Excavator Engine Assembly & Parts Supplier from China

Excavator engines are built for power, reliability, and rugged performance. YNF Machinery offers complete engines and components for major brands, ensuring fast replacement and optimal machine uptime.

Key Features:

  • Supports CAT, Komatsu, Doosan, Volvo, Hitachi, Hyundai, and more

  • Complete engines, cylinder blocks, cylinder heads, pistons, crankshafts, etc.

  • Compatible with 3-cylinder, 4-cylinder, and 6-cylinder diesel engines

  • Rebuilt, brand-new, and OEM-compatible units available

  • Professional part matching with model/serial number support

  • Load-tested engines with performance inspection before shipment

excavator-engine-supplier-from-China

Excavator Engine Series for Leading Construction Brands

Our excavator engine product line includes full engines, engine rebuild kits, and key internal components. Whether you require a Komatsu 6D105 engine or a CAT C4.4 engine assembly, we help you match the right configuration based on part numbers or machine models. All units are tested for performance and backed by technical support.

Diesel Engine Assembly for Excavator Rebuild
Kubota V2203-M-DI-ES01 engine mounted on Bobcat S175
6D24T 2

Why Our Excavator Engines Are Trusted Worldwide

We provide cost-effective engine solutions with verified performance, high durability, and global compatibility. Each engine is fully inspected before delivery, ensuring reduced downtime and repair risk for your excavator fleet.

Full Range for Major Excavator Brands

We supply complete engines and core components compatible with leading excavator brands like Caterpillar, Komatsu, Doosan, Hyundai, and Hitachi. Whether you need a new, rebuilt, or replacement engine, we offer the right match for your machine.

Verified Quality with Test Reports

Each excavator engine is performance-tested under load before shipping. We provide inspection videos, power output verification, and warranty-backed quality—reducing your risk of downtime due to engine failure.

Expert Matching by Part Number or Model

Our team helps you identify the correct engine based on machine model, serial number, or part number. This ensures seamless replacement and avoids costly fitment errors or compatibility issues.

Fast Lead Times and Global Shipping Options

Whether you need one unit or multiple containers, we offer short production cycles, ready stock for popular models, and global delivery via sea or air freight—so your business stays on schedule.

Why Choose YNF Excavator Engines to Power Your Machines

YNF Machinery offers reliable excavator engines with OEM-level precision and responsive global support. With full technical matching, short lead times, and export-standard packaging, we help you maintain productivity with confidence.

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Excavator Engine Applications

Construction Machinery

Provides reliable engine power for excavators on construction sites.

Mining Equipment

Delivers continuous power in high-load mining conditions.

Rental Fleets

Ensures stable performance and low maintenance for rental machines.

Road & Bridge Projects

Used in long-running excavators for public infrastructure works.

Here is a comprehensive list of excavator engine brands and models available in the market

Popular Engine Models We Support

Brand Engine Models Types Available
CAT C2.2, C4.4, C6.6 Complete, rebuilt kits
Komatsu 4D95, 6D105, SAA6D102 Long block, short block
Doosan DB58, DL06, DE12 Piston kits, cylinder head
Yanmar 4TNV94, 3TNV88 Engine, overhaul kit
Isuzu 4HK1, 6BG1, 6HK1 OEM replacement available
1. Caterpillar (CAT) · Small Excavators: o 301.7 CR – Cat® C1.1 Engine o 305.5E2 – Cat® C2.4 DI Engine · Medium Excavators: o 320D/DL – Cat® C6.6 ACERT™ Engine o 323DL – Cat® C6.6 ACERT™ Engine · Large Excavators: o 336D/DL – Cat® C9 ACERT™ Engine o 345D/DL – Cat® C13 ACERT® Engine 2. Doosan · Small Excavators: o DX35Z-5 – Yanmar 3TNV88 Engine o DX55-5B – Yanmar 4TNV98 Engine · Medium Excavators: o DX225LC-5 – Doosan DL06P Engine o DX260LC-5 – Doosan DL08 Engine · Large Excavators: o DX340LC-5 – Scania DC9 Engine o DX520LC-5 – Scania DC13 Engine
3. Komatsu · Small Excavators: o PC30MR-5 – Komatsu 3D88E-6 Engine o PC55MR-5 – Komatsu 4D88E-6 Engine · Medium Excavators: o PC200-8 – Komatsu SAA6D107E-1 Engine o PC220-8 – Komatsu SAA6D107E-1 Engine · Large Excavators: o PC360LC-11 – Komatsu SAA6D114E-6 Engine o PC490LC-11 – Komatsu SAA6D125E-6 Engine 4. Hyundai · Small Excavators: o R35Z-9 – Yanmar 3TNV88 Engine o R55-9 – Yanmar 4TNV98 Engine · Medium Excavators: o R220LC-9S – Cummins B5.9-C Engine o R260LC-9S – Cummins C8.3-C Engine · Large Excavators: o R335LC-9 – Cummins QSB6.7 Engine o R480LC-9 – Cummins QSM11 Engine
5. Hitachi Construction Machinery · Small Excavators: o ZX33U-5A – Yanmar 3TNV88-BPHG Engine o ZX55U-5A – Yanmar 4TNV88-BPHG Engine · Medium Excavators: o ZX200-5G – Isuzu AA-6BG1T Engine o ZX240-5G – Isuzu CC-6BG1T Engine · Large Excavators: o ZX350LCH-5G – Isuzu 6HK1X Engine o ZX490LCH-5G – Isuzu 6WG1 Engine 6. JCB · Small Excavators: o 48Z-1 – JCB Diesel by Kohler 48 kW Engine o 55Z-1 – JCB 55.4 kW Dieselmax Engine · Medium Excavators: o JS130 – JCB EcoMAX 444 Engine o JS220 – JCB EcoMAX 448 Engine · Large Excavators: o JS330 – Isuzu 6HK1X Engine o JS370 – Isuzu 6UZ1X Engine
7. Volvo Construction Equipment · Small Excavators: o EC35D – Volvo D1.8A Engine o EC55D – Volvo D2.4D Engine · Medium Excavators: o EC200D – Volvo D5E Engine o EC250D – Volvo D6E Engine · Large Excavators: o EC350D – Volvo D8H Engine o EC480D – Volvo D13H Engine 8. SANY · Small Excavators: o SY35U – Yanmar 3TNV88F Engine o SY55C – Yanmar 4TNV98C Engine · Medium Excavators: o SY215C – Cummins QSB6.7 Engine o SY235C – Isuzu 4HK1 Engine · Large Excavators: o SY335C – Isuzu 6HK1X Engine o SY500H – Isuzu 6WG1X Engine
9. Kobelco · Small Excavators: o SK30SR-6 – Yanmar 3TNV88F-USBK Engine o SK55SRX-6 – Yanmar 4TNV88-BPYB Engine · Medium Excavators: o SK200-10 – HINO J05EUM-KSSL Engine o SK250-10 – HINO J05EUM-KSJJ Engine · Large Excavators: o SK350LC-10 – Isuzu 6HK1 Engine o SK500LC-10 – Isuzu 6WG1 Engine 10. John Deere · Small Excavators: o 35G – Yanmar 3TNV88 Engine o 50G – Yanmar 4TNV88 Engine · Medium Excavators: o 210G LC – John Deere PowerTech PSS 4045H Engine o 245G LC – John Deere PowerTech PSS 6068H Engine · Large Excavators: o 350G LC – John Deere PowerTech PSS 6090H Engine o 470G LC – Isuzu 6UZ1X Engine

How to Confirm Engine Compatibility

  • Provide machine model and engine serial number

  • Share part number or block casting number

  • Our team will verify specs within 24 hours

Testing & Quality Assurance

  • Load test with oil pressure and smoke level check

  • Photos, videos, and testing data available before shipment

  • Factory certificate and warranty for select units

Delivery & Export Support

  • Export-grade packaging with engine brackets and wooden cases

  • Shipping via sea freight, air cargo, or express for smaller parts

  • Incoterms: EXW, FOB, CIF supported

  • Payment via T/T, PayPal, Western Union

FAQ Guide

Q: Can I get a complete engine or just internal parts?
A: Both options are available. We supply full engines and internal kits.

Q: Are these engines brand-new or rebuilt?
A: We offer both new and professionally rebuilt engines, depending on availability and your budget.

A Buyer’s Guide to Selecting the Best Diesel Engine for Excavators

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Choosing the right excavator diesel engine helps your excavator work better. A good diesel engine saves money and increases productivity. Fuel costs can be 30-40% of expenses, costing $6-$75 per hour depending on size. New features like turbocharging and valve timing in the excavator diesel engine use less fuel and pollute less. But excavators still lose 70% of engine energy as heat. Picking the best excavator diesel engine ensures your excavator runs efficiently.

Key Takeaways

  • Pick a diesel engine that fits your excavator’s size and tasks. Enough power makes work smoother and avoids wasting fuel.
  • Find engines that use less fuel. This lowers fuel costs and means fewer refueling breaks.
  • Make sure the engine meets emissions rules like Tier 4. This keeps the air cleaner and avoids fines.
  • Choose a tough engine that handles hard jobs well. Strong engines last longer and need fewer repairs.
  • Ensure the engine works with your excavator’s design. A proper match boosts performance and saves money on changes.

Understanding Excavator Diesel Engines

The Role of Diesel Engines in Excavators

Diesel engines are the heart of excavators. They help them do tough jobs easily. These engines give the power to lift heavy things, dig hard ground, and work in rough places. They provide strong power at slow speeds, so the excavator works well without wasting energy.

Today’s diesel engines are much better than before. Features like turbocharging and better fuel systems make them stronger and cleaner. These updates help diesel engines work well while being good for the environment. Also, they last a long time, even in hard conditions, making them perfect for construction work.

Attribute Description
Efficiency Diesel engines save fuel, cutting costs for big machines.
Durability They are tough and can handle long, hard use.
Torque Output Strong power at slow speeds helps with heavy tasks.
Technological Advancements New features improve performance and reduce pollution, making them vital for excavators.

Key Specifications to Consider

When picking a diesel engine for your excavator, check these important things:

  1. Power Output: Horsepower shows how much work the engine can do. Pick one that fits your excavator’s size and job.
  2. Fuel Efficiency: Engines that use less fuel save money and need fewer stops for refueling. Look for advanced fuel systems.
  3. Emissions Compliance: Rules require engines to be clean. Make sure the engine meets Tier 4 or similar rules to avoid fines and help the planet.
  4. Durability: A strong engine lasts longer and needs less fixing. This keeps your excavator working more.
  5. Compatibility: The engine should match your excavator’s design. Check with the maker to ensure it fits before buying.

By checking these points, you can find a diesel engine that works well, saves money, and lasts long.

Factors to Think About When Picking an Excavator Diesel Engine

Power Output and How It Works

An engine’s power decides how well it handles tough jobs. Choose one with enough horsepower for your excavator’s size and tasks. A small engine might struggle with heavy work. A big engine could waste fuel and cost more money.

Performance measures like power, speed, and energy use show how engines work in different situations. For example, energy efficiency gets better with speed but drops if speed is too high:

Load Power (kW) Speed (r/min) Energy Efficiency (%)
5 300 49.0
5 600 62.0
5 900 62.6
5 1200 57.8
5 1500 51.8

 

Pick an engine that balances power and efficiency. This helps your excavator work well without wasting energy or money.

Fuel Use and Costs

Fuel efficiency is key to saving money while working. For example, a small excavator running 8 hours uses about 11 liters of fuel. At $4 per gallon, this costs around $11.60. Efficient engines save fuel and reduce stops for refueling, speeding up your work.

You can save more fuel by using smart habits. Start with light tasks to warm up the engine slowly. Keep a steady pace instead of stopping often. This keeps fuel use close to 1 liter per hour. These small changes can save a lot of money over time.

Emissions Rules and Cleaner Engines

Excavators must follow strict rules to lower pollution. Diesel engines have limits on harmful gases like nitrogen oxides (NOx) and tiny particles (PM). The table below shows emissions levels for different engine sizes:

Engine Power (kW) Year NOx (g/kWh) PM (g/kWh)
56-130 2012-2013 2.3 (Option 1) / 3.4 (Option 2) Interim Tier 4
130-560 2011-2013 2.0 Final Tier 4

 

Lower emissions help meet rules and protect the environment. Studies show stricter rules have cut pollution from machines. Picking an engine that meets these rules helps your work stay eco-friendly.

Durability and Engine Lifespan

Durability is very important when picking a diesel engine. A strong engine helps your excavator work well under heavy loads. It also reduces downtime from repairs. Modern engines are built to handle tough conditions. However, how long they last depends on care and use.

Kubota engines come with a two-year or 2,000-hour warranty. With good care, many users say these engines last up to 10,000 hours. Cummins tested a Tier 4 engine after 10,000 hours of use. The main parts were still in great shape, showing its strength. Another study of the QSL9 Tier 4 engine found it stayed almost perfect after 10,000 hours. This proves its reliability.

Data shows diesel engines can last a long time with proper care. Maintenance like adjusting RPM and tightening engine heads helps them last longer. For example, lowering RPM from 3,200 to 2,800 improved Toro-Flow engines’ durability. Some fleets used these engines for 20 years with regular care.

Diesel engines often last longer than other excavator parts. Hydraulic excavators usually need major repairs after 9,800 hours. Mini-excavators last about 10,000 hours. Even if the engine works, other parts may need fixing.

To make your engine last longer, follow a strict care plan. Change oil, replace filters, and check parts often. Taking care of your engine keeps your excavator running well for years. This saves money and boosts productivity.

Compatibility with Excavators

Compatibility is key when choosing a diesel engine for your excavator. The engine must fit your excavator’s design and needs. Manufacturers give details to help you pick the right engine.

For example, the Cat® C3.6 engine meets strict emission rules like Tier 4 Final. It produces less CO2 than older models like the 313F GC. This engine works with biodiesel and renewable diesel, making it eco-friendly. Features like auto speed control save fuel and cut emissions. Remote diagnostics and software updates make it easy to use with modern excavators.

Feature Details
Engine Model Cat® C3.6
Emission Standards Meets U.S. EPA Tier 4 Final, EU Stage V, Japan 2014
CO2 Emissions Lower emissions compared to 313F GC
Fuel Compatibility Up to 100% biodiesel, renewable diesel, HVO, GTL
Auto Engine Speed Control Reduces fuel burn and emissions
Maintenance Services Cat Scheduled Oil Sampling (S•O•S℠) for monitoring wear and fluids
Remote Diagnostics Cat® Remote Troubleshoot for quick issue resolution
Software Updates Cat® Remote Flash for convenient updates
Sustainability Cat Reman parts for reduced environmental impact

When checking compatibility, look at the engine’s size, power, and mounting needs. A wrong engine can waste fuel and harm your excavator. Always ask the manufacturer or an expert to confirm the engine fits your machine.

Choosing a compatible engine avoids costly changes and keeps your excavator working smoothly. A good match improves performance, lowers costs, and helps your machine last longer.

Maintenance and Long-Term Considerations for Excavator Diesel Engines

Easy Repairs and Maintenance

Pick a diesel engine that’s easy to fix and maintain. A well-kept engine works better and breaks down less. Engines with simple parts and easy access save time and money. For example, engines with multiple panels let workers reach parts without taking everything apart.

Taking care of your engine early can prevent big problems. Tools like real-time alerts and smart scheduling apps, such as the HVI APP, help a lot. Companies like T&T Construction save money and work faster using these tools. Choosing engines that need less maintenance also means fewer work delays.

Fixing small issues early saves money and keeps engines running longer. Regular checks help find problems before they get worse. This way, your excavator stays in good shape for years.

Tip: Choose engines with simple designs and clear instructions. These features make repairs and checks easier, saving time and money.

Spare Parts Availability

Having spare parts ready is important for keeping your excavator working. A good supply chain helps you replace parts quickly, reducing downtime. Online platforms now make ordering parts faster and easier. This improves how well your machine works.

Selling spare parts is also a big part of engine upkeep. Many manufacturers earn a lot from these sales, showing their importance. Picking an engine with strong support ensures your excavator works well for a long time.

Note: Before buying, check if the maker has a full parts list. This ensures you can get what you need without waiting.

Warranty and Support

Warranties and support plans are key for long-term engine use. A good warranty protects your money and gives peace of mind. Top brands offer different levels of coverage and help.

Company Warranty Length Coverage Support Hours Response Time
Caterpillar 3 years Engine, Hydraulics, Electrical 24/7 Within 2 hours
Komatsu Up to 5 years Various parts Business hours Within 4 hours
Volvo N/A N/A 24/7 Within 1 hour
JCB N/A N/A Business hours Within 3 hours

Caterpillar offers a three-year warranty for key parts like engines and hydraulics. They also provide 24/7 help with fast responses in two hours. Komatsu gives up to five years of coverage, great for long projects.

When comparing warranties, check what they cover and how fast help comes. These details can save time and keep your excavator running smoothly.

Tip: Read warranty details carefully. Pick one that covers key parts and offers quick help to avoid delays.

Practical Tips for Choosing the Right Excavator Diesel Engine

Checking Manufacturer Reputation

Start by looking into the reputation of engine makers. Trusted brands often mean better quality and longer-lasting engines. Companies like Caterpillar, Cummins, and Volvo are famous for strong and innovative designs.

See if the company spends money on research and new ideas. Brands that focus on improving technology make engines that save fuel and pollute less. Also, check if they have a global network for support. A strong network helps you get spare parts and repairs easily.

Tip: Pick brands with awards or certifications for quality. These show they care about making great products.

Reading Reviews and Feedback

Customer reviews can tell you how engines work in real life. Read what other excavator owners say about the engine you’re considering. Look for comments on fuel savings, strength, and easy repairs.

Websites and forums about construction are good places to find honest opinions. Notice patterns in reviews. For example, if many people say an engine works well under heavy loads, it’s likely reliable. But if there are repeated complaints about breakdowns, think twice.

Note: Focus on reviews from people using similar excavators. Their experiences will match your needs better.

Asking for Demos or Performance Data

Ask for a demo or check performance data to decide better. Many companies share details to show how their engines perform. For example:

  • Danfoss says their Dextreme system cuts fuel use by 15% by using a Digital Displacement pump instead of a regular one.
  • Tests with updated Volvo EC200 excavators show better efficiency than older models.
  • The Dextreme system reduces hydraulic energy loss, allowing slower engine speeds without stalling. This can save up to 50% fuel for all excavator sizes.

Request similar data or watch a live demo. Seeing the engine in action helps you judge its power, fuel use, and how smoothly it runs.

Tip: Match the performance data with your excavator’s needs to ensure it fits well and works efficiently.

Consulting with Industry Experts

Talking to experts can help you pick the right excavator diesel engine. These professionals know a lot about excavators and can stop you from making expensive mistakes. Their advice helps you choose the best engine for your needs.

Start by contacting people in construction or heavy machinery. Many companies have advisors who explain engine features and specs. They can show how size, power, and fuel use affect performance.

You can also visit trade shows or events. These often have live demos and expert talks. You’ll see how engines work in real situations, like lifting heavy loads or handling bad weather.

Tip: Write down questions before meeting experts. Ask about engine strength, care needs, and if it fits your excavator.

Online groups and forums are helpful too. Websites like LinkedIn or construction forums let you talk to skilled operators. They share honest reviews about engines, which helps you decide better.

If you’re unsure, hire a consultant. They can check your project and suggest the best engine. This ensures the engine matches your budget and goals.

By asking experts, you learn more about picking the right engine. Their tips save time, money, and effort, keeping your excavator running well for years.

Picking the right diesel engine helps your excavator work well. Check power, fuel use, emissions, and fit to choose wisely. Diesel engines are popular because they last long and save fuel. They also meet strict pollution rules. Makers keep improving them with new features like turbocharging and better fuel systems. These engines handle tough jobs and rough places easily. Focus on what you need and research carefully. This way, you can save money and get more work done for a long time.

FAQ

What matters most when picking a diesel engine for excavators?

Make sure the engine fits your excavator. A good fit helps it work well, saves fuel, and avoids expensive changes. Always check with the maker before buying.

How can you make your excavator diesel engine use less fuel?

Use smart habits while working. Start with easy tasks to warm up the engine. Keep a steady speed and don’t stop too often. Clean filters and check fuel systems regularly to save fuel.

Do all excavators need Tier 4 engines?

Yes, in places with strict pollution rules like the U.S. or Europe. Tier 4 engines cut harmful gases and meet these rules, helping the environment.

How long do diesel engines usually last in excavators?

With good care, they last 10,000 to 20,000 hours. Regular oil changes and part checks help them last longer and work better.

Why is the maker’s reputation important when choosing a diesel engine?

Trusted makers give strong engines, good warranties, and fast help. This means you get a long-lasting engine and quick fixes when needed.

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