General data of Cummins 4BT3.9-C105 Construction Machinery Engine
Engine Mode	Cummins4BT3.9-C105
Type	4 cylinder in line
Displacement	3.9L
Bore&Stroke	102×120 mm
Dry Weight	338 KG
Dimension(LWH)	778634912(mm)
Center of gravity from front face of block	262 mm
Center of gravity above crankshaft centerline	160 mm

Technical data of Cummins 4BT3.9-C105 Construction Machinery Engine
Aspiration	Turbocharged
Fuel System	A Pump/RSV Governor Regulation 15%
Coolant capacity-engine only	7.9 litre
Minimum ldle speed	750 RPM
Maximum Speed(10%rated load)	3200 RPM
Compression ratio	16.5.1
Piston Speed
Firing Order	1-3-4-2

Performance Date of Cummins 4BT3.9-C105 Construction Machinery Engine
Rated Output	77KW/105HP
Rated Speed	2800RPM
Max Torque/Speed	330N.m/1500RPM
Torque/Rated Speed	263N.m/2400RPM
Minimum Fuel Consumption/speed	227g/KW.h/1500RPM
Maximum Fuel Consumption/speed	270g/KW.h/2800RPM
Fuel Consumption/rated speed	270g/KW.h/2800RPM

The above is general technicial information of Cummins 4BT3.9-c105 industrial application Engine, we also can supply the marine engine unit with PTO and pump set. it is also for us to supply the Cummins 4BT3.9-c105 genuine parts and engine units with clutch ASSY.

. Light/Small Construction Machinery Engines (< 200HP)
Suitable for small excavators, forklifts, skid steer loaders and other equipment.

Series B (3.9L - 6.7L)
Models: B3.9, B4.5, B6.7

Power range: 60 to 200 HP

Features: Compact structure, low fuel consumption, strong adaptability

Application:

Komatsu PC60/PC78 Excavators (B3.9)

Bobcat B4.5 Skid Steer Loader

2. F2.8 / F3.8 (2.8L - 3.8L)
Model: F2.8, F3.8

Power range: 50 to 170 HP

Features: Lightweight design, suitable for compact devices.

Application:

XCMG Small Loader (F3.8)

Hyundai HX series mini excavators

II. Medium-sized Construction Machinery Engines (200 - 400 HP)
Suitable for medium-sized excavators, loaders, rollers, etc.

1. L Series (8.9L - 9.3L)
Models: L9, L9.3

Power range: 250 to 400 HP

Features: Low noise, high reliability

Application:

Caterpillar (CAT) M313/M315 Excavators (L9)

LIUGONG 856H Loader

2. X Series (11L - 12L)
Models: X11, X12

Power range: 350 to 450 HP

Features: Modular design, convenient for maintenance.

Application:

Sany Heavy Industry SY500H Large Excavator (X12)

Volvo EC480 Excavator

III. Heavy/Large Construction Machinery Engines (>400HP)
Suitable for mining trucks, large excavators, cranes, etc.

X15 Series (15L)
Model: X15

Power range: 450 - 650 HP

Features: High torque, long service life

Application:

Komatsu HD785 mining truck

Liebherr R 9800 large excavator

2. QSK Series (19L - 60L)
Models: QSK19, QSK38, QSK60

Power range: 600 to 3000+ HP

Features: Super strong power, suitable for extreme working conditions.

Application:

XCMG XE4000 Mining Excavator (QSK19)

Caterpillar (CAT) 797 mining truck (QSK60)

IV. New Energy/Environmental Protection Models
1. B6.7 Hybrid (Hybrid Power)
Suitable for energy-saving construction machinery, such as hybrid power excavators.

2. Electric Power System (AEOS)
Future trend, applicable to port machinery, electric loaders, etc.

V. Emission Standards for Cummins Construction Machinery Engines
Tier 4 Final / Stage V (European and American Markets)

National IV / National V / National VI (Chinese market)

Indian BS-IV / BS-VI

VI. How to Choose the Right Cummins Engine?
Based on the type of equipment (excavators, loaders, mining trucks, etc.)

Power requirement (HP or kW)

Emission regulations (Tier 4, National IV, etc.)

Fuel type (diesel, natural gas, hybrid)