CATEngine Parts

142-5868 Crankshaft Seal — Cat 3408 C13

This crankshaft seal is designed to prevent oil from leaking out of the engine's crankcase while keeping contaminants from entering the crankcase. It is manufactured to meet stringent OEM quality standards, ensuring superior sealing performance compared to a worn or damaged seal. Operators may notice oil spots under the machine, a persistent burning oil smell, or a drop in oil level if this seal begins to fail.

Crankshaft Seal – Part No 142-5868 – 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 and Steel
ApplicationEngine Crankcase
Service LifeReplace every 4,000 hrs or as needed
CompatibilityCAT 3408, 3406C, C13, C15, 777E, 74
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing crankshaft seal is often a small oil leak around the crankshaft pulley or flywheel housing. If left unaddressed, the leak will likely worsen, leading to significant oil consumption and potential lubrication issues. Continued operation with a severely leaking seal risks oil starvation, which can cause severe engine damage.

Installation Tip

Ensure the crankshaft surface is perfectly clean and free of any burrs or imperfections before installation. Avoid using excessive force or sharp tools when seating the seal, as this can easily damage the sealing lip.

Service Note

Inspect the crankshaft for any scoring or wear at the seal contact surface, and check the condition of the front and rear main bearing seals.