Symbols of switches and control indicators MAZ 5340M4, 5550M4, 6312M4 (Mercedes, Euro-6).

The cars are equipped with a speedometer, an instrument cluster, a two-needle pressure indicator, blocks of control and warning lamps, signaling devices that indicate to the driver an extreme condition in a particular system, a set of sensors, switches and switches.

The instrument cluster (Fig. 1) includes indicators: fuel level, coolant temperature, engine oil pressure, voltage (voltmeter).

In addition, the combination includes indicators for coolant overheating, low (emergency) engine oil pressure and fuel reserve.

The connection diagram of the instrument cluster with sensors is shown in Fig. 2.

Each combination device consists of a plastic block 5 (see Fig. 1), carrying windings W1, W2, W3,

Between the windings there is an axis on which a permanent magnet and the pointer of the device are mounted. A permanent magnet 6 is pressed into one corner of the block.

In the absence of current in the circuit, the fields of these two magnets interact and place the arrow in the extreme left position.

When the current is turned on, the latter passes in series through the windings W2 and W3 and the temperature compensation resistance Rtk, which serves to stabilize the readings of the device when its temperature changes.

At the same time, current passes through winding W1 and resistance R of the sensor.

The resistance of the sensor changes: for the oil pressure and fuel level sensor by changing the position of the rheostat slider, for the temperature indicator sensor by changing the resistance of the thermistor itself.

When the sensor resistance changes, the current in winding W1 changes. Since the current in the windings and W3 does not change its value, the position of the device needle depends on the interaction of the fields and windings W2 and W3 with the field of the winding W1, which changes its value.

The resulting field of all coils sets the pointer disk magnet to the appropriate position.

Two pressure indicators installed in the UK168 indicator work in a similar way and show the air pressure in the brake system circuits.

The speedometer, made in the same style as the instrument cluster, works in conjunction with a sensor installed on the gearbox (Fig. 3).

A three-way worm wheel 3 is mounted on the secondary shaft of the gearbox, which engages with a driven worm wheel 4, which is integral with the roller.

A spur gear 1 is mounted on the shaft shank, which meshes with gear 5 of the speedometer sensor drive.

Explanation of the right side of the shield

To the right are indicator lamps on the MAZ panel, reflecting:

• Pressure drop in brake circuits;
• Battery charge level;
• Reduced oil pressure in the engine;
• Insufficient coolant level;
• Turning on the cross-axle differential lock;
• Oil filter contamination;
• Conditions of ABS on the trailer;
• Functioning of EDC;
• Starting glow plugs;
• The oil level reaches the emergency mark;
• Diagnostic mode of PBS and ABS;
• ABS control;
• Air filter contamination;
• Fluid level in the power steering system;
• Emergency temperature increase in the cooling motor system.

Decoding the MAZ Zubrenok dashboard lamps also includes the values ​​displayed on the right side of the panel. Here are the switches for the fan in the cabin, light, differential lock and engine illumination.

On the same part there are switches for the rear fog lamp, heated mirrors, ABS, TEMPOSET, and PBS operating modes.

Below there is a rheostat for the instrument lighting, a key for turning on the alarm, a battery switch and a thermostat that controls the heater (if such a unit is installed).

MAZ warning lamps, as well as instrument panels, are easy to find in the catalog. We guarantee fast delivery, affordable prices and the best quality spare parts.

Source

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Chassis (suspension, brakes, steering)

The model has an integral steering mechanism equipped with a hydraulic booster - this significantly simplifies vehicle control. The rear suspension of the model is pneumatic, while the front has small-leaf parabolic springs.

The truck is equipped with separate brakes for the front and rear wheels. Braking efficiency is also ensured by a number of electronic systems, including ABS. In addition to the main brakes, the truck is equipped with parking, spare and auxiliary brakes.

The model has a reinforced suspension, thanks to which the MAZ-5440 can be used in difficult road conditions.

MAZ-551608 • Steering unit

For example, if you need to replace the seat springs in the driver's cabin, it is recommended to dismantle the seat using a set of keys and screwdrivers and install a new mechanism. MAZ-5440 A8, A9, 19 and E9 are the most successful and sought-after representatives of the family of two-axle long-haul tractors, equipped with YaMZ engines with a capacity of 400 hp.

Cabin MAZ-5440

The machine is equipped with two types of cabins – short and long. The second is equipped with sleeping places and is installed on trucks for transporting goods over long distances. However, both the short and long cabs boast spaciousness.

The interior of the cabin space has a plastic design in dark gray tones, the seats and some upholstery elements are made of fabric that is pleasant to the touch. The driver and passenger seats are equipped with springs, which makes the seating comfortable and allows you to spend a long time driving the truck without fatigue. The seats are adjustable in height, reach and tilt.

The vehicle is equipped as standard with:

• three-point seat belts;
• autonomous interior heater;
• pre-heater of the power unit;
• digital tachograph;
• cruise control system.

For a surcharge, the following is installed on the car:

• air conditioner;
• ABS system;
• independent air heater;
• radio

The cabin of the MAZ-5440 truck has high build quality, pleasant design and high passive safety indicators - the panels have rounded edges. The interior is ergonomic - in addition to high-quality design materials and excellent assembly, the placement of vehicle controls and additional equipment is also thought out. Separately, it is worth mentioning the dashboard - the instrument readings are perfectly readable even in the daytime, and the backlight is moderately bright and does not blind the driver.

Attention! Thanks to its stylish appearance, cozy, functional and ergonomic cabin, the car is popular in the CIS countries and Europe.

Possible malfunctions of devices and ways to eliminate them

— Cause of malfunction

Remedy

Fuel level, oil pressure and temperature gauges do not work

Voltage indicator works

Fuse No. 8 burned out

Replace fuse

Voltage indicator does not work

Fuse No. 6 burned out

Replace fuse

Control or warning lamps in the blocks do not light up

Fuse No. 8 burned out

Replace fuse

The corresponding lamps in the block have burned out

replace lamps

The current-carrying path on the unit board has burned out

Inspect and fix the block

Underestimated or overestimated instrument readings (pressure, temperature and fuel gauges)

The corresponding sensor is faulty

Replace sensor

The device is faulty

Replace the device

The indicators for coolant overheating, fuel reserve or low oil pressure do not light up

The corresponding sensor has failed

Replace sensor

Design and modifications

The appearance of the Belarusian truck tractor corresponds to modern automotive fashion: stylish aerodynamic body kits and linings, a wing on the roof, new modern head optics, a modernized radiator grille, and an eye-pleasing color scheme. However, the truck retained its recognizable features.

Separately, it is worth highlighting the MAZ-5440M9 modification. The modification has been produced since 2022, and has a fundamentally new cabin design - in the front part there is head optics in the form of lensed lights. In the center there is a massive black radiator grille with a silver MAZ inscription, and under it there is a logo with the image of a bison - a new recognizable sign of the Minsk Automobile Plant. A little lower, under the air intake grille, there is a step, thanks to which the driver can easily care for the massive windshield.

Malfunctions

The car is unpretentious, stylish and reliable. However, it is not without its shortcomings. So, according to reviews from drivers, almost immediately after purchasing and starting to use the car, the frame, cabin, and bumper become covered with rust, so it is recommended to tint the car. In addition, the headlights cause criticism. After a year of driving a car, they practically stop shining - the lensed optics burn out and require replacement.

Due to the fact that a number of models are equipped with foreign-made engines, transmissions, and chassis elements, as a rule, these components are practically “indestructible.”

Attention! When driving a MAZ-5440, the rear axle shock absorbers, front suspension stabilizer bushings and rear gearbox seals must be replaced.

The cost of a new truck, depending on the configuration and equipment, is from 3 to 4 million rubles. Trucks produced before 2008 will cost slightly less - depending on the technical condition, equipment, appearance and mileage, such a car can be purchased in the range from 700 thousand to 1.5 million rubles. Rebuilt 2008 models with mileage will cost drivers between 1.5 and 2 million rubles.

The MAZ-5440 truck is popular not only in its homeland in the Republic of Belarus, but in other countries - Russia, Ukraine, the Baltic states and European countries. This is due to the attractive appearance of the vehicle, a comfortable cabin, reliability and low price of the truck. The machine is not without its shortcomings, but it is distinguished by good maintainability and efficiency.

Semi-trailers. Steering

Maintenance

Maintenance of control and measuring instruments comes down to maintaining the instruments and sensors in good condition, for which it is necessary to wipe the instrument scales and sockets of control and signal lamp units with a dry cloth weekly, and also ensure that the protective rubber covers are securely seated on the sensor housings.

Improper fitment of the covers can lead to failure of the plug connection due to moisture and dirt.

Every 30 thousand kilometers during the next maintenance-2, it is necessary to remove the lubricant from the 2nd spur gears and the 5th speedometer (see Fig. 3) and replace it with a new one. CIATIM-201 lubricant is used to lubricate the gears.

Video

Over the years, the MAZ-5516 car was equipped with power plants from the Yaroslavl Motor Plant YaMZ-238, YaMZ-238D, YaMZ-6581 with a capacity of 240, 330 and 400 horsepower, respectively. FROM 4 20 379224 Clamp 1 23 379002 Feed nipple 2 24 401503 Elbow 1 25 379166 Clamp 3 26 201456 Bolt М8-6gх20 2 27 201458 Bolt М8-6gх25 1 28 250510 Guy ka M8-6N 3 29 252038 Washer 8 3 30 252135 Washer 8T 3 31 401879 Clamp 1 32 374614 Nut М12х1.5-5Н6Н 1 33 375818 Washer 12 1 35 010-14-2-2 Ring 1 36 64221-1104514-01 Rotary square 2 37 64221-110451 7-01 Rotary tee 2 38 64221-1104510 Fuel line 2.

Dimensions

Rated crankshaft rotation speed 2100 rpm Torque 1785 Nm Idle speed 2300 rpm Gearbox model YaMZ-239 Number of gears 9 Gear ratio 5.49 Type of coupling mechanism Disc Steering mechanism Pneumatic power steering Interwheel lock Yes Interaxle blocker Yes Transport tire pressure 6 kgf cm2 Gearbox type Mechanical Weight 33000 kg Sleeping place Yes Average fuel consumption 32 l per 100 km Wheel type Pneumatic Load platform area 11 cm2 Engine displacement 11.2 l Type of fuel used Diesel Maximum speed 80 km h. With the correct adjustment of the driver's seat, excellent visibility is achieved; a large glass area, thin frames, rear-view mirrors with electrically adjustable position and a loading ramp viewing mirror make it possible to view the road in front and have an excellent view of the space on the sides of the car.

Engine and gearbox

Depending on the modification, the machine is equipped with the following types of diesel power units:

1. MAZ-544004 is equipped with an 8-cylinder power unit YaMZ-238DE. The engine displacement is 14.86 liters and the power is 330 horsepower. The engine complies with the Euro-2 environmental safety class;
2. Modifications of MAZ-544008/-5440A8 are equipped with 8-cylinder V-shaped diesel engines YaMZ-7511.10 (compliance with the Euro-2 environmental safety class) and YaMZ-6581.10 (compliance with the Euro-3 environmental safety class), both engines have a power of 400 horsepower ;
3. The MAZ-5440A9/-5440B9 is equipped with a 6-cylinder in-line power unit YaMZ-650.10. The engine capacity is 11.12 liters and the power is 412 horsepower. The motor complies with Euro-3 class;
4. MAZ-5440V3 and 5440V5 are equipped with 6-cylinder, 6.65-liter YaMZ-5361.10 and YaMZ-536.10 engines. Both engines comply with the Euro 4 standard. The first engine has a power of 270 horsepower, the second - 312 “horses”, respectively;
5. MAZ-544087 and 5440W8 are equipped with foreign-made 8.9-liter, inline 6-cylinder Cummins ISLe 375-30 (Euro-3) and Cummins ISLe 400-40 (Euro-4) engines. The first engine has a power of 375 hp, the second – 400 hp. Both engines have a displacement of 8.9 liters;
6. MAZ-544019/-5440E9/-544018 are equipped with an 11.95-liter 6-cylinder V-shaped engine OM 501LA. The engine, depending on the modification, complies with Euro-4 or Euro-5 standards. Engine power 435 horsepower;
7. MAZ-5440M9 is equipped with a German Mercedes-Benz OM471 engine with a power of 475 hp.

Attention! All engines installed on the Belarusian truck tractor are equipped with a turbocharging system, common rail injection, intercooler and liquid cooling.

As for the transmission, depending on the modification of the car, 8,9,12, and 16-speed gearboxes of both foreign and domestic production are used.