Product Overview

This is a premium replacement crankshaft engineered for Komatsu 4D105-3 diesel engines. Designed to meet or exceed original equipment specifications, this component is a critical part for engine rebuilds and repairs. We supply this high-demand part globally, with established logistics to major industrial markets in North America, Europe, the Middle East, and Asia-Pacific, ensuring reliable delivery for B2B clients and heavy machinery workshops worldwide.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM dimensions and tolerances for a perfect fit and optimal engine balance.
• Superior Durability: Made from high-grade forged steel, heat-treated for exceptional strength and resistance to wear and fatigue under heavy loads.
• Guaranteed Performance: Restores full engine power and torque output, ensuring reliable operation for demanding construction and industrial applications.
• Rigorous Quality Control: Each unit undergoes thorough inspection, including machinery test reports and video outgoing-inspection documentation.
• Direct OEM Replacement: Seamlessly replaces the original part without modifications, reducing downtime during critical repairs.

Technical Specifications

OEM Cross-Reference

This crankshaft directly replaces the following OEM part numbers:

• Komatsu: 6131-32-1101
• Komatsu: 6131-32-1100

It is the correct component for engines listed under the 4D105 and S4D105-3 model designations.

Compatibility

Compatible Engine Model: Komatsu 4D105-3 (S4D105-3) Diesel Engine.

Vehicle & Machinery Application: This crankshaft is suitable for a wide range of Komatsu equipment powered by the 4D105-3 engine, including but not limited to:

• Excavators
• Forklifts
• Trucks
• Loaders
• Bulldozers
• Buses
• And other industrial machinery

Global Supply & Distribution

We are a specialized exporter of heavy-duty engine components with extensive experience in international B2B trade. Our supply chain is optimized for fast, reliable global shipping.

• Worldwide Shipping: We ship 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).
• Efficient Logistics: Consolidated shipments to major ports and industrial hubs ensure cost-effective and timely delivery for bulk orders.
• Trade Compliance: All documentation (commercial invoice, packing list, test reports) is provided to ensure smooth customs clearance worldwide.

Quality Assurance

We stand behind the quality and reliability of our components with a comprehensive assurance program.

• Manufacturing Standard: Produced in ISO-certified facilities using advanced CNC machining and forging techniques.
• Warranty: Backed by a 6-month warranty from the date of delivery against manufacturing defects.
• Testing & Documentation: Every crankshaft is precision-measured and balanced. A machinery test report and video outgoing-inspection are provided upon request to verify quality before shipment.

FAQ

Q: How can I confirm this crankshaft will fit my specific Komatsu machine?
A: Confirm your machine’s engine model is the Komatsu 4D105-3 or S4D105-3. Cross-reference your old part number with our listed OEM numbers (6131-32-1101 or 6131-32-1100). For complex applications, providing your equipment’s model and serial number is recommended for final verification.

Q: What preparations are needed before installing this crankshaft?
A: Ensure the engine block is thoroughly cleaned and inspected for wear on main bearing bores. All new main and rod bearings should be installed. The crankshaft oil passages must be cleaned, and the unit should be lubricated during installation according to the engine service manual specifications.

Q: Do you provide support for international customers regarding customs and import duties?
A> Yes. We provide all necessary export documentation, including a detailed commercial invoice and packing list with accurate HS codes. While import duties are the responsibility of the buyer, our documentation is prepared to facilitate a smooth customs process. We can also recommend experienced freight forwarders in your region upon request.

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 .