CATEngine Parts

3642828 Crankshaft — Cat 312B l 312C

This is a CAT Crankshaft, the central rotating shaft of the engine that converts reciprocating piston motion into rotational torque. It is manufactured to meet high-strength steel alloy specifications, ensuring durability under extreme combustion pressures and loads, unlike worn crankshafts with bearing journal damage or fatigue cracks. Operators may experience severe engine vibration, knocking sounds, or a complete loss of engine power as indicators of a crankshaft issue.

Crankshaft – Part No 3642828 – 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 Alloy
ApplicationEngine Rotating Assembly
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The most immediate symptom of a crankshaft problem is a significant increase in engine vibration, often accompanied by a distinct knocking or grinding noise from the crankcase. If ignored, the crankshaft can fracture or seize, leading to catastrophic engine failure and potentially severe damage to other engine components. This can result in complete immobilization of the equipment.

Installation Tip

Ensure all bearing surfaces on the crankshaft and in the engine block are meticulously cleaned and properly lubricated with assembly lube before installation. Never reuse old main or rod bearing bolts; always use new, correctly torqued fasteners.

Service Note

Replace all main and connecting rod bearings, inspect the oil pump for proper function, and check cylinder liners for wear when installing a new crankshaft.