AUF 700 Mechanical Fuel Pump: Dismantling
1
(a) Thoroughly clean the outside of the pump.
(b) Mark parts clearly to facilitate reassembly.
(c) Unscrew the three long screws (
1), No. 10 UNF, retaining the outlet cover (
2).
(d) Remove the outlet cover, sealing ring (
3), and filter if fitted.
2
(a) Unscrew the three short No. 10 UNF body securing screws (1).
(b) Remove the upper body (2).
(c) Remove the combined inlet and outlet valve moulding (3).
Note: The valve is a press-fit in its housing. Sharp tools must not be used and care must be taken not to damage
the fine edge of the larger diameter forming the inlet valve.
3
(a) Release the diaphragm assembly (
1) by tapping out the rocker lever pivot pin (
2) from either direction
using a soft metal punch.
(b) At the same time, hold the diaphragm and rocker lever against spring pressure.
4
(a) Withdraw the rocker lever (
1) and spring (
2).
(b) Withdraw the diaphragm (
3) and spring (
4).
5 (a) The crankcase seal (
2) is held in position by a pressed steel cup (
3) and should only be removed if a
replacement cup is available.
(b) When removing the steel cut, care must be taken not to damage the pump lower body (
1).