Cummins 4BT3.9 Engine is a small horsepower engine which the power ranges from 80HP to 140HP. In mini equipment industry, Cummins 4BT3.9 Engines are used in Construction Machinery, Automotive Equipment, Generator Power Unit Marine Industry. The engine was designed without cylinder liner, intake/exhaust valve insert, valve guide, cam shaft bushing, so Cummins 4B3.9 engine has less parts when comparing with the other brand engines. In order to meet different market / equipment needs, Cummins developed different engine models. While according to the type of aspiration, these engines are separated as followings:
Combine with the technology from Cummins factory, we provide a few solutions for your machinery. Not only Cummins 4BT3.9 engine assy but also 4BT3.9 long block engine will be your smart choice. So that you will get your equipment into work in a very short breakdown time.
CO-MACH offer the New Cummins 4BT3.9 Engines and our new engines will be built with the following parts:
CO-MACH manufacture Cummins 4BT3.9 Long Block Engine which Contains the following parts:
Long Blocks do not apply the outer fittings. In this case, CO-MACH long blocks don’t include the followings: Fuel pumps, Turbochargers, Turbo Drains, Fuel Lines, Injectors, Lift pumps, Air Compressors, Starters, Alternators, Flywheels, Flywheel Housings, Filters etc.
In automotive industry, Cummins 4BT3.9 engines are popular for Passenger Bus, Coach, School Bus, RV (Recreational Vehicle), Shuttle Bus Airport Airfield Bus, Airport Luggage Cart, People Mover etc. The Cummins 4BT3.9 engines are suit for Chinese Vehicles like YUTONG, KINGLONG, DONGFENG, JAC, HIGER … In general, Cummins 4BT3.9 automotive engine models are as below:
Engine Model | Emission Standard | Rated Power/Speed (KW/rpm) |
Peak Torque (N.m/rpm) |
Aspiration |
4BTAA3.9-125 EQB125-20 |
Euro II | 92@2800 | 410@1500 | Turbocharged, Aftercooled |
4BTAA3.9-140 EQB140-20 |
Euro II | 103@2700 | 502@1500 | Turbocharged, Aftercooled |
In industrial market, Cummins 4BT3.9 Engines are applied to the small horsepower equipment like: Excavator, Loader, Bulldozer, Skid Steer, Roller, Tractor, Cranes, Forklift, Boom lift, Scissor Lift, Street Sweeper, Compressor … In China, the 4BT3.9-C engines are supplied to DOOSAN Shanghai, LIUGONG, LIU-TECH Air Compressor, ZHENGTAI, SANY, DYNAPAC, XGMA … Cummins 4BT3.9 Industrial engines are shown as below:
Engine Model | Emission Standard | Rated Power/Speed (KW/rpm) |
Peak Torque (N.m/rpm) |
Aspiration |
4BTA3.9-C80-II | Euro II | 60@2200 | 350@1500 | Turbocharged, Aftercooled |
4BTA3.9-C100-II | Euro II | 74@2200 | 380@1500 | Turbocharged, Aftercooled |
4BTA3.9-C110-II | Euro II | 82@2200 | 460@1400 | Turbocharged, Aftercooled |
4BTA3.9-C125-II | Euro II | 93@2300 | 475@1500 | Turbocharged, Aftercooled |
4BTA3.9-C130-II | Euro II | 97@2500 | 475@1500 | Turbocharged, Aftercooled |
In emergency situation, the Fire Emergency pump should be given a reliable and durable power, So that the emergency situation can get efficiently controlled. Cummins 4BT3.9 Engines act as an important part of power source from fire emergency equipment. Generally, the Cummins 4BT3.9 Engine models for Fire Emergency pumps are shown as below:
Engine Model | Rated Power/Speed (KW/rpm) |
Fuel Pump | Aspiration |
4BTA3.9-P80 | 58@1500 | Mechanical Pump | Turbocharged, Aftercooled |
4BTA3.9-P90 | 67@1800 | Mechanical Pump | Turbocharged, Aftercooled |
4BTA3.9-P100 | 70@1500 | Mechanical Pump | Turbocharged, Aftercooled |
4BTA3.9-P110 | 80@1800 | Mechanical Pump | Turbocharged, Aftercooled |
Currently, in order to supply the power to the marine vessels, diesel engine is the first choice of the main engine, generator engine and emergency generator engine in marine industry. The marine Tug boat as well as supply boat, Bunkering vessels, Ferries, Fishing boat choose Cummins 4BT3.9 Engines as their power supply driven engine. Generally, Cummins 4BT3.9 Marine engines models are as followings:
Engine Model | Rated Power/Speed (KW/rpm) |
Standby Power/Speed (KW/rpm) |
Aspiration |
4BT3.9-GM47 | 47@1500 | 52@1500 | Turbocharged, Aftercooled |
4BT3.9-GM55 | 55@1500 | 61@1500 | Turbocharged, Aftercooled |
4BT3.9-GM65 | 65@1800 | 72@1800 | Turbocharged, Aftercooled |
In fact, Cummins engines are known as their reliability and durability. Cummins 4BT3.9 engines make your continuous power unit or a standby power unit working smoothly. Generally, Cummins 4BT3.9 engines models for generator sets are as followings:
Engine Model | Rated Power/Speed (KW/rpm) |
Standby Power/Speed (KW/rpm) |
Governor Type |
4B3.9-G1 | 24@1500 | N/A | Mechanical Governor |
4B3.9-G1 | 27@1500 | N/A | Mechanical Governor |
4B3.9-G2 | 24@1500 | 30@1800 | Electronic Governor |
4B3.9-G2 | 27@1500 | 33@1800 | Electronic Governor |
4BT3.9-G1 | 36@1500 | N/A | Mechanical Governor |
4BT3.9-G1 | 40@1500 | N/A | Mechanical Governor |
4BT3.9-G1 | 86@1500 | N/A | Mechanical Governor |
4BT3.9-G1 | 92@1500 | N/A | Mechanical Governor |
The Engine 4BT3.9-C105 is for small excavator
Fuel Pump:
Fuel Injector:
Turbocharger:
Water Pump:
L.O Pump:
Find the Spare Parts for Your Engine
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