Details
Cummins NTA855-C360 Construction Diesel Engine Assembly
HekoPower supplies complete genuine CCEC Cummins NTA855-C360 diesel engines, long blocks, and replacement power units for heavy construction equipment worldwide. The NTA855-C360 is a heavy-duty 14-litre 6-cylinder turbocharged and aftercooled mechanical diesel engine engineered specifically for high-load industrial machinery. Rated at 360 horsepower (268 kW) at 2100 RPM, this engine provides the high low-end torque and rugged reliability needed for continuous earthmoving and heavy civil engineering operations.
Built by Chongqing Cummins Engine Co., Ltd. (CCEC) under licensed Cummins engineering, the NTA855 series remains one of the most trusted powerhouses in global construction and mining. Below is a detailed technical analysis, equipment fitment guide, maintenance strategy, and direct replacement advice to help equipment owners and fleet managers evaluate the Cummins NTA855-C360 engine.
Tech Specs of Cummins NTA855-C360
General Engine Data
Engine Model: Cummins NTA855-C360
Type: 6 Cylinders in Line
Displacement: 14 L
Bore * Stroke: 140 * 152
Overall Dimension: 1389mm*914mm*1298mm
Net Weight (with flywheel & alternator): 1348 Kg
Key Performance Data
Rated Power: 269 kW/360HP
Rated Speed: 2100 rpm
Max Torque/Speed: 1464 N.m @ 1400 rpm
Fuel Consumption @ Rated Power: 213 g/Kw.h
Idle Speed: 600 rpm
Torque/Rated Speed: 1223 N.m @ 2100 rpm
Output/Max Torque: 215 kW/360HP @ 1400 rpm
More Technical Data
Certification: Euro II
Aspiration: Turbocharged & Charge Air Cooled
Fuel System: Direct Injection PT Pump, STC
Compression Ratio: 14.5:1
Electrical System (Starter Motor/Alternator): 12V/24V
Lowest Starting Temp Without auxiliary system: -12℃/-25℃
Cooling Method: Water cooled
Engine Cooling Fluid Volume: 20.8 L
Heavy Machinery Applications and Field Scenarios
Different machinery demands specific power delivery profiles. Understanding where the NTA855-C360 performs best ensures proper application matching.
Primary Machinery Fitment: Shantui SD32 Bulldozer
The primary field application for the NTA855-C360 is the Shantui SD32 crawler bulldozer. In this application, the engine connects directly to a torque converter and power shift transmission.
Earthmoving requires sustained high torque at reduced speeds when pushing hard rock, clay, or overburden. The NTA855-C360 maintains constant power output without overheating under prolonged heavy blade resistance. The mechanical governor responds instantly to load shifts, keeping blade speed steady across varying soil densities.
Secondary Earthmoving Equipment: Komatsu D155 Class Machines
Many operators choose the CCEC Cummins NTA855-C360 as an OEM or replacement engine for 30-ton to 40-ton crawler tractors and heavy excavators. Its mounting points and flywheel housings conform to SAE 1 standards. This standardization allows simple drop-in conversion for legacy machines originally powered by older NT855 or Komatsu S6D155 units.
Heavy Industrial Duty: Rotary Drilling Rigs and Mining Pumps
Beyond bulldozers, the NTA855-C360 serves as a prime power unit for heavy rotary drilling rigs, high-pressure slurry pumps, and stationary air compressors. Rotary drilling demands steady RPM under fluctuating torsional stress. The thick engine block structure and robust forged crankshaft absorb torsional vibrations produced by deep foundation drilling.
Technical Comparisons: NTA855-C360 vs. Alternative Engines
Choosing between mechanical and electronic engines requires balancing fuel efficiency against field maintainability.
Mechanical PT Fuel Injection vs. Electronic Common Rail Systems
Modern electronic common rail engines offer slightly lower exhaust emissions and minor fuel savings. However, they rely heavily on delicate wiring harnesses, electronic sensors, and clean low-sulfur fuel.
The NTA855-C360 uses the purely mechanical Cummins PT fuel system. It tolerates variable fuel quality and harsh job site environments. Repairs require standard mechanical tools rather than costly diagnostic software. Field mechanics can adjust or service injectors without electronic recalibration.
NTA855-C360 vs. Cummins QSM11 and KTA19 Power Units
Compared to the 11-litre QSM11, the 14-litre NTA855-C360 provides a larger engine displacement. This extra volume translates to lower thermal stress on internal components when operating continuously at 360 horsepower.
Compared to the larger 19-litre KTA19 series, the NTA855-C360 offers a lighter, more compact footprint. It fits easily into standard engine bays without requiring major chassis or engine frame modifications.
Engine Replacement, Rebuilding, and Installation Guidelines
When an aging construction engine suffers severe wear or crankcase damage, equipment owners face a choice between rebuilding the old block or purchasing a new complete assembly.
Evaluating Rebuild vs. Complete Assembly Swap
In-frame overhaul kits replace pistons, rings, liners, and bearings. However, rebuilding an old engine block does not address micro-fractures in the cylinder head, gear train wear, or internal oil gallery corrosion.
Replacing the worn unit with a new complete CCEC Cummins NTA855-C360 engine assembly eliminates hidden component failure risks. A pre-tested complete engine includes the turbocharger, PT fuel pump, injectors, water pump, and oil cooler. Installing a pre-assembled unit cuts equipment downtime from weeks to a few days.
Installation Checklist for Engine Drop-In
Check flywheel housing alignment and drive coupling splines before mounting. Ensure proper damper clearances.
Verify radiator cooling capacity. The 360 HP engine requires adequate coolant flow rate and clean radiator fins to prevent thermal degradation under heavy load.
Inspect air intake ducting and replace air filters. Dust ingress is the primary cause of premature liner and ring wear in earthmoving applications.
Flush the external oil cooler lines and fuel supply system to remove old debris before initial engine startup.
Maintenance Strategies for Long Service Life
Proper maintenance routines extend the service life of a Cummins NTA855 engine beyond 15000 operating hours.
Oil, Filter, and Coolant Service Intervals
Change engine oil and primary lube filters every 250 operating hours. Use high-grade heavy-duty diesel engine oil formulated for turbocharged engines.
Maintain coolant chemistry using Supplemental Coolant Additives (SCA). These additives prevent cylinder liner pitting caused by cavitation during high-load combustion cycles.
Replace fuel filters and drain water separators weekly to prevent water contamination in the PT pump and injectors.
Overhead Valve and Injector Adjustments
Inspect valve clearances and PT injector overhead settings every 1500 operating hours. Proper injector adjustment prevents excessive black smoke, high exhaust temperatures, and fuel dilution in the crankcase oil.
Check turbocharger shaft play and intake piping clamps regularly to maintain boost pressure and prevent air leaks.
Cummins NTA855-C/P Series, original products from Chongqing Cummins Engine Plant(CCEC). This series mainly includes NTA855-C250, NTA855-C280, NTA855-C310, NTA855-C335, NTA855-C360, NTA855-C400, NTA855-C450, NTA855-P300, NTA855-P360, NTA855-P400, NTA855-P470.
Frequently Asked Questions
What is the exact output rating and fuel consumption for the Cummins NTA855-C360?
The engine is rated at 360 HP (268 kW) at 2100 RPM with a peak torque of 1380 Nm at 1500 RPM. Specific fuel consumption is approximately 205 g/kWh to 210 g/kWh at full load rating.
Is the CCEC Cummins NTA855-C360 a direct drop-in replacement for older NTA855-C335 engines?
Yes. The physical dimensions, mounting feet, flywheel housing, and shaft connections are identical across the NTA855 platform. Upgrading from a lower horsepower variant like the C335 to the C360 provides additional working power without modifying chassis mounting structures.
Why choose a new complete engine assembly instead of rebuilding the existing engine block?
A new complete engine assembly reduces machine downtime significantly. It includes all major external systems pre-calibrated and factory-tested, preventing unexpected failures from old auxiliary components like worn oil pumps or aging turbochargers.
What are the shipping specifications for an export NTA855-C360 engine?
A complete engine unit wrapped for international sea freight weighs approximately 1300 kg with export wooden crate packaging. Standard dimensions average 1.6 meters in length, 1.1 meters in width, and 1.5 meters in height.
