page 49 of 58
➨
Position new diaphragm between dia-
phragm clamping disc with square head
screw and diaphragm support disc.
+
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 diaphragm carefully together
with diaphragm clamping disc and diaphragm support disc in the dia-
phragm key.
+
Avoid damage of the diaphragm: Do not excessively bend or crease
the diaphragm.
+
Assemble the original number of washers
between diaphragm support disc and con-
necting rod.
➨
Screw diaphragm clamping disc , dia-
phragm, diaphragm support disc, and wash-
ers to connecting rod.
➨
Optimum torque for the diaphragm support disc: 4.4 ft
.
lb
f
(6 Nm), it is
recommended to use a torque wrench. Attach torque wrench to dia-
phragm key (hexagonal bolt 6 mm wide).
Note: Never use the diaphragm key with any additional tools like tongs
or Allen keys without appropriate torque limitation.
+
Too few washers: The pump will not attain vacuum specification. Too
many washers: Diaphragm clamping disc will hit head cover, causing
noisy operation and possibly causing the pump to seize up.
