CATUndercarriage

1156428 Piston As — Cat 320B

This Piston Assembly is a core component within the engine's combustion chamber, responsible for converting the pressure generated by burning fuel into mechanical motion. Manufactured to precise tolerances and material specifications, it ensures optimal compression and efficient power transfer, unlike a worn piston which can lead to blow-by and reduced performance. Operators might observe a noticeable loss of engine power, increased exhaust smoke, or rough idling when a piston assembly begins to fail.

Piston As – Part No 1156428 – 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 TypePiston Assembly
MaterialAluminum alloy or cast iron
ApplicationEngine cylinder
Service LifeReplace as part of engine overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing piston assembly can include increased oil consumption and a slight decrease in engine performance. As the wear progresses, the engine may exhibit noticeable blow-by, indicated by excessive crankcase pressure, and rougher running characteristics. Continued operation risks scoring the cylinder wall and potentially leading to more extensive engine damage.

Installation Tip

Ensure the cylinder bore is thoroughly cleaned and inspected for any imperfections before installing the new piston assembly. Always use new piston rings and lubricate them properly before insertion to prevent initial scoring.

Service Note

Inspect cylinder liners, connecting rod bearings, and cylinder walls for wear or damage when replacing a piston assembly.