Figure 12 Sectional Drawing Mp-F - M&C PSS Series Instruction Manual

To replace the valve plates, proceed as follows:
1. Unscrew the crankcase cover. To do this, loosen the 3
hexagon socket screws F (3 mm spanner).
2. Loosen the four hex socket screws G (3 mm spanner).
3. Remove pressure ring H.
4. Remove upper pump head A.
Caution
Turn pump head A only to the right and
upwards. This prevents the bellows from
loosening from the connecting rod.
O-rings C and valve plates B are freely accessible now.
5. The valve plates and O-rings can now be cleaned or
replaced.
6. Clean valve seats and pump head with an adequate
solvent (e.g. alcohol) and use oil-free compressed air to
remove dust particles from the parts.
After replacing or cleaning the valve plates and O-rings, follow these steps to re-assemble the pump:
1. Insert O-rings C into the grooves, and place valve plates B back into the cleaned valve seats. Make
sure that the valve plates are in the correct position.
Note
2. Install the upper pump head A and then the pressure ring H again. Align both so that the screws fit
into the threads in the housing.
3. Check that the bellows are seated correctly. The bellows must be attached to the connecting rod.
4. Fasten the pressure ring H with the four hexagon socket screws G. First tighten the screws by hand.
Start lightly to tighten one screw. Tighten the opposite screw to the same amount, then select the
adjacent pair. Repeat in the same sequence, going for a hand-tight setting.
36
On the pressure side, the smooth side of Valve B is facing downwards,
and on the suction side the smooth side of Valve B is facing upwards
(operating direction is marked with an arrow on the pump head).
SS-M05_Marine | 1.01.00
A
B
C
F

Figure 12 Sectional drawing MP-F..

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D
E
H
G