REC124411-01780 Crankshaft Rear Seal | Compatible with Yanmar 4LH/6LY Engines | OEM 124411-01780 Replacement

Heavy-Duty Rear Main Seal for Yanmar Marine Diesels

The REC124411-01780 is an OEM-equivalent crankshaft rear seal designed for Yanmar 4LH and 6LY series marine engines, providing superior oil containment for high-performance diesels.

✔ Key Features

• Direct OEM Replacement: Matches Yanmar #124411-01780 specifications

• Marine-Grade Materials: Viton® sealing lip with stainless steel garter spring

• Triple-Lip Design: Enhanced protection against oil leaks

• Corrosion-Resistant: Special coating for saltwater protection

• High-Temp Stability: Withstands continuous operation up to 150°C

🔧 Compatible Yanmar Models

4LH Series:
4LH-DTE/-DTZ/-HT/-HTE/-HTZ/-HTZAY
4LH-ST/-STE/-STZ/-STZAY/-TE/-UT/-UTZ/-UTZAY/-WST/-WSTZY
4LHA-DTE/-DTP/-DTZE/-DTZP/-HTE/-HTP/-HTZE/-HTZP/-STE/-STP/-STZE/-STZP

6LY Series:
6LY-ST/-STE/-STM/-STZY/-UT/-UTE/-UTM/-UTZY/-WST/-WSTZY/-WUT/-WUTZY
6LY2-ST/-STE/-STP/-STVY/-WDTZY/-WST
6LY2A-STE/-STP/-UTP
6LY2M-WDT/-WST
6LY3-ETP/-STP/-UTP
6LYA-STE/-STP/-UTE
6LYM-STE/-UTE/-UTEHD

⚙ Technical Specifications

• Part #: REC124411-01780

• Seal Type: Radial shaft seal

• Material: Viton® rubber with stainless steel spring

• Dimensions: [Include OD/ID/Width if available]

• Weight: 0.07 kg

• Package Size: 11.5 × 11.5 × 1.5 cm

🛠 Installation Notes

1. Clean crankshaft surface thoroughly (use Scotch-Brite™ if scored)

2. Lubricate seal lip with clean engine oil before installation

3. Use proper seal driver tool (Yanmar SST-009 recommended)

4. Replace wear sleeve if present (check part #124411-01781)