Product Overview

This is a premium replacement crankshaft engineered for Komatsu 4D94 series diesel engines. Designed to meet or exceed original equipment specifications, this part is manufactured for durability and reliable performance under demanding conditions. We supply this critical engine component to a global network of distributors, heavy equipment repair shops, and fleet operators, with major markets in North America, Europe, the Asia-Pacific region, and the Middle East.

Key Features & Benefits

• Precision Machined: Manufactured to exact OEM tolerances for a perfect fit and optimal engine balance.
• Premium Material: Forged from high-strength alloy steel for exceptional durability and resistance to fatigue and torsional stress.
• Advanced Heat Treatment: Undergoes precise hardening and tempering processes to ensure core toughness and hardened journal surfaces for extended bearing life.
• Comprehensive Quality Control: Each unit is rigorously inspected for dimensional accuracy, surface finish, and material integrity.
• Direct Replacement: Designed as a direct bolt-on component, ensuring straightforward installation without modifications.

Technical Specifications

OEM Cross-Reference

This crankshaft corresponds directly to the following OEM part number:

• Komatsu: 6144-31-1200

It is a direct replacement for the original component. Always verify the part number stamped on your original crankshaft before ordering.

Compatibility

This crankshaft is specifically designed for Komatsu engines utilizing the 4D94 engine block. It is commonly found in a range of Komatsu construction and industrial equipment. For precise application, confirm your engine’s model and serial number.

• Primary Application: Komatsu 4D94 Series Diesel Engines.
• Typical Equipment: Used in various Komatsu excavators, wheel loaders, and other mid-sized machinery powered by the 4D94 engine.

Global Supply & Distribution

We are a trusted global supplier of heavy-duty engine components. Our logistics network ensures efficient delivery to key industrial hubs worldwide.

• Worldwide Shipping: We export to all major markets, including North America (USA, Canada, Mexico), Europe (UK, Germany, Netherlands), Asia-Pacific (Australia, Japan, Singapore), and the Middle East (UAE, Saudi Arabia).
• Fast Delivery: Stocked inventory allows for prompt dispatch. We offer shipping via air and sea to major ports and airports to meet urgent project timelines.
• Export Expertise: All documentation, including commercial invoices, packing lists, and certificates of origin, is prepared to full international trade compliance standards for smooth customs clearance.

Quality Assurance

Our commitment to quality ensures you receive a reliable, high-performance part.

• Manufacturing Standards: Produced in ISO-certified facilities using advanced CNC machinery and metallurgical processes.
• Rigorous Testing: Each crankshaft undergoes magnetic particle inspection (MPI) for crack detection and precise dimensional checks against master gauges.
• Warranty: Backed by a comprehensive warranty against manufacturing defects. Specific warranty terms are provided with the commercial invoice.

FAQ

Q1: How do I confirm this crankshaft will fit my Komatsu engine?
A1: The primary identifier is the part number 6144-31-1200. Verify this number against your engine’s service manual or the original part removed. Also, confirm your engine is a Komatsu 4D94 series. Providing your equipment model and engine serial number to our technical team allows for final verification.

Q2: What precautions should be taken during installation?
A2: Professional installation is highly recommended. Ensure the engine block and all main bearing caps are clean and within specification. Always use new main and rod bearings, and follow the manufacturer’s specified torque sequence and values precisely. Proper lubrication of all journals and bearings during assembly is critical.

Q3: Is this crankshaft balanced, and will it require additional balancing?
A3: This replacement crankshaft is manufactured and balanced to OEM standards as a standalone component. For optimal performance and longevity, especially in high-hour engines, it is considered best practice to have the entire rotating assembly (crankshaft, pistons, rods, flywheel, and damper) balanced as a set by a qualified machine shop.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .