Cummins 3973228 Diesel pump
1. Exact fuel injection: the use of advanced technologies for accurate control of the amount and time of injection, which allows you to completely burn the fuel, increase the engine power and reduce fuel consumption.
2. Strong and durable: made from high -quality materials and processed using special technology, it can withstand severe working conditions, such as high pressure and high temperature, with high stability and long service life.
3. Good adaptability: designed for various models of Dongfeng Cummins engines, is easy to install, universal and can be quickly adapted to different equipment.
Product representation
Detailed product information
There are various models: for example, the 10403716105 and 4941011 TNVD, suitable for engines 6CTA8.3 - G2, as well as the fuel pump 6BT5.9 4937514, the NTVD unit C3973228 CCR1600 4921431, etc.
Design features: if you take as an example a high pressure fuel pump 6A106, then the design of its case is mainly the same as that of a type A pump used in domestic diesel engines without turbocharges, and plunger details, oil valve parts, distribution shaft, etc. d. are interchangeable. Special mechanisms, such as a contraition compensator, the launch electromagnetic enrichment valve and the device for blocking the fuel injection phases, were added to the revolutionary control regulator.
The principle of operation: high -pressure fuel pump drives a plunger, which moves up and down through the rotation of the camshaft, sucks fuel from the fuel tank and pumps pressure into it. In accordance with the working order and time of the engine injection, high pressure fuel is transported to the injector through the high -pressure oil pipeline, and then the injector sprays fuel into the engine combustion chamber. The electromagnetic fuel enrichment valve makes the fuel pump inject more fuel into the cylinder during the launch to facilitate the launch, and the boost compensator can automatically adjust the fuel supply in accordance with the pressure pressure.
Stages of installation
Preparation: Prepare the necessary tools, make sure that the workplace is clean and tidy, and the engine is stopped and cooled.
Install the flywheel: turn the flywheel counterclockwise (facing the flywheel) 26 ° in front of the upper dead compression point of the first cylinder. The pointer on the flywheel body will indicate the appropriate position.
The handling of high pressure fuel pump: Open the timing cover of the new high -pressure fuel pump and remove the installation pin. Turn the switching shaft of the fuel pump until the pin becomes parallel to the center of the hole for the pin, the mounting pin groove can clamp the pin and it can be freely inserted down, and then pull out the installation pin.
Set the high pressure fuel pump: since the gear of the high -pressure fuel pump drive has brackets, slightly tilt the upper part of the high -pressure fuel pump towards the installer and set the high -pressure fuel pump, slightly rotating it in the direction of the gear. Please note that when assembling, do not rotate the gear of the drive of the fuel pumps as much as possible. After installing the high -power control system, its upper part should be slightly tilted towards the engine housing, but the oil tube should not touch the engine housing.
Tighten the bolts: tighten the bolts between the intermediate flange of the high -pressure fuel pump and the lid of the transmission chamber. If the hole of the medium flange is not complicated with the lid, weaken the four nuts that attach the fuel pump flange, carefully tap it along the edge of the middle flange to turn it into a position, a coaxial one with a hole, and then tighten the weakened four nuts.
Check the installation pin: turn the flywheel clockwise at 30 °, then turn the flywheel counterclockwise 26 ° in front of the upper dead compression point of the first cylinder and check whether the installation pin is freely clamped by the part of the pin and inserted into the lower part.
Reinstall the installation pin: after checking the installation pin, it must be pulled out and insert the end with a slot up into the hole (reverse placement), then screw it up and tighten the protective cap. If the groove of the installation pin cannot be inserted into the part of the camshaft pin and the error is small, first pull out the installation pin, weaken 4 fasteners on the opening in the shape of the waist of the NTVD mounting flange, click on the pump body so that the part of the installation pin on the distribution is in the middle of the opening installation pin, and then repeat the check with the installation pin. After passing the check, tighten 4 weakened nuts.
Connecting parts: set the removed high -pressure oil pipeline in place, the throttle cable, the connecting line of the electromagnetic valve of the fuel supply stop, the bias compensator, the fuel tank, the fuel tank, the lubricating oil and the bracket of the highway is.
Remove the air: weaken the exhaust bolt on the fuel filter, press the fuel pump several times while in diesel fuel flowing from the final bolt, there will be no air bubbles, and finally, tighten the exhaust bolt.
Common malfunctions
Starting
A short circuit of the electromagnetic valve: if the coil of the electromagnetic valve is clicked, when checking using the multimeter resistance unit r = 0 or less. After the power is turned on, the electromagnetic valve quickly heats up or even becomes too hot, which leads to difficulties when starting.
The open circuit of the electromagnetic valve: if the coil of the electromagnetic valve is open, then when measured using the resistance unit of the multimeter, the arrow does not move, the display is endless, there is no sound sound, the diesel engine cannot get enough tubular oil and it is difficult to start.
Line fault: if the line is closed or open, the electromagnetic valve cannot be turned on and work normally when the starter is running, which affects the starting characteristics.
Fuel supply
The plunger spring is broken: too much axial gap of the camshaft, weakened the positioning screw of the pusher, the preliminary tightness of the plunger spring or an uneven force, too much the force of the spring or low quality, there were problems with the assembly of the lower planting shoulder of the plunger spring, etc. can lead to a breakdown of the plunger spring and influence to supply oil.
A malfunction of the bunch compensator: if the adjusting pin stuck, the fuel supply cannot be normally adjusted in accordance with the pressure pressure, which leads to a decrease in the output power of the diesel engine and the deterioration of its power characteristics.
Oil pump leak: leakage through the oil pump, damage to the sealing ring or leak through the oil seal will lead to the appearance of diesel fuel in engine oil, which will affect the normal operation of the fuel system.
Operation
The crack in the damper of the fuel pump pulses: poor slowdown, unstable engine operation, unstable idle stroke, unexpected stop and other phenomena.
The gear or shaft of the fuel pump does not rotate, the checkpoint valve is always open or the pressure regulation valve is stuck: this will lead to low fuel pressure, which is why the engine will be poorly launched, uneven, cannot reach the rated speed and will have low power.
After -sales service
Service network: Dongfeng Cummins has an extensive network of service centers throughout the country that can quickly respond to customer needs and provide users with timely maintenance services.
Professional maintenance: maintenance specialists have high professional capabilities and rich experience, they can quickly and accurately diagnose and eliminate various malfunctions of high -pressure fuel pumps.
A variety of services: we provide a variety of maintenance methods covering the installation of equipment, commissioning, maintenance and other aspects. We can optimize productivity in accordance with the needs of customers, conduct regular comprehensive inspections of injection pumps and engines, and also eliminate the malfunctions in a timely manner.
Conscious of customers: we pay special attention to Customer Care, we deeply understand their needs, provide pre -sale consultations, support during sales and after -sales service, answer customer questions about the choice, use and maintenance of injector pumps so that customers can use them with great calm .
Dongfeng cummins cover the common malfunctions of the fuel pumping pumps. Below is a more detailed introduction:
It is difficult to start or impossible to start
Electromagnetic valve malfunction: the electromagnetic valve is closed. With a short circuit of the coil, the resistance value is not enough when checking by a multimeter. After the power is turned on, the electromagnetic valve quickly heats up or even becomes hot, which leads to its faulty operation, affecting the supply of fuel into the fuel pump and complicating the launch of the diesel engine. The electromagnetic valve is open. If the coil is open, then when measured using the resistance unit of the arrow multimeter does not move, the displayed resistance value is endless, and there is no sound sound. The diesel engine cannot get enough tube oil and cannot start.
Fuel filter clogging: after prolonged use, the fuel filter can clog impurities and dirt in the fuel, which will lead to a deterioration in the fuel flow, a decrease in the amount of fuel entering the fuel pump of high pressure, and the inability of the fuel pump of high pressure ensure sufficient fuel pressure and the volume of oil, which will cause difficulties in starting or refusing to launch.
The problem with the fuel line: there can be air in the fuel line, which leads to the formation of an air traffic jam, which affects the normal supply of fuel and leads to the fact that the fuel pump of high pressure cannot supply fuel normally. In addition, damage or leakage in the fuel line will lead to a drop in fuel pressure, which will also lead to difficulties when starting the engine.
An error of injection synchronization: if the synchronization of the fuel pump injection is inaccurate, leading or delaying, the fuel will not be sprayed into the combustion chamber at the right time, which will lead to incomplete combustion, which will cause difficulties with launch or its impossibility. The reason for this may be an incorrect installation of high -pressure fuel pump, wear of the distribution shaft or weakening of the fastening of concomitant parts.
Abnormal fuel supply
Damage of the plunger spring: there are many reasons that can lead to breakdown of the plunger spring, for example, an excessive axial clearance of the distribution shaft, weakened screws of positioning the pusher, excessive preliminary load when installing the plunger spring or uneven force, problems with the quality of the spring itself (excessive force force or the sprinkle or the springs or force of the spring low -quality material), problems with the assembly of the lower Planting shoulder of the plunger spring, etc. If the plunger spring breaks, this will violate the normal movement of the plunger, which will lead to unstable or insufficient oil supply.
A malfunction of the boost compensator: for example, if the adjusting pin is stuck, the bunch compensator will not be able to normally adjust the fuel supply in accordance with the changes in the boost pressure. With an increase in boost pressure, the supply of fuel cannot increase accordingly, which leads to a decrease in the output power of the diesel engine and the deterioration of its power characteristics; Conversely, with a decrease in the pressure pressure, the supply of fuel cannot be reduced in a timely manner, which can lead to excess of fuel and reduce engine performance.
Oil pump leak: a leak through the oil pump, damage to the sealing ring or leak through other seals can lead to diesel fuel in the engine oil. This will not only affect the lubricant properties of motor oil, but also cause problems with the supply of fuel to high -pressure fuel pump, which will lead to unstable or insufficient fuel supply.
Uneven fuel injection
Injector malfunction: wear, clogging or damage to the internal parts of the injector will lead to uneven fuel injection and inconsistent amount of injected fuel in each cylinder. This will lead to unstable engine operation, which will lead to vibration, power loss, etc.
The wear of the internal parts of the high -pressure fuel pump: the internal parts of the high -pressure fuel pump, such as the plunger and the oil supply valve, wear out after prolonged use, which leads to a decrease in the efficiency of the seal, an uneven volume of fuel injection and injection of the injection, which affects the working characteristics of the engine.
Unstable work (interruptions, unstable idle passage)
Damage to the fuel pump pulses of impulses: if the fuel pump impulses are broken or out of order, it cannot effectively absorb the impulses generated during the operation of the fuel pump, which will lead to large fluctuations in the fuel pressure and cause poor slotten out of the engine, uneven operation, unstable idle walk etc.
A fuel pump malfunction: such malfunctions such as a non -fuel pump, a constantly open shelter pump check valve and jamming of a pressure control valve, can lead to too low or unstable fuel pressure. This will lead to the fact that the engine will not be able to ensure a stable supply of fuel during operation, which will lead to unstable operation, insufficient power, speed fluctuations and other problems.
Abnormal noise
Wear or damage to internal details: wear or damage to gears, bearings, distribution shafts and other parts inside the high -pressure fuel pump will lead to abnormal noise during operation. For example, worn gears can cause poor engagement and sharp noise; Damaged bearings can cause the vibration of rotating details and the occurrence of deaf noise.
The problem of installation: if the high -pressure fuel pump is installed unreliable or the installation position is selected incorrectly, this can lead to vibration and noise during operation. In addition, weakened parts connected to the fuel pump of high pressure can be the cause of the noise.
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Выставочные шкафы
Знакомство с заводом
На заводе работает команда высококвалифицированных и опытных инженеров, которые непрерывно внедряют технологические инновации и совершенствуют продукцию. В настоящее время предприятие владеет рядом независимых прав интеллектуальной собственности и запатентованных технологий. Выпускаемая строительная техника включает широкий ассортимент оборудования, такого как экскаваторы, погрузчики, краны, бульдозеры и другие машины. Продукция отличается высокой производительностью, надежностью, энергоэффективностью и экологичностью, а также способностью адаптироваться к сложным условиям эксплуатации в различных климатических и рабочих средах по всему миру.
Награды и квалификация
часто задаваемые вопросы
1. In which countries are we exporting?
Asia: Vietnam, India, Indonesia, Pakistan, Kazakhstan, Uzbekistan, etc.
Europe: Russia, Belarus, Ukraine, Lithuania, Saudi Arabia, etc.
South America: Brazil, Chile, Paraguay, Argentina, etc.
Africa: South Africa, Ethiopia, Libya, etc.
2. What kind of payment conditions can we accept?
Usually we can work on T/T, 30% TT before production and 70% TT before shipping
3. What ways can we work for delivery?
1) for most countries in Europe, South America and Africa, etc. We can go along the container or Roro through the ocean freight.
2) for neighboring countries of China, such as Russia, Vietnam, Kazakhstan, Uzbekistan, etc. We can deliver by road or railway.
3) for light spare parts in the urgent requirement, we can send it using the international courier service, such as DHL, TNT, EMS or other air transportation.
4. How can you guarantee that you delivered goods to customers?
A: We will provide you with complete information about delivery for you.
5. What are our advantages compared to other manufacturers/factories?
1) Reliable quality: we carefully choose permanent manufacturers to support spare parts, such as engines, bridges, transmission, and many parts developed and produced by us always adapting the best materials.
2) a competitive price: the concentration of mechanized production in large quantities reduces production costs to ensure a competitive price.
3) The service team: firstly, our sales managers work 24 hours a day, are ready to answer your questions at any time. Secondly, a professional training team with senior equipment, ready to provide support services to users and dealers. Most problems can be solved within 24 hours.
4) Fast delivery: As a rule, we can deliver within 10 working days at the plant after receiving prepayment from customers.
6. How can you provide customers after sales service?
A: We will answer you at first and help you solve problems within 24 hours. If we really need your local, we
We will send your professional person to your settlement to help you solve problems without any fluctuations, supply you with comprehensive
