Yanmar 4TNA78 4D82 3TNE84 4TNE84 Engine Water Pump 129107-42002 129150-42000

Product Details

Product Overview

This high-quality Water Pump is a direct replacement for various Yanmar industrial diesel engines, including the 4TNA78, 4D82, 3TNE84, and 4TNE84 models. Designed for superior coolant circulation, this component ensures optimal engine temperature regulation, preventing overheating and extending engine life. We are a global supplier, shipping to major markets in North America, Europe, Asia-Pacific, and the Middle East, ensuring fast delivery to ports and industrial centers worldwide.

Key Features & Benefits

• Precision Engineering: Manufactured to meet or exceed OEM specifications for a perfect fit and reliable performance.
• Durable Construction: Features a robust cast-iron housing and a high-quality bearing system for long service life under demanding conditions.
• Leak-Proof Design: Equipped with a premium mechanical seal to prevent coolant leaks and maintain system pressure.
• Direct OEM Replacement: Matches the exact dimensions and bolt patterns of the original Yanmar part, ensuring easy installation.
• Enhanced Cooling: Optimized impeller design provides maximum coolant flow for efficient heat dissipation, even at low engine speeds.

Technical Specifications

OEM Cross-Reference

This water pump is a direct replacement for the following Yanmar OEM part numbers:

• Yanmar 129107-42002
• Yanmar 129150-42000

Alternate/OEM Cross-Reference Numbers: 129107-42001, 129150-42001 (Please verify application before purchase).

Compatibility

This water pump is designed for the following Yanmar industrial diesel engine models:

• Yanmar 4TNA78
• Yanmar 4D82
• Yanmar 3TNE84
• Yanmar 4TNE84

Typical Applications: These engines are commonly found in agricultural tractors, construction machinery (mini excavators, compact loaders), generators, and industrial pumps. Please confirm your engine model before ordering.

Global Supply & Distribution

We specialize in the global supply of high-quality engine parts. Our logistics network ensures fast and reliable delivery to:

• North America: Los Angeles, Houston, New York, Toronto
• Europe: Rotterdam, Hamburg, Antwerp, Felixstowe
• Asia-Pacific: Shanghai, Singapore, Tokyo, Sydney
• Middle East & Africa: Dubai, Jeddah, Durban

We offer flexible shipping options including sea freight, air freight, and express courier services. Our team handles all export documentation and customs clearance procedures to ensure a smooth transaction.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001 certified facilities.
• Testing: Each unit undergoes rigorous pressure and flow testing before shipment.
• Certifications: Complies with industry standards for material composition and performance.
• Warranty: Backed by a 12-month warranty against manufacturing defects.

FAQ

Q1: How can I be sure this water pump fits my Yanmar engine?

A1: Please verify your engine model number (e.g., 4TNA78, 4TNE84) and the OEM part number currently installed. This pump is a direct replacement for Yanmar 129107-42002 and 129150-42000. If your engine is a 4D82 or 3TNE84, it is also compatible. We recommend checking the impeller diameter and mounting bolt pattern against your original part for absolute confirmation.

Q2: What is the recommended installation procedure?

A2: 1) Drain the coolant and remove the fan belt and fan. 2) Disconnect the coolant hoses and remove the old water pump. 3) Clean the mounting surface thoroughly. 4) Apply a thin layer of gasket sealant (if no gasket is provided) and install the new pump. 5) Torque bolts to the manufacturer’s specification (typically 20-25 Nm). 6) Reinstall the fan, belt, and hoses. 7) Fill with coolant and check for leaks after running the engine.

Q3: How long does the water pump typically last, and what are signs of failure?

A3: A quality water pump can last 50,000 to 100,000 hours under normal operating conditions. Common signs of failure include: coolant leaking from the weep hole, a noisy or wobbly bearing (grinding or squealing sound), engine overheating, or visible rust and corrosion on the pump housing. Regular inspection of the coolant level and belt tension can help prolong pump life.