BRIEF INFORMATION
Fuel Feed Units and component parts

➔ High quality standards

➔ Fits to a large scale of applications

➔ Designed to be easily mounted

FURTHER PRODUCT FEATURES AND FUNCTIONS

➔ The fuel pump is an integral part of the fuel delivery system of a vehicle

➔ Supplies the fuel from the fuel tank to the engine

➔ It is located inside the fuel tank or under the chassis, depending on the application

➔ Performance: operates at higher speeds and draws less current than older style pumps

➔ Advantage: each fuel feed unit comes together with the gasket

Full assembly

Fuel Feed Unit

When it comes to fuel pumps and feed modules, customers expect goods of the highest quality. With HELLA, workshops can rest assured that they will meet even the most discerning demands of their customers.

Sub-components

Swirl pot, fuel pump

In order to always ensure an optimum fuel supply, even on bends or on uneven roads, HELLA’s fuel tanks are equipped with a swirl pot. Thanks to its opening at the bottom, this cup-shaped tank ensures an uninterrupted flow of fuel.

Fuel pump

An engine is only as reliable as the fuel pump that supplies it with gas. The HELLA fuel pump is part of the fuel supply unit which operates in the tank. It ensures an absolutely reliable fuel supply at all times – and this is the case in a great number of widely differing vehicle makes and models.

Sender Unit, Fuel tank

The three most important parts of the fuel supply unit are the fuel pump itself, the fuel filter and the flange with its appropriate connections. The supply unit often has a lever sensor or it operates in conjunction with an immersion tube sensor. The unit can be fitted with a swirl pot.

TECHNICAL DETAILS

Technical Data 
Operating voltage12 V
CurrentBetween 5 A and 9 A
Delivery quantities (flow rate)Between 60 and 250 l/h
Fuel-system pressureBetween 3 and 5 bar (300 to 500 kPa)

GENERAL INFORMATION

What are the most common causes of fuel pump failures?

One of the top causes of fuel pump failure is contamination. This can be caused by dirt and debris entering the system from re-fuelling or the use of poor quality fuel. Fuel pump overheating and wear can also cause failure.

 

Driving frequently on a low fuel tank can accelerate wear on the fuel pump due to debris in the bottom of the fuel tank being disturbed and entering the pump. It is interesting to note that over half of all fuel pump replacements are the result of misdiagnosis.

The complexity of modern vehicles leads to several systems that can disable the vehicle’s fuel pump. Systems that one would not normally associate with the fuel system now have the ability to render the fuel pump inactive (e.g. security, drive train, oil/fuel pressure switches, etc.), which can result in a misdiagnosis.

 

Vehicle symptoms that indicate the fuel pump may need to be replaced

➔ Difficult or non-starting

➔ Extended cranking

➔ Immediate or intermittent stalling

➔ Rough idle

➔ Poor acceleration

➔ Severe engine lag

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