise effect with periodic occurrence
The driven gear is poorly secured
Misalignment in the installation of this part

Continuous grinding and crunching
Chips in gear teeth
Bearing failure
Excessive noise when cornering
Incorrect operation of the differential module, in particular, satellites
Violation of the gap setting in the differential module
Noise when starting to accelerate

The life of the differential module is exhausted or the gaps are set incorrectly
Noise when the engine is braking
Excessive backlash vibrations in the drive gear bearings or their service life.
The presence of foreign particles in the oil
Excessive knocking noises when starting to move
Differential module fault
Presence of greater clearance in gears

The appearance of these sounds requires immediate repairs, usually accompanied by dismantling the rear axle to remove the gear unit.

External view of the rear axle GAZ 3309

It should be noted that before proceeding with a major overhaul of the mechanism, it is advisable to additionally make sure that the disturbing sound comes directly from this part of the car.

Similar noises can accompany wear on the wheel bearings. To eliminate this possibility, you need to use a jack to hang the rear wheels one by one and spin them. If a characteristic sound appears, replace the hub bearings and re-check the rear axle gearbox of the GAZ-3307/3309 for the presence of extraneous sounds.

It is possible to eliminate some types of sound deviations without resorting to complete disassembly of the module.

Troubleshooting without disassembling the gearbox

Some deviations from the normal operation of the gear module are associated with a lack of oil in its block, its leakage or its poor quality, so the preliminary, simplest action would be to change the oil and provide the structural parts with constant high-quality lubrication.

When replacing, you need to pay attention to the following points:

The condition of the breather, a device that ensures equalization of internal and external pressure, as well as preventing contamination of internal surfaces. Contamination of the breather itself will cause oil leaks caused by excess internal pressure.

Therefore, periodic cleaning, checking its functionality or replacing it with a working one are among the activities carried out as part of the maintenance of the rear axle.

The tightness of the connection between the crankcase and the gearbox housing and the rear axle; When loosening the fastening, the bolts must be tightened. The tightening force is 10–12 kgm. If oil leakage continues through this connection, the oil seal, gasket and mounting bolts must be replaced.

Another module that requires lubrication is the drive gear oil seal bore. To check this unit, it is necessary to disconnect the propeller shaft with preliminary installation of connecting marks, unscrew the fastening nut and flange, and lubricate the hole. If during this procedure it turns out that the shank of the gear module has traces of oil, then it is necessary to additionally replace the oil seal.

It should be noted that the driveshaft must be disconnected with the rear part of the car suspended until the wheels rotate freely and the gear is set to neutral.

If such actions do not lead to the elimination of unnecessary sounds, it is necessary to disassemble the gear unit itself.

Wholesale / Retail
Cash payment, Cashless payment
Pickup, Delivery by transport company, Delivery by company fleet
Car make: GAZ;
Vehicle type: truck;
Country of origin: Russia;
Original/analogue: original
Rear axle GAZ 3309 (3309-2400012) 1 year warranty Applicable on GAZ-3309 vehicles with ABS We offer you an extended warranty on the product for one year excluding mileage. You can also purchase rear and front axles for GAZ, PAZ

Parts of the rear axle of trucks GAZ-3307, GAZ-3309

The box-section rear axle housing of the GAZ-3309, GAZ-3307 vehicles is welded from stamped steel casings, to which are welded the rear cover, spring cushions, axles with flanges for installing brake mechanisms and wheel hubs, and a reinforcement for mounting the gearbox.

The design of the gearbox and rear axle hubs is shown in Fig. 1 and 2.

Rice. 1. Rear axle gearbox GAZ-3307, 3309

1 - front cover; 2 - coupling with outer rings of bearings; 3, 19, 23, 31, 34 - bolts; 4, 20 - gaskets; 5, 9, 29, 33 - nuts; 6 - drive gear; 7- flange adapter; 8 - flange with reflector; 10 - cuff; 11 - oil sump ring; 12, 15, 17, 21 - bearings; 13 - adjusting shims; 14 - adjusting ring; 16, 38 - plugs; 18 - retaining ring; 22 - axle gear; 24, 36 - support washers; 25, 28 - differential boxes (right and left); 26 - cross; 27 - driven gear; 30 - differential bearing cover; 32 - locking plate; 35 - satellite; 37 - adjusting screw; 39 - bushing; 40 - oil intake pipe; 41 - gear housing

The rear axle gearbox of GAZ-3307, GAZ-3309 is assembled in a separate cast housing 41 (see Fig. 1) made of high-strength cast iron, which is installed in the hole in the axle housing and secured with bolts 34.

The gearbox housing contains a 2 bearing clutch with drive gear b, flange 8 and flange adapter 7, as well as a differential, the housing of which consists of right 25 and left 28 boxes connected by bolts 23. Driven gear 27 is secured to the left box with bolts and nuts.

The main gears of the GAZ-3309, 3307 rear axle gearbox are hypoid. The axis of the drive gear is shifted downwards relative to the axis of the driven gear by 32 mm.

The preload of the drive gear bearings is adjusted by ring 14 located between the inner races of tapered bearings 12 and 15. To prevent excessive deformation of the driven gear, a stop is installed in the crankcase, adjustable by screw 37.

The differential assembly with tapered bearings 21 is installed in the sockets of the gearbox housing, closed with covers 30 secured with bolts.

The preload of the differential bearings is adjusted with nuts 33. The same nuts are used to adjust the lateral clearance in the meshing of the main gear gears.

In the differential housing of the GAZ-3307, 3309 axle gearbox, gears 22 of the axle shafts and four satellites 35 are installed, located on the spikes of the crosspiece 26.

Support washers 24 and 36 are installed under the satellites and side gears. Axle shafts 2 are inserted into the spline holes of the side gears (Fig. 2), flanged to the wheel hub with nuts and studs.

The rear wheel hubs rotate on tapered roller bearings 4 and 5, mounted on the axles of the GAZ-3307, 3309 rear axle. The bearing is fastened and adjusted with a nut 15 screwed onto the threaded end of the crankcase axle.

The adjusting nut is locked with washer 16 and nut 11. On the inside of the hub there is a cuff 11 installed, which prevents lubricant from leaving the hub, and an oil deflector 8 with an O-ring and a tube to protect the brake linings from oil.

Rice. 2. Rear axle hub GAZ-3307, 3309

1 - bolt; 2 - axle shaft; 3 - gasket; 4, 5 - bearings; 6 - brake drum; 7 - ABS rotor; 8 - oil deflector with sealing ring and tube; 9, 18 - nuts; 10 - bushing; 11 - cuff; 12 - rear brake; 13 - thrust ring; 14 - hub: 15, 17 - bearing nuts; 16 - lock washer

Removing the rear axle of GAZ-3307, GAZ-3309 cars

Removing the bridge from the vehicle must be carried out in the following order:

Loosen the rear wheel nuts

Disconnect the driveshaft from the drive gear flange adapter (from the drive gear flange);

Disconnect the parking brake drive cables from the equalizer;

Disconnect the brake system hoses and remove the brake pipes. Disconnect electrical cables and ABS sensors;

Unscrew the nuts securing the spring ladders, remove the ladders, pads and spring linings;

Before disassembling, you must unscrew the drain plug and drain the oil.

Disassembly of the rear axle of GAZ-3309, 3307 must be carried out in the following order:

Unscrew the nuts securing the axle shafts and remove the axle shafts using the dismantling bolts

Remove the axle shaft flange gaskets;

Unscrew the locknut of the outer hub bearing, remove the lock washer, unscrew the inner nut of the hub bearing;

Remove the brake drum and hub assembly;

Press out the seal, thrust washer and inner race of the bearing. The cuff must be replaced when the working edge hardens or there are cracks due to rubber aging;

In case of bearing replacement, press out the outer ring of the inner bearing from the rear axle hub of GAZ-3307, 3309 using a puller and gripper. Place the gripper legs under the end of the ring and spread them all the way by screwing the bolt into the axle. Remove the bearing ring by rotating the puller screw;

Press out the outer ring of the outer hub bearing in the same way;
- unscrew the fastening bolts and remove the oil deflector assembly;

Unscrew the nuts, remove the bolts securing the ends to the crankcase flange and remove the brake assembly and oil deflector brackets;

Unscrew the nuts of the mounting bolts and remove the drive gear flange adapter;

Unscrew the bolts securing the gearbox to the crankcase and remove the gearbox using the dismantling bolts;

Remove the gearbox gasket;

Unscrew the breather;

To remove a worn cuff bushing from the crankcase axle, remove a layer of metal from the surface of the bushing with a depth of at least 3 mm in two diametrically opposite places and cut the bushing with a chisel without damaging the surface of the axle crankcase axle axle.

Dismantling the rear axle gearbox GAZ-3307, 3309

The gearbox must be disassembled in the following order:

Unscrew the inspection hole plug;

Unscrew the plug of the oil intake pipe;

Unscrew the fastening bolt and remove the spring, plate and tube from the oil channel;

Unlock and unscrew the adjusting screw of the stop;

Remove the bushing and spring ring from the adjusting screw;

Unscrew the bolts securing the locking plates of the differential bearing nuts, remove the locking plates;

Unscrew the adjusting nuts 33 (see Fig. 1) using a special wrench.

Disassembly of the rear axle gearbox of GAZ-3309, 3307 must be carried out in the following order:

Unscrew the nut on the drive gear shank;

Unscrew the nut and remove the washer;

Remove the drive gear flange of the rear axle reducer;

Remove the front cover, gasket and oil sump ring;

Remove the bearing coupling along with the inner ring of the front tapered bearing;
- remove the adjusting ring;

In case of replacement, compress the inner ring of the rear tapered bearing using a puller, installing the liners into it.

To remove the bearing ring, compress the support nuts with the support nuts until the shoulders of the liners contact the end of the inner ring of the bearing or the thrust shoulder of the inner ring rollers; to do this, it is necessary to remove the rollers.

Disassembly of the GAZ-3307, 3309 axle differential must be carried out in the following order:

Unscrew the nuts and remove the bolts securing the driven gear to the differential boxes;

Remove the driven gear from the differential box;

Bend the locking plate, unscrew the bolt and remove the oil trap;

In case of replacement, press the inner rings of the bearings from the right and left differential boxes. To do this, you need to use a puller with liners;

Unscrew the bolts securing the differential boxes, disconnect the boxes, remove the crosspiece, axle gears, support washers, remove the support washers and satellites from the crosspiece.

Adjusting the final drive of the rear axle GAZ-3307, 3309

The bearings and gearing of the main gears of GAZ-3309, 3307 are adjusted at the factory and, as a rule, do not require adjustment in operation. Their adjustment is necessary only after reassembling the bridge and when replacing any parts or when there is significant wear on the bearings.

The lateral clearance in the meshing of the main gears, which has increased due to tooth wear, cannot be reduced by adjustment, as this will lead to a disruption of the meshing of the teeth. This will result in increased noise or tooth breakage.

Play in tapered bearings should be eliminated without disturbing the relative position of the driven and drive gears. Below is the procedure for making various adjustments.

Adjusting the preload of the drive gear bearings of the GAZ-3307, 3309 gearbox

The need for bearing adjustment can be determined by the presence of axial play in the drive gear shaft.

Axial play is measured using an indicator device (the flange adapter is removed) when moving the drive gear shaft from one extreme position to another, and in the absence of a device, by rocking the flange by hand.

If, after tightening the nut, the moment of resistance to rotation of the drive gear of the main drive of the rear axle is greater than the norm specified below, it means that the ends of the inner rings of the bearings and the adjusting ring are heavily worn.

If the thickness of the adjusting ring exceeds the required one, then tightening the nut will not eliminate the backlash and increase the resistance when the drive gear rotates in the bearings.

In this case, it is necessary to adjust the preload of the axle main drive bearings by reducing the thickness of the adjusting ring installed between the inner rings of the tapered bearings.

To do this you need to do the following:

Remove the drive gear assembly;

Unscrew the flange mounting nut;

Remove the flange, oil seal cover, oil sump ring, outer bearing inner race and adjusting ring. Select an adjusting ring with a thinner thickness.

The reduction in ring thickness should be equal to the sum of the axial play measured by the indicator and the value of 0.05 mm (bearing preload).

Reassemble the coupling in reverse order and tighten the nut. When tightening the nut, it is necessary to rotate the drive gear of the main gear reducer GAZ-3309, 3307 for proper installation of the rollers in the bearings. Tighten the nut with the torque specified above, and one of its slots should coincide with the hole for the cotter pin.

You cannot even turn the nut back a little so that the hole for the cotter pin matches the slot of the nut, since insufficient tightening may cause the inner ring of the outer bearing to rotate, wear out the adjusting ring, and, as a result, increase the backlash of the drive gear.

Check the tightness of the bearings. With proper adjustment, the moment of resistance to rotation of the drive gear should be in the range of 1.5-3.0 Nm (0.15-0.30 kg/cm). The test should be carried out using a dynamometer.

To do this, clamp the coupling in a vice, hook the dynamometer hook onto the flange hole and smoothly turn the gear. The readings on the dynamometer scale should be in the range of 29-51 N (2.9-5.1 kgf).

If the moment of resistance to rotation of the bearings is within the normal range, you need to tighten the nut and install the drive gear assembly into the rear axle housing, otherwise you need to repeat the adjustment.

If it turns out that the torque resistance to rotation is less than the required one, it is necessary to reduce the thickness of the adjusting ring, and if it exceeds the required one, then it is necessary to select a ring of greater thickness.

Cars of the GAZ-53 family have not been produced since 1993, but they are still widely used in various fields. This is largely due to the simple design and reliability of its systems, units and mechanisms. This fully applies to the transmission, which will be discussed in this article.

s; . GAZ-53-12 (1983 - 1993) with a carrying capacity of 4.5 tons. In 1993, the GAZ-53 niche was occupied by more modern trucks of the GAZ-3307 (produced since 1989) and GAZ-3309 (since 1994) families, which, however, are conceptually and fundamentally no different from the GAZ-53 family. All trucks, regardless of modifications, have fundamentally the same transmission. They are built according to the classic design - these are rear-wheel drive cars (4x2 wheel arrangement) with a front-mounted engine, a manual transmission and a conventional dry single-plate clutch. The transmission structure of the GAZ-53 family of cars is quite simple, let’s look at it in more detail. The structure of the GAZ-53 transmission and the purpose of its components The transmission of GAZ-53 trucks is traditional for two-axle rear-wheel drive vehicles; it includes several components: . Clutch (dry single disc); . Transmission (4-speed manual

Gearbox: an easy way to change motion

A device for converting and transmitting torque - a gearbox - is very widely used in technology. There was a place for the gearbox in the car, and not just one, but several at once. Read about what a gearbox is, what gearboxes are used in cars and for what purposes in this article.

Onboard (or wheel) gearboxes are very often used. Special mention needs to be made about each type of gearbox. Drive axle gearbox. This gearbox is necessary to transmit and change torque from the gearbox (via the driveshaft) to the wheels. At the same time, the drive axle ensures that the wheels rotate at different speeds when cornering, on uneven or slippery roads, and in other cases - this is achieved by using a differential based on a planetary mechanism. Onboard (wheel) gearboxes. This gearbox is installed at each wheel; it converts torque from the drive axle gearbox and transmits it directly to the wheel. This solution somewhat complicates the design of the car (since in this case three gearboxes are installed on one axle - a central one and two onboard ones), however, it has several advantages: - Ground clearance increases by reducing the size of the central gearbox; - Can be used in different cars

PAZ buses with automatic transmission: new cars for modern cities

Pavlovsk Bus Plant has been producing its buses since 1952, and all these sixty years PAZs have been faithfully serving in Russian cities and villages. In recent years, PAZ has set a course for modernization and the creation of truly modern machines. Among the plant's new products are PAZ city buses equipped with an automatic transmission. These machines will be discussed in this article.

Cars and buses are traditionally equipped with manual transmissions, since only they are able to provide the necessary dynamic characteristics of heavy vehicles. However, city buses are a completely different matter; they have been equipped with automatic transmissions for quite a long time, although this has never been a mass phenomenon in our country. A big step in this direction was made by the Pavlovsk Bus Plant, which since 2007 began installing automatic transmissions on its small bus PAZ-3237, and in the spring of 2013 introduced a completely new model of the medium-sized city bus PAZ-320412-05 “Vector” with an American automatic transmission Allison. The bus was created on the basis of earlier models, so the PAZ spare parts of the new models are unified with the more common old Pavlovsk buses. Work on medium-sized PAZ city buses with automatic transmission began in 2010; today the plant produces only one model, but this bus has already proven itself well.

Play in tapered bearings should be eliminated without disturbing the relative position of the driven and drive gears. Below is the procedure for making various adjustments.

Adjusting the preload of the drive gear bearings of the GAZ-3307, 3309 gearbox.

The need for bearing adjustment can be determined by the presence of axial play in the drive gear shaft. Axial play is measured using an indicator device (the flange adapter is removed) when moving the drive gear shaft from one extreme position to another, and in the absence of a device, by rocking the flange by hand.

If there is axial play of the drive gear in tapered bearings of more than 0.03 mm, you must first tighten the flange nut. To do this, unscrew the nut and tighten it to a torque of 280-400 Nm (28-40 kg/cm). If, after tightening the nut, the moment of resistance to rotation of the drive gear of the main drive of the rear axle is greater than the norm specified below, it means that the ends of the inner rings of the bearings and the adjusting ring are heavily worn.

In this case, to adjust the bearings, it is necessary to select a thicker ring. Adjusting rings, produced in thicknesses of 12.10-12.94 mm, are divided into 22 groups. The thickness of the rings of adjacent groups differs by 0.04 mm. If the thickness of the adjusting ring exceeds the required one, then tightening the nut will not eliminate the backlash and increase the resistance when the drive gear rotates in the bearings.

In this case, it is necessary to adjust the preload of the axle main drive bearings by reducing the thickness of the adjusting ring installed between the inner rings of the tapered bearings.

To do this you need to do the following:

· - remove the drive gear assembly;

· - unscrew the flange mounting nut;

· - remove the flange, oil seal cover, oil sump ring, inner ring of the outer bearing and the adjusting ring. Select an adjusting ring with a thinner thickness.

The reduction in ring thickness should be equal to the sum of the axial play measured by the indicator and the value of 0.05 mm (bearing preload).

ETO During daily maintenance, it is necessary to wash the frame and other components and parts of the chassis, check the condition of the springs and shock absorbers.

Fastening works. Check the reliability of fastening the cargo platform to the frame by lightly hitting the rivet fastenings with a hammer. All bolted connections must be fully tightened. When checking the rear wheel fastenings, first loosen the outer wheel fastening nuts, tighten the inner wheel fastening nuts, and then tighten the outer wheel fastening nuts. When checking the fastening of the front suspension shock absorbers and their brackets, check the condition of the rubber bushings of the shock absorbers and fluid leakage. There should be no cracks, dents, or play in the shock absorber lugs on the fingers. If liquid leaks through the seals, it is necessary to tighten the reservoir nut from the tightening moment to 6 - 7 kg. The wheels must be securely fastened; there should be no knocking or squeaking when the wheel is rocked. Control and adjustment work. The front wheels are suspended, and by sharply rocking the wheels, check the ease of rotation of the wheels and play in the bearings. There should be no axial play in the front wheels. Otherwise, unscrew the hub cover mounting bolts and carefully remove the cover so as not to damage the gasket. Then you need to bend the lock washer, unscrew the lock nut, remove the lock ring and lock washer, tighten the adjusting nut, turning the wheel until it rotates tightly to ensure proper placement of the rollers in the bearings, unscrew it half a turn and check the rotation of the wheel. After adjustment, the wheel should rotate freely without noticeable play in bearings. After this, install the lock ring and the lock washer so that its protrusion fits into one of the holes in the lock ring. Screw the lock nut all the way, bend the lock washer onto the lock nut, install and secure the hub cover and lower the front wheels. On the way, they finally check the adjustment of the bearings based on the heating of the wheel hub. TO-2 Fastening works. Check the fastening of the fenders, trim, brackets, running boards to the brackets, brackets to the car frame. When the parts being tested are shaken sharply, no creaking or rattling should be heard. Loose connections are tightened with wrenches. Check the tightness of the nuts on the front and rear wheels of the vehicle, the spare wheel bracket latches, bumper, tow hooks and brackets. When checking the fastening of the rear wheels, first loosen the outer wheel nuts, tighten the inner wheel nuts, and then tighten the outer wheel nuts. All bolted connections must be fully tightened. There should be no loosening of the fuel tank, platform mudguards, or hood. Check the engine mounts on the front and rear mounts and the jet thrust mounts by removing the engine mudguards. If the fastening is weakened, uncotter it, tighten the nuts of the front supports with a tightening torque of up to 8–10 kgm, the rear support with a tightening torque of up to 20–25 kgm and tighten them again. The tension of the threaded connections of the jet thrust fastenings should provide a shock-absorbing effect of the buffer without visible movements of the engine on the frame. Check the fastening of the front suspension shock absorbers and their brackets. The shock absorber mounting pin nuts on the front axle beam and on the frame bracket must be fully tightened; damage to the rubber bushings of the shock absorbers and fluid leakage are not allowed. If a leak is detected through the seals, you need to remove the shock absorber and tighten the reservoir nut with a tightening torque of up to 6 - 7 kgm. The tightening torque of the nut securing the bipod to the shaft should be in the range from 25 to 30 kgm. Check the fastening of the exhaust pipe of the muffler and the muffler to the frame. The passage of gases at the connection points is not allowed. Check the fastening of the front, rear and additional springs, the cab to the frame. The leaf springs must not have cracks or kinks; the fastening of clamps and spring ladders must be reliable. Tighten the stepladder nuts evenly with a tightening torque of up to 25–30 kgm and a tightening torque of the detachable lugs of 5–10 kgm. Rubber buffers limiting the travel of springs and their gaskets must not be damaged or loosened. Make sure that the brackets, gaskets, bolts and nuts securing the cabin to the frame are in good condition.

ETO During daily maintenance, it is necessary to wash the frame and other components and parts of the chassis, check the condition of the springs and shock absorbers. TO-1 Fastening works. Check the reliability of fastening the cargo platform to the frame by lightly hitting the rivet fastenings with a hammer. All bolted connections must be fully tightened. When checking the rear wheel fastenings, first loosen the outer wheel fastening nuts, tighten the inner wheel fastening nuts, and then tighten the outer wheel fastening nuts. When checking the fastening of the front suspension shock absorbers and their brackets, check the condition of the rubber bushings of the shock absorbers and fluid leakage. There should be no cracks, dents, or play in the shock absorber lugs on the fingers. If liquid leaks through the seals, it is necessary to tighten the reservoir nut from the tightening moment to 6 - 7 kg. The wheels must be securely fastened; there should be no knocking or squeaking when the wheel is rocked. Control and adjustment work. The front wheels are suspended, and by sharply rocking the wheels, check the ease of rotation of the wheels and play in the bearings. There should be no axial play in the front wheels. Otherwise, unscrew the hub cover mounting bolts and carefully remove the cover so as not to damage the gasket. Then you need to bend the lock washer, unscrew the lock nut, remove the lock ring and lock washer, tighten the adjusting nut, turning the wheel until it rotates tightly to ensure proper placement of the rollers in the bearings, unscrew it half a turn and check the rotation of the wheel. After adjustment, the wheel should rotate freely without noticeable play in bearings. After this, install the lock ring and the lock washer so that its protrusion fits into one of the holes in the lock ring. Screw the lock nut all the way, bend the lock washer onto the lock nut, install and secure the hub cover and lower the front wheels. On the way, they finally check the adjustment of the bearings based on the heating of the wheel hub. TO-2 Fastening works. Check the fastening of the fenders, trim, brackets, running boards to the brackets, brackets to the car frame. When the parts being tested are shaken sharply, no creaking or rattling should be heard. Loose connections are tightened with wrenches. Check the tightness of the nuts on the front and rear wheels of the vehicle, the spare wheel bracket latches, bumper, tow hooks and brackets. When checking the fastening of the rear wheels, first loosen the outer wheel nuts, tighten the inner wheel nuts, and then tighten the outer wheel nuts. All bolted connections must be fully tightened. There should be no loosening of the fuel tank, platform mudguards, or hood. Check the engine mounts on the front and rear mounts and the jet thrust mounts by removing the engine mudguards. If the fastening is weakened, uncotter it, tighten the nuts of the front supports with a tightening torque of up to 8–10 kgm, the rear support with a tightening torque of up to 20–25 kgm and tighten them again. The tension of the threaded connections of the jet thrust fastenings should provide a shock-absorbing effect of the buffer without visible movements of the engine on the frame. Check the fastening of the front suspension shock absorbers and their brackets. The shock absorber mounting pin nuts on the front axle beam and on the frame bracket must be fully tightened; damage to the rubber bushings of the shock absorbers and fluid leakage are not allowed. If a leak is detected through the seals, you need to remove the shock absorber and tighten the reservoir nut with a tightening torque of up to 6 - 7 kgm. The tightening torque of the nut securing the bipod to the shaft should be in the range from 25 to 30 kgm. Check the fastening of the exhaust pipe of the muffler and the muffler to the frame. The passage of gases at the connection points is not allowed. Check the fastening of the front, rear and additional springs, the cab to the frame. The leaf springs must not have cracks or kinks; the fastening of clamps and spring ladders must be reliable. Tighten the stepladder nuts evenly with a tightening torque of up to 25–30 kgm and a tightening torque of the detachable lugs of 5–10 kgm. Rubber buffers limiting the travel of springs and their gaskets must not be damaged or loosened. Make sure that the brackets, gaskets, bolts and nuts securing the cabin to the frame are in good condition.

Introduction

Diagnostics of GAZ-3307 drive axles

Maintenance of GAZ-3307 drive axles

Main malfunctions of GAZ-3307 drive axles

Repair of GAZ-3307 drive axles

Safety requirements. For vehicle maintenance and repair

Bibliography

Introduction

GAZ-3307 And GAZ-3309- Russian trucks in the fourth generation family of medium-duty trucks produced by the Gorky Automobile Plant. The GAZ-3307 flatbed carburetor truck has been in mass production since the end of 1989, and the GAZ-3309 turbodiesel truck has been in production since mid-1994. The GAZ-3307 replaced the third-generation GAZ-52/53 family, which it completely replaced from the assembly line by the beginning of 1993. Trucks GAZ-3307 and GAZ-3309 with a load capacity of 4.5 tons are designed for operation on all types of paved roads and are characterized by high technical and operational indicators. The fourth family of GAZ trucks also included the 5-ton diesel truck GAZ-4301 (1984-1994) and the 3-ton diesel truck GAZ-3306 (1993-1995). Since 1999, the 2- and 2.3-ton off-road truck GAZ-3308 "Sadko" (4x4) has been produced, and since 2005 the 4-ton off-road truck GAZ-33086 "Countryman" has been produced.

Technical characteristics of the carburetor engine of the GAZ-3307 truck (2008 model)

Engine
model ZMZ-5231.10
description:

V-shaped, 8-cylinder, 4-stroke gasoline engine with liquid cooling, with a carburetor power supply system and an exhaust gas recirculation system (EGR), OHV valve mechanism, aluminum block and cylinder head, third environmental class (Euro-3).

working volume, l 4.67
compression ratio 7.6
gross power hp (kW) / rpm 124 (91.2) / 3200-3400

Max. gross torque, kgf m (N m) / rpm 30.5 (298) / 3000-3400

minimum specific fuel consumption g/hp h (g/kW) 240 (313)
weight, kg 275
fuel: motor gasoline A-76 “Normal” / AI-80 “Standard”

Drive axle of a car is a unit designed to increase torque in the cardan, distribute this moment, and also transmit it to the drive wheel axle, which increases the traction forces of the wheels. The increase in torque and its supply at an angle of 90° is ensured by the main gear; torque is distributed between the drive axles of the wheels using a differential, and is transmitted to the drive wheels by axle shafts.

Design and principle of operation of GAZ-3307 drive axles

The box-section rear axle housing of GAZ-3307, GAZ-3309 cars is welded from stamped steel casings, to which are welded the rear cover, spring cushions, axles with flanges for installing brake mechanisms and wheel hubs, and a reinforcement for mounting the gearbox.

Design of gearbox and rear axle hubs of GAZ-3307 vehicles.

Rear axle gearbox GAZ-3307,

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