The gear ratio of the rear axle gearbox is gas 3307. Paz buses with automatic transmission: new cars for modern cities

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Car brand: GAZ;
Vehicle type: cargo;
Country of origin: Russia;
Original/Analogue: Original
Rear axle GAZ 3309 (3309-2400012) Warranty 1 year Used on GAZ-3309 vehicles with ABS We offer you an extended warranty for the product for one year without mileage. You can also purchase rear and front axles for GAZ, PAZ

Details rear axle trucks GAZ-3307, GAZ-3309

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

The device of a reducer and naves of the back bridge 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 ring; 12, 15, 17, 21 - bearings; 13 - 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 receiver tube; 41 - gearbox housing

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

In the crankcase, a clutch of 2 bearings with a drive gear b, a flange 8 and an adapter 7 of the flange, as well as a differential, the body of which consists of the right 25 and left 28 boxes connected by bolts 23, are installed. On the left box, the driven gear 27 is fixed with bolts and nuts.

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

The preload of the drive gear bearings is regulated 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, fixed with bolts.

The preload of the differential bearings is adjusted with nuts 33. The same nuts regulate the lateral clearance in the engagement of the main gear gears.

In the case of the differential gear of the GAZ-3307, 3309 bridge, gears 22 of the axle shafts and four satellites 35 are installed, placed on the spikes of the cross 26.

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

The rear wheel hubs rotate on tapered roller bearings 4 and 5 mounted on the trunnions 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 trunnion.

The adjusting nut is locked with washer 16 and nut 11. C inside The hub is equipped with a cuff 11, which prevents the lubricant from escaping from the hub, and an oil deflector 8 with a sealing ring and a tube to protect the brake linings from oil ingress.

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 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 GAZ-3307, GAZ-3309

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

Loosen rear wheel nuts

Disconnect cardan shaft from the pinion flange adapter (from the pinion flange);

Disconnect the parking brake cables from the equalizer;

Disconnect hoses brake system, take off brake pipes. Disconnect the electrical cables and ABS sensors;

Unscrew the nuts for fastening the stepladders of the springs, remove the stepladders, linings and on the laying of the springs;

Before disassembly, unscrew drain plug and drain the oil.

Disassembly of 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 half shaft flange gaskets;

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

Remove the brake drum with hub assembly;

Press out seal, thrust washer and bearing inner race. The cuff must be replaced if 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 GAZ-3307, 3309 rear axle hub using a puller and a gripper. Bring the gripping paws under the end of the ring and spread it to the stop by screwing the bolt into the axle. Remove the bearing ring by turning the puller screw;

Press out the outer ring of the outer bearing of the hub 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;

Loosen 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 dismantling bolts;

Remove the gearbox gasket;

Turn out the breather;

To remove the worn bushing of the cuff from the crankcase pin, 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 pin.

Disassembly of the rear axle gearbox GAZ-3307, 3309

The disassembly of the gearbox must be carried out in the following order:

Unscrew the plug of the control hole;

Unscrew the plug of the oil receiving tube;

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

Unlock and unscrew the stop adjusting screw;

Remove the sleeve and spring ring from the adjusting screw;

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

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

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

Loosen the nut on the shank of the drive gear;

Unscrew the nut and remove the washer;

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

Remove the front cover, gasket and oil ring;

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

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

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

Dismantling 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, you need to use a puller with liners;

Unscrew the bolts of the differential boxes, separate the boxes, remove the cross, axle gears, support washers, remove the support washers and satellites from the cross.

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

The bearings and gearing of the final drive 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 side clearance in the engagement of the gears of the main gear, which has increased due to wear of the teeth, cannot be reduced by adjustment, as this will lead to a violation of the engagement of the teeth. As a result, noise will increase or tooth breakage may occur.

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

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

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, after tightening the nut, the moment of resistance to rotation of the main gear of the rear axle turns out to be greater than the norm indicated below, it means that the ends of the inner bearing rings and the adjusting ring are worn out.

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 axle drive bearing preload by reducing the thickness of the adjusting ring installed between the inner races 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 ring, outer bearing inner race and adjusting ring. Select an adjusting ring with a smaller thickness.

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

Assemble the coupling in reverse order and tighten the nut. When tightening the nut, it is necessary to turn the drive gear of the GAZ-3309, 3307 final drive gearbox to properly install the rollers in the bearings. Tighten the nut to the torque indicated above, and one of its slots must coincide with the hole for the cotter pin.

You can’t even turn the nut back a little to match the hole for the cotter pin with the slot of the nut, since if it is not tightened enough, the inner ring of the outer bearing may turn, wear the adjusting ring and, as a result, increase the backlash of the drive gear.

Check bearing tightness. 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 check should be carried out with a dynamometer.

To do this, clamp the clutch in a vice, hook the dynamometer hook into 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 resistance torque of the bearings is within the normal range, you need to cotter the nut and install the drive gear assembly into the rear axle housing, otherwise you need to repeat the adjustment.

If at the same time it turns out that the moment of resistance to rotation is less than required, 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.

The use of a gearbox in automobiles, or a device that provides the transmission and transformation of torque, is quite justified and is the standard way to control the rotation of the wheels of a car.

It looks like a rear axle gearbox GAZ 3309

The design of the GAZ-3309 rear axle also provides for the installation of this device. From him good work In many respects depends not only comfortable movement by car, but also traffic safety. Therefore, knowledge of the main points of the design, signs of malfunction and repair methods will greatly help the driver to notice malfunctions in the operation of the gearbox in a timely manner 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 gear device

It consists of the following main parts:

Cast iron crankcase, which is joined to the rear axle crankcase by means of a bolted connection; a paranitic gasket is used to ensure tightness.
Drive gear complete with couplings, bearings and flanges, directly connected to the cardan shaft.
The main gears of the hypoid type transmission, with a deviation from the leading axis by 32 mm.
The differential assembly, which includes cone-type bearings, installed and bolted in the crankcase sockets under the covers, as well as the axle gear with four satellites placed on the spikes of the cross.

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

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 refueling oil is 8.2 liters.
It is recommended to use oil type TSp-14gip or SAE 85W-90 for refueling.
The oil change interval 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, oil must be poured until it overflows.

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

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

Depending on the type and nature of the newly appeared sound changes, it is possible to preliminarily assess and localize possible faults. You can highlight some typical sounds of a faulty gear unit and decide on the repair steps.

View of the rear axle GAZ-3309

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

This is what the rear axle looks like

Lowering the level of lubricant in the crankcase
Incorrect installation of internal contacts in the main gears
Whistling sound Lack of lubrication in the universal joint module
Appearances of noise effect with periodic manifestation
Driven gear loose
Misalignment in the installation of this part

Continuous grinding and crunching
Chips in gear teeth
Bearing failure
Excessive noise when entering a turn
Incorrect operation of the differential module, in particular, satellites
Violation of the installation of clearances in the differential module
Noise at start up

Derivative module life or incorrect clearance setting
Noise that occurs when engine braking is performed
Excessive backlash fluctuations in the bearings of the drive gear or the development of their resource
The presence of foreign particles in the oil
Excessive knocking at start up
Differential module failure
More clearance in the gears

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

The appearance of the rear axle GAZ 3309

It should be noted that before starting overhaul 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 possibility, you need to use a jack to hang out in turn rear wheels and scroll. In case of occurrence characteristic sound 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 deviations without resorting to complete disassembly of the module.

Troubleshooting without disassembling the gearbox

Some deviations from normal operation gearbox 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 structural parts with constant high-quality lubrication.

When replacing, pay attention to the following points:

The condition of the breather, a device that equalizes 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 performance or replacing it with a serviceable one are activities carried out as part of the maintenance of the rear axle.

The tightness of the connection of the crankcase-case of the gearbox and the rear axle; when loosening the fasteners, the bolts must be tightened. The tightening force is 10–12 kGm. If oil continues to leak from this connection, the oil seal, gasket, and mounting bolts must be replaced.

Another module requiring lubrication is the pinion oil seal bore. To check this assembly, it is necessary to disconnect the cardan shaft with the preliminary installation of connecting marks, unscrew the fixing 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 the oil seal must be additionally replaced.

It should be noted that the cardan disconnection must be carried out with the rear of the car hung 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.

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, do not differ conceptually and fundamentally from the GAZ-53 family. All trucks, regardless of modifications, have basically the same transmission. They are built according to the classical scheme - these are rear-wheel drive cars (4 × 2 wheel formula) with a front-mounted engine, a manual gearbox and a conventional dry single-plate clutch. The transmission device of 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); . Gearbox (4-speed manual

Reducer: an easy way to change the 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 just one, but several at once. About what a gearbox is, what gearboxes and for what purposes are used in cars - read in this article.

In nike, onboard (or wheel) gearboxes are very often used. Special mention should be made of each type of gearboxes. Drive axle reducer. This gearbox is necessary to transmit and change the torque from the gearbox (through the cardan shaft) to the wheels. At the same time, the drive axle ensures the rotation of the wheels at different speeds when cornering, on rough 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 the same axle at once - a central one and two side ones), but it has several advantages: ground clearance by reducing the dimensions of the central gearbox; - IN different cars can be used

PAZ buses with automatic transmission: new cars for modern cities

Pavlovsky Bus Factory has been producing its buses since 1952, and for all these sixty years PAZs have been faithfully serving in Russian cities and villages. In recent years, PAZ has taken a course towards modernization and the creation of a 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 mechanical boxes transmissions, as only they are able to provide the necessary dynamic characteristics heavy machines. However, it is a completely different matter - city buses, they are equipped with automatic boxes quite a long time, although in our country it has never been a mass phenomenon. A big step in this direction was made by the Pavlovsk Bus Plant, which since 2007 began to install "machines" on its PAZ-3237 small bus, and in the spring of 2013 presented a completely new model medium city bus PAZ-320412-05 "Vector" with the 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 PAZ medium city buses with automatic transmission began in 2010, today the plant produces only one model, but this bus has already proven itself well

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

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

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, unpin the nut and tighten to 280-400 Nm (28-40 kg/cm). If, after tightening the nut, the moment of resistance to rotation of the main gear of the rear axle turns out to be greater than the norm indicated below, it means that the ends of the inner bearing rings and the adjusting ring are worn out.

In this case, to adjust the bearings, it is necessary to select a thicker ring. 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 axle drive bearing preload by reducing the thickness of the adjusting ring installed between the inner races 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 ring, inner ring of the outer bearing and adjusting ring. Select an adjusting ring with a smaller thickness.

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

ETO With 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 work. Check the reliability of the fastening of the loading platform to the frame, with the help of light hammer blows on the rivet fasteners. All bolted connections must be fully tightened. When checking fasteners rear wheels first loosen the outer wheel nuts, tighten the inner wheel nuts, and then tighten the outer wheel nuts. When checking the fastening of the front suspension shock absorbers and their brackets, check the condition rubber bushings shock absorbers, fluid leakage. There should be no cracks, dents, play of the shock absorber eyes on the fingers. If liquid leaks through the seals, it is necessary to tighten the reservoir nut from the moment of tightening to 6 - 7 kg. The wheels must be securely fastened, there should be no knocks or squeaks when the wheel is rocking. Control and adjustment work. The front wheels are hung out, by a sharp rocking of the wheels they check the ease of rotation of the wheels and the play in the bearings. 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 it rotates tightly to properly place the rollers in the bearings, unscrew it by half a turn and check the rotation of the wheel. After adjustment, the wheel should rotate freely without noticeable play in bearings. After that, install the lock ring and the lock washer so that its protrusion enters one of the holes in the lock ring. Screw the lock nut to the full, bend the lock washer onto the lock nut, put and secure the hub cover and lower the front wheels. On the way, the adjustment of the bearings is finally checked by heating the wheel hub. TO-2 Fixing work. Check the fastening of the wings, cladding, brackets, steps to the brackets, brackets to the car frame. With a sharp swing of the parts being checked, no creaking or rattling should be heard. Loose connections are tightened with wrenches. Check the tightness of the nuts of the front and rear wheels of the car, the latches of the spare wheel bracket, bumper, tow hooks and brackets. When checking the fastening of the rear wheels, first loosen the fastening nuts of the outer wheels, tighten the fastening nuts of the inner wheels, and then tighten the fastening nuts of the outer wheels. All bolted connections must be fully tightened. There must be no loosening fuel tank, platform mudguards, hood. Check the engine mounting on the front and rear supports, mounting jet thrust 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, back support with a tightening torque of up to 20 - 25 kGm and again cottered. Preload threaded connections jet thrust mounts 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 nuts of the shock absorber fastening pins on the front axle beam and on the frame bracket must be fully tightened, the destruction of the rubber bushings of the shock absorbers and the leakage of liquid is not allowed. If a leak is detected through the seals, it is necessary to remove the shock absorber and tighten the tank nut with a tightening torque of up to 6 - 7 kgm. The tightening torque of the bipod fastening nut on the shaft should be in the range from 25 to 30 kgm. Check the fastening of the exhaust pipe of the silencer and the silencer to the frame. The passage of gases at the joints is not allowed. Check the fastening of the front, rear and additional springs, cab to the frame. Leaf springs should not have cracks and kinks, the fastening of clamps, spring ladders must be reliable. Tighten the nuts of the ladders evenly with a tightening torque of up to 25 - 30 kGm and a tightening torque of detachable lugs of 5 - 10 kGm. Rubber buffers for limiting the travel of the 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 running gear, check the condition of the springs and shock absorbers. TO-1 Fixing work. Check the reliability of the fastening of the loading platform to the frame, with the help of light hammer blows on the rivet fasteners. All bolted connections must be fully tightened. When checking the rear wheel fastenings, first loosen the outer wheel fastening nut, 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, fluid leakage. There should be no cracks, dents, play of the shock absorber eyes on the fingers. If liquid leaks through the seals, it is necessary to tighten the reservoir nut from the moment of tightening to 6 - 7 kg. The wheels must be securely fastened, there should be no knocks or squeaks when the wheel is rocking. Control and adjustment work. The front wheels are hung out, by a sharp rocking of the wheels they check the ease of rotation of the wheels and the play in the bearings. 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 it rotates tightly to properly place the rollers in the bearings, unscrew it by half a turn and check the rotation of the wheel. After adjustment, the wheel should rotate freely without noticeable play in bearings. After that, install the lock ring and the lock washer so that its protrusion enters one of the holes in the lock ring. Screw the lock nut to the full, bend the lock washer onto the lock nut, put and secure the hub cover and lower the front wheels. On the way, the adjustment of the bearings is finally checked by heating the wheel hub. TO-2 Fixing work. Check the fastening of the wings, cladding, brackets, steps to the brackets, brackets to the car frame. With a sharp swing of the parts being checked, no creaking or rattling should be heard. Loose connections are tightened with wrenches. Check the tightness of the nuts of the front and rear wheels of the car, the latches of the spare wheel bracket, bumper, tow hooks and brackets. When checking the fastening of the rear wheels, first loosen the fastening nuts of the outer wheels, tighten the fastening nuts of the inner wheels, and then tighten the fastening nuts of the outer wheels. All bolted connections must be fully tightened. There should be no loosening of the fuel tank, platform mudguards, hood. Check the engine mounting on the front and rear supports, jet thrust mounting 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 again cottered. The tightness of the threaded connections of the fastening of the jet thrust 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 nuts of the shock absorber fastening pins on the front axle beam and on the frame bracket must be fully tightened, the destruction of the rubber bushings of the shock absorbers and the leakage of liquid is not allowed. If a leak is detected through the seals, it is necessary to remove the shock absorber and tighten the tank nut with a tightening torque of up to 6 - 7 kgm. The tightening torque of the bipod fastening nut on the shaft should be in the range from 25 to 30 kgm. Check the fastening of the exhaust pipe of the silencer and the silencer to the frame. The passage of gases at the joints is not allowed. Check the fastening of the front, rear and additional springs, cab to the frame. Leaf springs should not have cracks and kinks, the fastening of clamps, spring ladders must be reliable. Tighten the nuts of the ladders evenly with a tightening torque of up to 25 - 30 kGm and a tightening torque of detachable lugs of 5 - 10 kGm. Rubber buffers for limiting the travel of the 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 drive axles GAZ-3307

TO drive axles GAZ-3307

The main malfunctions of GAZ-3307 drive axles

Repair of drive axles GAZ-3307

Safety requirements. For vehicle maintenance and repair

Bibliography

Introduction

GAZ-3307 And GAZ-3309- Russian trucks in the family of the fourth generation of medium-duty vehicles manufactured 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 since mid-1994. GAZ-3307 replaced the family of the third generation GAZ-52/53, which was completely forced out of the assembly line by the beginning of 1993. Trucks GAZ-3307 and GAZ-3309 with a carrying capacity of 4.5 tons are designed for operation on all types of paved roads and are characterized by high technical and operational performance. 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, 2 and 2.3-ton freight car off-road GAZ-3308 "Sadko" (4x4), and since 2005, a 4-ton off-road truck GAZ-33086 "Countryman".

Specifications carburetor engine truck GAZ-3307 (sample 2008)

Engine
model ZMZ-5231.10
description:

V-shaped, 8-cylinder, 4-stroke Gas engine liquid-cooled, with a carburetor power system and an exhaust gas recirculation system (SROG), OHV valve train, 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"

Vehicle drive axle called a unit designed to increase the torque in the cardan shaft, distribute this moment, and also transfer 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 ° provides the main gear; torque is distributed between the drive axles of the wheels with the help of a differential, and is transmitted to the drive wheels by semi-axes.

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

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

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

Rear axle gearbox GAZ-3307,

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