CATEngine Parts

1253005 Crankshaft W/Gear — Cat 320B

This crankshaft with gear is a critical component of the engine's rotating assembly, responsible for converting reciprocating piston motion into rotational force. It is manufactured to meet stringent quality standards, ensuring durability and performance comparable to the original part, unlike a worn crankshaft which can exhibit excessive play and imbalance. Symptoms of a failing crankshaft include abnormal engine noises like knocking or grinding, a significant loss of engine power, and visible oil leaks from the main bearing seals.

Crankshaft W/Gear – Part No 1253005 – 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 Assembly
MaterialForged steel
ApplicationEngine crankshaft
Service LifeReplace based on inspection or major overhaul
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The first sign of crankshaft failure may be a persistent knocking sound from the engine, especially under load. If ignored, this can lead to increased vibration, oil consumption, and potential bearing seizure. Continued operation risks severe internal engine damage, necessitating a complete engine rebuild.

Installation Tip

Ensure the crankshaft is thoroughly cleaned and inspected for any shipping damage before installation. Avoid using abrasive materials when cleaning bearing surfaces, as this can compromise lubrication.

Service Note

Inspect and replace main and connecting rod bearings, as well as the engine oil and filter, when replacing the crankshaft.