Servicing a mechanical fuel pump

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Remove the screws holding the top of the pump to the body

Remove the top of the pump first. It is held on by a central bolt or screw, except on the SU AUF 700, which is held by three screws that also partly hold the halves of the body together.

Do not clamp a pump in a vice to dismantle it — the pressure could break the alloy casting.

Hold the halves together while removing the body screws.