Maintenance
35
© Lutz-Jesco GmbH 2020
Subject to technical changes.
200318
BA-10491-02-V01
Piston diaphragm dosing pump
MEMDOS KMS LB/LA
Operating instructions
12.4 Diaphragm replacement
1
2
3
5
4
Fig. 19: Diaphragm change 1“ dosing head
Precondition for action:
ü
The pump has been deactivated.
@
Oil collecting pan
Perform the following working steps:
1.
Switch off the pump
2.
Close the valves of the inflow and outflow pipes.
3.
Now drain the oil from the pump.
4.
Remove the valve bolts (3) and the valves and dosing head connec-
tions.
5.
Remove the nut of the dosing head bolt (5).
6.
Press the entire dosing head module downwards and away from the
pump housing in order to remove it. If the dosing head can only be
moved with difficulty or not at all, turn the motor by hand (on the fan
wheel of the electric drive) to lift the piston and thereby to create suf-
ficient space.
7.
Remove the cylinder end cap (4) of the dosing head.
PLEASE NOTE
Damage to the hose diaphragm
Sharp objects can damage the diaphragm during installation and dis-
assembly.
ð
Do not use any sharp objects such as a screwdrivers.
8.
Press the diaphragm support (2) out of the hose diaphragm (1).
9.
Clean all parts before re-assembly.
i
A slight oil film on the diaphragm and cylinder facilitates
installation of the hose diaphragm. Rotate the hose dia-
phragm in such a way that the high shoulder is directly
adjacent to the opening of the dosing head. The position can
be read off from the material code on the upper side of the
hose diaphragm.
10.
The new hose diaphragm can be installed folded in the lower flange
and pressed through the drill-hole of the dosing head using a blunt
rod.
11.
Re-assemble all the parts in the reverse order.
ü
Diaphragm change finished.
