About Cummins models
Cummins diesel generator sets are divided into joint venture Dongfeng Cummins, joint venture Chongqing Cummins, and original imported Cummins. The power range of Dongfeng Cummins is between 20kw and 200kw. The common models are: 4B3.9-G1,4BT3.9-G1,4BTA3.9-G2,6BT5.9-G1,6BTA5.9-G2,6CTA8.3-G2,6CTA8.3-G3,6LTAA8.9-G2
The power range of Chongqing Cummins is between 200kw-1350kw. The common model is NT855-GA, NTA855-G1A,MTAA11-G3,NTA855-G2A,NTAA855-G7A,KTA19-G3,KTA19-G4,KTAA19-G5,KTAA19-G6A,KTA38-G2,KTA38-G2A,KTA38-G5,KTA38-G9,KTA50-G3,KTA50-G8,KTA50-GS8,KTA50-G9,KTA50-G15
The original imported Cummins power range is between 120kw and 1800kw. The common model is KTA19-G3, KTA19-G4,VTA28-G5,VTA28-G6,KTA38-G5,KTA38-G9,KTA50-G3,KTA50-G8,QSK60-G3,QSK60-G4
Maintenance
Maintenance is the key to reducing usage costs. A diesel engine needs to be regularly maintained according to the maintenance schedule in order to maintain effective operation. Preventive maintenance is the easiest and most economical way of maintenance. It enables the maintenance department to work at the appropriate time. The maintenance cycle and content of different series and models of engines may vary slightly. Please refer to the engine maintenance manual for specific details. The following briefly introduces the maintenance cycle and content of N and K series engines as examples.
(1) A-level maintenance inspection (daily inspection)
Produce daily engine operation reports and provide them to the maintenance department.
① Report content: 1) Whether the oil pressure is low; 2) Is the power insufficient; 3) Is the temperature of the cooling water or engine oil abnormal; 4) Is the engine sound abnormal; 5) Is there smoke; 6) Whether the coolant, fuel or engine oil is over consumed; 7) Is there any leakage of coolant, fuel or oil.
② Check the engine: 1) Check the engine oil level; 2) Check the engine coolant level. ③ Check the water pump belt; ④ Check the marine gearbox; ⑤ Check the engine for leaks, bumps, looseness, and other issues.
(2) A-level maintenance inspection (weekly inspection)
① Repeat daily checks every week Check the air filter and intake resistance: Clean or replace the air filter element Release the accumulated water from the air reservoir Release sediment from the fuel tank.
(3) B-level maintenance inspection
Cycle: using chart method or 250 hours, 6 months, or a mileage of 16000 kilometers. During each B-level maintenance inspection, all A-level inspection items must be completed, in addition to the following items:
1) Change engine oil: ① Start the engine to reach operating temperature, then stop the engine and drain the oil; ② Install the drain plug; ③ Check the oil dipstick to make the oil level reach the "H" mark; ④ Start the engine and visually inspect for oil leakage; ⑤ Stop the machine for 15 minutes and check the oil level.
2) Replace the filter: ① Full flow oil filter; ② Bypass type oil filter; ③ Fuel filter.
3) Check the coolant: Check the concentration of DCA in the engine coolant, replace the core and add DCA4 additive if necessary
4) Check the oil level.
5) Clean or replace the crankcase ventilator and air compressor ventilator.
6) Check the zinc plug.
(4) C-level maintenance inspection
The maintenance and inspection cycle is 1500h, 1 year, or 96000km of mileage. During each C-level maintenance check, all A-level and B-level inspection items must be completed, in addition to adjusting the fuel injector stroke and valve clearance.
① Cold tuning ": The engine should be shut down for at least 4 hours at the ambient temperature to be adjusted to reach a stable temperature; ② Hot adjustment: When the engine oil temperature is above 99 ℃, run it for at least 10 minutes, or immediately adjust the fuel injectors and valves after reaching normal oil temperature.
The adjustment of the fuel injector stroke and valve clearance of Cummins engines must be completed by specially trained personnel.
(5) D-level maintenance inspection
The maintenance and inspection cycle is 4500h, 2 years, or the mileage is 288000km. During each D-level maintenance inspection, all A-level, B-level, and C-level inspection items should be completed, in addition to the following items: ① Clean and calibrate the fuel injectors and fuel pumps. ② Check, repair or replace the turbocharger, shock absorber, and air compressor Repair or replace the fan shaft, water pump belt tensioner assembly, and water pump.
(6) Seasonal inspection
1) Spring: ① Clean the engine with steam; ② Tighten the installation bolts; ③ Check the axial clearance of the crankshaft; ④ Check the heat exchanger plugs annually or as needed.
② Autumn: ① Clean and flush the cooling system; ② Replace the hose that needs to be replaced; ③ Clean the electrical connectors and check the battery.
Mining market
Cummins engines can meet the power needs of small construction machinery to large equipment to the maximum extent possible, providing ideal power for various types of construction machinery such as excavators, loaders, rollers, graders, pavers, air compressors, cranes, and forklifts.
Cummins is a leading global manufacturer of mining engines, with the widest product line in the industry, covering a displacement range of 15-78 liters and a power range of 600-3500 horsepower. It is widely used in various mining equipment, from rock drills to the world's largest mining trucks.
Agricultural Market
Cummins agricultural engines have a wide product line, with displacements ranging from 1.4-15 liters and a power range of 31-600 horsepower. They use mechanical and fully electronic control methods, with excellent power, reliability, and fuel economy, meeting the strictest European and American off highway motor equipment emission standards (Tier 3 and above) today
Marine engine market
Cummins achieved success in the marine engine market from the beginning of its establishment. The first engine we successfully designed and manufactured was for ships, and we did not stop moving forward. In fact, between 1919 and 1934, more than half of our products were used for ships. From 76BHP to 2000BHP (57-1492KW), Cummins marine engines are used in various types of ships worldwide, including trawling boats, ferries, yachts, workboats, tugboats, fishing boats, firefighting boats, and passenger ships.
Oilfield market
Cummins is a world leading manufacturer of power equipment for oil and gas fields, providing comprehensive power solutions for drilling, well repair, and production equipment in oil and gas fields, including engines, generator sets, mobile power stations, filters, fire pumps, and exhaust aftertreatment devices. Cummins oil and gas field engines, including mechanical and fully electronic 1.4-liter to 78-liter diesel engines and 5.9-liter to 91-liter natural gas engines, meet the strictest highway (EPA07, Euro III/Euro IV) and off highway equipment (Tier 2/Tier 3) emission standards today. They are widely used in equipment such as oil drilling rigs, workover rigs, fracturing trucks, pump sets, and gas compressor sets.
Railway Market
With the rapid development of railway transportation industry, improving operating speed, increasing passenger capacity, and reducing operating costs have become the most critical issues in railway operation, and the basis for solving these problems lies in improving the performance of vehicle engines. To meet the above requirements, Cummins has developed and produced a series of engine products suitable for the railway transportation industry. These products have the following characteristics: high power, high durability, low emissions, and low lifetime operation and maintenance costs of the engine. The power range of the engine series is 68-3500 horsepower, and all of them are electronically controlled, which can meet the second and third stage (Tier 2/Tier 3) emission standards of European and American off-road mobile equipment, fully meeting the operator's requirements for environmental protection.
Power products
The product line of Cummins Power Division includes diesel and alternative fuel generator sets (2.5 kW~2.7 MW), AC generators (0.6 KVA~30000 KVA), unit engines, control systems, transfer switches (40 amps~3000 amps), and switchgear, which are widely used in office buildings, hospitals, factories, municipalities, power plants, universities, recreational vehicles, yachts, and household power sources.
Precautions
a. The Cummins starter motor should run for no more than 30 seconds each time, and the time interval for restarting is 2 minutes. b. The lubricating oil pressure should reach 70KPa within 15 seconds after starting, otherwise check the oil level immediately. c. After starting, idle for 3-5 minutes before adding load, otherwise the bearing will experience a momentary shortage of fuel supply. d. Idle speed should not exceed 10 minutes, otherwise adverse phenomena such as carbon buildup in the combustion chamber and oil leakage from the Cummins engine turbocharger may occur. e. The water temperature of Cummins engine should not be lower than 60 ℃, otherwise fuel will enter the engine oil and damage lubrication. Empty acceleration can be used to increase the water temperature. f. After starting in winter, keep idling until the water temperature gauge pointer rotates or enters operation after 10 minutes. Pay attention to whether the oil pressure gauge meets the requirements while observing the water temperature gauge. When using starting aid fluid in winter, a spray with a measuring hole must be used.
(2) Basic operating requirements for Cummins engines
a. During the operation of Cummins engines, it is necessary to regularly observe the instruments: the water temperature should be between 74 ℃ and 91 ℃; The oil pressure should be greater than 70KPa at idle and within the range of 276-517kPa above 1200r/min. b. If the Cummins engine overheats, the load should be reduced during operation. If it still overheats after running under reduced load for a period of time, the machine should be stopped to check for faults. c. During the operation of Cummins engines, close attention should be paid to any of the following changes in the engine. If any of them suddenly change, it is likely to be a sign of a malfunction. Please check and repair them in a timely manner.
① Poor engine fire extinguishing or ignition; ② Vibration situation; ③ The engine has abnormal noise; ④ Sudden changes in engine working pressure and temperature; ⑤ The exhaust smoke of the engine is too high; ⑥ Insufficient engine power; ⑦ Increased oil consumption; ⑧ Increased fuel consumption; ⑨ Fuel, oil or water leakage.
(3) Cummins engine operating range
a. When the Cummins engine is below the maximum torque speed, full throttle operation should not exceed 30 seconds, otherwise it will shorten the engine's overhaul life and may seriously damage the engine. Cummins engines work best above the maximum torque speed point, so it is recommended to operate Cummins engines within this range. b. Under no circumstances or in any environment should Cummins engines operate beyond the maximum idle speed.
(4) Cummins engines operating in cold environments
When operating the engine in extremely cold environments, special oil, fuel, and coolant should be used.
(5) Cummins engine shutdown
a. Cummins engines are required to idle for 3-5 minutes before shutting down. Because idling the diesel engine for 3-5 minutes before each shutdown can allow the engine oil to remove heat from the combustion chamber, bearings, and oil seals, especially from the turbocharger. If the machine suddenly stops, there is a high possibility of the bearings and oil seals biting. b. The purpose of stopping the Cummins engine can be achieved by cutting off the current of the fuel pump solenoid valve.
