CATEngine Parts

6138-32-2120lK Komatsu Piston — Cat

This Komatsu piston is a precision-engineered component designed to form the moving seal within an engine cylinder, converting combustion pressure into mechanical force. Manufactured to exacting Komatsu standards, it ensures optimal compression and efficient combustion, unlike a worn piston with scoring or a compromised ring land. Operators might observe increased oil consumption, blue exhaust smoke, loss of engine power, or knocking sounds if a piston is damaged.

Engine Component – Part No 6138-32-2120lK – 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
MaterialAluminum Alloy
ApplicationEngine Cylinder
Service LifeReplace as part of engine overhaul
CompatibilityKomatsu specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

An early sign of piston failure can be a subtle increase in engine oil consumption or a slight loss of power. If the issue progresses, the engine may begin to produce blue smoke from the exhaust, indicating oil is entering the combustion chamber, and audible knocking sounds may develop. Continued operation with a damaged piston risks cylinder wall damage, ring groove failure, and potential engine seizure.

Installation Tip

Ensure the piston rings are correctly oriented and seated in their respective grooves before installing the piston into the cylinder bore. Never reuse old piston rings with a new piston.

Service Note

When replacing pistons, it is essential to inspect the cylinder bores for wear or damage and replace the piston rings and connecting rod bearings.