Power units are designed for operation at ambient temperatures from minus 60 ° C to plus 50 ° C, relative humidity up to 98% at a temperature of 25 ° C, air dusting up to 0.4g / m³, as well as on the movement of the car in the mountain conditions at height Up to 4500m above sea level and overcoming passages up to 4650m above sea level with appropriate reduction in power and economic indicators. Appearance The engine of YAMZ-7511.10 with individual heads of cylinders and a plate liquid-oil radiator (ZMT) is shown in Figure 1, and the comparative indicators of the ENZ-7511 engines are in Table 1.

Fig.1- Power Aggregate YAMZ-7511.10 with individual heads of cylinders

- Model of the engine, developed and assembled OJSC Avtodiesel (Yaroslavl Motor Plant). YAMZ 7511.10 From the family of eight-cylinder V-shaped four-stroke diesel engines, designed to use on the chassis of MZKT-065272, on the MZKT-74181 saddle tractors.

YAMZ 7511.10 is the further development and modernization of eight-cylinder V-shaped engines of the YMZ plant. In fact, YMZ 7511.10 is a forced version of the YMZ-238DE2 engine, which significantly increased power. Distinctive features model Row YAMZ - 7511.10 are a built-in liquid-oil heat exchanger, a new sleeve-piston group with an improved oil cooling system, an increased performance water pump and an improved TNVD. This model of the diesel engine is designed to use the installation of an adequate air that is attached on the frame frame. In addition to excellent specific characteristics and a good power range, this series of engines is reliable in operation, durable, has excellent maintainability and can be operated in extreme environmental conditions at temperatures from -50 to + 50 ° C.

Engines of the Yaroslavl Motor Plant are an acceptable price, high reliability and quality assurance.

Engine YMZ 7511.10 - four-stroke, 8 cylinder, has a V-shaped cylinder arrangement, work volume 14.866cm 3, Cooling Liquid, direct fuel injection, a mechanical rotational speed control, with a turbocharger, complies with environmental emission standards harmful substances Euro-2. Diesel engines YAMZ 7511.10 can be equipped with the clutch of the YAMZ-184 and the gearboxes of YMZ-239, resource overhaul The engine is 10,000 hours.

Maintenance specifications YAMZ-7511.10and his modifications

Modification of the engine YAMZ-7511.10-01 Equipped with TKR-9, HHMT, fan switching clutch, individual block and cylinder head, high performance water pump, high-pressure fuel pump 12/14 and its drive, spinning oscillation pump, front support, generator 6582.3701-03 (2 kW), impeller Fan with a diameter of 660 mm, flywheel for a diaphragm clutch with additional marks and fastening of the flywheel, the clutch of the YAMZ-184, the gearbox YMZ-239. The engine model is operated on the MZKT-65272 chassis.

Modification of the engine YAMZ-7511.10-06 Collected on the basis of NMZ-7511.10-01 and is completed with the clutch of the YAMZ-184-10 with a set of parts of the clutch clutch. This modification of the engine is used on the chassis of MZTK-8021, -80211, on the truck tractors MTK-74181 and cars MAZ-533608, -630308, -631708, -543208, -544008, -642208, -640308, -641708, -630308, and Also comes in spare parts.

Modification of the engine YAMZ-7511.10-10 It is designed on the basis of NMZ-7511.10-06, it is completed with the clutch from MΩ (184.420004), it is used on the C-816-1 milling mosenoper.

Modification of the engine YAMZ-7511.10-11 Collected on the basis of YMZ-7511.10-02, equipped with a flywheel Carter with a stagnant ring, a flywheel with a bearing, an oil level pointer, a nams-184 clutch, a box of YAMZ-239. This modification is applied on the wheel chassis BAZ-690990, -6909902.

Modification of YAMZ-7511.10-12 It has a JMZ-7511.10-02 engine as a base, equipped oil crankcase Without a shell, an oil-level pointer, a right outlet manifold, a fuel plum tube with nozzles with a fitting at an angle of 45 ° to a longitudinal axis of the engine, a fan switching clutch (238nd), the NAMZ-184 clutch, the gearbox of YAMZ-2391-01. The engine does not have turbocharger fastening studs and is used on chassis and dump trucks 8 × 4 Ural-6563.

Modification of YAMZ-7511.10-16 As a base, the YAMZ-75111.10-02 engine is equipped with an oil crankcase without a shell, an oil level pointer is not equipped with a gearbox and clutch. Modification is applied on the KRAZ-7140H1C6 chassis and the KRAZ-6140Te saddle tractor.

________________________________________________________________

Diesel engines trucks and tractors. Spare parts, adjustments and repair.

_______________________________________________________________

Diesel engine YAMZ-7511

The diesel engine of the YAMZ-7511 produced by the Yaroslavl Motor Plant is designed for heavy trucks MAZ and special equipment and has good fuel and economic, efficient and operational characteristics. Ecological motor standard corresponds to Euro-2.

The appearance of the YAMZ-7511.10 diesel engine with individual heads of cylinders and a plate liquid-oil radiator (ZHMT) is shown in Figure 1.

Figure 1 - Silence Aggregate NMZ-7511 with individual heads of cylinders

Specifications of diesel engine YAMZ-7511

Engine type - four-stroke with ignition from compression and turbocharging
The number of cylinders - 8
The location of the cylinders V-shaped, the corner of the collapse - 90 degrees
The order of the cylinders - 1-5-4-2-6-3-7-8
The direction of rotation of the crankshaft is right
Cylinder diameter, mm - 130
Piston move, mm - 140
Working volume, L - 14,86
Compression ratio - 16.5
Rated power, kW (hp) - 294 (400)
Crankshaft rotation rate at rated power, min-1 - 1900
Maximum torque, nm (kgf) - 1715 (175)
Rotation frequency at maximum torque, min-1 - 1100-1300

Idling frequency, min-1:

Maximum - 2150.
- minimum - 600 ± 50

Specific fuel consumption in the speed characteristic, g / kW · h (g / hp):

Minimum - 194 (143)
- at rated power - 215 (158)

Specific oil consumption on avgar% to fuel consumption, no more - 0.2
Method for mixing - direct injection
Camera combustion - unrequited type in piston
The camshaft - common for both series of cylinders, with a gear wheel drive

Thase distribution phases:

Inlet valves - discovery, hail. to VTT - 21.5 / closure, hail. After NMT - 31.5
- Exhaust valves - opening, hail. to VTT - 63 / closure, hail. After NMT - 29.5

The number of valves per cylinder is one intake and one graduation
Thermal gaps of valves on a cold engine, mm - 0.25-0.30

Yamz-7511 diesel engine lubrication system

Type - mixed, with oil cooled in a liquid-oil heat exchanger (HHMT): under pressure lubricated the crankshaft bearings, camshaft, rowing axes, high pressure fuel pump, turbocharger; The remaining rubber surfaces are smeared by splashing.

Oil pump - gear type, single-section

Oil pressure in a heated engine in the mains of the KPA block (kgf / cm2):

At a rated speed of rotation - 400-700 (4-7)
- with a minimum speed of rotation, not less - 100 (1)

Oil filters - Two: Full-current Filter of fine oil treatment (PFTP) with a replaceable filtering element and centrifugal oil cleaner (CM)

Oil cooling system - with a liquid-oil heat exchanger (HHMT), which is installed on the engine, plate or tubular type

The cooling piston cooling system - inkjet cooling nozzles with an oil with a 2,5 mm diameter holes are located on the pipes with the right and left side of the engine with the selection of the oil through the thickness of the choke with a diameter of 6 mm on the engine lubrication system between HMT and PFTA.

Oil pressure start opening valves of lubrication system, kPa (kgf / cm2):

Oil pump reducing valve - 700-800 (7.0-8.0)
- Differential valve - 490-520 (4.9-5.2)
- Oil filter bypass valve - 200-250 (2.0-2.5)
- Opening the Oil Filter Opening Valve Opening Valve - 180-230 (1.8-2.3)
- bypass valve ZHMT 274 ± 25 (2.8 ± 0.25) (only for a plate type ZHMT)

Jamz-7511 engine fuel system

Type - separated type
The high-pressure fuel pump with the regulator and the fuel-pumping pump is eight-section, plunger, spool type plunges.
Model TNVD - 175.1111005-40
The order of the fuel pump sections - 1-3-6-2-4-5-7-8
Rotation frequency regulator - centrifugal, all-life
Fuel pumping pump - piston with manual fuel pumping pump

Nozzles - closed type, with multi-dimensional sprayers: on engines with shared heads - 267.1112010-02 or 204.1112010-50.01 / On the engines with individual heads - 51.1112010-01

The installation angle of fuel injection advance (installed on the labels on the flywheel and the pump of the TNVD):

On engines with shared heads - (6 + 1) degrees
- on the engines with individual heads - (8 + 1) degrees

Fuel filters:

Rough Cleaning - Filter Sustainer
- Thin cleaning - with a replaceable filtering element. On the lid there is a spa fuel valve. Pressure opening valve-gibera 20-40 (0.2-0.4) kPa (kgf / cm2)

Superior - gas turbine system with a single turbocharger with a radial centripetal turbine and centrifugal compressor
Turbocompressor - Model 122 (YAMZ)
Advance (excessive) pressure on nominal mode, kPa (kgf / cm2) - 125 (1.25)

Cooling system of diesel engine YAMZ-7511

Type - liquid, closed type, with forced circulation of coolant.
The cooling system is equipped with a thermostatic device for automatically maintaining the thermal mode of operation of the engine.

Water pump - centrifugal type, with belt drive. The fan is hexless, with a gear drive and a friction clutch on the fan.
Liquid and oil exchanger - plate or tubular type. Equipped with a crane or cork for draining the coolant.
Thermostats - with a solid filler. The opening temperature of the opening 80 S.

Electrical equipment

Type - single-wire diagram. Nominal voltage of 24 V. generator - AC, with a belt twin-acting drive, with a nominal voltage of 28 V.

The generator model is determined by the package. Starting device - Electric Starter mod. 25.3708-21 or 4581 (Slovakia), Nominal Voltage 24 V.
To facilitate the start of the cold engine, an electrofachel device is provided.

additional characteristics

Clutch - YAMZ-184
Gearbox - YAMZ-239

Capacity, l:

Engine lubrication system - 32
- cooling system (without a radiator and expansion tank) - 22

The mass of the non-filled power unit with individual heads of cylinders, kg:

No clutch and gearbox - 1250
- with clutch - 1295
- with clutch and gearbox - 1685

The mass of the non-filled power unit with shared cylinders heads:

No clutch and gearbox - 1215
- with clutch - 1260
- with clutch and gearbox - 1635

YMZ engine 7511 - this is the next generation legendary Motor YAMZ 238, which were produced by the Yaroslavl Motor Plant for vehicle MAZ. The main difference is the presence of turbocharging and increasing environmental norm before Euro-2.

Specifications

YMZ 7511 Motor devices are somewhat different from its predecessors. The designers have improved a number of components and units, which allowed not only to increase the power of the engine, but also the service life. So, the constructive changes suffered:

• A liquid-oil heat exchanger is installed.
• Mounted water pump of increased performance.
• Improved group of piston sleeve with oil cooling system.
• Updating high-pressure fuel pumps.

Now consider the main technical characteristics that the YMZ engine 7511 is:

Service

It is quite simple to serve the YMZ engine 7511, since special differences from the maintenance of the older brother 238 - does not exist. Each planned service maintenance Must be carried out with a frequency of 20,000-25,000 km of run. If you follow the instructions for maintenance and repair, then you must follow the following series of operations:

1. Change of oil.
2. Adjusting the valve mechanism.
3. Replacing filters. So, depending on the modification of the motor, there may be or not to be the following filter elements: a fine and coarse oil filter, a filtering element for coarse and fine fuel purification, air filter, EcoFilter for exhaust.
4. Cleaning nozzles.
5. Adjustments associated with high pressure fuel pump.
6. Other operations aimed at maintenance Power unit.

Repair manual

Move problems from time to time know about yourself to know. Often, it is associated with the wear of the main nodes and aggregates or improper operation. Also, a very important factor can also be considered the maintenance of the motor.

• Malfunctions TNVD associated with poor fuel quality in the CIS.
• Cooling system. This breakdown occurs due to mechanical deposits of nodes.
• Electrical equipment imperfect scheme.
• Wear a piston group.
• Valve mechanism.
• Starter and generator.

The most frequent question that motorists are asked on the Internet - the moment of tightening the head of the cylinder block. For tightening cylinder cylinderings, there is a diagram to be guided.

Tightening should with the power provided by the manufacturer, which is - the nuts of the cylinder head fastening 240-260 (24-26) N · M (kgf · m).

If the fastenings of the GBC are too tightened, then the motor malfunctions are possible, including a breakdown and extrusion of the gasket.

Output

Yamz 7511 engine is a high quality and powerful modern motorWhich during his service proved that worthy of attention. High technical characteristics, power, as well as simplicity in maintenance and repair, made a popular and favorite YMZ engine, both on the territory of Russia and for its adhesions.

The YMZ-7511 engine was produced by the Yaroslavl Motor Plant since 1996. Designed for installation on MAZ cars. The new generation of 8-cylinder diesel engines of the dimension family D x S \u003d 130 x 140 mm - NMZ-7511 and its modifications - with a capacity of 360-420 hp meets the basic technical and economic requirements for modern automotive technology. All models have successfully passed certification tests, which is confirmed by international certificates of compliance with EURO-2 environmental standards. At the same time, design and research works are being conducted to achieve more rigid standards of Euro-3. The promising engines of this family have a wide range of potential consumers, among which the largest manufacturers of cars, main road trains, tractors and other equipment of Russia. Belarus, Ukraine.

Constructive features: Engine installed fuel apparatus Type "Compact-40" with an increased up to 1200 kg / cm injection energy, a fan inclusion coupling, a twist of the crankshaft vibrations, improved the characteristics of intake and exhaust channels. The engine has a built-in liquid-oil heat exchanger, a new cylinder-piston group with a more efficient oil cooling system, an increased productivity water pump, an upgraded oil filtration system, etc. is made under the installation of an upper air-air cooler by car.

Motors YAMZ-7511.10, YMZ-7511.10-06, YAMZ-7512.10 Four-stroke, with compression ignition, with V-shaped cylinders and gas turbine superimposses.

The mass of the not filtered engine is in completeness of delivery, kg:
a) with individual heads of cylinders
No clutch: 1250
with clutch: 1295
a) with general heads of cylinders
No clutch: 1215
with clutch: 1260

SPECIFICATIONS

Method of mixing: Direct injection.
Fuel supply equipment: Divided.
High pressure fuel pump: Eight glider.
Rotation frequency control: Centrifugal, pollen with supervision proofreader.
Nozzles: Closed, with a multi-stage sprayer.
Turbocompressor 12.1118010: Turbine radial centripetal; Centrifugal compressor.
Lubrication system: Mixed: under pressure and splashing, with cooling oil in a liquid-oil heat exchanger. In addition, oil on channel system and pipelines is supplied for inkjet cooling pistons.
Oil filters: Two: Four-way with replaceable filtering elements and centrifugal with reactive drive.
Oil pump: Single-generation, gear type.
Cooling system: Liquid, closed type, with coal circulation of coolant; Equipped with a thermostatic device.
Starting device: Starter 2501.3708-01, direct current, sequential excitation with electromagnetic drive. Rated power of 8.2 kW (11 hp), nominal voltage 24 V.
Fixture to facilitate startup: Electrokel device.
Generator 6582.3701-03: AC with a belt two-wheel drive, rated voltage 28 V, with a built-in voltage regulator, with a maximum load current 80 A.
Clutch: YAMZ-184. A diaphragm, one-piece, drawn type.
Transmission: It is possible to install transmissions made according to size code No. 1 ISO 7648 (SAE No. 1), or others in agreement with the customer.