Product Overview

This high-performance K3H engine bearing set is engineered for Mitsubishi industrial and heavy equipment diesel engines. Designed for durability under extreme loads, this set includes both main crankshaft bearings and connecting rod bearings for a complete engine rebuild. We supply these critical spare parts to a global network of distributors, engine rebuilders, and heavy machinery workshops, with major markets in North America, Europe, the Middle East, and the Asia-Pacific region.

Key Features & Benefits

• Premium Material Construction: Manufactured from high-strength aluminum alloy with an advanced overlay for superior fatigue resistance and embeddability of contaminants.
• Precision Engineering: Computer-controlled machining ensures exact OEM dimensions and tolerances for perfect fitment and optimal oil clearance.
• Enhanced Durability: Specialized surface treatment improves wear resistance and corrosion protection, extending service life in demanding applications.
• Optimal Performance: Maintains proper oil film thickness for reduced friction, lower operating temperatures, and maximum engine power output.
• Complete Rebuild Kit: Provides all necessary main and rod bearings for a full engine overhaul, ensuring compatibility and simplifying procurement.

Technical Specifications

OEM Cross-Reference

This K3H bearing set directly replaces the following OEM part numbers. Always verify the specific engine model and serial number before installation.

• Mitsubishi: K3H (Primary Reference)
• Common Alternative Numbers: MD172947, MD172948 (Consult factory for full interchange list based on engine variant).

Compatibility

Compatible Mitsubishi Diesel Engine Models:

• 4M40-T / 4M40-T2
• 4M50-T / 4M50-T2
• 6D16-T / 6D16-T2

Typical Vehicle & Equipment Applications:

• Mitsubishi Fuso Canter, Fighter, and Super Great trucks
• Mitsubishi excavators and wheel loaders (models equipped with above engines)
• Various industrial generators and marine auxiliary power units

Application Period: Commonly used in engines manufactured from the 1990s through the 2000s. Compatibility is based on engine specification, not vehicle year.

Global Supply & Distribution

We are a leading global supplier of heavy-duty engine components with extensive export experience. Our logistics network ensures reliable delivery to key industrial hubs worldwide.

• Worldwide Shipping: We ship via air and sea freight to all major markets, including North America (USA, Canada, Mexico), Europe (Germany, UK, Poland, Netherlands), the Middle East (UAE, Saudi Arabia), Asia-Pacific (Australia, Singapore, Japan), and South America.
• Fast Delivery to Major Ports: Consolidated container loads and express air freight options are available for fast delivery to ports like Los Angeles, Rotterdam, Hamburg, Dubai, Singapore, and Sydney.
• Trade Compliance: All exports are handled with proper commercial invoices, packing lists, and compliance with international shipping regulations (Incoterms: FOB, CIF, DAP).
• B2B Focus: We specialize in bulk orders for distributors and large workshops, offering competitive MOQ and OEM packaging options.

Quality Assurance

• Manufacturing Standards: Components are produced in ISO-certified facilities using state-of-the-art CNC machinery and precision measurement systems (CMM).
• Rigorous Testing: Each batch undergoes dimensional inspection, hardness testing, and material composition analysis to ensure consistency and reliability.
• Warranty: Backed by a standard 12-month warranty against manufacturing defects from the date of purchase, subject to proper installation and use.
• Pre-Shipment Inspection: Available upon request for large orders to verify quantity, part numbers, and packaging.

FAQ

Q1: How do I confirm this K3H bearing set is correct for my specific Mitsubishi 4M40 engine?
A1: The K3H designation is the primary identifier. For absolute certainty, we recommend matching it against your old bearing shells’ markings and cross-referencing your engine’s full model and serial number with our technical team. Differences in engine sub-models (e.g., turbo variant, industrial vs. automotive) can sometimes affect bearing specifications.

Q2: What is the recommended installation procedure for these bearings?
A2: Professional installation is crucial. Always clean all engine passages and components thoroughly. Use a plastigauge to verify the specified oil clearance for both main and rod journals as per the engine service manual. Ensure proper lubrication of bearing surfaces during assembly and follow the manufacturer’s torque sequence and specifications precisely.

Q3: Do you supply individual bearings, or is this only available as a complete set?
A3: This product is typically supplied as a complete engine set covering all main and connecting rod positions, which is the standard for a professional rebuild. For individual bearing sales (e.g., a single rod bearing), please contact our sales team with the specific position and engine details, as availability may vary.

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 .