CATFuel System

3S8336 Plunger & Barrel Assy — Cat Engine: D336

This is a precision-engineered plunger and barrel assembly, a critical component within the fuel injection system responsible for accurately metering and delivering fuel under high pressure to the engine cylinders. It is manufactured to exacting standards to ensure consistent fuel delivery and atomization, unlike worn units which develop internal leaks and inconsistent spray patterns. Operators may notice rough idling, loss of power, or increased exhaust smoke as indicators of a worn plunger and barrel assembly.

Plunger & Barrel Assy – Part No 3S8336 – CAT Spare Part
Part Specifications
BrandCAT
CategoryFuel System
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

ipt>

Related CAT Parts

From the same category — may also be needed

6H3364
Service Group
1908970
Pump Gp-Fuel Priming
7C6591
Lines Gp-Fuel Injection
4W7022
Nozzle As-Fuel Valve
1291351
Nozzle As-Fuel Valve
6G9333
Cap-Filler

Browse all CAT Fuel System →

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

Use clean, filtered fuel — fuel injection components have micron-level tolerances. Prime fuel system before cranking to avoid dry-start damage. Replace fuel filter whenever servicing injection components. Calibrate injectors after replacement if equipment has ECU.

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

Part TypePlunger and Barrel Assembly
MaterialHardened steel alloy
ApplicationFuel injection pump
Service LifeReplace as a set when worn or damaged
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early symptoms of a failing plunger and barrel assembly include uneven engine running, misfires, and a noticeable reduction in power. If ignored, fuel consumption may increase, and exhaust smoke can become excessive. Continued operation risks uneven cylinder loading and potential damage to other fuel system components.

Installation Tip

Ensure all internal fuel injection pump passages are thoroughly cleaned before installing the new assembly to prevent contamination. Be extremely careful not to drop or damage the plunger during handling, as it is a precision-matched component.

Service Note

When replacing the plunger and barrel assembly, it is crucial to inspect and replace the fuel injection pump seals and gaskets to prevent leaks.