What offended? I just ask a person with no experience not to mislead colleagues.
on one gazelle they could not take it off - they broke the valve cover - they took off the cylinder head and carried it to the press .. I don't know how they pressed it there - as a result, they broke my head in half. but the owners did it themselves - I only saw the result.
And I zakolhoz such pribluda. Looked at in the manual for UAZ Hunter
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Modern commercial vehicles are unthinkable without a diesel engine. Because the diesel engine has long been synonymous with fuel economy, high-torque performance and, as a result, ease of control. Commercial vehicles of the GAZ brand do not differ much from the cars of world manufacturers in this regard and they actively use diesel engines.
If the car shows signs of a possible failure of the car's fuel equipment, such as smoke of various shades from the exhaust pipe, engine interruptions, loss of traction, as well as difficult starting of the car's engine, then you need to contact a car service for a competent diagnosis.
If the diagnostics reveal a malfunction of the fuel injectors, then we can offer not only replacement, but also repair of the injectors. Unlike other manufacturers of fuel equipment, there is a fairly wide range of spare parts for Bosch mechanisms. This allows you to quickly, efficiently and with high reliability to repair the fuel equipment of Gazelle and Sobol vehicles.
Since the injectors are made of high-quality materials, some parts of the injectors can not only be replaced with new ones, but also restored without losing their resource. The tight repair times for commercial vehicles are of particular importance. Therefore, for the owners of such cars, we offer special terms of cooperation. Call us and we will agree with you the time of diagnostics of your car. This will shorten the waiting time when picking up the vehicle.
We offer a comprehensive solution that allows you to quickly and responsibly eliminate vehicle malfunctions.Having carried out diagnostics and repairs, we eliminate the malfunction, and do not shift the decision onto someone else's shoulders, referring to incorrect diagnostics or installation and the absence of specialists in another car service.
The list of possible faulty parts varies depending on the reason for the appeal, but whatever the reason for the appeal is: it won't start, smoke, won't pull, increased fuel consumption, etc., it is necessary to check not only the injectors and the high-pressure fuel pump, but also the sensors , turbine, intercooler and other elements of the car. If the diagnostics of the car reveals the need to check the injector, then for only 295 rubles, at a modern stand, in a short time, we will check the operability of the injector removed from the car. This test bench simulates all operating conditions of the injector in the engine, starting from the minimum fuel supply, as in idle or preliminary injection mode, and ending with the maximum supply, as with the fully depressed accelerator pedal.
We know everything about fuel equipment. Our specialists have not only been trained in the diagnosis and repair of fuel equipment, but also have extensive practical experience in diagnostics and repair of fuel equipment, as well as restoration of individual parts of fuel equipment, which allows us to perform work quickly and efficiently.
We actively cooperate with Robert BOSCH, which allows us to have spare parts necessary for repairing fuel equipment in stock, including individual injector parts, and receive information support.
If it is not possible to bring the car, bring the nozzles.
If you cannot bring the nozzles, send them, call us at the phone number indicated on the website and we will arrange delivery.
Injector control elements:
The control element of electromagnetic injectors, which are installed on Gazelle and Sable cars, is a solenoid (electromagnetic coil).
One of the main hydraulic elements. Through holes in the nozzle, fuel is fed into the combustion chamber of the engine. And the needle opens the fuel supply to the nozzle openings and prevents fuel from leaking into the cylinder when the injector is closed, as well as the ingress of exhaust gases into the fuel system. With the wrong processes
The needle in the atomizer is opened by the fuel pressure, which is controlled by a solenoid valve. The wear of this valve leads to incorrect operation of the injector, and incorrect operation of the injector affects the engine starting, fuel consumption, thrust and smoke of the engine.
The solenoid injector valve looks like this:
It is often only possible to see damage to such a valve through a microscope.
If there is damage to the ball, it is replaced with a new one, and if there is damage to the valve seat, it can be restored. Unfortunately, if the seat is very badly damaged, the valve has to be changed.
Damage to the injector body most often occurs when the injector is removed from the engine or due to improper disassembly. To prevent this, it is necessary to use special devices and tools for these operations. In the event that a nozzle with a damaged body is provided to us, it is possible to replace the body, since there is a repair fund available.
Their differences are due to the types of fuel systems that are used in diesel engines. Therefore, in order to understand the design and repair features of the injector, it is necessary to understand the principle of operation of a particular system for supplying fuel.
Due to the high pressure, a portion of the fuel is atomized into small fractions. This promotes its rapid evaporation and mixing with air, and, therefore, improves the quality of the resulting air-fuel mixture.
In order for the fuel system to clearly perform its functions, its design is constantly being improved, electronic control of the injection system is used, and various technologies are used to ensure optimal fuel injection. There are three types of fuel systems used in a diesel internal combustion engine:
classic system using a high-pressure fuel pump (high pressure fuel pump);
a battery-type fuel system with a common fuel line (Common Rail);
system in which pump-nozzles are used (Pumpe-Duse).
Cummins engines use a variety of fuel delivery systems to accommodate different injectors. However, each of them meets international requirements for reliability and environmental friendliness. In addition, Cummins injectors can be repaired, which reduces the cost of operating the engine. Next, we will consider methods for troubleshooting and repairing Kamens injectors.
In this case, the most common failure of a nozzle is a failure of the atomizer. In addition, subject to wear: the nozzle nut, the nozzle body and fungus, and the spacer. Wear is manifested in mechanical damage and deformation of the nozzle parts, as well as a change in the linear dimensions of its parts.
There are external signs by which you can determine the need to check the condition of the injectors. These features include gaps and loose fit between the body and other parts of the nozzle, resulting from linear distortions or wear of the atomizer mounting nut.
The peculiarity of the assembly of the gas distribution mechanism of the Kamins engine is that during it, parts made of heat-resistant steel are used, and the exhaust valves installed in the engines are made of chrome-silicon alloy. Engine assembly details are here.
Another alarm is a drop in pressure that causes the nebulizer to open. In normal operation, during the entire period of operation of the nozzle, the opening pressure should not decrease by more than 10% from the nominal value set by the manufacturer. Excessive pressure drop can be caused by wear on the spring or on the nozzle surfaces.
A worrying factor is reduced fuel delivery to the atomizer and improper injection. All this affects the quality of the engine's operation and leads to a loss of power or an increase in the opacity of work.
Checking the leaks with the cylinders shutting off in turn will not help to determine the location of the leak, since it is located before the needle valve of the injector.
Since all injectors receive fuel from a common fuel line, losses will be distributed evenly across all cylinders.
There are a number of operations, individual for each engine model, focused on separating the fuel streams and measuring the fuel consumption coming from the injectors.
Initial check
After the preparatory operations have been carried out, you can start measuring the level of fuel consumption, but first, remember the important rules.
So, we start checking and first of all we start the engine. Next, enable the Fuel Leak Test available with the INSITE ™ Diagnostic Kit. It is necessary to wait at least a minute for the nozzles to warm up to operating temperature, as this will provide more accurate measurements.
Install the drain hose into a graduated cylinder and measure the amount of fuel flowing out per minute.
Fuel consumption rating with INSITE ™ check enabled
4-cylinder - no more than 200 ml,
6 cylinder - no more than 300 ml
Standard fuel consumption in idle mode
4-cylinder - no more than 120 ml,
6-cylinder - no more than 180 ml.
It should be borne in mind that in this mode, it is possible not to detect a fuel leak.
If fuel consumption is higher than the specified limits, it makes sense to carry out a check with insulation of the injectors.
Having found out that the problem of excessive fuel consumption in the injectors, they should be removed and checked for the possibility of further operation.
It should be noted that the removal of the injectors should be resorted to only if the malfunction was confirmed by diagnostic procedures. The injector can only be dismantled with the ignition off after preliminary cleaning of all connections of the fuel system with stiff brushes, rinsing and drying with compressed air.
Training: remove the fuel line, the fuel line fitting, the rocker arm cover and the exhaust rocker itself.
Removing the injectors. First, disconnect the wiring leading to the solenoid valve, and then remove the two bolts of the injector holder, and then the holder itself. Remember, the injector holder is not removable on all engine models. Use a special nozzle puller, or you can use a small pry bar to pry the nozzle by the pressure flange.
Use a cloth soaked in solvent to clean the nozzle body and tip. Check tip for corrosion or carbon deposits. Check all terminals of the solenoid valve for damage.
Check the end of the fuel line fitting and the injector inlet for damage. If overheating took place during the operation of the injectors, then blue or dark yellow spots will appear on it (depending on the overheating temperature).
Check the injector O-rings for damage and replace if necessary.
After a general inspection, repair of the cummins injector pump and, if necessary, replacing defective parts, we proceed to installation.
Lubricate the O-ring with engine oil and align the injector in the correct position on the cylinder head (inlet facing the fuel line fitting). Check that the nozzle fits snugly in the hole.
If the injector is without the solenoid valve packing cover, try to avoid applying force to its terminals, as they may break if pressure is applied to them when installing the injector.
Without tightening the bolts, install the nozzle holder. Check the fuel line fitting for burrs or deformation around the fitting ends and inspect the slotted filter for clogging.
If all of the above signs are found, the parts must be replaced.
Install the fuel line fitting so that the end fits into the inlet of the injector. Screw on the nut of the high pressure fuel line fitting and tighten loosely. First, tighten the holder bolts evenly and make sure that the gap between the nozzle and the holder is even. But then you can tighten the fitting nut.
The Cummins ISF 2.8 engine is an excellent engine for medium-sized businesses. You can study the characteristics of an economical and efficient engine in this article.
Using a torque wrench, connect the wiring to the valve and tighten the terminals and make sure that when installing the wires do not come into contact with the rocker arms.
Final operations: install the rocker arm and adjust the exhaust valve clearances, install the rocker arm cover, start the engine fuel line to make sure there are no leaks.
In conclusion, it must be said that all types of maintenance and repair of Kamens injectors should be carried out in a specialized service center. This is due to the high requirements for cleanliness and accuracy of injector adjustment, as well as the importance of matching the injector parameters with the engine manufacturer's requirements.
Video (click to play).
Only then will the Cummins diesel engine operate in accordance with the factory parameters for reliability, durability and economy.
