The BelAZ-7555 mining dump truck has a payload capacity of 55 tons. Its purpose is to transport masses of soil and ore during the development of various mineral deposits in the open pit, in deep quarries. Can be used in the construction of large industrial, road transport and hydraulic facilities. The vehicle is adapted for operation on technical roads, in the widest range of natural and climatic conditions, in the temperature range from -50 to +50 degrees.
Specifications
BelAZ-7555 - technical characteristics of the unit:
| Maximum load capacity | 55,000 kg |
| Power unit model | YaMZ-845.10 |
| Engine power | 730 horsepower |
| Tire size | 24.00-35 |
| Highest speed | 55 km/h |
| Overall turning radius | 55 m |
| Working body volume | 6 m³ |
| Maximum rear axle load | 35,000 kg |
| Number of gears | 6 |
| Reverse | Eat |
| Specific fuel consumption | 216 g/kWh |
| Stroke of the piston part of the suspension mechanism cylinder | 30 cm |
| Permissible front axle load | 20,000 kg |
| Number of seats in the cabin | 1 |
| Diameter of cylindrical elements | 30 cm |
| Brake type | Dry, friction |
| Wheel mechanism | Pneumatic |
| Full mass | 95,500 kg |
| Dimensions | Length - 8,890 mm Width - 5,240 mm Height - 4,610 mm |
| Weight | 40,500 kg |
| Hanging mechanism | Independent type, equipped with shock absorbers |
| Maximum torque | 3000 Nm |
| Engine speed | 1400 rpm |
| Nominal battery voltage | 24 V |
7555B
Technical parameters of modification 7555B:
| Vehicle weight without load | 40,200 kg |
| Full mass | 95,200 kg |
| Maximum lifting weight | 55,000 kg |
| Load on the front drive axle | 20,500 kg |
| Rear Cart Load | 19,700 kg |
| Wheelbase | 4,000 mm |
| Front wheel track | 3,700 mm |
| Rear wheel track | 3,730 mm |
| Largest overall turning radius | 9,000 mm |
| Travel speed | 55 km/h |
| Fuel tank volume | 230 l |
| Type of fuel used | Diesel |
| Rear axle lubricant container | 108 l |
| Liquid cooling system volume | 205 l |
| Lifting the loading platform | 15 s |
| Lowering the platform | 14 s |
| System pressure | 17 MPa |
| Filtration degree | 10 µm |
| Number of cylinders | 6 |
| Engine displacement | 18.9 l |
| Power unit power | 710 horsepower |
| Torque | 2731 Nm |
| Crankshaft speed | 1400 rpm |
| Cylinder diameter | 15.9 cm |
| Piston stroke | 15.9 cm |
| Fuel consumption | 209 g/kWh |
| Engine starting system | Electric starter |
| Steering angle | 41° |
| Dimensions | 8.89*4.74*4.56 m |
7555D
Parameters and indicators of model 7555D:
| Motor model | Cummins KTTA 19-C |
| Power | 710 horsepower |
| Maximum torque | 2731 Nm |
| Number of gears | 6 |
| Reverse | Eat |
| Gearbox type | Automatic |
| Body volume | 50 m³ |
| Vehicle curb weight | 41,500 kg |
| Weight of the vehicle including cargo | 96,500 kg |
| Load capacity | 55,000 kg |
| Length | 8.89 m |
| Width | 5.08 m |
| Height | 4.63 m |
| Wheel formula | 4*2 |
| Brakes | Single disc, dry |
| Hanging mechanism type | Pneumohydraulic |
| Tire size | 24.00-R35 |
| Highest speed | 55 km/h |
| Specific diesel fuel consumption | 209 g/kWh |
| Hydraulic front wheel drive | Eat |
| Overall turning radius | 9 m |
| Parking brake type | Shoe |
| Engine speed | 2340 rpm |
| Number of cylinders | 6 |
| Diameter of cylindrical elements | 16 cm |
| Piston stroke | 16 cm |
| Number of seats | 1 |
| Material from which the support frame is made | Steel |
| Wheelbase | 4,000 mm |
| Battery voltage | 24 V |
| Number of batteries | 2 |
Other modifications
Technical characteristics and modification indicators 7555E:
| Vehicle weight without load | 44,000 kg |
| Full mass | 104,000 kg |
| Maximum lifting weight | 60,000 kg |
| Load on the front drive axle | 22,300 kg |
| Rear Cart Load | 21,700 kg |
| Wheelbase | 4,000 mm |
| Front wheel track | 3.7 m |
| Rear wheel track | 3.7 m |
| Largest overall turning radius | 9,000 mm |
| Travel speed | 55 km/h |
| Fuel tank volume | 735 l |
| Type of fuel used | Diesel |
| Rear axle lubricant container | 108 l |
| Liquid cooling system volume | 210 l |
| Lifting the loading platform | 16 s |
| Lowering the platform | 15 s |
| System pressure | 18 MPa |
| Filtration degree | 11 µm |
| Number of cylinders | 6 |
| Engine displacement | 19 l |
| Power unit power | 715 horsepower |
| Torque | 2700 Nm |
| Crankshaft speed | 2325 rpm |
| Cylinder diameter | 16 cm |
| Piston stroke | 16 cm |
| Fuel consumption | 175 l per 100 km |
| Engine starting system | Electric starter |
| Dimensions | 8.89*5.3*3.63 m |
Varieties and modifications
Today, the Belarusian Automobile Plant produces as many as four modifications of the “quarry” in question . They are all marked as follows:
- 7555B,
- 7555D,
- 7555E,
- 7555F.
They differ from each other only in the body design and some minor parameters, as well as the installed engines.
Modifications labeled as 7555B and 7555D are equipped with Cummins KTTA 19-C engines. The 7555E and 7555F modifications are equipped with Cummins QCK 19-C engines.
Engine
A Chinese-made diesel engine from Cummins Corporation - with an electronic control system and a central impeller of the cooling system. This ensures optimal specific power, speed of the dump truck on climbs, as well as fuel efficiency.
To facilitate engine starting in conditions of extremely low temperatures, BelAZ-7555V mining dump trucks are equipped with pre-heaters for engine coolant and diesel fuel. This makes it easier to start and guarantees stable operation in the harsh climatic conditions of the Far North, Siberia and the Far East.
The BelAZ-7555V engine brand is Cummins KTTA 19-C. This is a diesel, four-stroke, in-line cylinder engine, with direct fuel injection, gas turbine supercharging and charge air cooling. It has the following technical parameters: total weight – 1,975 kg; maximum power – 522 kW; working volume of the combustion chamber – 19,000 cm3; total number of working cylinders – 6 pcs.; the cylinders are arranged in a row; There is a turbocharger (double).
- Number of cylinders – 6.
- The working volume of the cylinders is 18.9 liters.
- Rated power (at 2100 rpm) -522 kW, or 710 horsepower.
- Maximum torque (at 1400 rpm) – 2731 N.m.
- Cylinder diameter – 159 mm; piston stroke – 159 mm.
- Specific fuel consumption at rated power is 209 g/kW h.
- The minimum stable crankshaft rotation speed in idle mode is 750 rpm.
- The maximum crankshaft rotation speed in idle mode is 2325 rpm.
Air purification for the motor is carried out by a three-stage filter with dry-type active elements. The lubrication system is mixed, based on the “wet sump” principle. The cooling system is liquid, with forced circulation, and is combined with a hydromechanical transmission cooling system. The hydromechanical transmission oil is cooled by a water-oil heat exchanger. The starting system is electric starter. The voltage in the electrical system is 24 Volts.
Purpose
Belaz-7555 is a vehicle used for transporting crushed rock, as well as bulk materials in off-road conditions. Often used in the construction of industrial/hydraulic facilities, road construction, and tasks in the processing industry.
Important
When choosing a quarry vehicle for work, it is necessary to take into account its type, design features and load capacity, on which the possibility of application in solving certain problems depends.
To increase efficiency and productivity, it is recommended to use such trucks in conjunction with excavators/loaders having buckets with a capacity of 8 to 12.5 cubic meters, reducing loading time.
Transmission
BelAZ-7555V is equipped with a hydromechanical transmission with six automatic forward gears and one reverse gear. It allows you to select the most optimal traction and speed mode of the dump truck to facilitate vehicle control and ensure the necessary traffic safety.
The BelAZ-7555V hydromechanical transmission consists of the following main components: torque converter; four-shaft gearbox with friction clutches; microprocessor system (for protection against overloads and control of mechanisms); emergency control system. The gear shift control drive is electrohydraulic. The retarder brake is hydrodynamic, blade type.
An integrated four-wheel torque converter with automatic locking helps reduce dynamic loads in the transmission, ensuring stability and stable engine operation when these loads change.
The GMP automatic control system (GMP ACS) improves the operational characteristics of a mining dump truck, increases service life and reliability by maintaining optimal operating conditions.
Load capacity
Depending on the specific modification, the carrying capacity of BELAZ-7555 is 55 or 60 tons. The 55-ton BELAZ-7555 models are equipped with a bucket-type body with a volume of 22.7 cubic meters. m, 60-ton - 27 cc. All of them are equipped with ROPS protection systems. There is a bottom heating function.
Photo source: belaz.by The BELAZ-7555 device allows it to be operated at temperatures from -50 to +50 degrees
Brake control
Despite the fact that the transmission is automatic, there are three pedals in the cabin. The third pedal is not a clutch, but an additional brake. Although it can be called the main one. The standard front wheel disc brake system (middle pedal) is used primarily on level surfaces and with an empty body. But when the BelAZ has a load of over 50 tons in the back and it is driving down a slope, conventional brakes will not be enough. Not only will they not completely stop the car going down the mountain, but also the friction of the pads on the discs can lead to a fire.
Therefore, the leftmost pedal regulates the multi-disc oil-cooled brakes of the rear wheels. Since the brake discs are in cooled oil, they do not overheat. Multi-disc brake mechanisms increase the average technical speed by 10...20% when driving on slopes due to the increased efficiency of the MMOT and forced cooling system; increase reliability and traffic safety.
The brake system of the BelAZ-7555V complies with international safety standards “STB ISO 3450”. It is equipped with working, parking, auxiliary and spare brake systems. The working system includes dry single-disc brakes for the front and rear wheels. The drive is hydraulic, separate for the front and rear wheels. In the parking system there is a shoe brake mechanism of a permanently closed type on the drive shaft of the main gear. Drive - spring, hydraulic control.
The auxiliary system is a hydrodynamic brake-retarder on the drive shaft of the gearbox, with an accelerated response time, control is electrohydraulic. The backup system uses the parking and service brake circuits.
Weight and dimensions parameters
Modifications of BelAZ-7555 under the symbol B, E and F have identical overall parameters:
- length from the front bumper to the rear of the loading platform – 8,890 mm;
- width from the extreme part of the left wheel tread to the extreme part of the right wheel tread – 4,740 mm;
- height from the road surface to the top of the cabin – 4,560 mm.
Such impressive dimensions are primarily due to the large load capacity, which is as much as 55 tons for all models, excluding the E modification, since this model can transport 60 tons.
The overall dimensions of modification D are slightly different:
- length – 8,890 mm;
- width – 5,080 mm;
- height 4,630 mm.
Models coded B and F have a dry operating weight without refueling tanks and cargo of 40,500 kg.
Modification D is slightly heavier – 41,500 kg. And the most massive is modification E - 44,100 kg.
Such size and weight parameters do not prevent this mining truck from moving at a relatively high speed - 55 km/h.
Important! The geometric volume of the BelAZ-7555F body is 50 m3, as it differs from its counterparts in its unique design. For other models, this parameter is less outstanding - it is approximately 23 m3. With a cap, the geometric volume increases to 33.3 m3.
Steering
The design of the hydrostatic drive ensures reliable operation of the steering and eliminates mechanical feedback. The steering column is distinguished by the ability to adjust the angle and height, low force on the steering wheel, ergonomic, injury-proof, convenient control, and guarantees the driver a decent level of comfort. The high maneuverability of BelAZ-7555V dump trucks is supported by a small turning radius in combination with their short wheelbase.
The front wheels are steered. The steering angle of the steering wheels is 41 degrees. The turning radius is 9 meters. The overall turning diameter is 20.5 meters. The steering of the BelAZ-7555V complies with the requirements of the international standard ISO-5010.
Prices and analogues
Rental and purchase costs:
| A | B | D | E | |
| Purchase, rub. | 2 100 000 | 3 000 000 | 3 400 000 | 4 000 000 |
| Rent, rub./shift | 16 000 | 20 000 | 22 000 | 27 000 |
Analogs: BelAZ-540A, model 7547 and 7545.
Quarry dump trucks are designed to transport rock mass in a loosened state along technological roads in open-pit mining operations with different climatic conditions. They can be used in the construction of large industrial and hydraulic structures, in the construction of highway complexes, as well as in technological departments of processing industry enterprises. Depending on the specific weight of the cargo being transported, the greatest efficiency is achieved when operating with excavators or loaders with buckets of the following capacity: 8 - 12.5 m3.
Suspension and chassis
The BelAZ-7555V dump truck is equipped with a pneumohydraulic type suspension with a built-in hydraulic shock absorber. In combination with the dependent guide vane system, this ensures high smoothness, productivity, technical speed, stability against lateral rolls, durability of the dump truck components and comfortable working conditions for the driver. Independent for the front axle and drive axle, the suspension is equipped with trailing arms, central joints and transverse bars.
Two pneumohydraulic cylinders are provided for each front axle and rear axle (oil and nitrogen). The cylinder piston stroke is – front 300 mm; rear – 270 mm. BelAZ-7555V is equipped with a rear drive axle, which consists of the following main components: single-stage bevel gear; bevel differential with four pinions; wheel-type planetary gears with spur gears; cardan transmission. The cardan transmission consists of cardan shafts (open type); bearings (needle type); protective fence; elastic coupling.
Two open-type cardan shafts with hinges on needle bearings connect the hydromechanical transmission to the engine and drive axle. An elastic coupling is installed between the front driveshaft and the diesel engine. A protective guard is provided for the front propeller shaft. Gear ratios: main gear – 2.73; wheel drive - 7.62; total drive axle – 20.8.
The front axle is not driven, steered, and has a box section. Wheels are discless, with side, lock and seat rings. The tires on the BelAZ-7555V are tubeless, pneumatic, with a special quarry tread pattern. Their size is 24.00R35, designation “24.00-35 HC42/24.00R35”; nominal internal pressure – 0.65 MPa. These tires use a rim size 17.00-35/3.5.
Frame and body of BelAZ-7555V
The truck frame is welded, made of particularly strong low-alloy steel. The longitudinal spars of box-section and variable height are interconnected by cross members. Cast elements are used in areas of maximum load.
The entire frame structure is not of the one-piece type. By welding or bolting, the remaining special sections are attached to its middle base.
The frame itself provides special fastenings for mounting auxiliary and main equipment. After making detailed calculations of the correct weight distribution of the car, the engine shield was moved 120 cm forward. The driver's cabin of the BelAZ-7555V, together with the engine compartment, is mounted in the front part, and the body occupies 2/3 of the entire area of the vehicle.
The body of this dump truck is a special quarry (bucket) type. It is equipped with a security system according to international FOPS standards. The body is welded from separate components and is equipped with a powerful protective visor. The center of gravity is carefully calibrated and located in such a way that the dump truck overturning is completely excluded. The body is equipped with a heating system from below using exhaust gases, equipped with a mechanical locking system in the raised position and special stone ejectors.
The capacity of the BelAZ-7555V body is: flush with the sides - 22.7 cubic meters; with a “cap” 2:1 – 33.3 cubic meters; with extension sides - 35.5 cubic meters and more, up to 50 cubic meters. Three warning lights can be seen to the right of the loading platform. They show the degree of loading of the body. From left to right: white light indicates reserve capacity, yellow indicates optimal capacity, red indicates overload.
Hydraulic system
The integrated (for the body tipping mechanism, steering and brake drive) hydraulic system of the BelAZ-7555V is built on standardized elements, has structural simplicity and minimal power losses. Provides the necessary oil cooling without using a radiator in the design.
The main working parts of the hydraulic equipment of the dump truck are gear-type oil pumps; as well as hydraulic cylinders that directly lift the body. The loading platform lifting cylinders are telescopic, two-stage, with one double-acting stage. Pump brand: NSh-100A3, or NSh-50M-4.
The hydraulic drive system has the following temporary operating parameters: the platform rises to the top point in 15 seconds; the platform is lowered in 14 seconds; the maximum possible pressure in the system created by the pumps is 17 MPa; and the maximum pump performance at 2100 rpm is 342 dm3/min. The degree of filtration is 10 microns.
Standard and additional options
BelAZ-7555V is equipped with a set of various options and specialized systems:
- Fire extinguishing system; heating and air conditioning unit - standard;
- Engine preheating device; centralized lubrication system; additional heater in the cabin; indicators of body loading and fuel quantity; indicators that record tire pressure in real time; diagnostic system that determines the cause of the malfunction; Underbody lining – additional options.
Device
The BelAZ 7555 welded frame is made of low-alloy grade. The cross members are connected by longitudinal spars of variable height. At high load points, cast elements are used, but the entire frame is not solid. The special sections are attached to the middle base by bolting and welding. The frame also has additional fastenings for installing equipment. The car body occupies almost 70% of the total area, the cabin and engine compartment are located in the front part. To the right of the platform there are 3 warning lights indicating the loading level. White light indicates reserve capacity, yellow indicates normal loading, red indicates overload.
BelAZ 7555 is equipped with a pneumatic-hydraulic suspension with hydraulic shock absorbers. Together with the dependent guide vane mechanism, it increases the smoothness and stability of the machine. The dependent front suspension is equipped with trailing arms, transverse bars and central joints. The rear drive axle is represented by a single-stage bevel gear, cardan transmission, planetary gears with gears and a bevel differential. 2 cardan shafts connect the hydromechanical transmission to the unit and the drive axle. The car uses discless wheels with tubeless tires (24.00R35).
The car is driven through a hydromechanical transmission with 6 automatic forward speeds and 1 reverse speed. It consists of a 4-shaft gearbox with friction clutches, an emergency control mechanism, a torque converter and a microprocessor system. Gear shifting is performed using an electrohydraulic control drive.
The BelAZ 7555 uses a combined hydraulic system with standardized elements and a simple design. Oil cooling is performed without the use of a radiator. The hydraulic system is based on gear pumps NSh-100A3 (NSH-50M-4) and hydraulic cylinders that lift the body. The hydraulic drive system allows the platform to be raised in 15 seconds and lowered in 14 seconds.
There are 3 pedals in the BelAZ 7555 cabin, despite the automatic transmission. The third pedal is an additional brake. The middle pedal is used when the weight is unladen and on a flat road. When fully loaded and driving on a slope, the 3rd pedal is activated, regulating the multi-disc brakes on the rear wheels. The brake discs are located in cooled oil and do not overheat.
The BelAZ 7555 cabin complies with European standards. The vibration level does not exceed 8 dB, so the driver does not get tired even during long-term work. The cabin has 2 doors and 2 seats. The driver's air-sprung seat has a range of adjustments, as does the steering column. The cabin complies with ROPS safety requirements and STB EN 474-6 standard. The main panel has a modern screen with a set of light bulbs that duplicates the readings.
Cabin
The driver's cabin is quite comfortable. It fully complies with current European quality standards applicable to heavy equipment of this kind. The level of vibration present in the cabin does not exceed eighty deciBells. The overall vibration level is up to 115 dB. Being in the cabin allows you not to experience fatigue even during very long periods of work.
The fact that the landing here is high is obvious to those who have never dealt with BelAZ. There is a strict rule: climb the stairs to the cabin only facing the machine to avoid falling. There is a special lamp illuminating the stairs - for those cases when work is completed after sunset. It is turned on/off by a button hidden in the front bumper.
The BelAZ-7555V cabin is double and two-door, with an air-sprung adjustable seat for the driver, with an additional, simple hard seat for the passenger, and a steering column with a set of adjustments. The cabin meets the requirements of the ROPS safety system; requirements of the standards “EN 474-1” and “STB EN 474-6”, which establish permissible levels of internal noise, vibration, concentration of harmful substances and dust levels in the air inside the cabin.
The cabin is equipped with sun blinds and a modern display on the main instrument panel, which is a modern display next to a set of light bulbs that duplicate the readings. Here you can see scales of operating pressure in the gearbox, temperature in the cooling system, speed, engine oil pressure, engine heating, and rpm. In the corner there is a special odometer: it shows how many engine hours the car will need scheduled diagnostics.
The handle that is connected to the gas pedal can be called “cruise control”. It also performs the functions of acceleration, stabilization of lifting and lowering of the platform. By the way, the platform itself also has several sensors. One does not allow you to develop high speed when the body is not completely closed. The other makes the “lid” lower automatically if the driver has already started moving and has forgotten about it. There is also a lock button.
Drivers of the BelAZ-7555V in the first years of production complained of a strong impact when lowering the loading platform. The factory listened to this, and now the mechanism operates much smoother and softer - like a door closer, without disturbing the comfort in the cabin.
Refill tanks
The mining truck in question is equipped with a fairly powerful engine with excellent technical characteristics, which is visible not only when disassembling it. As a result, the number of its filling containers is very large:
- tank volume for refueling – 740 l;
- hydraulic tank – 230 l;
- amount of lubricant in the rear axle – 108 l;
- suspension : front cylinders – 15 l (each), rear cylinders – 15.8 l (each);
- transmission – 90 l;
- engine liquid cooling system – 205 l.
The total volume of filling tanks is almost one and a half tons.
Specialized equipment and additional options
BelAZ-7555 is equipped with many different options and specialized systems that make its operation very simple and convenient:
- cabin air conditioning system ;
- a system that extinguishes fire in the driver's cabin ;
- device for engine preheating ;
- centralized lubrication system ;
- load and fuel quantity indicators;
- indicators that record tire pressure in real time;
- diagnostic system , which allows you to quickly determine the cause of a malfunction.
Also, if necessary, the manufacturer can develop any specialized options upon request of the buyer.
Cabin
The operating comfort of the Belaz-7555 is also influenced by the cabin, designed for two people, equipped with a pair of seats.
The interior is quite comfortable, and the front glazing provides good visibility. There is nothing superfluous in the interior, but the ergonomics of the workplace are well thought out. The driver's seat is on adjustable air springs. Structurally, the cabin complies with EN 474-1 and 474-6 standards.
They determine the optimal level of noise, vibration, concentration of harmful components and dust. The sound level is no more than 80 dB. Thanks to the large adjustment possibilities, each driver can adjust the seat to suit himself.
Exploitation
The instruction manual contains the following recommendations:
- During a sudden stop of the engine, you cannot move the hydromechanical transmission control handle to the neutral position until the vehicle comes to a complete stop.
- If the vehicle has stopped on a slope, it is necessary to prevent the vehicle from moving spontaneously and apply the parking brake.
- It is forbidden to leave the cab if the pedal is locked.
- During vehicle maintenance work, the loading platform is raised and secured in this position using special locking cables.
- Do not stay near the dump truck while the platform is being lifted.
- Loading of vehicles is carried out only from the side and rear.
- Unloading areas with soft surfaces must not be used to avoid causing the tipper truck to tip over during unloading.
The operating instructions include the following sections:
- General information about transport.
- Safety measures during vehicle operation and repair.
- A complete description of all the main components and mechanisms of BelAZ.
- Recommendations for running in.
- Maintenance frequency.
- Unloading and installation of the dump truck.
- Rules for storing and transporting BelAZ.
Features and scope of application of BelAZ-7555V
A prototype of a dump truck with a lifting capacity of 55 tons BelAZ-7555V was manufactured in 1994. A few years later, it became the lead model of a new family of dump trucks from Zhodino, equipped with a hydromechanical transmission. This car differs from the BelAZ-7555A in its engine. The BelAZ-7555V is equipped with a Cummins brand power unit, and not a YaMZ one, like the BelAZ-7555A.
Over the past quarter century, this family has been repeatedly modernized and improved. Other new products of similar carrying capacity have appeared from the Belarusian Automobile Plant. But BelAZ-7555V, as one of the most successful models, still firmly occupies its place in the production program of the enterprise and in the range of products.
With the help of this heavy-duty dump truck, extracted ore and soil materials are transported to places of their subsequent final processing. For mining dump trucks of this class, special technological roads with a width of six meters or more are equipped in quarries. Due to the fact that the body volume of the BelAZ-7555 series trucks reaches up to 50 cubic meters, the vehicle is quite productive, capable of working effectively with several small or one large industrial excavator.
With a standard load capacity of 55 tons, in fact, in industrial quarrying these vehicles are regularly loaded with 60 tons or more. In addition to quarries, the BelAZ-7555V is also applicable at any other production facilities where transportation of large volumes of cargo is required. These vehicles are not intended for driving on public roads due to their large weight. The thousands of tons of cargo that the BelAZ-7555V is capable of transporting in one working day at the quarry more than pays for the costs of diesel fuel, maintenance and servicing of this super-heavyweight.
Repair
BelAZ repair manual:
- If there is no oil pressure in the hydraulic line in the system, then it is necessary to conduct an external inspection of the sensor for damage and defects, add oil to the system to the required level, inspect and, if necessary, replace the pump element.
- A low pressure level may be due to a malfunction of the pressure gauge, clogging of the filter parts of the oil intake mechanism, or jamming of the pusher. In this case, it is recommended to inspect all these mechanisms for wear, and if faults are found, replace them with new ones.
- If the oil pressure level increases sharply, the gearbox should be disassembled and the failed elements and sealing rings should be replaced.
- If the gearbox stage does not engage, you need to replace the insert, eliminate the open circuit, and replace the control panel.
- If the vehicle continues to move even when the lever is in the neutral position, you need to make sure that the electric magnet is working properly, disassemble the unit and wash all parts, replace the clutch and check the oil pressure level in the system.
