CATFuel System

1908970 Pump Gp-Fuel Priming — Cat 120H 120K

This is a Fuel Priming Pump Group for Caterpillar equipment, responsible for manually or automatically supplying fuel to the injection system during startup or filter changes. It ensures the fuel system is filled and purged of air, allowing the engine to start and run smoothly. A malfunctioning priming pump can lead to difficulty starting the engine, air in the fuel lines, or the engine running erratically due to insufficient fuel supply. Observable symptoms include extended cranking times, the engine failing to start, or sputtering shortly after ignition.

Pump Gp-Fuel Priming – Part No 1908970 – 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.

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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 TypeFuel Priming Pump Group
MaterialCast iron, steel, and seals
ApplicationEngine fuel system
Service LifeReplace when priming function is compromised or leaks occur
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The most common initial symptom of a failing fuel priming pump is an inability to start the engine after a filter change, requiring excessive manual priming. If the pump is weak, the engine may crank for a long time before starting or may sputter and stall shortly after ignition. The critical risk is being unable to start the equipment when needed, leading to operational downtime.

Installation Tip

Ensure the fuel system is properly bled of air after installing the new priming pump; failure to do so can result in starting difficulties. Do not overtighten the mounting bolts, as this can distort the pump housing.

Service Note

Inspect the fuel lines connected to the priming pump for any signs of cracking or leaks during replacement.