Overhaul Rebuild Kit for Yanmar Engine 3TN78 3TN78L Excavator YB221 YB231 YB251

Complete Engine Rebuild Kit for Yanmar 3TN78 & 3TN78L

This Overhaul Rebuild Kit is designed for Yanmar 3TN78 and 3TN78L engines, ensuring superior engine performance and long-lasting durability. Each component meets OEM standards, making it ideal for professional engine rebuilds in excavators and snow blowers.

✅ Fit for Engine Models

• Yanmar 3TN78

• Yanmar 3TN78L

• 3TN78-RJB

• 3TN78L-DWWCH

• 3TN78L-RGN

• 3TN78L-RMCD

⚙️ Applications

• Yanmar Excavators: YB221, YB231, YB251

• Yanmar Snow Blowers: YSR2600, YSR1710, YSR2110H, YSR3000X

📦 Kit Contents

• 1 Set of Overhaul Gasket Kit

• 1 Set Cylinder Liners (Semi-finished product)

• 1 Set Pistons STD

• 1 Set Piston Pins

• 1 Set Snap Rings

• 1 Set Rod Bushings

• 1 Set Piston Rings STD

• 1 Set Main Bearings

• 1 Set Rod Bearings

• 1 Set Thrust Washer

• 1 Set Intake/Exhaust Valves

• 1 Set Valve Guides

• 1 Set Intake/Exhaust Valve Seats

Note: Cylinder liners are semi-finished and require final machining before use.

🔧 Key Features

• Precision-engineered components for OEM fit and function

• Ensures strong compression and reduced oil consumption

• Suitable for Yanmar excavators and snow blower engines

• Built for long-term performance and reliability