Nissan Machinery K21 K25 Diesel Engine Crankshaft 12201-fu400 12201-50k00

Product Details

Product Overview

This professional-grade crankshaft is a direct replacement component designed for Nissan Machinery diesel engines, specifically the K21 and K25 engine models. As a critical rotating assembly part, it converts the reciprocating motion of the pistons into rotational torque to power the engine. This listing offers the exact OEM reference numbers 12201-fu400 and 12201-50k00, ensuring precise fitment for your industrial or construction equipment.

Manufactured under the brand and sourced from Guangdong, China, this crankshaft is built to OEM size specifications. It is an ideal choice for engine rebuilds or maintenance on various machinery applications, including construction, agriculture, and industrial power units. Please verify your engine model (K21 or K25) and existing part number to confirm compatibility before purchase.

Key Features & Benefits

• OEM Reference Fitment: Directly matches Nissan Machinery part numbers 12201-fu400 and 12201-50k00, providing high fit confidence for K21 and K25 diesel engines.
• Heavy-Duty Construction: Weighing 38 kg, this crankshaft is built for durability and long service life in demanding industrial and construction environments.
• OEM Size Accuracy: Manufactured to standard OEM dimensions, ensuring proper clearance and alignment with connecting rods and main bearings.
• Comprehensive Quality Checks: Includes a machinery test report and outgoing video inspection to verify performance and dimensional accuracy before shipping.
• Reliable Warranty Coverage: Backed by a 6-month warranty and online after-warranty support for peace of mind on your investment.
• Versatile Application: Suitable for a wide range of equipment including construction machinery, agricultural tractors, generator sets, and marine engines.

Technical Specifications

OEM Cross-Reference

This crankshaft is a direct replacement for the following original equipment manufacturer (OEM) part numbers. Use these numbers to verify compatibility with your engine:

• Nissan Machinery: 12201-fu400
• Nissan Machinery: 12201-50k00

Note: Always cross-reference with your original part number before ordering. If your specific OEM number is not listed, please contact our support team for assistance.

Compatibility

This crankshaft is specifically designed for and commonly used in the following engine applications:

• Engine Models: Nissan Machinery K21 Diesel Engine, Nissan Machinery K25 Diesel Engine
• Equipment Applications: Commonly used for construction machinery, industrial equipment, agricultural tractors, generator sets (genset), marine engines, and material handling equipment powered by K21 or K25 engines.

Important: This part is designed for Nissan Machinery engines. Always confirm your engine model and existing part number to ensure correct fitment for your specific vehicle or equipment model.

Global Supply & Distribution

We offer worldwide shipping capabilities to support international B2B buyers. Our distribution network serves major markets across North America, Europe, Asia-Pacific, the Middle East, Africa, and South America. We ensure fast and reliable delivery to major ports and industrial centers, including Los Angeles, Rotterdam, Dubai, Singapore, and Shanghai.

With extensive export experience, we are well-versed in international trade compliance and documentation. We offer flexible shipping options including sea freight (FOB, CIF) and air express to meet your project deadlines. Bulk orders and consolidated shipments are available for volume buyers.

Quality Assurance

This crankshaft is manufactured in ISO-certified facilities in Guangdong, China, adhering to strict quality control standards. Each unit undergoes rigorous testing to ensure it meets OEM specifications for hardness, dimensional accuracy, and balance.

• Testing: A machinery test report is provided to confirm performance parameters. An outgoing video inspection is also available upon request to verify the final product condition.
• Warranty: All crankshafts are backed by a standard 6-month warranty against manufacturing defects.
• Support: After-warranty service includes online technical support to assist with any installation or performance questions.

FAQ

Q: How do I confirm this crankshaft fits my specific engine?
A: Please check the engine model plate on your equipment. This crankshaft is designed for Nissan Machinery K21 and K25 diesel engines. You must also verify the existing part number on your old crankshaft. If it reads 12201-fu400 or 12201-50k00, this is the correct replacement. If you have any doubts, please contact us with your engine serial number before ordering.

Q: What is the recommended installation procedure for this crankshaft?
A: Installation should be performed by a qualified diesel mechanic. Key steps include cleaning the engine block, inspecting main bearing journals for proper oil clearance using plastigauge, applying assembly lube to all bearing surfaces, and torquing main bearing caps to the manufacturer’s specifications. Always use new main bearings and thrust washers during installation.

Q: What maintenance is required after installing a new crankshaft?
A: After installation, follow a strict break-in procedure for the first 50-100 hours of operation. This includes avoiding heavy loads, monitoring oil pressure closely, and performing an initial oil and filter change after the break-in period. Regular oil changes with the correct viscosity diesel engine oil are critical for long crankshaft life. Always inspect the oil for metal particles during routine maintenance.