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Damage by force

Damaged housing

Improper handling (e.g. dropping) can cause damage to the fuel pump housing. Dropping the pump during assembly can result in cracks in the plastic, for example, causing the fuel pump to leak.

Attention:
Leaky fuel pumps increase the risk of fire!
Housing damaged by force
Housing damaged by force

Damaged connections

During inexpert assembly/removal, connections can be damaged or break off.

Attention:
A leaky fuel connection is an acute fire hazard!
Broken off hose connection
Broken off hose connection
Electrical contacts damaged by force
Electrical contacts damaged by force
All fuel pumps undergo quality controls and function checks at the factory before delivery. Damages such as these could only have occurred later as the result of improper handling.

Damaged filters

In-tank pumps often have a mesh-like filter on the intake side. Some filters have stiffening ribs to make them more sturdy. If inexpertly installed, the filter and any ribs in it may be damaged.

Dirt can penetrate or fragments of ribs in the filter can jam the pump system.
 
Broken stiffening ribs in the filter of an in-tank pump
Broken stiffening ribs in the filter of an in-tank pump
Damaged sieve filter of an E1F vane-type pump
Damaged sieve filter of an E1F vane-type pump

Fluid-level sensor detached from the fuel delivery module

In some fuel delivery modules, the fluidlevel sensor mechanism is equipped with a damping device. This can break if the fluid-level sensor is moved by hand.

Attention:
Never move the arm of the fluid-level sensor by hand. Danger of breakage!
Never move by hand
Never move by hand
Broken off fluid-level sensor
Broken off fluid-level sensor

Bent fluid-level sensor on fuel delivery module

Inexpert installation can lead to a bent fluid-level sensor arm. This can in turn cause the tank indicator to show an incorrect quantity of fuel.

All fuel pumps undergo quality controls and function checks at the factory before delivery. Damages such as these could only have occurred later as the result of improper handling.