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

Product Details

Product Overview

This heavy-duty water pump, identified by OEM numbers 129107-42002 and 129150-42000, is a critical cooling system component designed for Yanmar industrial diesel engines. It is engineered to provide reliable coolant circulation for engine models commonly found in construction, agricultural, and material handling equipment.

Specifically compatible with the Yanmar 4TNE84, 4TNA78, 3TNE84, and 4D82 engine series, this water pump ensures that your machinery maintains optimal operating temperatures under demanding working conditions. As a direct OEM replacement part, it offers a precise fit and restores the cooling efficiency required to prevent overheating and engine damage.

Key Features & Benefits

• Precision Engineering: Manufactured to meet strict OEM specifications, ensuring a direct bolt-on replacement without the need for modifications.
• Enhanced Durability: Constructed with a robust cast-iron housing and a high-strength bearing assembly to withstand the vibrations and thermal stress of continuous operation.
• Leak-Proof Seal: Features a premium mechanical seal designed to prevent coolant leakage, protecting your engine from premature wear and corrosion.
• Optimal Coolant Flow: The impeller is precisely balanced to deliver consistent water flow, maintaining the engine’s ideal temperature range for maximum fuel efficiency and power output.
• Versatile Application: Suitable for a wide range of equipment including excavators, generators, tractors, forklifts, and marine auxiliary engines powered by the listed Yanmar models.
• Cost-Effective Solution: Offers a reliable alternative to expensive dealer parts without compromising on quality or performance.

Technical Specifications

OEM Cross-Reference

This water pump directly replaces the following genuine Yanmar part numbers. Please verify your existing part number to ensure compatibility.

• Yanmar OEM: 129107-42002, 129150-42000
• Alternative Numbers: 119660-42000 (Check for specific application)

Note: Always cross-reference with your engine’s serial number or the part removed during disassembly for the most accurate match.

Compatibility

This water pump is commonly used for the following Yanmar engine models and their applications:

• Engine Models: 4TNE84, 4TNA78, 3TNE84, 4D82
• Typical Applications: Compact excavators, mini loaders, agricultural tractors, forklifts, generator sets, and marine auxiliary engines.

Global Supply & Distribution

We are a dedicated supplier of aftermarket heavy-duty engine parts with a robust global distribution network. We ensure fast and reliable shipping to major industrial centers worldwide, including:

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

We handle all export documentation and comply with international trade standards to ensure a smooth customs clearance process. Bulk orders are available for distributors and repair shops.

Quality Assurance

Every water pump undergoes rigorous inspection to guarantee performance and reliability. Our quality control process includes:

• Testing: Each unit is tested for rotational balance and seal integrity. Video outgoing inspection is available upon request.
• Certifications: Our manufacturing facility follows ISO-compliant production standards.
• Warranty: We offer a 1.5-year warranty against manufacturing defects. After-warranty online support is also provided to assist with any technical queries.

FAQ

Q: How can I confirm this water pump fits my specific engine?
A: Check the part number stamped on your existing water pump. If it matches 129107-42002 or 129150-42000, this is the correct replacement. Alternatively, verify your engine model (e.g., 4TNE84) and cross-reference with our compatibility list. The engine model is usually found on a data plate attached to the valve cover or engine block.

Q: What are the signs of a failing water pump?
A: Common symptoms include coolant leaks from the front of the engine, a squealing or grinding noise from the pump bearing, engine overheating, or visible rust/corrosion around the pump housing. If you notice any of these, replace the pump immediately to avoid severe engine damage.

Q: Do you recommend any maintenance during installation?
A: Yes. We recommend replacing the coolant, thermostat, and all associated gaskets or O-rings at the same time. Ensure the pump mounting surface on the engine block is clean and free of old gasket material. Tighten the mounting bolts to the manufacturer’s specified torque to prevent distortion or leaks.