Product Details

Product Overview

We offer a premium, high-strength Forged Steel Crankshaft specifically engineered for the Isuzu 4JB1 diesel engine. This critical rotating assembly component is manufactured to meet or exceed OEM specifications, ensuring reliable performance in demanding industrial applications such as excavators, generators, and heavy machinery. With a robust global supply chain, we ship to major markets worldwide, including North America, Europe, Southeast Asia, and the Middle East, providing a cost-effective alternative to dealership parts without compromising on quality.

Key Features & Benefits

• Superior Material Strength: Constructed from high-grade forged steel, offering exceptional tensile strength and fatigue resistance compared to cast iron alternatives.
• Precision Engineering: Machined to tight tolerances with precision-ground journals for optimal oil film retention and reduced friction, enhancing engine life.
• Enhanced Durability: Nitrided or induction-hardened surfaces provide superior wear resistance against main and connecting rod bearings.
• Direct OEM Replacement: Designed as a direct bolt-in replacement for the original Isuzu 4JB1 crankshaft, ensuring seamless installation and perfect fitment.
• Improved Engine Balance: Dynamically balanced to minimize vibration, ensuring smooth operation and reducing stress on other engine components.

Technical Specifications

OEM Cross-Reference

This crankshaft is a direct replacement for the following original equipment manufacturer (OEM) numbers:

• Isuzu Part Number: 8944436620
• Isuzu Number (Hyphenated): 8-94443-662-0
• Isuzu Number (Superseded): 8-97331853-0

Note: Always verify your existing part number for compatibility.

Compatibility

This crankshaft is specifically designed for the Isuzu 4JB1 series diesel engine. Common applications include:

• Excavators: Sumitomo SH100, Kobelco SK100, Hitachi EX100
• Industrial Engines: Isuzu 4JB1T (Turbocharged) and 4JB1N (Naturally Aspirated) variants
• Vehicles: Isuzu NPR/NQR trucks, Isuzu Bighorn/Trooper (some models)
• Generators & Pumps: Various industrial equipment utilizing the 4JB1 power plant

For specific vehicle or equipment fitment, please consult your engine serial number.

Global Supply & Distribution

We are a leading exporter of heavy-duty engine components, ensuring fast and reliable delivery to industrial hubs worldwide.

• Worldwide Shipping: We ship via air (DHL, FedEx, UPS) and sea (FCL/LCL) to all major ports.
• Major Markets Served: North America (Houston, Los Angeles), Europe (Rotterdam, Hamburg), Asia-Pacific (Singapore, Dubai), Middle East (Dubai, Jeddah), and Africa (Mombasa, Durban).
• Fast Delivery: Stock items are dispatched within 24-48 hours of order confirmation. Sea freight typically takes 20-35 days.
• Export Experience: We have extensive experience with international trade documentation, customs clearance, and compliance with local regulations.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001:2015 certified facilities, utilizing advanced forging and machining technology.
• Testing: Each crankshaft undergoes rigorous inspection including dimensional checks, magnetic particle inspection (MPI) for surface cracks, and hardness testing.
• Warranty: We offer a standard 12-month warranty against manufacturing defects from the date of shipment.
• Certification: Material test certificates and inspection reports are available upon request.

FAQ

Q1: Is this crankshaft a direct fit for my Isuzu 4JB1 engine, or do I need modifications?

This crankshaft is designed as a direct bolt-in replacement for the original Isuzu 4JB1 crankshaft. No modifications are required. However, we always recommend comparing the counterweight profile and overall length to your original part to ensure perfect compatibility with your specific engine variant (e.g., turbo or non-turbo).

Q2: What is the recommended installation procedure for this forged steel crankshaft?

Installation should be performed by a qualified diesel mechanic. Key steps include: 1) Thoroughly cleaning the block and bearing saddles. 2) Using new main and rod bearings with proper clearance (check with Plastigauge). 3) Applying assembly lube to all journals and bearings. 4) Torquing main bearing caps to the manufacturer’s specification in the correct sequence. 5) Checking crankshaft end-play after installation.

Q3: How does a forged steel crankshaft compare to a cast iron one for the 4JB1 engine?

A forged steel crankshaft is significantly stronger and more durable than a standard cast iron unit. It offers superior resistance to bending and torsional fatigue, making it the ideal choice for high-stress applications like excavators or turbocharged engines. While cast iron is suitable for standard applications, forged steel provides a longer service life and greater reliability under heavy loads.

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 .