CATEngine Parts

3370872 Crankshaft — Cat 120G 130G

This crankshaft is the central rotating shaft of the engine, converting reciprocating piston motion into rotational torque to power the equipment. Manufactured from high-strength forged steel, it offers superior wear resistance and structural integrity compared to a worn or damaged crankshaft with visible scoring or bearing journal deformation. Operators may experience rough engine running, unusual knocking sounds from the engine block, or a significant loss of power if this critical component fails.

Crankshaft – Part No 3370872 – 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
MaterialForged Steel
ApplicationEngine internal rotating assembly
Service LifeReplace as needed based on condition
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial symptoms of a failing crankshaft may include persistent engine knocking or rattling noises, especially under load. If ignored, this can progress to severe vibration, loss of engine power, and potential catastrophic internal engine damage. Operating with a compromised crankshaft risks extensive and costly engine repairs.

Installation Tip

Thoroughly clean all oil passages in the crankshaft and engine block before installation to prevent contamination. Ensure main bearing caps are torqued in the correct sequence and to specification to maintain proper crankshaft alignment.

Service Note

Always replace the main and connecting rod bearings when installing a new or reconditioned crankshaft.