CATUndercarriage

2979155 Piston — Cat 320C 320D

This piston is a critical component of the engine's combustion system, forming the movable base of the cylinder where fuel is ignited. It is manufactured to meet stringent OEM material and dimensional standards, ensuring optimal sealing and heat transfer compared to a worn piston with reduced compression and increased oil consumption. Operators may observe a loss of engine power, increased exhaust smoke, and audible knocking sounds when a piston begins to fail.

Piston – Part No 2979155 – CAT Spare Part
Part Specifications
BrandCAT
CategoryUndercarriage
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

Cross-reference part number with serial number before ordering to confirm fitment. Keep original parts until new ones are confirmed correct. Record part numbers replaced for future reference.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeEngine Piston
MaterialCast Aluminum Alloy
ApplicationEngine Cylinder
Service LifeReplace based on engine overhaul schedule
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of piston failure include a noticeable decrease in engine power and increased fuel consumption. As the damage progresses, the engine may begin to consume excessive oil, leading to blue exhaust smoke, and audible knocking noises from the affected cylinder. Continued operation with a failing piston risks severe cylinder wall and crankshaft damage.

Installation Tip

Ensure the cylinder bore is thoroughly cleaned and inspected for any scoring before installing the new piston. Avoid forcing the piston into the cylinder bore, as this can damage the piston skirt or the cylinder walls.

Service Note

Always inspect cylinder liners, connecting rod bearings, and piston rings for wear when replacing pistons.