CATEngine Parts

3145005 Piston As — Cat 785

This piston assembly is a fundamental component within the engine's combustion chamber, converting the pressure from burning fuel into mechanical motion. Manufactured to precise specifications, it offers superior strength and wear resistance compared to a damaged or worn piston. Operators may observe a loss of engine power, increased oil consumption, or audible knocking sounds from the engine when this part begins to fail.

Piston As – Part No 3145005 – 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.

WhatsApp for Price & Availability☎ Call Mumbai Office

Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

h before 3 PM IST.', };

Related CAT Parts

From the same category — may also be needed

1869285
Engine Parts Component
176-7705
Temperature Sensor
1243524
Piston As
421-5481
Hydraulic Oil Filter
1289278
Arm Cylinder Seal Kit
5w-5890
Air Filter

Browse all CAT Engine Parts →

Ship This Part To Your Location

DubaiSaudi ArabiaNigeriaKenyaSouth AfricaBangladeshMalaysiaGhanaQatarEgypt
India
MaharashtraGujaratTamil NaduRajasthanKarnatakaTelangana

Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

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 Assembly
MaterialForged aluminum alloy
ApplicationEngine combustion chamber
Service LifeReplace during engine overhaul or if damaged
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial symptoms of a failing piston can include a noticeable decrease in engine power and a rougher idle. If the problem persists, oil consumption will likely increase, and a distinct knocking sound may become audible from the affected cylinder. Continued operation risks severe cylinder wall and crankshaft damage.

Installation Tip

Ensure the cylinder bore is perfectly clean and lubricated before inserting the piston to prevent scoring. Always install new piston rings and verify correct ring orientation.

Service Note

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