RHB31 Turbocharger 129403-18050 129137-18050 T190530004 for Yanmar 3TN82 4TN78 Engines

Product Details

Product Overview

This high-performance RHB31 Turbocharger is a direct replacement unit designed for a range of Yanmar industrial diesel engines. Engineered to meet or exceed OEM specifications, this turbocharger is ideal for powering agricultural tractors, construction machinery, and generator sets. We offer global shipping with reliable delivery to major industrial hubs in North America, Europe, Asia-Pacific, the Middle East, and South America, ensuring your heavy equipment stays operational.

Key Features & Benefits

• OEM Direct Replacement: Designed for bolt-on fitment on Yanmar 3TN82 and 4TN78 series engines, ensuring compatibility and reducing installation time.
• Enhanced Durability: Constructed with high-grade cast iron housing and precision-machined components to withstand high exhaust temperatures and demanding operational cycles.
• Optimized Airflow: Delivers precise boost pressure to improve engine combustion efficiency, resulting in increased horsepower and torque output.
• Rigorous Testing: Every unit undergoes 100% balance testing and leak checks to guarantee reliable performance and long service life.
• Cost-Effective Solution: A premium aftermarket alternative to expensive OEM parts, offering significant savings without compromising on quality.

Technical Specifications

OEM Cross-Reference

This turbocharger is a direct cross-reference for the following OEM part numbers, ensuring seamless replacement for your Yanmar engine:

• Yanmar: 129403-18050, 12940318050
• Yanmar: 129137-18050, 12913718050
• Yanmar: T190530004
• Note: Always verify your existing turbocharger model (RHB31) and flange dimensions before ordering.

Compatibility

This turbocharger is specifically designed for the following Yanmar industrial diesel engines, commonly found in agricultural and construction equipment:

• Engine Models: 3TN82, 3TN82TE, 4TN78, 4TN78TL
• Typical Applications: Yanmar tractors (e.g., YM series), mini excavators, forklifts, and generator sets.
• Year Range: Compatible with engines manufactured from the late 1990s through current production models.

Global Supply & Distribution

• Worldwide Shipping: We ship via DHL, FedEx, UPS, and sea freight to over 50 countries.
• Major Markets Served: USA, Canada, UK, Germany, Australia, Japan, UAE, Saudi Arabia, South Africa, and Brazil.
• Fast Delivery: Stock items are dispatched within 24 hours. Express shipping to major ports and industrial centers takes 3-7 business days.
• Export Expertise: We offer full customs documentation and commercial invoices for hassle-free international trade.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001 certified facilities.
• Testing: 100% factory tested for boost pressure, oil leakage, and rotational balance.
• Warranty: Covered by a 12-month limited warranty against manufacturing defects.

FAQ

Q1: Will this turbocharger fit my Yanmar 4TN78 engine without modifications?

Yes, this is a direct bolt-on replacement for the 4TN78 and 4TN78TL engines. It matches the original mountings, oil feed/drain lines, and exhaust manifold flange. We recommend comparing the gasket pattern with your old unit to ensure a perfect fit.

Q2: What is the recommended oil feed for this RHB31 turbocharger?

For optimal lubrication and longevity, use a restricted oil feed line (if your engine block is high pressure) and ensure the oil drain is free-flowing. We recommend using high-quality 15W-40 or 10W-30 diesel engine oil and changing the oil filter during installation.

Q3: How do I verify if my turbocharger is failing before purchasing a replacement?

Common failure signs include excessive blue or black smoke from the exhaust, a loud whistling or grinding noise from the turbo, loss of engine power, and oil leaks from the compressor or turbine housings. A visual check for shaft play (radial and axial) is also a key indicator.