Product Overview

This is a high-performance replacement crankshaft engineered for Yanmar 3TNE series diesel engines. Designed for durability and precision, it is a critical component for engine rebuilds and repairs in construction, industrial, and agricultural machinery. We supply this genuine-quality part globally, with extensive experience serving major markets across North America, Europe, Asia-Pacific, and the Middle East.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM specifications for perfect fit and optimal engine balance.
• Premium Material: Forged from high-grade alloy steel for exceptional strength and resistance to fatigue under heavy loads.
• Advanced Heat Treatment: Undergoes precise hardening and tempering processes to ensure superior surface hardness and a tough, durable core.
• Micro-Finished Journals: Critical bearing surfaces are precision ground and micro-finished to minimize friction, reduce wear, and promote optimal oil film retention.
• Direct OEM Replacement: Restores original engine performance, reliability, and service life without compatibility concerns.

Technical Specifications

OEM Cross-Reference

This crankshaft directly replaces the following OEM part numbers:

• Yanmar: 129004-21002
• Yanmar: YM129004-21002

Compatibility

This crankshaft is designed for use in the following Yanmar diesel engine models, commonly found in a range of industrial and construction equipment:

• Engine Models: Yanmar 3TNE84, Yanmar 3TNE88
• Typical Applications: Compact excavators, mini excavators, skid-steer loaders, and stationary industrial power units utilizing these engine models.
• Note: Always verify your engine’s model and serial number before purchase to ensure correct fitment.

Global Supply & Distribution

We are a trusted global supplier for heavy machinery parts. Our logistics network ensures reliable delivery to key industrial regions worldwide.

• Worldwide Shipping: We export to all major markets, including North America (USA, Canada), the European Union, the UK, Australia, Southeast Asia, the Middle East, and Africa.
• Efficient Logistics: Shipments are dispatched from strategic hubs for fast delivery to major ports and inland freight centers.
• Trade Compliance: All documentation (commercial invoice, packing list, certificate of origin) is prepared to meet international customs requirements for a smooth clearance process.
• B2B Focus: We specialize in serving workshops, machinery dealers, and fleet maintenance operations with volume order capabilities.

Quality Assurance

• Manufacturing Standards: Produced in ISO-certified facilities using advanced CNC machining and quality control protocols.
• Rigorous Testing: Each crankshaft undergoes dimensional inspection, hardness testing, and magnetic particle inspection (MPI) to detect surface flaws.
• Warranty: Backed by a standard warranty against manufacturing defects. Please contact us for specific warranty terms and duration.
• Packaging: Securely packaged in protective materials and shipped in a sturdy export carton to prevent damage during transit.

FAQ

Q: How can I confirm this crankshaft fits my specific Yanmar engine?
A: The most reliable method is to match the part number. Locate the original crankshaft part number (stamped on the part or listed in your engine’s service manual) and verify it matches 129004-21002 or YM129004-21002. Also, confirm your engine’s model is a 3TNE84 or 3TNE88.

Q: Is this a genuine Yanmar part or an aftermarket equivalent?
A> This is a high-quality aftermarket replacement part manufactured to meet or exceed OEM specifications. It is designed as a direct, bolt-on replacement, offering comparable performance and durability at a competitive price point.

Q: What precautions should be taken during installation?
A> Professional installation is recommended. Critical steps include: thoroughly cleaning the engine block and oil galleries, using new main and rod bearings, verifying proper bearing clearances with plastigage, ensuring precise torque and angle sequences during assembly, and priming the oil system before initial start-up to prevent immediate bearing damage.

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 .