CATEngine Parts

86-6939 Fuel Injection Pump — Cat 303 901C

This is a Fuel Injection Pump, responsible for delivering pressurized fuel to the engine's injectors at the precise moment for combustion. It is engineered to meet strict OEM performance standards, ensuring accurate fuel metering and timing, unlike a worn pump that can cause inconsistent fuel delivery. Operators may notice rough idling, difficulty starting, a loss of engine power, or increased exhaust smoke when this pump begins to fail.

Fuel Injection Pump – Part No 86-6939 – 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

;

Related CAT Parts

From the same category — may also be needed

2287696
Hood & Guard Gp
155-5109
Hydraulic Piston Pump
4W2020
Engine Parts Component
305-0325
Compressor
6E3137
Caterpillar Pump Gp. Piston 6E3137
7c3803
Cylinder Head Gasket

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 TypeFuel Injection Pump
MaterialHardened steel and precision components
ApplicationDiesel fuel system
Service LifeReplace as needed based on performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial symptoms of a failing fuel injection pump include intermittent engine stumbling or rough idling, especially under load. If ignored, the pump's ability to deliver adequate fuel pressure will degrade, leading to significant power loss and potentially stalling. The ultimate consequence is the engine's inability to run, requiring towing and extensive repairs.

Installation Tip

Ensure the fuel system is thoroughly purged of air after installation to prevent starting issues. Always use new fuel filters and ensure the fuel supply is clean before and during the installation process.

Service Note

Inspect fuel injectors, fuel lines, and the fuel filter assembly when replacing the fuel injection pump.