Fuel pumps
Generator Fuel Pump Repairs
We repair and replace generator fuel pumps on site across Gauteng: lift pumps, electric feed pumps and engine-driven mechanical pumps on diesel sets. A fuel pump repair or replacement typically costs R1,800 to R4,500, and we test the fuel delivery first so you only pay for a pump when the pump has failed.
Callout fee waived when you accept our written quote. 1-year workmanship guarantee. See prices
- Delivery tested first
- Typical repair R1,800 to R4,500
- Lift, electric and mechanical pumps
- Onsite across Gauteng
Testing the pump
How do we know the fuel pump has failed?
We measure fuel delivery at the filter head before we blame the pump. A pump can run and still not move enough diesel, and a blocked filter or an air leak can starve a healthy pump. Testing the delivery tells us which one you have.
A fuel pump repair or replacement typically costs R1,800 to R4,500, depending on the pump type and the engine. We fit the right pump for your engine, bleed the air out of the system and run the set on load to prove the supply holds.
High-pressure injection pumps are a separate, specialised job. If our tests point there, we explain your options and quote it separately. Keep clear of the fuel lines on a running or hot engine, because high-pressure diesel can pierce skin.
What we fix
Fuel pump faults we repair
Lift pump failure
The low-pressure pump that draws diesel from the tank stops delivering, and the engine cranks but will not fire.
Electric feed pump faults
We test the pump’s power supply and relay as well as the pump, because a dead feed looks just like a dead pump.
Weak delivery under load
The set idles but dies or slows when the building connects. We measure delivery when the engine needs the most fuel.
Air leaks on the suction side
A loose joint lets the pump pull air. We find and seal it before we fit a new pump.
Blocked filters and dirty diesel
Dirt and water clog filters and wear pumps. We replace the filters, check the tank and recommend fuel polishing if the diesel is contaminated.
Pump replacement
We fit the correct pump for your engine, bleed the system and test the set on load.
Related Pages
Fuel system, injectors and no-start faults
- Fuel System Repairs Our main fuel service: filters, contamination and polishing
- Fuel Solenoid Repairs The valve that lets fuel through
- Injector Service Spray quality once fuel has arrived
- Contaminated Diesel Water, dirt and diesel bug in the tank
- Cranks But Won't Start Turns over but will not fire
- Starts Then Stops Fires, then shuts down
- Generator Repair Costs Fuel pump and repair price ranges
Common Questions
Questions about generator fuel pumps
How much does a generator fuel pump repair cost?
A fuel pump repair or replacement typically costs R1,800 to R4,500, depending on the pump and the engine. You get a free written quote first.
What are the signs of a failing fuel pump?
The engine cranks but will not start, starts and dies, or idles but loses power when the load comes on. Air or a blocked filter can cause the same signs, so we test before we replace the pump.
What is a lift pump?
It is the low-pressure pump that lifts diesel from the tank and pushes it through the filters to the injection pump. It is a different part from the high-pressure injection pump.
Can a blocked filter look like a bad pump?
Yes. A pump cannot push fuel through a blocked filter, so we change the filters and check for air before we condemn the pump.
Do you repair injection pumps?
We diagnose them on site. Overhaul and calibration need a fuel injection workshop, and we explain the options when our tests point there.
Should I open the fuel lines to check for fuel?
No. High-pressure diesel can pierce skin, and fuel near a hot engine is a fire risk. Leave the fuel checks to us.
How is a fuel pump fault different from a fuel solenoid fault?
The pump moves the fuel, while the solenoid lets it through or shuts it off. A solenoid that stays closed leaves a healthy pump with nowhere to send fuel.
Still unsure what the fault is? Call or WhatsApp 082 057 4605 for onsite diagnosis.
Service Areas
Onsite visits across Gauteng
We come to your generator anywhere in Gauteng, 24/7. Choose your region for local suburbs, call-out details and the faults we see most there.
What to send before we attend
These details help us plan the visit and bring the right parts. Send what you can on WhatsApp; if you can’t find the model number, we still book the visit.
- Location
- The suburb or site, so the visit can be booked in the right area.
- Make and model
- The generator brand and model, if they are known.
- kVA
- The size printed on the data plate.
- Fuel type
- Diesel, petrol, LPG, natural gas, or dual-fuel.
- Controller model
- The module name on the panel, when it is visible.
- Fault or alarm
- What the set does, and any text on the screen.
- Photos
- The generator, the data plate, and the controller or alarm. Send these on WhatsApp.
Book a Visit
Tell us what the fuel is doing
Say whether the set cranks with no fire, dies after starting or fails under load, and mention it if the tank may be contaminated.
- Call
- 082 057 4605
- Message us on WhatsApp
What happens next
- We reply with questions about the generator, or to book a visit.
- A technician comes to you. For a breakdown we arrive within 1 hour.
- The fault is diagnosed on site and you get a written quote. No work starts until you accept it.
Charlie, lead technician: Degree in Mechanical Engineering, Degree in Electrical Engineering, Diesel Plant Fitter. Generator specialists since 2000.