CATEngine Parts

3666004 Seal-Crankshaft — Cat 583T 631G

This is a crankshaft seal, a critical component that prevents oil from leaking out of the engine's crankshaft main bearing housing. It is manufactured to meet stringent OEM quality standards, ensuring superior sealing performance compared to a worn or damaged seal which would allow oil to escape. Operators may notice oil spots under the equipment, a persistent burning oil smell, or a drop in oil pressure if the crankshaft seal begins to fail.

Seal-Crankshaft – Part No 3666004 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeCrankshaft Seal
MaterialNBR Rubber
ApplicationEngine Crankshaft Main Bearing Housing
Service LifeReplace every 4,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing crankshaft seal is often visible oil leakage around the crankshaft pulley or under the engine. If left unaddressed, the oil leak will worsen, potentially leading to low oil levels and increased engine wear. Continued operation with a severely leaking seal can compromise engine lubrication and lead to significant internal damage.

Installation Tip

Ensure the crankshaft surface is perfectly clean and free of any burrs or imperfections before attempting to install the new seal. Avoid using excessive force or improper tools, which can easily damage the seal lip during installation.

Service Note

Inspect the crankshaft and the seal bore for any signs of wear or damage, and consider replacing the front crankshaft pulley if it shows signs of damage.