VACUUBRAND PC 3001 basic pro - Manual (Page 42)

page 42 of 54
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If the old diaphragm is difficult to separate from the diaphragm support
disc, immerse assembly in naphtha or petroleum ether. Do not inhale
vapors!
D
E F
E
F
D
➨
Position new diaphragm (E) between dia-
phragm clamping disc with square head
screw (D) and diaphragm support disc (F).
+
Note: Position diaphragm with pale side
towards diaphragm clamping disc (facing
pump chamber).
+
Make sure that the square head screw of
the diaphragm clamping disc is correctly
seated in the guide hole of the diaphragm
support disc.
➨
Lift the diaphragm at the side. Place the di-
aphragm carefully together with diaphragm
clamping disc and diaphragm support disc
in the diaphragm key.
+
Avoid damage of the diaphragm: Do not ex-
cessively bend or crease the diaphragm.
+
Assemble the original number of washers
(G) between diaphragm support disc (F)
and connecting rod (H).
➨
Screw diaphragm clamping disc (D), dia-
phragm (E), diaphragm support disc (F),
and washers (G) to connecting rod (H).
➨
Optimum torque for the diaphragm support disc: 3 ft . lb
f
(4 Nm).
+
If necessary, put the pumping unit in its upright position to screw the
diaphragm clamping disc to the connecting rod. Subsequently lay the
pumping unit again on its side.
➨
Bring the diaphragms (E) into a position, in
which they are in contact with the housing
(I) and centered with respect to the bore.