What is a diesel pump?
A diesel pump is a vital component in the fuel supply system of diesel engines, which is responsible for supplying fuel (diesel) at the appropriate pressure to the engine. These pumps are usually used in heavy machinery, automobiles, and diesel devices (including mining machinery, road construction, trucks, agriculture, etc.).
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Symptoms of diesel pump failure:
The diesel pump in mining machinery (such as loaders, excavators, bulldozers, dump trucks, etc.) plays a vital role in supplying fuel to heavy diesel engines. Symptoms of a diesel pump failure can vary. Due to the high working pressure and harsh working conditions, these pumps may have more specific or severe symptoms than those of ordinary cars.
Symptoms of a diesel pump failure in mining machinery:
Loss of power and strength in work operations:
– Noticeable decrease in pulling power, slowing down of arms, or lack of proper hydraulic response.
– Low acceleration or inability to climb steep slopes.
Increased fuel consumption:
– A pump failure can cause irregular or excessive fuel injection, which will increase fuel consumption abnormally.
Thick black or blue smoke from the exhaust:
– Incomplete combustion due to insufficient or excessive diesel fuel.
– Usually more severe at high operating pressures (such as heavy loading).
The engine will not start or will be difficult to start, especially in the cold:
– At low temperatures, weak pumps cannot provide sufficient initial pressure for starting.
Engine jerking, vibrating or running erratically at low rpm:
– Abnormal vibration, especially when loading or lowering the booms.
Fuel leaking from around the pump or fittings:
– In mining environments, excessive shock or vibration can damage the hoses or pump body.
Abnormally high engine temperature:
– A failure in the fuel system can indirectly cause the engine to overheat.
Error codes (in modern machines):
– New machines usually have an ECM system that records a fault code in the event of a problem with the fuel pump.
To troubleshoot the diesel pump of mining machines, you must proceed carefully and step by step, because these devices are usually expensive and sensitive. Below are the steps for troubleshooting and fixing a diesel pump failure:
Steps to fix a diesel pump failure in mining machinery:
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Initial and visual inspection of the pump:
– Check for fuel leaks around the pump and connections.
– Check for cracks, breakage or looseness of screws and fasteners.
– Check the condition of the diesel filter (it may be clogged and the pump is healthy).
Check the sound of the pump during operation:
– Unusual noise (such as howling or rattling) is a sign of internal damage such as wear of the blades or shaft.
– Electronic pumps usually have a soft operating sound.
Pump Pressure Test:
– Use a fuel pressure gauge.
– Pressure lower than the standard means the pump is worn or damaged.
– The standard pressure number varies depending on the type of machine and engine (for example, Caterpillar engines are different from Cummins).
Check the fuel supply line:
– Check the hoses and pipes for blockages, kinks, or leaks.
– The problem may not be with the pump at all, but with a clogged line.
Check the power (for electric pumps):
– Check the power to the pump with a voltmeter.
– Sometimes the problem is with the fuse, relay or electrical connectors, not the pump itself.
Clean or replace the filters:
– Check the fuel filter, air filter, and even the fuel/water separator.
– A dirty filter can cause low fuel pressure and poor pump performance.
Check the injectors (in some cases):
– If the pump is OK but the engine still doesn’t run properly, the problem may be with the injector nozzles or needles.
Replacing or repairing the pump:
– If the pump is found to be damaged after testing, it must be replaced or rebuilt.
– Mechanical pumps can sometimes be repaired (for example, by replacing the spring, valve, or rotor), but in severe cases they must be replaced.
Fuel System Calibration and Bleeding:
– After installing a new pump or repairing it, you must bleed the fuel system to prevent problems with starting and performance.
– For some devices, a diagnosis and reset of the ECM system is required.
Kavir Machine Espadana Company
In addition to new machinery and parts, Kavir Machine Espadana Company also offers used road construction and mining machinery with warranty and after-sales service, which are as follows:
Everdigm hydraulic hammer, Loader, Excavator, Dump truck, Lift truck, Backhoe, Drill Wagon , Grader , Bulldozer and… , contact our experts at Contact .
Kavir Machine Espadana Company is registered in Isfahan Province with the purpose of importing road construction and mining machinery, and is also the only exclusive representative of Hyundai Everdigm Hydraulic Hammer in the entire country. The company’s management, relying on its decades of experience in the field of mining contracting and road construction and civil engineering projects, has expanded its activities in the field of importing and selling road construction and mining machinery, parts and related equipment. Therefore, realizing the lack of quality machinery in the country and despite problems such as sanctions and customs issues, we have started importing machinery directly from reputable global factories. In this regard, we can mention the signing of a cooperation agreement with Sumitomo Japan in 2003, which resulted in the import of the first series of Komatsu zero-ton machines to Iran. We hope that by relying on God Almighty and with the aim of achieving the satisfaction of our dear customers, we will be able to take our firm steps further for the prosperity of our dear Iran.
Kavir Machine Espadana Company Communication Roads
Isfahan, 3rd kilometer of Zob Ahan Road, right side crossing