What Inspections Should Be Done Before Starting The Diesel Generator Set

The storage period of diesel engine of diesel generator set is one year. If the diesel engine has passed the storage period specified above since the date of delivery, special attention shall be paid to the sealing inspection before use. Next, the editor of Jiangsu Starlight Power will introduce to you what inspections need to be done before the diesel generator set is unsealed and started?

(1) Check whether the surface of the unit is thoroughly cleaned. Check whether the nuts of foundation bolts, flywheel screws and other moving parts are loose, and tighten them in time if any problems are found.

(2) Check whether the clearance of each part is correct, especially carefully check whether the clearance of each inlet and exhaust valve and the clearance of pressure reducing mechanism meet the requirements.

(3) Place each cylinder in the pressure reducing position, turn the crankshaft to check whether the engine parts of each cylinder have abnormal sound, and whether the crankshaft rotates freely. At the same time, pump the oil into each friction surface. Then, close the pressure reducing mechanism, shake the crankshaft, and check whether the cylinder has air leakage. If it is very hard to shake the crankshaft, it means that the compression is normal.

(4) Check the condition of the fuel supply system.

① Check whether the vent hole on the fuel tank cap is unblocked. If there is dirt in the hole, clean it. Check whether the added diesel meets the required brand and whether the fuel quantity is sufficient, and turn on the oil circuit switch.

② Open the pressure reducing mechanism and crank the crankshaft. There should be a clear sound of oil injection in each cylinder, indicating that the oil injection is good. If there is no sound of oil injection and no oil coming, there may be air in the oil circuit. At this time, loosen the bleed screw of the diesel filter and the fuel injection pump to remove the air in the oil circuit.

③ Check whether there is oil leakage at the oil pipe and joint, and timely solve the problems found.

④ Fill the fuel injection pump and governor with oil to the specified oil level.

(5) Check the condition of the cooling system.

① Check whether the cooling water in the water tank is sufficient. If the water is insufficient, add enough clean soft water.

② Check whether there is water leakage at the water pipe joint, and timely solve the problems found.

③ Check whether the impeller of the cooling water pump rotates flexibly and whether the drive belt is properly tightened.

(6) Check the lubrication system.

① Check whether there is oil leakage at the oil pipe and pipe joint, and timely solve the problems found.

② The grease fittings shall be filled with specified lubricating grease.

③ Check the oil level of the oil pan, draw out the dipstick beside the crankcase, observe whether the oil level height meets the specified requirements, and add the specified grade of oil according to the different seasons and regions. During the inspection, if the oil level is found to be higher than the specified height, the reasons for the increase of oil should be carefully analyzed. Generally, there are three reasons:

(a) Add too much oil.

(b) The diesel leaks into the crankcase and the engine oil is diluted.

(7) Check the electric starting system.

① First check whether the relative density of the starting battery electrolyte is within the range of 1.240~1.280. If the relative density is less than 1.180, it indicates that the battery is low.

② Check whether the circuit wiring is correct.

③ Check whether there is dirt or oxidation on the battery terminal, and polish it clean.

④ Check whether the electrical contact of starting motor and electromagnetic control mechanism is good.

Generally, do a good job in the pre-sealing inspection of the diesel generator set, just like a blank house inspection, to avoid unnecessary trouble in the future and affect the normal operation of the diesel generator set.

Jiangsu Starlight Electricity Equipments Co.,Ltd. is a professional manufacturer of generators, diesel generator sets, Shangchai generator sets, Volvo generator sets, etc. It has 64 sales and service departments, and provides users with one-stop service of design, supply, debugging and maintenance at any time. Welcome the majority of users call for consultation. For more details, please contact us with sales@dieselgeneratortech.com.

Congratulations To Starlight Power For Signing Another Diesel Generator Set

On January 4, Starlight Power Guangxi Branch and Guangxi Songjiang Real Estate Development Co., Ltd. successfully signed a 550KW diesel generator set, and successfully won the first order of “New Year’s Prosperity” in Guangxi. All employees of Jiangsu Starlight Electricity Equipments Co.,Ltd. Guangxi Branch congratulated on this.

Guangxi Songjiang Real Estate Development Co., Ltd. was established in January 2010, jointly funded by Tianjin Songjiang Co., Ltd. and Shanghai Zhuangheng Investment Co., Ltd. With a registered capital of 40 million yuan, the company has the second level qualification for real estate development, and is fully responsible for the real estate development business in Guangxi Beibu Gulf region. The company purchased a 600KW diesel generator set in Starlight Power in June 2013. The performance of the set is relatively stable during use. The after-sales service personnel of Starlight Power can also conduct regular on-site maintenance. The user is very satisfied with Starlight Power’s products and services, so he chooses to purchase a diesel generator set in Starlight Power again.

Jiangsu Starlight Electricity Equipments Co.,Ltd. is a manufacturer of professional generators, diesel generator sets, Cummins generator sets, Volvo generator sets, etc. The company has advanced testing equipment, excellent production technology, professional manufacturing technology, perfect quality management system, and Strong R&D technical strength. It can provide 15KW-2500KW various specifications of universal, automatic, four protection, automatic switching, low noise and mobile, etc., high-quality, low-energy generating sets to meet customer power needs, and can also meet users’ different voltages and different frequencies, as well as the power supply system of multiple units connected in parallel, welcome customers to inquire. For more details, please contact us with sales@dieselgeneratortech.com.

300kw Diesel Generating Set

On April 16, Starlight Power and Nanjing Jianyou Biochemical Pharmaceutical Co., Ltd. successfully signed a 300kw silent diesel genset for emergency backup power supply. The unit adopts vibration isolation, noise reduction, sound insulation, sound absorption and other noise reduction technologies, which greatly reduces the noise index, and has the functions of self-starting, self-stopping, and self-protection. In addition, Starlight Power also provides free debugging, free maintenance, free training and other services.

Nanjing Jianyou Biochemical Pharmaceutical Co., Ltd. was established in 2000, formerly known as Nanjing Second Biochemical Pharmaceutical Factory, located in Nanjing High-tech Industrial Development Zone, with a registered capital of 423.5 million yuan. It is one of the earliest pharmaceutical companies in China engaged in the extraction and purification of heparin and the development of the structure confirmation method of heparin-like mucopolysaccharide products. It has been engaged in the production of heparin products for more than 20 years and is an important domestic heparin product manufacturer. Thanks to Nanjing Jianyou Biochemical Pharmaceutical Co., Ltd. for choosing Starlight Power as the supplier for this diesel generator set purchase.

Jiangsu Starlight Electricity Equipments Co.,Ltd. is an OEM partner of Shangchai for many years. It has more than 40 years of experience in the production and manufacturing of diesel generator sets. It can provide users with various specifications of 15KW-2500KW. And other high-quality, low-energy generating sets to meet all customers’ power needs. In addition, it can also meet the requirements of users with different voltages and different frequencies, as well as the power supply system of multiple units connected to the network. There are 64 sales and service departments nationwide, providing long-term technical consultation, free debugging, free maintenance, and free training services for users. Welcome contact us by email sales@dieselgeneratortech.com.

Starlight Power 500KW Diesel Generators

Recently, Jiangsu Starlight Electricity Equipments Co.,Ltd. and Guangxi Gangqi Investment Co., Ltd. successfully signed a 500KW diesel generator set and an environmental protection and noise reduction project for the engine room. It is understood that these two sets will be used in Fangchenggang Evergrande Yuelanwan Project.

The 500KW diesel generator set ordered by the customer adopts a well-known brand engine with high horsepower, large torque, high stability, low fuel consumption, low emission, low noise and high cost performance. This 500KW diesel generator integrates the leading technologies of large and medium-sized diesel engines from all over the world, and is equipped with booster pressure intercooling, high-pressure common rail, and motor-controlled single pump. It has the characteristics of green environmental protection, high stability, strong loading capacity, and good maintenance characteristics.

Starlight Power can provide engineering project services such as diesel generator room noise, environmental protection equipment engineering, main engine room lighting fixtures, and exhaust emission treatment. Commitment to construction quality regulations in line with China’s relevant technical standards and engineering construction acceptance standards and procedures. In order to ensure the safe application of 500KW diesel generator sets for customers, Starlight Power also provides a 1-year or 1,000-hour (whichever comes first) diesel generator set warranty period for each project.

Jiangsu Starlight Electricity Equipments Co.,Ltd. is one of the earliest manufacturers of generators and diesel generator sets in China. The company was established in 1974 and the company occupies an area. With an area of 86,000 square meters and a building area of 45,000 square meters, it has 64 sales and service departments across the country to provide users with one-stop service of design, supply, debugging and maintenance at any time. Welcome customers to come to consult and visit. Looking forward to your inquiry, please send email to us for details sales@dieselgeneratortech.com.

Are you famililar with wind power generator and diesel generator?

There are many kinds of generator, for example, the most common generator is diesel generator, wind power generator, gasoline generator etc. Every kind of generator has its characteristic, we can know which is better by learning about them and comparing them. In this article, we mainly talk about wind power generator and diesel generator.

1.Wind power generator

Working principle:

Wind power generator is a electrical equipment which converting wind energy into mechanical work, the mechanical power drives the rotor to rotate, in finally, outputs alternating current. In generally, wind-driven generator set are composed of wind turbines, generators (including devices), directional regulators (tail wings), towers, speed-limiting safety mechanisms and energy storage devices.

The wind wheel rotates under the action of wind force, it converts the kinetic energy of the wind into the mechanical energy of the wind wheel axle, generator generate electricity driven by rotor shaft rotating. It can be divided into steam turbine, gas turnine and hydroturbine. Widely used as power engines for power generations, aviation, navigation, etc. Actually, the wind turbocharger is an air compressor, which increases the air intake through compressed air. It uses inertial impulse to increase engine output power.

Advantages :

A.Reducing environmental pollution and saving conventional energy such as coal and petroleum;

B.Clean, good environmental benefits, no harmful gases and waste are emitted;

C.Renewable, never exhausted;

D.Short construction period and flexible installation scale;

Disadvantages :

A.Ecologically, disturb birds. For example, grouse in Kansas, USA, disappeared after the windmill appeared;

B.Noise and visual pollution; Wind generators are generally relatively big and heavy;

C.It occupies a large area of land;

D.Unstable and difficult to control. In many places, winds are intermittent, if the winds are small, produced power electricity will be small, so that it maybe influence people to use electricity;

E.Not portable. If electricity supply is short, it can not be use as standby or emergency unit.

2.Diesel generator

Working principle:

In the air cylinder of diesel generator, The clean air filtered by the air filter is fully mixed with the high-pressure silent diesel fuel injected by the injector. Under the pressure of the piston upward, the volume of the diesel fuel decreases and the temperature rises rapidly, reaching the ignition point of the diesel fuel. Diesel fuel is ignited, mixed air burns rapidly and volume expands rapidly, which pushes forward plunger down, this called “ work”. Every air cylinder works in a sorted order, the thrust acting on the plunger passes through the connecting rod and becomes the force driving the crankshaft to rotate, thus driving the crankshaft to rotate. When the brushless generator is coaxially installed with the crankshaft of the diesel engine, the rotation of the diesel engine can be used to drive the rotor of the generator, using the principle of “electromagnetic induction”, the generator will emit the induced electromotive force, and the current can be generated through the closed load loop.

Advantages:

A.Fuel economy and high thermal efficiency;

B.Reliable and durable, can be used as prime, standby or emergency unit;

C.Wide range of applications. It is widely use for home, office, industry etc. Especially in some remote and power shortage places;

D.High thermal efficiency and low fuel consumption;

E.Compact structure and flexible installation location of supporting equipment.

Disadvantages:

A.The noise produced during the work is relatively large and the vibration amplitude is also large (But now there is silent type generator set, will reduce noise relatively);

B.The structure is complex, and the processing precision of parts and components is required to be high;

C.High fuel requirements. And the cleanliness of fuel is strictly required. It is difficult to use solid fuel or inferior fuel inside the cylinder.

Thus it can be seen, they all can supply power electricity, this is the same between them. The difference is : wind-driven generator is utilization of renewable resources, and very clean. While wind-driven generator set is not more portable than diesel generator set, wind generator set needs impact of airflow to drive the impeller to rotate, so that can supply electricity, it is some limited, constrained by the environment, the cost of installation is higher for home use. Diesel generator set is use diesel fuel, diesel fuel is common seen, very convenient to buy, the cost also can be accepted by many people. Diesel generator set is limited in volume and easy to handle in daily use. In generally, we use forklift truck to handle. If some construction sites need to use diesel generators, this is also convenient to carry. Just find a car and pull it away directly. Wind generator set is bigger, after finishing installation, if we want to handle, it is more difficult.In the process of transfer, there will be a lot of constraints. In the mainland cities, this kind of wind generator set can not be used by everyone. So if between wind generator set and diesel generator set, it is more reasonable to choose diesel generator set.

Starlight Power Sold 550KW Yuchai Diesel Genset

On June 6, 2021, Starlight Power and Beihai Yindu Urbanization Construction Co., Ltd. successfully signed a 550KW Yuchai diesel generator set, which is used for the emergency backup power supply of the 4 plot of the Dadu Jincheng project. In addition, Starlight Power is also responsible for the environmental protection and noise reduction project of the generator room.

It is understood that Beihai Yindu Urbanization Construction Co., Ltd. is a subsidiary of Guangxi Dadu Investment Co., Ltd., and Guangxi Dadu Investment is a diversified investment enterprise focused on real estate development by Guangxi Construction Engineering Group. The Dadu Jincheng project in this cooperation is the second project of Guangxi Construction Engineering and Dadu Investment in Beihai, a new regional benchmark real estate. The project is located at No. 66 Yintan Avenue, Yinhai District, Beihai City, adjacent to Fengjiajiang Wetland Park and mangroves, and 8 minutes away from Beihai Yintan. The project covers a total area of 660 acres, with a total construction area of 1.5 million square meters. It has 67,000 square meters of modern marine-style enclosed gardens, nearly 1,000 meters of green intelligent walking track, 400-meter central axis landscape, sunshine swimming pool, children’s paradise, cute pet paradise, basketball court, badminton court, health center, leisure gallery and other human facilities. Starlight Power is very honored to be the procurement supplier of diesel generator sets for Dadu Jincheng project. Thanks to Guangxi Construction Engineering Group, Dadu Investment and its subsidiary Beihai Yindu Urbanization Construction Company for their support to Starlight Power.

The 550KW Yuchai diesel generator set purchased by the user is powered by the YC6TD900-D31 high-power diesel engine produced by Yuchai, and is equipped with a starlight generator. The product has the advantages of compact structure, convenient operation, stable operation, low fuel consumption, and low noise. In addition, Starlight Power also provides one-stop services such as packaging and transportation of generator sets, installation, commissioning, training, after-sales on-site maintenance and so on. Looking forward to your inquiry, for more details, please contact us with sales@dieselgeneratortech.com.

450KVA 500KVA Cummins Genset

On May 2021, Guangxi Dingbo Power Equipment Manufacturing Co.,Ltd exported one set of prime 450KVA standby 500KVA Cummins open type diesel generator set to Thailand. Thanks for the client’s support, we will always provide good quality product and perfect service for you.

Guangxi Dingbo Power Equipment Manufacturing Co.,Ltd is a manufacturer of diesel generator set in China, who has focused on generators for more than 25 years. Our diesel generator sets have sold to all over the world and gain good feedback from clients.

Today we also share technical specifications of the 450KVA Cummins generator set.

1.Technical Specifications of Generator Set
Manufacturer: Guangxi Dingbo Power Equipment Manufacturing Co.,Ltd
Genset model: DB-360GF
Prime rated power: 360KW/450KVA
Standby rated power: 400KW/500KVA
Rated voltage: 220/380V
Rated current: 648A
Frequency/ speed: 1500rpm/ 50Hz
Power factor: 0.8lag
Start-up mode: manual/automatic
Dimension: 3480x1370x2140mm ( L x W x H)
Net weight: 4000kg
Accessories: base bottom fuel tank for 8 hours, battery, battery charger, CCEC Cummins standard tool kit, use manual, factory test report, certificate etc.
2.Technical Specifications of CCEC Cummins Engine
Manufacturer: Chongqing Cummins Engine Co.,Ltd
Model: KTA19-G3
Prime/standby power: 403KW/448KW
Speed: 1500rpm
Air intake type: Turbocharged Aftercooled
No of cylinder and type: 6, inline
Displacement: 19L
Bore and stroke: 159x159mm
Compression Ratio: 13.9:1
Governor type: Electronic
Start battery voltage: 24V DC
Fuel system: Cummins PT
Total oil capacity: 50L
Total coolant capacity(engine only): 45L
Fuel consumption: 100%:205g/kw.h 75%:205g/kw.h 50%:191g/kw.h 25%:150g/kw.h
3.Technical Specifications of Stamford AC alternator
Manufacturer: Cummins Generator Technologies(China) Co.,Ltd
Model: HCI 544C1
Alternator capacity: 450KVA
Overload: 10% load can run 1 hour in 12 hours
Type: Brushless self-exciting synchronous generator
Temperature rise class: H
Insulation class: H
Enclosure protection degree of generator: IP23
Voltage regulation: AVR
Number of phase and Access Act: 3-phase 4-wire, Neutral grounding
Alternator efficiency: 95%
Bearing: single bearing
4.Controller
Manufacturer: Shenzhen Haiway Technology Co.,Ltd
Model: Deep Sea 7320

The technical specification we provided can meet client’s requirement, and we can provide competitive price, and fast delivery time. So, the client choose us. All our generator sets are brand full new and high quality, brand covers Cummins, Volvo, Perkins, Deutz, Yuchai, Shangchai, Weichai, Ricardo, MTU etc. Power range is from 20kw to 3000kw. If you also have purchasing plan of diesel generator sets, welcome to contact us by email dingbo@dieselgeneratortech.com, or call us directly by phone +8613481024441. Our sales team will work with you.

Fuel injector faults of generator set

Today Starlight silent diesel generators manufacturer shares fuel maintenance and fuel injector faults with you. Hope this article is helpful to you.

Fuel System

The fuel system of the standard diesel generator includes: fuel tank, fuel supply pump, fuel filter, manual oil pump, fuel injection pump, fuel injection nozzle and related oil pipeline.

Only fuels that meet the quality specified in the following standards shall be used. It must be kept clean during refueling and fuel system operation. When working on the fuel system, it must be confirmed that the engine has cooled down. The splash of fuel on hot surface or electrical components may cause a fire.

Fuel specification

The composition of the diesel oil has a very important effect on the operation and service life and the emission components of the diesel engine. In order to obtain the specified power, fuel economy and the emission standards specified by the local environmental protection department, only clean light fuel that meets international and national standards should be used.

Light diesel oil is used for fuel in high-speed diesel engines above 1000r/min. The current standard for light diesel oil products is GB252-2000 “light diesel oil” standard. The grade of diesel oil is based on the freezing point of diesel. Customers should choose the appropriate diesel grade according to the temperature of the workplace.

Attentions

a. The fuel recommended in the operating manual must be used. For diesel engines, the use of low-quality fuel can cause the control rod to stick and the engine to rotate at an excessive speed, resulting in damage to the generating set or even serious personal injury. Inferior fuel will also shorten the maintenance cycle, increase maintenance costs, and reduce the normal service life of the gen set.

b. When adding fuel, there is usually a risk of fire and explosion. No smoking when refueling.

c. Do not allow the fuel oil to overflow the fuel tank. The fuel tank cover should be sealed safely.

d. Water in the fuel can cause corrosion of metal parts in the fuel system, and it can easily cause fungi and microorganisms to grow in the tank, which can block the filter. When the fuel water content is relatively large, it is recommended that the user install a oil-water separator for the genset. Make sure that the fuel entering the body is free of water or other impurities. All models of medium and high units can be equipped with oil-water separators according to the requirements of users. The oil-water separators are not part of the standard configuration when the unit leaves the factory. When users need to order, it should be separately stated.

Replace fuel filter

a. Keep it clean and do not allow any dirt to enter the fuel system.

b. In order to avoid fuel splashing on hot surface and causing fire, the fuel filter replacement must be carried out under the condition of cooling machine.

c. Remove the filter and apply a little oil to the gasket of the new filter. Screw the filter by hand to bring the gasket into contact with the seat. Then tighten again, do not screw more, and exhaust the air from the fuel system.

d. Start the unit and check for leaks.

Fuel injection pump

a. The fuel injection pump is driven by a timing gear transmission mechanism in the diesel engine. The pump setting is measured with a lift meter when the base circle of a particular crankshaft angle rises.

b. The fuel injection pumps used in medium and high diesel generator sets are superior in quality and reliable in performance, which can ensure the long-term normal use of users.

Fuel spray nozzle

a. Equal distribution of fuel oil for reliable ignition and combustion.

b. Inject fuel oil directly into the combustion chamber and provide optimal mixture of fuel oil and air. The injection pressure can be pre-adjusted by a spring.

What are fuel injector faults?

1.A little or no fuel injected.

Causes:

(1) There is air in the fuel supply system.

(2) Seizure of the fuel injector nozzle.

(3) Abnormal fuel supply from the fuel injection pump.

(4) Oil leak at high-pressure fuel pipes.

(5) Wear of fuel injector nozzles.

Correction

Prime the fuel system.

Let a professional serviceman check and replace the nozzle assembly.

Refer to fuel injection pump fault for troubleshooting.

Tighten the pipe locknut and replace the pipes with crack, make replacement if required.

Let a professional serviceman replace the nozzle assembly.

2.Too low fuel injection pressure.

Causes:

(1) Lose pressure regulating screw.

(2) Deformation or break of the pressure regulating spring.

(3) Seizure of needle valves.

Correction:

Let a professional serviceman readjust the screw to the defined pressure and tighten the locknut.

Let a professional serviceman replace the injector spring.

Let a professional serviceman replace the nozzle assembly.

3.Too high fuel injection pressure.

Causes:

(1) Pressure regulating spring force too high.

(2) Seizure of needle valves.

(3) Block of the injection holes.

Correction:

Let a professional serviceman readjust the spring force.

Let a professional serviceman replace the nozzle assembly.

Let a professional serviceman check and clean the injection holes. Replace the injector if necessary.

4.Fuel leak at fuel injector.

Causes:

(1) Break of pressure regulating springs.

(2) Damage of needle valve facing.

(3) Seizure of needle valves.

(4) Deformation of tightening cap.

(5) Poor contact between nozzle and injector body.

Correction:

Let a professional serviceman replace springs.

Let a professional serviceman replace the nozzle assembly.

Let a professional serviceman replace the caps.

Let a professional serviceman repair or replace the nozzle assembly. Replace the injector if required.

5.Poor fuel atomization

Causes:

(1) decay of pressure regulating spring force or break of springs.

(2) Wear of fuel injector nozzle seat surface.

(3) There is impurity on the fitting plane of fuel injector nozzle assembly.

(4) Deformation or wear of nozzle assembly.

(5) Seizure of needle valve.

Correction:

Let a professional serviceman replace the springs.

Let a professional serviceman repair or replace the nozzle assembly.

Let a professional serviceman clean the nozzles.

Let a professional serviceman replace the nozzle assembly.

6.Fuel spray in kine or fuel dripping.

Causes:

(1) carbon deposit at nozzle holes and block of injection holes.

(2) Wear of needle valve seat surface.

(3) Seizure of needle valve.

Correction:

Let a professional serviceman clean the injection holes. Replace the nozzle assembly if necessary.

Let a professional serviceman replace the nozzle assembly.

7.The surface of needle valve is burn or in blue-black.

Causes:

The engine is overheating.

Correction:

Check the cooling system and do not over-load the engine for a long time. Let a professional serviceman check the nozzle assembly and make replacement if necessary.

Starlight Power provides 20kw to 2500kw diesel generator set with various brand, including Cummins, Perkins, Volvo, Deutz, Ricardo, Yuchai, SDEC, Weichai, etc. Contact us: sales@dieselgeneratortech.com or call us by mobile phone +8613481024441 ( same as WeChat number ).

The function of coolant in Cummins genset

Diesel generator is affected by its own diesel combustion during operation, which will lead to sudden rise of diesel engine temperature. In high temperature environment, it will not only affect the improvement of working efficiency of diesel generator, but also cause the occurrence of parts failure. Based on this, we need to cool the heating part, which involves the problem of adding coolant to the diesel engine cooling system. What is the effect of the coolant on the operation of diesel generator set?

1.Antifreeze

Under the condition of low temperature, the cooling system of diesel engine is not damaged. Generally speaking, the freezing resistance temperature of common coolant is that the freezing point is between 20 ℃ and 45 degrees below zero, and it is reasonable to choose according to the actual needs of different regions.

2.Anti boiling effect

Under high temperature, it is ensured that there will be no premature boiling. The boiling point of common coolant is 104 degrees to 108 degrees. When the coolant is added to the cooling system and the pressure is generated, the boiling point will be higher.

3.Antiseptic effect

Special coolant can reduce the corrosion of cooling system, thus avoiding the water leakage caused by corrosion of cooling system.

4.Rust prevention

High quality coolant can avoid the rust of cooling system, once the cooling system rust will lead to accelerated wear and reduce the heat conduction efficiency.

5.Antiscaling

Because the coolant is deionized water, it can avoid scaling and precipitation and protect the engine.

How to maintain Cummins diesel generators with coolant?

1.Heating water in winter

In cold winter, the engine is difficult to start. If cold water is filled before starting, it is easy to freeze in the water tank water chamber and water inlet pipe, which makes the water unable to cycle or even make the water tank crack. Hot water can be added to improve the engine temperature for easy start-up; on the other hand, the above freezing phenomenon can be avoided as far as possible.

2.Antifreeze should be of high quality

If there is no preservative in the antifreeze, it will seriously corrode the engine cylinder head, water jacket, radiator, water stop ring, rubber parts and other components, and produce a lot of scale, which will lead to poor heat dissipation and overheating of the engine. Therefore, we must choose the products of regular manufacturers.

3.Replenish soft water in time

After filling antifreeze in the water tank, if it is found that the liquid level of the water tank decreases, on the premise of ensuring no leakage, only clean soft water (distilled water is better), because the boiling point of ethylene glycol antifreeze is high, and the evaporation is the water in the antifreeze. It is not necessary to add antifreeze, but only soft water. It is worth mentioning: never add hard water without softening.

4.Discharge antifreeze in time to reduce corrosion

Whether it is ordinary antifreeze or long-term antifreeze, when the temperature becomes higher, it should be released in time, so as to prevent the corrosion of parts. Because the preservatives added in the antifreeze will gradually reduce or fail with the extension of service time, what’s more, some simply do not add preservatives, which will have a strong corrosive effect on the parts. Therefore, the antifreeze should be discharged in time according to the temperature, and the cooling pipeline should be thoroughly cleaned after the antifreeze is discharged.

5.Open the water tank cover when discharging coolant

If the cover of the water tank is not opened, part of the cooling water can flow out, but with the decrease of the water volume in the radiator, a certain degree of vacuum will be generated due to the sealing of the water tank, and the water flow will slow down or stop. In winter, the parts will be frozen due to unclean water discharge.

6.It is not advisable to discharge coolant immediately at high temperature

Before the engine stalls, if the engine temperature is very high, do not stop immediately to drain water. The load should be removed first to idle the engine. When the water temperature drops to 40-50 ℃, the water will be drained to prevent the temperature of the cylinder block, cylinder head and water jacket in contact with water from dropping suddenly due to sudden water discharge, and the temperature inside the cylinder block is still very high and the shrinkage is small. It is easy to make it easy to make it because of the excessive temperature difference between the inside and outside cracks are found in cylinder block and cylinder head.

7.Idle the engine after draining coolant in cold winter

In the cold winter, the engine should be started to idle for a few minutes after the cooling water in the engine is discharged. This is mainly because some water may remain in the water pump and other parts after the water is discharged. After the engine is started again, the residual water in the water pump and other parts can be dried by the body temperature, so as to ensure that there is no water in the engine and prevent the phenomenon of water leakage caused by the freezing of the water pump and the tearing of the water seal.

Above information is about coolant of Cummins diesel generators. When you doing maintenance, you can refer to the article, but should be done a professional person in order to ensure safety. Starlight Power also provide 20kw-2000kw Cummins diesel genset, now we have promotion activity, if you have purchase plan, please contact us for more details.

Introduction for removing air in oil circuit of 400kw genset

These days some users ask me about air in oil circuit of diesel generator set, they do not know how to solve it. Now Starlight Power shares the way to remove air in oil circuit. Hope it is helpful to you.

If diesel generator set is difficult to start, or shut down soon after starting, it can be judged that hat the air is mixed in the oil circuit, and the air in the oil circuit will bring a lot of obstacles to the operation, which will make the generator set difficult to start or shut down.

The main reason of air mixed in oil circuit is that at least one of the injector needle valve pairs of diesel generator is worn and the seal is not tight, which makes the combustion gas channeling through the injector into the oil return system, resulting in a large amount of gas in the oil return system.

After occur this, if return oil of injector is directly return to fuel tank, the direct impact on the operation of diesel generator setis relatively small. But if the return oil of the injector is connected to the fuel filter, it will have a serious impact on the operation of the diesel generator. Therefore, after occur this problem, should first check all injectors, and repair or replace needle valve couple.

How to find the leakage point in the pipeline and stop it?

The fuel supply system of diesel generator can be divided into low pressure oil circuit and high pressure oil circuit. The low-pressure oil circuit refers to the oil circuit from the fuel tank to the low-pressure oil cavity of the fuel injection pump, and the high-pressure oil circuit refers to the oil circuit from the plunger cavity of the high-pressure pump to the fuel injection nozzle. Here we talk about leakage point in low pressure oil circuit.

The following is the method to determine the leakage point of low pressure oil circuit.

Method 1: Exhaust the air in the oil circuit and find out the leakage of diesel oil after starting the engine.

Method 2: Loosen the bleed screw of the engine fuel injection pump and pump oil with the manual oil pump. If it is found that the bleed screw begins to discharge a large amount of bubble oil flow, and the bubble still does not disappear after repeated hand pumping, it can be determined that there is a leakage point in the negative pressure oil circuit from the oil tank to the oil delivery pump. The pipeline should be taken down, then the pressure gas should be introduced and placed in the water to find out where the bubble is.

In addition to the problems of the pipeline, the various gaskets at the pipeline joints will also leak due to improper installation, deformation, aging and damage, and become leakage points. Before the detailed inspection of the pipeline, these nodes should be inspected first.

How to remove air in oil circuit of diesel generators?

1.Routine Method

Use a screw driver or spanner to loosen any air release screw on both sides of the fuel injection pump for several turns, continuously press the manual oil pump by hand until the diesel oil is discharged, and there are no bubbles and squeaking sound.Then tighten the bleed screw and press the manual oil pump back to its original position, as shown in Figure 1-1. The exhaust method of unit pump oil system is shown in Figure 1-2.

2.Non-routine method (emergency case)

1)If you don’t have a suitable screw driver or wrench to open the bleed screw on the fuel injection pump, you can turn on the manual oil pump first, then loosen any connection from the diesel filter to the fuel injection pump, then repeatedly press the manual oil pump to the joint to discharge the unobstructed and bubble free oil flow, then press the manual oil pump while tightening the joint, and finally press the manual oil pump back to its original position.

2)When there is no wrench to loosen the pipe joint, the manual oil pump can be pressed repeatedly, unit the oil pressure of the low-pressure oil circuit between the oil transfer pump and the injection pump is high enough, the fuel flows into the fuel return pipeline from the relief valve, the gas in the oil circuit will be discharged from the overflow.

3)If you need to exhaust the air in the oil circuit, you can first loosen the bleed screw on the injection pump or loosen any connector between the diesel filter and the injection pump. Then start the driving mechanical oil pump, the leakage point will spray out the fuel without bubbles. At this time, tighten the loosen the above leakage point to exhaust the air.

If air is mixed in the oil circuit of the diesel generator set, the air will affect the operation of the diesel generator set, so regular inspection and maintenance is very necessary, and the air in the oil circuit should be found and remove in time.

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