Yanmar 4TNE88 Engine Water Pump 729428-42004 129002-42004 | Heavy Duty Diesel Parts

Product Details

Product Overview

This premium Yanmar water pump is a direct replacement for the 4TNE88 industrial diesel engine, ensuring efficient cooling system performance for excavators, generators, and agricultural machinery. Designed to meet OEM specifications, this component is essential for maintaining optimal engine temperature and preventing overheating in demanding work environments. We ship globally to major markets including North America, Europe, Asia-Pacific, and the Middle East, with expedited delivery to key ports and industrial hubs.

Key Features & Benefits

• OEM-Grade Quality: Manufactured to match Yanmar’s original specifications for perfect fit and function.
• Superior Durability: Features a robust cast iron housing and precision-engineered ceramic seal for extended service life.
• Corrosion Resistance: Coated impeller and housing resist rust and scale buildup, ensuring consistent coolant flow.
• Direct Replacement: Bolts directly onto the 4TNE88 engine block without modifications, saving installation time.
• Thermal Efficiency: Designed to maintain optimal engine operating temperature, reducing wear on critical components.

Technical Specifications

OEM Cross-Reference

This water pump replaces the following genuine Yanmar part numbers:

• Primary OEM: 729428-42004
• Alternate OEM: 129002-42004

Compatible with Yanmar 4TNE88 and 4TNE88-T (turbocharged) engine variants. Always verify your engine serial number for perfect compatibility.

Compatibility

• Engine Models: Yanmar 4TNE88, 4TNE88-T
• Vehicle/Equipment Applications: Yanmar B50 excavators, VIO series mini-excavators, industrial generators, agricultural tractors, and marine auxiliary engines
• Year Range: 2005–2025 (verify with engine serial number)

Global Supply & Distribution

• Worldwide Shipping: Standard and express options via DHL, FedEx, UPS, and sea freight (FOB/CIF)
• Major Markets Served: USA, Canada, Mexico, Brazil, Germany, UK, France, UAE, Saudi Arabia, Japan, China, Australia, South Africa
• Fast Delivery: 3–5 business days to major airports/ports; 7–15 days for sea freight to industrial centers
• Export Experience: Over 10 years of international trade compliance, with proper documentation (commercial invoice, packing list, COO)

Quality Assurance

• Manufacturing Standards: ISO 9001:2015 certified facility; each unit tested for flow rate and pressure resistance
• Certifications: CE, RoHS compliant; meets Yanmar aftermarket quality benchmarks
• Warranty: 12-month replacement warranty against manufacturing defects
• Testing: 100% run-in test on each pump before packaging; includes leak test at 2 bar pressure

FAQ

Q1: Is this water pump a direct fit for my Yanmar 4TNE88 engine without modifications?
Yes, this pump is designed as a direct OEM replacement. It matches the original bolt pattern, inlet/outlet diameters, and mounting flange. No additional adapters or modifications are required. Always ensure your engine is a 4TNE88 or 4TNE88-T variant.

Q2: What is the recommended installation procedure for this water pump?
Drain the coolant completely, remove the drive belt and fan, then unbolt the old pump. Clean the mounting surface thoroughly, apply a thin layer of gasket sealant (if using a paper gasket), and install the new pump with new bolts torqued to 25 Nm (18 ft-lb). Refill with fresh coolant and run the engine to check for leaks.

Q3: How often should this water pump be replaced on a 4TNE88 engine?
As a preventive maintenance measure, we recommend replacing the water pump every 1,500–2,000 operating hours or every 2–3 years, whichever comes first. This interval may shorten in harsh environments with high dust or extreme temperatures. Regular inspection for coolant leaks, bearing play, or noisy operation is advised.