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➨
Disassemble the housing cover to check
the diaphragm and the valves.
➨
Unscrew four Allen screws with a 5 mm
wide Allen key. Remove the housing cover
with housing cover insert together with the
head cover and the valves (head cover with
valves will remain within the housing cover).
+
Never remove parts by using a pointed or sharp-edged tool (e.g., screw
driver). We recommend to use a rubber mallet or compressed air (to
be blown carefully into port).
➨
Remove the head cover carefully from the housing cover. Note the
position and orientation of the valves and remove them.
+
Replace valves if necessary.
+
Check diaphragm for damage and replace if necessary.
+
Use petroleum ether or industrial solvent to remove deposits. Do not
inhale vapors.
Replacing the diaphragm
➨
Lift diaphragm carefully sidewise.
+
Never use a pointed or sharp-edged tool to
lift the diaphragm.
➨
Use the diaphragm key to grip the dia-
phragm support disc below the diaphragm.
➨
Unscrew diaphragm support disc with dia-
phragm and diaphragm clamping disc.
+
If the old diaphragm is difficult to separate from the diaphragm support
disc, immerse assembly in naphtha or petroleum ether. Do not inhale
vapors!
➨
Check for washers between the diaphragm support disc and the con-
necting rod. Do not mix the washers from the different pump heads,
since these are set at the factory to ensure proper pump performance.
Make sure that the original number is reassembled at the individual
pump head.
