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, conceptually and fundamentally do not differ from the GAZ-53 family. All trucks, regardless of modifications, have fundamentally the same transmission. They are built according to the classic scheme - these are rear-wheel drive cars (wheel arrangement 4 × 2) with a front engine, a manual transmission and a conventional dry single-plate clutch. The transmission device for cars of the GAZ-53 family is quite simple, let's dwell on it in more detail. The device 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: the easy way to change movement

The 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 one, but several at once. Read about what a gearbox is, what gearboxes and for what purposes are used in cars in this article.

onboard (or wheel) gearboxes are very often used. Each of the types of gearboxes needs to be said separately. Drive axle reducer. This gearbox is necessary to transmit and change the torque from the gearbox (through the propeller shaft) to the wheels. At the same time, the drive axle rotates the wheels 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) reducers. This gearbox is installed at each wheel, it converts the torque from the drive axle gearbox and transfers 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 at once - a central one and two side gears), however, it has several advantages: - The ground clearance is increased by reducing the dimensions of the central gearbox; - Different cars can use

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 serving faithfully in Russian cities and villages. In recent years, PAZ has taken a course towards modernization and the creation of truly modern machines. Among the new products of the plant 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 machines. However, city buses are a completely different matter, they have been equipped with automatic transmissions for quite some time, although this has never been a mass phenomenon in our country. A big step in this direction was made by Pavlovsk Bus Plant, which since 2007 began to install "automatic devices" on its small PAZ-3237 bus, and in the spring of 2013 presented a completely new model of the average city bus PAZ-320412-05 "Vector" with an American automatic transmission Allison. The bus was created on the basis of earlier models, therefore the PAZ spare parts of the new models are unified with the more common old Pavlovsk buses. Work on medium-sized city buses PAZ with automatic transmission began in 2010, today the plant produces only one model, but this bus has already proven itself well Wholesale / Retail
Cash payment, Cashless payment
Self-pickup, Delivery by a transport company, Delivery by a fleet of companies
Car make: GAZ;
Vehicle type: cargo;
Country of origin: Russia;
Original / analogue: original
Rear axle GAZ 3309 (3309-2400012) Warranty 1 year Applies to GAZ-3309 cars with ABS We offer you an extended warranty for the product for one year excluding mileage. You can also purchase rear and front axles for GAZ, PAZ

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

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

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

Figure: 1.Rear axle reducer GAZ-3307, 3309

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

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

A clutch of 2 bearings with a driving gear b, a flange 8 and an adapter 7 of the flange, as well as a differential, the housing of which consists of the right 25 and left 28 boxes, connected by bolts 23 are installed in the gearbox housing.

Gear wheels of the main transfer of the reducer of the rear axle GAZ-3309, 3307 are hypoid. The axis of the drive gear is offset downward relative to the axis of the driven gear by 32 mm.

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

The differential assembly with tapered bearings 21 is installed in the seats of the gearbox housing, covered with caps 30 fixed 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 final drive gears.

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

Support washers 24 and 36 are installed under the satellites and half-axle gears. Half-shafts 2 (Fig. 2) are inserted into the spline holes of the half-axle gears, attached with a flange to the wheel hub with nuts and pins.

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

The adjusting nut is locked with a washer 16 and a nut 11. On the inner side of the hub, a collar 11 is installed, which protects the lubricant from escaping from the hub, and an oil deflector 8 with an O-ring and a tube to protect the brake linings from oil ingress.

Figure: 2. Hub of the rear axle GAZ-3307, 3309

1 - bolt; 2 - semi-axis; 3 - gasket; 4, 5 - bearings; 6 - brake drum; 7 - ABS rotor; 8 - oil deflector with a sealing ring and a 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 cars GAZ-3307, GAZ-3309

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

Loosen the rear wheel nuts

Disconnect the propeller shaft from the drive gear flange adapter (from the drive gear flange);

Disconnect the parking brake cables from the equalizer;

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

Unscrew the nuts securing the ladders of the springs, remove the ladders, linings and on the masonry of the springs;

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

Dismantling the rear axle 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 bolt

Remove the axle shaft flange gaskets;

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

Remove the brake drum and hub assembly;

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

In case of replacement of bearings, press out the outer ring of the inner bearing from the rear axle hub GAZ-3307, 3309 using a puller and a gripper. Bring the gripper legs under the end face 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 in the same way the outer race of the outer bearing of the hub;
- unscrew the mounting 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 fastening 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 the worn cuff sleeve from the crankcase journal, remove a layer of metal from the surface of the sleeve with a depth of at least 3 mm in two diametrically opposite places and cut the sleeve with a chisel, without damaging the surface of the axle housing journal.

Dismantling of the gearbox of the rear axle GAZ-3307, 3309

Disassembly of the gearbox must be carried out in the following order:

Unscrew the control hole plug;

Unscrew the plug of the oil intake tube;

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

Unlock and unscrew the stop adjusting screw;

Remove the bushing and spring ring from the adjusting screw;

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

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

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

Unpin the nut on the drive pinion shank;

Unscrew the nut and remove the washer;

Remove the flange of the drive gear of the rear axle reducer;

Remove the front cover, gasket and oil wiper ring;

Remove the bearing sleeve together with the inner ring of the front tapered bearing;
- remove the adjusting ring;

In case of replacement, press the inner race of the rear tapered bearing using a puller, installing the bushings in it.

To remove the bearing ring, compress the supports with the nuts until the shoulders of the liners come into contact with the end face of the bearing inner ring or with the thrust shoulder of the inner ring rollers; for this, the rollers must be removed.

Disassembly of the differential of the GAZ-3307, 3309 bridge 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 lock plate, unscrew the bolt and remove the oil catcher;

In case of replacement, press the inner bearing races from the right and left differential boxes. To do this, use a puller with inserts;

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

Adjusting the main gear of the rear axle GAZ-3307, 3309

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

The lateral backlash in the meshing of the main gears, which has increased due to wear of the teeth, cannot be reduced by adjusting, as this will lead to a violation of the meshing of the teeth. As a result, noise will increase or tooth breakage may occur.

Backlash in tapered bearings should be eliminated without disturbing the mutual position of the driven and driving gears. Below is the procedure for making the various adjustments.

Adjustment of the preload of the bearings of the drive gear of the GAZ-3307, 3309 reducer

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

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

If there is an axial play of the drive gear in tapered bearings of more than 0.03 mm, you must first tighten the flange fastening nut. To do this, unfasten the nut and tighten with a torque of 280-400 Nm (28-40 kg / cm).

If, after tightening the nut, the torque of resistance to the rotation of the driving gear of the main drive of the rear axle is more than the norm indicated below, then the ends of the inner bearing rings and the adjusting ring are badly worn out.

In this case, a thicker ring must be selected to adjust the bearings. The adjusting rings, produced with a thickness 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 bearing preload of the main axle drive by reducing the thickness of the adjusting ring installed between the inner rings of the tapered bearings.

To do this, do the following:

Remove the drive gear assembly;

Unscrew the flange mounting nut;

Remove the flange, stuffing box cover, oil drip ring, outer bearing inner race and adjusting ring. Choose a thinner shim.

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

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

It is impossible even to turn the nut back a little to match the hole for the cotter pin with the slot in the nut, since insufficient tightening may result in the inner ring of the outer bearing turning, wear of the adjusting ring and, as a result, an increase in the backlash of the drive gear.

Check bearing tightness. With correct adjustment, the torque 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 check should be carried out with a dynamometer.

To do this, clamp the coupling in a vice, hook the dynamometer hook to the flange hole and smoothly turn the gear. The indications 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 cotter the nut and install the drive gear assembly in the rear axle housing, otherwise the adjustment must be repeated.

If at the same time 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 choose a ring of greater thickness.

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

It looks like the gearbox of the rear axle GAZ 3309

The design of the rear axle 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 points of the design, signs of malfunction and repair methods will largely help the driver to timely notice the malfunctions in the gearbox and eliminate the 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 GAZ-3307 line.

Rear axle reducer device

It consists of the following main parts:

1. A cast-iron crankcase that is bolted to the rear axle housing; to ensure tightness, a paranite gasket is used.
2. Drive gear complete with couplings, bearings and flanges, directly connected to the propeller shaft.
3. The main gears of the transmission are of a hypoid type, with a deviation from the driving axis by 32 mm.
4. An assembly of the differential, which includes tapered-type bearings, installed and bolted in the crankcase seats under the covers, as well as the semi-axle gear with four satellites placed on the spikes of the crosspiece.

One of the characteristics of the gear device is the gear ratio, or the ratio of the number of teeth in the driven gear to their number in the driving gear.

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

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

Gearbox oil change process

• The volume of the filled oil is 8.2 liters.
• It is recommended to use TSp-14gip or SAE 85W-90 oil for refueling.
• The oil change frequency is 50 thousand kilometers, or more often, in the case of intensive operation with full load.
• When filling or adding oil, the quantity is monitored visually, that is, the oil must be poured until it begins to flow over the edge.

Read also

GAZ-3309 gearbox repair

Since the gear unit is a rather complex mechanism, which involves the interconnected movement of many components at high speeds, mechanical wear of its parts is inevitable. Correct operation and timely diagnostics will help to avoid premature failure of gear parts when the vehicle is moving.

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

The initial diagnostics of the gear unit, however, like 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 the newly appeared sound changes, it is possible to assess and localize possible malfunctions in advance. You can highlight some typical sounds of a faulty gear unit and determine the stages of repair.

Rear axle view GAZ-3309

• Sound characteristic Cause
• Loud hum coming from the gearbox
• Poor pinion pinion
• Incorrect setting of the nominal distance in the differential module or it has reached the production limit
• Bearing failure
• Excessive howling in a raised tone,
• bridge overheating

It looks like a rear axle gearbox

• Lowering the lubricant level in the crankcase
• Incorrect installation of internal contacts in the main gears
• Whistling sound Lack of grease in the cardan joint module
• The appearance of a noise effect with periodic manifestation
• The driven gear is loose
• Misalignment in the installation of this part

• Continuous grinding and crunching
• Chips in the gear teeth
• Bearing failure
• Excessive noise when cornering
• Incorrect operation of the differential module, in particular, satellites
• Violation of setting the gaps in the differential module
• Noise at the start of acceleration

• Development of the resource of the differential module or incorrect setting of the clearances
• Noise during engine braking
• Excessive backlash vibrations in the bearings of the drive gear or their resource depletion
• The presence of foreign particles in the oil
• Excessive knocking when starting to move
• Differential module malfunction
• More clearance in the gears

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

External view of the rear axle GAZ 3309

It should be noted that before starting the 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 wheel bearing wear. To eliminate this probability, you need to hang out the rear wheels with a jack in turn and turn them. If a characteristic sound appears, replace the hub bearings and re-check the GAZ-3307/3309 rear axle gearbox for extraneous sounds.

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

Read also

Technical characteristics of GAZ-3309

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, therefore, the preliminary, simplest action will be to change the oil and provide the structural parts with constant high-quality lubrication.

When carrying out a replacement, you must pay attention to the following points:

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

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

The tightness of the connection between 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 continues to leak through this connection, the oil seal, gasket and retaining bolts must be replaced.

Another module that requires lubrication is the pinion 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, lubricate the hole. If during this procedure it turns out that the shank of the gearbox module has traces of oil, then it is necessary to additionally replace the oil seal.

It should be noted that the cardan must be disconnected with the rear part of the car hanging out until the wheels rotate freely and the neutral gear is installed.

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

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

The lateral backlash in the meshing of the main gears, which has increased due to wear of the teeth, cannot be reduced by adjusting, as this will lead to a violation of the meshing of the teeth. As a result, noise will increase or tooth breakage may occur.

Backlash in tapered bearings should be eliminated without disturbing the mutual position of the driven and driving gears. Below is the procedure for making the various adjustments.

Adjustment of the bearing preload of the drive gear of the GAZ-3307, 3309 reducer.

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

If there is an axial play of the drive gear in tapered bearings of more than 0.03 mm, you must first tighten the flange fastening nut. To do this, unfasten the nut and tighten with a torque of 280-400 Nm (28-40 kg / cm). If, after tightening the nut, the torque of resistance to the rotation of the driving gear of the main drive of the rear axle is more than the norm indicated below, then the ends of the inner bearing rings and the adjusting ring are badly worn out.

In this case, a thicker ring must be selected to adjust the bearings. The adjusting rings, produced with a thickness 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 bearing preload of the main axle drive by reducing the thickness of the adjusting ring installed between the inner rings of the tapered bearings.

To do this, do the following:

· - remove the drive gear assembly;

· - unscrew the flange fastening nut;

· - remove the flange, stuffing box cover, oil squeegee ring, outer bearing inner ring and adjusting ring. Choose a thinner shim.

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

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

It is impossible even to turn the nut back a little to match the hole for the cotter pin with the slot in the nut, since insufficient tightening may result in the inner ring of the outer bearing turning, wear of the adjusting ring and, as a result, an increase in the backlash of the drive gear.

Check bearing tightness. With correct adjustment, the torque 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 check should be carried out with a dynamometer.

To do this, clamp the coupling in a vice, hook the dynamometer hook to the flange hole and smoothly turn the gear. The indications 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 cotter the nut and install the drive gear assembly in the rear axle housing, otherwise the adjustment must be repeated.

If at the same time 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 choose a ring of greater thickness.

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

Fastening work. The reliability of fastening the cargo platform to the frame is checked by light hammer blows on the rivets. All bolted connections must be fully tightened. When checking the rear wheel mountings, first loosen the outer wheel mounting nut, tighten the inner wheel mounting nuts, and then tighten the outer wheel mounting nuts. When checking the fastening of the front suspension shock absorbers and their brackets, check the condition of the shock absorber rubber bushings, fluid leakage. There should be no cracks, dents, or backlash of the shock absorber eyes on the fingers. If fluid leaks through the oil seals, it is necessary to tighten the reservoir nut from the tightening torque to 6 - 7 kg. The wheels must be securely fastened, there should be no knocks and squeaks when the wheel is swinging. Control and adjustment work. Hang up the front wheels, check the ease of rotation of the wheels and play in the bearings with a sharp swing of the wheels. There should be no axial play of the front wheels. Otherwise, unscrew the bolts securing the hub cover 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 the lock washer, tighten the adjusting nut, turning the wheel until tight rotation for correct placement of the rollers in the bearings, unscrew half a turn and check the wheel rotation. After adjustment, the wheel should rotate freely without noticeable play in bearings. After that, the lock ring and the lock washer are installed so that its protrusion enters one of the holes of the lock ring. Turn the lock nut until it stops, bend the lock washer onto the lock nut, put and fix the hub cover and lower the front wheels. On the way, they finally check the adjustment of the bearings for heating the wheel hub. TO-2 Fastening work. Check the attachment of the fenders, cladding, brackets, footboards to the brackets, brackets to the car frame. No squeaking or rattling should be heard when the parts to be tested are shaken sharply. Loose connections are tightened with wrenches. Check the tightness of the nuts of the front and rear wheels of the vehicle, the latch of the spare wheel bracket, bumper, tow hooks and brackets. When checking the rear wheel attachment, first loosen the outer wheel attachment nuts, tighten the inner wheel attachment nuts, and then tighten the outer wheel attachment nuts. All bolted connections must be fully tightened. There should be no loosening of the fastening of the fuel tank, platform mud flaps, hood. Check the engine mount on the front and rear supports, the jet thrust mount by removing the engine mudguards. If the fastening is loosened, it is unpinned, the nuts of the front supports are tightened with a tightening torque of up to 8-10 kgm, the rear support with a tightening torque of up to 20-25 kgm, and the cotter pins are again fastened. The tension by the threaded joints of the reactive thrust fastening must ensure the damping 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 nuts of the shock absorber mounting fingers on the front axle beam and on the frame bracket must be fully tightened; destruction of the shock absorber rubber bushings and fluid leakage are not allowed. If a leak is found through the oil seals, you need to remove the shock absorber and tighten the reservoir nut with a tightening torque of 6 - 7 kgm. The tightening torque of the nut securing the bipod on the shaft should be in the range from 25 to 30 kgm. Check the attachment of the intake pipe of the muffler and muffler to the frame. The passage of gases at the joints is not allowed. Check the fastening of the front, rear and additional springs, the cab to the frame. The leaf springs should not have cracks and breaks, the fastening of the clamps, the ladders of the springs should be reliable. The nuts of the ladders are tightened evenly with a tightening torque of up to 25 - 30 kgm and a tightening torque of the detachable ears of 5 - 10 kgm. Rubber buffers for limiting the travel of the springs and their gaskets must not be damaged or loose. Make sure that the brackets, gaskets, bolts and nuts for securing the cab to the frame are in good condition.

ETO During daily maintenance it is necessary to wash the frame and other assemblies and parts of the chassis, check the condition of the springs and shock absorbers. TO-1 Fastening work. They check the reliability of the fastening of the cargo platform to the frame, using light hammer blows on the rivets. All bolted connections must be fully tightened. When checking the rear wheel mountings, first loosen the outer wheel mounting nut, tighten the inner wheel mounting nuts, and then tighten the outer wheel mounting nuts. When checking the fastening of the shock absorbers of the front suspension and their brackets, the condition of the rubber bushings of the shock absorbers, and fluid leakage are checked. There should be no cracks, dents, or backlash of the shock absorber eyes on the fingers. If fluid leaks through the oil seals, it is necessary to tighten the reservoir nut from the tightening torque to 6 - 7 kg. The wheels must be securely fastened, there should be no knocks and squeaks when the wheel is swinging. Control and adjustment work. Hang up the front wheels, check the ease of rotation of the wheels and play in the bearings with a sharp swing of the wheels. There should be no axial play of the front wheels. Otherwise, unscrew the bolts securing the hub cover 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 the lock washer, tighten the adjusting nut, turning the wheel until tight rotation for correct placement of the rollers in the bearings, unscrew half a turn and check the wheel rotation. After adjustment, the wheel should rotate freely without noticeable play in bearings. After that, the lock ring and the lock washer are installed so that its protrusion enters one of the holes of the lock ring. Turn the lock nut until it stops, bend the lock washer onto the lock nut, put and fix the hub cover and lower the front wheels. On the way, they finally check the adjustment of the bearings for heating the wheel hub. TO-2 Fastening work. Check the attachment of the fenders, cladding, brackets, footboards to the brackets, brackets to the car frame. No squeaking or rattling should be heard when the parts to be tested are shaken sharply. Loose connections are tightened with wrenches. Check the tightness of the nuts of the front and rear wheels of the vehicle, the latch of the spare wheel bracket, bumper, tow hooks and brackets. When checking the rear wheel attachment, first loosen the outer wheel attachment nuts, tighten the inner wheel attachment nuts, and then tighten the outer wheel attachment nuts. All bolted connections must be fully tightened. There should be no loosening of the fastening of the fuel tank, platform mudguards, hood. Check the engine mount on the front and rear supports, the jet thrust mount by removing the engine mudguards. If the fastening is loosened, it is unpinned, the nuts of the front supports are tightened with a tightening torque of up to 8-10 kgm, the rear support with a tightening torque of up to 20-25 kgm, and the cotter pins are again fastened. The tension by the threaded joints of the reactive thrust fastening must ensure the damping 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 nuts of the shock absorber mounting fingers on the front axle beam and on the frame bracket must be fully tightened; destruction of the shock absorber rubber bushings and fluid leakage are not allowed. If a leak is found through the oil seals, you need to remove the shock absorber and tighten the reservoir nut with a tightening torque of 6 - 7 kgm. The tightening torque of the nut securing the bipod on the shaft should be in the range from 25 to 30 kgm. Check the attachment of the intake pipe of the muffler and muffler to the frame. The passage of gases at the joints is not allowed. Check the fastening of the front, rear and additional springs, the cab to the frame. The leaf springs should not have cracks and breaks, the fastening of the clamps, the ladders of the springs should be reliable. The nuts of the ladders are tightened evenly with a tightening torque of up to 25 - 30 kgm and a tightening torque of the detachable ears of 5 - 10 kgm. Rubber buffers for limiting the travel of the springs and their gaskets must not be damaged or loose. Make sure that the brackets, gaskets, bolts and nuts for securing the cab to the frame are in good condition.

Introduction

Diagnostics of the driving axles GAZ-3307

Maintenance of driving axles GAZ-3307

The main malfunctions of the GAZ-3307 drive axles

Repair of driving axles GAZ-3307

Safety requirements. For maintenance and repair of cars

Bibliography

Introduction

GAZ-3307 and GAZ-3309 - Russian trucks in the family of the fourth generation of medium tonnage trucks produced by the Gorky Automobile Plant. The GAZ-3307 onboard carburetor truck has been mass-produced since the end of 1989, and the GAZ-3309 turbodiesel truck has been in production since mid-1994. GAZ-3307 replaced the third-generation GAZ-52/53 family, which it completely displaced from the assembly line by the beginning of 1993. Trucks GAZ-3307 and GAZ-3309 with a carrying capacity of 4.5 tons are intended 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 a 5-ton diesel truck GAZ-4301 (1984-1994) and a 3-ton diesel truck GAZ-3306 (1993-1995). Since 1999, a 2-ton and 2.3-ton off-road truck GAZ-3308 "Sadko" (4x4) has been produced, and since 2005, a 4-ton off-road truck GAZ-33086 "Zemlyak".

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

• Engine
• model ZMZ-5231.10
• description:

V-shaped, 8-cylinder, 4-stroke liquid-cooled gasoline engine, with a carburetor power supply system and an exhaust gas recirculation system (SROG), 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, kgfm (Nm) / 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"

Driving axle of the car is called a unit designed to increase the torque in the cardan, the distribution of this moment, as well as the transmission of its leading wheel axle, which increases the tractive effort of the wheels. The increase in torque and its supply at an angle of 90 ° is provided by the main gear; the torque is distributed between the drive axles of the wheels using a differential, and is transmitted to the drive wheels by the axle shafts.

The device and principle of operation of the driving axles GAZ-3307

The device and principle of operation of the driving axles GAZ-3307

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

The device of the gearbox and hubs of the rear axle of GAZ-3307 cars.

Rear axle reducer GAZ-3307,

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