Installation errors
Inexpert installation or removal of a fuel pump can result in damages to the seal, housing or to electrical or fuel connections.
Tightening without counter-tightening
In type E2T and E3T toothed ring pumps, the mating component is often not countertightened against the pump housing when the fuel connecting line is tightened. This causes the entire pump cover to turn together with the connections in the housing. Consequently, the sealing ring beneath the cover is squashed. The twisting of the pump system often displaces or damages the O-ring that seals the housing from the cover. The pump then leaks from the flanged edge.
Note:
When the connecting line is tightened, the lower hex nut of the fuel pump must be counter-tightened, as otherwise leaks can occur in the fuel pump.
Attention:
Leaky fuel pumps increase the risk of fire!
When the connecting line is tightened, the lower hex nut of the fuel pump must be counter-tightened, as otherwise leaks can occur in the fuel pump.
Attention:
Leaky fuel pumps increase the risk of fire!
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.
Contact corrosion
Incorrect installation or retrofitting can entail the use of material combinations that encourage contact corrosion. For example, the pump housing (aluminium) should not come into contact with galvanised surfaces.If zinc-coated steel clips without insulation are fitted directly to the aluminium body of the pump, for instance, and electrolyte (splash water) is present, contact corrosion may be produced. In the worst case, the pump body can leak due to pitting corrosion.
Attention:
Leaky fuel pumps increase the risk of fire!
