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Crankshaft Front Oil Seal 3904353 for Cummins Engine 6BT 4BT Case MX100 MX120
$24.29
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$24.29
Regular price
Available to Order
This Crankshaft Front Oil Seal is a high-quality aftermarket replacement part compatible with Cummins 6BT 4BT and Case MX100 MX120 and matches OEM Part# 3904353.
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I needed a forklift part and wasn’t sure which one fit. They asked for the model and serial number, got back to me quickly, and made sure I ordered the right one. Really helpful.
Randy W. — Verified customer
Product Overview
This front crankshaft seal is engineered to provide a robust oil barrier for Cummins and Case diesel engines. It prevents oil loss at the front timing cover area, ensuring critical engine components remain lubricated while protecting the assembly from dirt and debris. Manufactured to precise tolerances, it offers a reliable seal for heavy-duty agricultural and industrial applications.
Key Features & Performance
- High-grade elastomeric material ensures long-term resistance to heat and engine oil.
- Precision-engineered for a secure fit that prevents leaks and pressure loss.
- Direct replacement design ensures compatibility with existing engine housings.
- Durable construction withstands the high vibration and thermal cycles of diesel operation.
Fitment & Compatibility
- Cummins Engine 4BT
- Cummins Engine 6BT
- Case IH MX100
- Case IH MX120
Technical Specifications
- Part Number(s): 3904353
- Seal Type: Front Crankshaft Oil Seal
- Material: High-Temperature Resistant Nitrile/Viton Compound
- Application: Diesel Engines
Frequently Asked Questions
- Q: Will this seal stop leaks at the front of the crankshaft? A: Yes, this seal is specifically designed to replace a worn or damaged front seal to prevent oil from escaping the crankcase.
- Q: Is this part compatible with the Case MX series tractors? A: Yes, it is a verified replacement for Case MX100 and MX120 tractors utilizing the Cummins 5.9L or 3.9L engines.
Compatibility may vary by serial number. Verify fitment before purchase.