Description and modifications of the MMZ D-245 engine
The MMZ 245 power unit was first developed in the early 80s and is a four-stroke engine. It was created on the basis of the earlier 240 model, and is considered its modified, improved version. Mass production of engines of this series began in 1984, and subsequently they were repeatedly refined and improved.
Despite the impressive number of modifications of this type of unit, its technical characteristics are completely the same for most versions. Among the most popular models of the MMZ D-245 internal combustion engine, it is advisable to note:
- D-245.16;
- D-245.11 E2;
- D-245.30 E2;
- D-245.9;
- D-245.35 E3 and many others.
The engine is installed on various special equipment.
Their main difference is the models of cars or special equipment in which they were installed. The manufacturer constantly improved the environmental performance of the units, thanks to which by 2016 the D-245.35 E5 version was released, which fully complies with Euro-5 standards.
How to install the ignition on a D 245 engine
Diesel trucks and tractors. Spare parts, adjustment and repair.
Diesel fuel injection pump D-245. Device and settings
The D-245 engine of ZIL-5301 cars is equipped with Bychok, GAZ-3309, MAZ-4370 Zubrenok cars, and TNVD-773 cars. The highest pressure fuel pump is a block design consisting of 4 pump sections, in one housing of which there is a cam drive of the plungers and a metering coil for cyclic fuel supply.
TNVD-773 is designed to supply metered portions of fuel under high pressure into the combustion chamber of diesel cylinders at a certain time. The fuel pump camshaft is driven by the diesel engine's crankshaft through the camshafts.
The relative position of the fuel pump drive gear and the clutch half is fixed by tightening the nuts installed on the clutch half studs. The torque value of the nuts is 35–50 Nm.
The high pressure fuel pump D-245 is combined with a general mode regulator and a piston pump for refueling.
The regulator has a fuel supply regulator, an automatic fuel supply concentrator (at initial speed) and a pneumatic smoke limiter (gain regulator). The feed pump is mounted on the D-245 high pressure fuel pump housing and is driven by an eccentric cam.
The working parts of the pump are lubricated with running oil from a set of diesel fuel dosing programs. Oil flows from the pump housing into the diesel crankcase. The newly installed diesel pump must be filled with 200.250 cm3 of oil. Fill with oil through the oil drain hole. 30 (Fig. 1).
Rice. 1 — Fuel pump TNVD 773 diesel D-245
1. Fuel pump section; 3.5. Plate; 3 - flange; 4 - key; 5 - half of the clutch drive; 6 — nut for fastening the coupling half; 7 - camshaft; 8 — fuel pump housing; 9 — pump for refueling; 10 — support bracket; 11 — starting feed adjustment bolt; 12 — locking lever; 13 - regulatory body; 14 — regulator cover; 15 — door inspection cover; 16 — low-speed control bolt; 17 — maximum speed adjustment bolt; 18 — nut securing the fuel pump sections; 19 — bypass valve; 20 — fitting for fuel supply; 21– oil line; 22 — device for draining fuel from the booster pump into the filter for narrow fuel purification; 23 — bolt securing the fuel supply connection to the booster pump; 24 — gain corrector; 25 — bolt of air intake fittings; 26 — control lever; 27 — adjustment of the screw for the nominal fuel consumption; 28 — air discharge tube; 29 — switching electromagnet; 30 - oil for draining holes.
Maintenance of the high pressure fuel pump of the diesel fuel pump D-245
During the use of the high-pressure fuel pump 773, when the main parts wear out, its regulatory characteristics are violated. Injection pump oil D-245 is centralized from the diesel fuel dosing system through a special oil pipe. The required oil level in the crankcase is set automatically.
To reduce wear on precision parts, do not operate the high pressure fuel pump without a filter element or with a clogged fine fuel filter. It is also prohibited to work with fuel that contains inflated water.
READ How to disassemble the ignition switch of a VAZ 2107
If necessary, also every 120 thousand kilometers it is necessary to remove the pump and check it on the circuit board for compliance with standard characteristics, in addition, set the angle of inclination of the fuel injection time into the diesel engine. Make appropriate adjustments if necessary.
Engine installation D 245 Ignition installation
How to install the ignition
for the D-245 E2 engine, finish assembling the engine # long-range # truck # ointment # tooth.
How to set the injection or ignition timing on the MTZ 82 tractor
Adjustment and control of the fuel pump 773 to set the fuel injection advance angle on the D-245 engine
If it is difficult to start a diesel engine, remove smoke and install a fuel pump when replacing it after checking the panel every 120 thousand kilometers or repair a diesel engine, be sure to check the fuel installation angle on the diesel engine.
Angle of setting the fuel injection timing, degrees of crankshaft rotation for the fuel pump of the high pressure injection pump 773.1111005-20.05. 4.5 ± 0.5
Check the fuel injection angle in advance for the high pressure fuel pump 773 of the D-245 engine in the following order:
Rice. 2. Installation of the latch in the hole in the rear sheet and flywheel of the D-245 diesel engine
If the latch does not align with the hole on the flywheel, adjust the 773 high pressure fuel pump to do the following:
Check the start of fuel supply. Disconnect the tester and reinstall the high pressure pipe and manhole. Screw the latch into the hole on the back panel.
Rice. 3. Drive of the fuel injection pump of the D-245 engine
1 — hatch cover; 4 - nut; 3 — hairpin; 4 - special nut; 5 - half of the clutch drive; 6 — fuel pump drive gear
Checking diesel injectors D-245 for starting injection pressure and fuel spray quality
Rice. 4 — Engine injector D-245
1 — nozzle body; 2.4 — adjusting washer; 3 - spring; 4 - nozzle rod; 5 - spacer; 5 - spray nut; 7 - spray; 8 - sealing ring.
Check the injectors every 120,000 km. Remove the injectors from the diesel engine and check them on the panel. The 773 fuel pump injector is considered to be in good condition if it atomizes fuel with a mist between all 5 spray ports without any dripping drops, solid streams or individual condensation.
The beginning and end of the injection should be clear, drops should not appear at the tip of the spray. Check the quality of the spray with a frequency of 60-80 injections per minute.
If desired, adjust the nozzles by setting the total thickness of the shims 4.5 (Fig. 4): increasing the total thickness of the shims (increasing spring compression) increases the pressure, decreasing it decreases it. A change in the thickness of the washers by 0.1 mm leads to a change in the pressure at which the nozzle needle begins to rise by 1.3. 1.5 MPa.
The value of the initial injection pressure for injectors: 455.1112010-50 - 24.5 MPa; 172.1112010-11.01 - 25.0. 26.2.4 MPa. Install the injectors on diesel. Tighten the injector mounting bracket bolts moderately in 2-3 stages. The final tightening torque is 20.25 Nm.
Source
Engine Specifications
Before studying the D 245 crankshaft, turbocharger, and other components, it is necessary to consider the technical characteristics in more detail. It is worth noting that they are completely identical for all modifications. Among them, the main parameters are the following:
- number of cylinder head cylinders - 4 pcs;
- power unit volume - 4.75 liters;
- cylinder diameter - 1.1 cm;
- type of gas exchange system - TW;
- engine power - 122.4 hp;
- type of fuel consumed - diesel;
- product weight - 600-640kg.
The engine is widely used and is used in many models of commercial trucks, various types of special equipment, and other devices.
Be sure to read: Technical characteristics of the D-242 engine
Models of MTZ tractor generators
The evolution of MTZ tractor models and the increase in the equipment of machines with electrical equipment led to the use of generators of a similar design with higher power and corresponding technical characteristics. Modern MTZ machines with a network voltage of 12 volts are equipped with units of the following series: G46.3701 with a power of 700 W; G96.3701 with an output power of 1000-1150 W and G 97.3701 with a power of 1400 W. For MTZ machines with a network voltage of 24 volts, units of the G99.3701 series with a power of 1000-1150 W and 98.3701 with a power of 1500 W are installed. Modifications of units differ in the design and size of the drive.
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Device D-245
The design of the motor is quite simple, which greatly facilitates its repair and maintenance. The main element is the body, which includes the suspension itself and the cylinder block. The gas distribution mechanism, consisting of cylinder heads, valves, manifold and other elements, deserves special mention.
Other important components of the D-245 include:
- crank mechanism;
- lubrication system;
- fuel system;
- The unit is cooled by liquid and includes a thermostat that controls the temperature.
To improve the performance characteristics of the unit, a turbine is used in its design, which improves exhaust gas emissions and also increases torque.
To avoid the problem that is typical for all diesel injection pump engines - interruptions when starting in winter, glow plugs are installed on the cylinder heads, and the fuel system maintains the desired oil temperature.
Spare parts catalog
Having disassembled the structure of a power unit of a similar model, it is advisable to note its high maintainability. If desired, the car owner can independently purchase spare parts, for example, a starter or flywheel, and then fix the problem.
The popularity of the engine among consumers is due not only to excellent performance, but also to low maintenance. As catalog D 245 shows, prices for components are quite low, which allows you to avoid significant costs when repair work is necessary.
Fixing problems using spare parts is much cheaper than purchasing a complete working engine. A new unit designed for tractor equipment will cost 180 thousand rubles, and a car unit - 250 thousand. A used unit will cost less - 90-150 thousand.
Frequent problems and their diagnosis
1 So, the control light does not go out, what should you do? Do not panic and immediately check the belt tension. If it is in order, then you need to check the contacts for oxides. If performance is not restored after cleaning, you need to check the output voltage. It should not be lower than 12.5 volts.
2 If you hear extraneous noise and knocking during operation, the problem is the loosening of the pulley fixing nut. However, bearing failure is also possible. Diagnosed by routine disassembly. The bearing will noticeably crunch when worn and will need to be replaced. The nut can be lubricated with thread sealant and tightened more tightly.
The main thing is that the fit on the pulley is not disturbed. You can notice a broken seat by the free movement of the nut. In this case, it needs to be replaced.
3 Under no circumstances should the bearing be knocked out. The shaft can be damaged, and this is a major repair. A special puller is required.
Otherwise, other generator breakdowns rarely occur on MTZ tractors.
Main malfunctions of D-245
Most owners characterize this motor as a reliable and time-tested design that relatively rarely requires repairs. However, a fairly common problem is the unsatisfactory quality of parts processing and assembly, which leads to increased operating noise and vibration.
This problem also manifests itself in increased oil consumption, which significantly reduces the efficiency of the unit during use. In this regard, professionals recommend regularly changing seals and gaskets. If you want to extend the service life of the fuel system, in particular the fuel pump, it is recommended to promptly clean and change the diesel filter.
Be sure to read: Final drive design
If you neglect such advice or use low-quality fuel, one injector or several at once may become clogged, which will lead to loss of engine performance.
Description of the book
Repair book for GAZ 3308
Operation of any GAZ 3308 vehicle is impossible without knowledge of its structure, maintenance and repair features. It doesn’t matter who will carry out the necessary work - every driver is simply obliged to know the basic maintenance and troubleshooting procedures.
The GAZ 3308 repair book contains all the necessary information that will help the owner understand the structure of the car, teach how to properly care for the car, timely maintenance and proper repairs.
The GAZ 3308 repair manual is divided into chapters: Vehicle design (describes general information and vehicle specifications); Operating instructions (preparation for departure, recommendations for traffic safety); Malfunctions along the way (tips to help you in case of an unexpected breakdown on the road); Maintenance (detailed recommendations for all maintenance procedures); Repair instructions (engine, transmission, chassis, steering, brake system, and also includes assembly and disassembly work necessary during the repair process of the GAZ 3308); Electrical equipment (detailed manual for diagnosing and troubleshooting, the main units are described separately and detailed electrical diagrams of the GAZ 3308 are given).
Any of the GAZ 3308 repair procedures is given according to the principle from simple to complex: from simple maintenance operations, adjustments, replacement of parts, to global repairs with assembly and disassembly work.
All materials in the book are based on specific experience gained in the process of complete disassembly and assembly of the GAZ 3308 by highly qualified auto mechanics.
The book “GAZ-3308, 33081. Maintenance, operation, repair, electrical circuits” is necessary so that diagnostics and repairs of the GAZ 3308 can be done professionally and quickly, even by the owner of the car who still has little practical experience.
Cost of injection pump and components.
A new fuel pump will cost the buyer 25-50 thousand rubles, depending on the manufacturer. Let's take, for example, the MOTORPAL company - fuel injection pumps produced by it have a price of 25-35 thousand rubles.
It is also worth mentioning the approximate cost of the main spare parts that may require replacement, which are adequate for the current market: - nozzles (1500-3000 rubles / piece); — installation plate (3000-5000 r); — fuel injection pump drive gear (3000-5000 r); — fuel injection pump gear shaft for D-245 (3000-5000 r); — high pressure fuel line (up to 1000 r); — fuel pump (1500-3000 r).
