CATEngine Parts

3687816 Body As-Piston — Cat 772

This piston assembly forms the core component of the engine's power generation system, converting combustion pressure into mechanical force. Manufactured from high-strength alloys and precision-machined to exacting tolerances, it offers superior durability and performance compared to worn or damaged pistons. Operators may notice a loss of engine power, increased exhaust smoke, or unusual knocking sounds from the engine when this component is failing.

Body As-Piston – Part No 3687816 – 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 Assembly
MaterialHigh-strength aluminum alloy
ApplicationEngine cylinder
Service LifeReplace as part of engine overhaul
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

A noticeable reduction in engine power and increased exhaust smoke, often accompanied by a distinct knocking sound from the affected cylinder, are common indicators of a failing piston assembly. Continued operation can lead to excessive oil consumption and potential cylinder wall damage. The risk of severe internal engine damage increases significantly if the issue is not addressed promptly.

Installation Tip

Ensure the cylinder bore is perfectly clean and lubricated with clean engine oil before inserting the piston assembly. Never force a piston into the cylinder; if resistance is met, re-check for obstructions or proper ring compression.

Service Note

Inspect cylinder liners, connecting rods, and piston rings for wear or damage when replacing the piston assembly.