Diesel Engine

Diesel Engines for Power, Industrial & Marine Applications

Milestone Engine supplies diesel engine solutions for generator sets, industrial equipment, construction machinery, agricultural applications and marine power systems, with configuration and technical support available for OEMs, distributors, EPC contractors and equipment manufacturers.

Technical Specifications

Model	HD6126ZLC2	HD6126ZLC5	HD6126ZLC6	HD6126IZLC	HD6126IZLC1
Engine Type	Water-cooled, In-line, Four-stroke, Dry Cylinder Liner, Direct Injection	Water-cooled, In-line, Four-stroke, Dry Cylinder Liner, Direct Injection	Water-cooled, In-line, Four-stroke, Dry Cylinder Liner, Direct Injection	Water-cooled, In-line, Four-stroke, Dry Cylinder Liner, Direct Injection	Water-cooled, In-line, Four-stroke, Dry Cylinder Liner, Direct Injection
Rated Power / Speed	176kW /1500rpm 176kW /1800rpm	208kW /2100rpm 205kW /1800rpm	225kW /2100rpm	258kW /1800rpm	288kW /1800rpm
Air Intake	Turbocharged & Intercooled	Turbocharged & Intercooled	Turbocharged & Intercooled	Turbocharged & Intercooled	Turbocharged & Intercooled
Number of Cylinders	6	6	6	6	6
Bore × Stroke (mm)	126 × 130	126 × 155	126 × 155	126 × 155	126 × 155
Compression Ratio	16:1	16.5:1	16.5:1	16.5:1	16.5:1
Exhaust Temperature	≤550°C	≤550°C	≤550°C	≤550°C	≤550°C
Firing Order	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4
Fuel Consumption	≤215 g/kWh	≤197 g/kWh	≤197 g/kWh	≤197 g/kWh	≤197 g/kWh
Displacement	9.726 L	11.6 L	11.6 L	11.6 L	11.6 L
Cooling Method	Closed Water Cooling	Closed Water Cooling	Closed Water Cooling	Closed Water Cooling	Closed Water Cooling
Rotation Direction	Counterclockwise (Viewed from Power Output End)	Counterclockwise (Viewed from Power Output End)	Counterclockwise (Viewed from Power Output End)	Counterclockwise (Viewed from Power Output End)	Counterclockwise (Viewed from Power Output End)
Lubrication Method	Pressure & Splash Combined	Pressure & Splash Combined	Pressure & Splash Combined	Pressure & Splash Combined	Pressure & Splash Combined
Starting Method	Electric Start	Electric Start	Electric Start	Electric Start	Electric Start
Net Weight	950 kg	1000 kg	1000 kg	1000 kg	1000 kg

Main Components

Component	Function
Cylinder Block	Provides a rigid structure to support all major engine components and withstand high combustion pressure.
Cylinder Head	Forms the combustion chamber and supports the intake, exhaust, and cooling systems.
Pistons	Compress air and convert combustion energy into mechanical force.
Connecting Rods	Transfer piston force to the crankshaft for efficient power transmission.
Crankshaft	Converts reciprocating motion into rotary power to drive connected equipment.
Camshaft	Controls valve timing to improve combustion efficiency and engine performance.
Fuel Injectors	Deliver fuel precisely to improve power output, fuel economy, and combustion efficiency.
Intake & Exhaust Valves	Control airflow to ensure efficient combustion and stable engine operation.

How to Specify an Industrial Diesel Engine

Power & Torque:Horsepower alone is not enough. Review rated power, rated speed, peak torque, torque curve, and duty rating. Torque characteristics are especially important for frequent load changes or high starting loads.

Fuel Consumption:Fuel is often the largest operating cost. Compare fuel consumption under your actual operating conditions, not just maximum power. Annual fuel cost = consumption × hours × local diesel price—essential for comparing real operating economics.

Duty Cycle:Specify actual use:
• Standby: Short-duration emergency operation.
• Prime Power: Regular or continuous primary power.
• Variable Load: Frequent load changes (e.g., construction, industrial equipment).
• Continuous Duty: Long periods with stable load.

Choose the Engine by Application, Not Just Horsepower

Different equipment places very different demands on a diesel engine.

Generator Power:

Evaluate prime or standby duty, rated kW, operating speed, fuel consumption, load response, cooling system, and alternator compatibility.

Construction Machinery:

Excavators, loaders, compressors, and heavy equipment require engines capable of handling variable loads, high torque demand, and demanding working environments.

Agricultural Equipment:

Often operates seasonally under significant load. Fuel economy, ease of maintenance, and parts availability directly affect operating costs.

Marine Equipment:

Requires attention to cooling arrangements, continuous-duty capability, installation space, propulsion requirements, and marine operating conditions.

Industrial Equipment:

For pumps, compressors, and other industrial machinery, selection should be based on actual duty cycle, torque characteristics, and operating environment.

Build & Durability — Why It Lasts

Cast-iron block:High thermal stability and rigidity under continuous load — preferred over aluminium for industrial duty.

Replaceable wet liners:Overhaul without replacing the block; lower major-repair cost and downtime.

Forged crankshaft:Induction-hardened journals endure high dynamic torque loads.

Customized service

The customized configurations supported by Milestone include:
engine configuration, power level, control system, installation layout, fuel system, cooling configuration, customer brand, nameplate, packaging and project documents.

Manufacturing & Quality Verification

Material & machining:

Block, crank, head, rod inspected for material/hardness; CNC tight tolerances for sealing & durability.

Assembly inspection:

Valve clearance, injection timing, bearing clearance and torque checked during build.

Performance testing:

Start, oil pressure, cooling, exhaust temp, vibration, noise and leakage verified on every unit.

Full-load testing:

Each engine runs at rated load to confirm power, fuel use and continuous-run stability before shipment.

From Engine Selection to Delivery

A professional engine procurement process should be straightforward:

01 — Application Review

Tell us what equipment the engine will power.

02 — Technical Matching

Confirm power, speed, dimensions, cooling, fuel and control requirements.

03 — Configuration

Finalize the engine specification and optional equipment.

04 — Commercial Quotation

Confirm quantity, payment terms and delivery requirements.

05 — Production & Inspection

Manufacture and verify the approved configuration.

06 — Documentation

Prepare technical and shipping documents.

07 — Export Packaging

Protect the engine for the selected transportation method.

08 — After-Sales Support

Provide technical guidance and spare-parts support after delivery.

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Packaging & Global Shipping

Diesel engines are prepared according to equipment size, weight and destination.

Packaging

• Steel base or reinforced support
• Export-grade wooden crate / plywood case
• Protective film
• Anti-corrosion and moisture protection

Transportation

• Sea Freight — FCL/LCL for regular international orders
• Rail Freight — Available for selected China-Europe and regional routes
• Air Freight — Suitable for urgent engines or critical spare parts where applicable
• Road Freight — Domestic and cross-border transportation
• Multimodal Transport — Combined logistics based on destination and delivery schedule

Shipping terms such as EXW, FOB, CFR and CIF can be discussed according to the project.

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Frequently Asked Questions

Q:Can you supply replacement engines?

A:Yes. For a replacement project, provide the existing engine model, nameplate information, equipment model and available installation dimensions so compatibility can be evaluated.

Q:Can I specify the engine brand?

A:For project-based procurement, engine brand and model preferences can be discussed according to application, local service availability and technical requirements.

Q:Can you support OEM integration?

A:Yes. OEM and private-label projects are supported, with configuration and technical documentation tailored to project requirements.

Q:What information do you need before quotation?

A:At minimum: application, required power, RPM, duty, quantity and destination. For OEM or replacement projects, engine dimensions, mounting details and the existing engine model are also recommended.

Q:Can you supply spare parts?

A:Yes. Common maintenance components such as filters, belts, water pumps, injectors, sensors and control modules can be supplied according to the selected equipment.

Q:Do you provide technical documents?

A:Yes. Specifications, technical data sheets, manuals, wiring information, maintenance instructions and spare-parts lists can be provided according to project requirements.

Q:What are your payment terms?

A:30% T/T deposit before production and 70% balance before shipment. L/C at sight can also be discussed for qualified orders.

Q:How long does production take?

A:Lead time depends on the engine model, order quantity and configuration. The confirmed production schedule will be stated in the formal quotation after technical specifications are finalized.

Q:Can I order one engine first for evaluation?

A:For sample or project evaluation, a 1-unit order can be discussed, subject to the selected engine model and configuration.

As one of the most professional diesel engine manufacturers and suppliers in China, our products have good reputation in the market. We warmly welcome you to wholesale advanced diesel engine in stock here from our factory. If you have any enquiry about cooperation, please feel free to email us.