4tn100 Second-hand Crankshaft 11901-22001 123900-21010 for Yanmar Engines Repair Parts

Product Details

Product Overview

This high-quality 4TN100 Crankshaft (Part Numbers: 11901-22001 and 123900-21010) is a precision-engineered replacement component specifically designed for Yanmar diesel engines. As a critical rotating assembly in the engine block, this crankshaft converts the linear motion of the pistons into rotational torque, directly impacting engine performance, balance, and longevity.

Sourced from, this crankshaft is manufactured to OEM specifications, ensuring a reliable fit and function for your Yanmar 4TN100 engine. It is commonly used in a wide range of heavy-duty applications including construction machinery, industrial equipment, agricultural tractors, generator sets, marine propulsion, and material handling equipment. Whether you are performing a complete engine overhaul or a targeted bottom-end repair, this part provides the structural integrity required for demanding work environments.

Please verify your existing part number (11901-22001 or 123900-21010) against your engine’s specifications before ordering to ensure correct fitment.

Key Features & Benefits

• OEM-Spec Dimensions: Manufactured to standard OEM size, this crankshaft guarantees precise main bearing and connecting rod journal diameters for proper oil clearance and reduced friction.
• Durable Construction: Built from high-strength alloy steel to withstand the torsional stress and cyclical loading typical of diesel engine operation, ensuring a long service life.
• Rigorous Testing: Each unit is subject to a machinery test report and video outgoing inspection to verify dimensional accuracy and surface finish before shipment.
• Direct Replacement: Designed as a direct drop-in replacement for the Yanmar 4TN100 engine, minimizing downtime during repair or rebuild projects.
• Versatile Application: Suitable for a broad spectrum of industries including construction, agriculture, marine, and power generation, making it a versatile stock item for repair shops and dealers.
• Secure Packaging: Packed securely in a plastic bag, box, and carton to prevent damage during transit and storage.

Technical Specifications

OEM Cross-Reference

This crankshaft is a direct replacement for the following original Yanmar part numbers:

• 11901-22001
• 123900-21010

If your engine uses either of these numbers, this component is the correct replacement. Always cross-reference your original part number to confirm compatibility.

Compatibility

This crankshaft is commonly used for the following engine and equipment types:

• Engine: Yanmar 4TN100 (Diesel)
• Applications: Construction machinery (e.g., mini excavators, compact loaders), Industrial engines, Agricultural tractors and implements, Generator sets (Genset), Marine propulsion systems, and Material handling equipment (e.g., forklifts).

Note: This part is specifically designed for the 4TN100 engine block. Please verify your engine model before purchase.

Global Supply & Distribution

supplies this Yanmar 4TN100 crankshaft to a global network of B2B buyers, including heavy equipment dealers, engine rebuild centers, and repair workshops. We offer reliable worldwide shipping with fast delivery to major ports and industrial hubs.

• Major Markets Served: North America (USA, Canada), Europe (Germany, UK, Netherlands), Asia-Pacific (Japan, South Korea, Australia), Middle East (UAE, Saudi Arabia), and Africa.
• Logistics: We partner with major freight carriers to ensure secure, trackable shipping via air, sea, or express courier.
• Export Compliance: We have extensive experience in international trade and can assist with customs documentation and compliance for smooth global transactions.

Quality Assurance

Quality is paramount in engine component manufacturing. This crankshaft is produced under strict quality control standards to ensure reliability and performance.

• Testing: Each crankshaft undergoes a Machinery Test Report and a Video Outgoing Inspection to verify key specifications and surface quality.
• Warranty: Backed by a 6-month warranty against manufacturing defects, providing peace of mind for your repair investment.
• After-Sales Support: Online support is available for any inquiries regarding installation, specifications, or troubleshooting after the warranty period.

FAQ

Q1: How can I confirm this crankshaft fits my Yanmar 4TN100 engine?
A: Fitment is confirmed by matching your original part number (located on the crankshaft itself or in your engine service manual) to either 11901-22001 or 123900-21010. This crankshaft is designed specifically for the Yanmar 4TN100 diesel engine. If your part number matches, it is a direct replacement.

Q2: What should I inspect before installing a used/second-hand crankshaft?
A: Before installation, carefully inspect the main bearing journals and connecting rod journals for scoring, pitting, or excessive wear. Measure the journal diameters with a micrometer to ensure they are within the standard service limits. Also, check the keyway and flywheel flange for damage. Clean all oil passages thoroughly before assembly.

Q3: What is the recommended maintenance after installing this crankshaft?
A: After installation, perform a break-in procedure as recommended by Yanmar for rebuilt engines. Use the correct grade of diesel engine oil and replace the oil filter. Check main bearing clearance with Plastigage during assembly. After initial startup, monitor oil pressure closely and retorque the main bearing caps after a few hours of operation if specified by the engine manual.