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ME 1C
ME 1
➨
Note position and alignment of valves (D). Remove the valves.
+
Replace valves if necessary.
+
Use petroleum ether or other industrial solvent to remove deposits. Do
not inhale vapors.
➨
Remove the head cover (E).
+
Check diaphragm (G) for damage and replace if necessary.
D
D
E
E
➨
Lift diaphragm carefully sidewise.
+
Never use a pointed or sharp-edged tool to
lift the diaphragm.
➨
Use the diaphragm key to grip the diaphragm
support disc (H) below the diaphragm. Press
down the diaphragm clamping disc (F) to
bring the diaphragm into its lower turning
point position.
➨
Press the diaphragm key against the diaphragm clamping disc and un-
screw diaphragm support disc (H) with diaphragm (G) and diaphragm
clamping disc (F).
➨
Check for washers (I) between the diaphragm support disc (H) and
the connecting rod (J). Make sure that the original number is reas-
sembled.
+
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.
+
If the old diaphragm is difficult to separate from the diaphragm support
disc, immerse assembly in naphtha or petroleum ether. Do not inhale
vapors!
Replacing the diaphragm
G
F
MZ 1C
D
D
E
