The 5573247 Cummins Fuel Pump Tester is a specialized diagnostic tool designed to measure fuel pump outlet pressure on Cummins diesel engines. This OEM service tool supersedes Cummins 3164621 and is used to verify proper fuel pump performance during troubleshooting, engine diagnostics, and fuel system repairs.
The tester connects directly into the low-pressure fuel system, allowing technicians to accurately measure fuel supply pressure produced by the engine-driven fuel pump. Verifying outlet pressure is one of the first diagnostic steps when investigating complaints such as:
- Hard starting
- Low power
- Fuel starvation
- Intermittent loss of power
- Low fuel rail pressure diagnostic codes
Unlike replacing components based on symptoms alone, the 5573247 allows technicians to confirm whether the fuel pump is producing pressure within specification before moving on to injectors, pressure relief valves, filters, or high-pressure fuel system components.
This tool is commonly used during:
- Fuel pump performance testing
- Preventative maintenance inspections
- Engine overhaul verification
- Fuel system diagnostics following pump replacement
Because incorrect supply pressure can affect the entire fuel system, accurate testing helps eliminate unnecessary parts replacement while reducing diagnostic time.
Key Features & Benefits
- Designed for Cummins fuel pump outlet pressure testing
- OEM Reference: 5573247
- Supersedes Cummins Tool 3164621
- Accurately measures low-pressure fuel pump performance
- Helps diagnose fuel delivery problems before replacing components
- Reduces unnecessary repairs and diagnostic time
- Heavy-duty construction for professional shop use
Typical Applications
- Fuel pump outlet pressure testing
- Fuel system diagnostics
- Hard-start troubleshooting
- Low power complaints
- Engine overhaul verification
- Fleet preventive maintenance
Why It Matters
Many fuel system problems are incorrectly diagnosed as injector or high-pressure pump failures when the actual issue is insufficient supply pressure from the fuel pump.
Using the 5573247 tester allows technicians to quickly verify fuel pump performance, helping isolate the root cause before replacing expensive fuel system components.