CATEngine Parts

7n9803 1 Pcs Piston Pin — Cat 3208 SR4

This piston pin is a critical component within the engine's reciprocating assembly, connecting the piston to the connecting rod to transmit combustion forces. It is manufactured to meet stringent OEM material and dimensional standards, ensuring durability and proper fit compared to a worn or damaged pin. Operators may notice excessive engine noise, reduced power, or abnormal oil consumption when a piston pin begins to fail.

1 Pcs Piston Pin – Part No 7n9803 – 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 TypePiston Pin
MaterialHardened steel alloy
ApplicationEngine reciprocating assembly
Service LifeReplace as part of engine overhaul or if wear is detected
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing piston pin may include a distinct knocking sound from the engine, particularly under load. If left unaddressed, the noise will likely increase in severity, and engine performance will noticeably degrade. Continued operation with a compromised piston pin risks damage to the cylinder bore and connecting rod.

Installation Tip

Ensure the connecting rod small end bore is thoroughly cleaned and free of any debris before attempting installation. Avoid forcing the piston pin into place, as this can damage the pin or the rod bore.

Service Note

Inspect the connecting rod, piston, and cylinder liner for any signs of wear or damage when replacing the piston pin.