Maintenance
Maintenance intervals
31
© Lutz-Jesco GmbH 2018
Subject to technical changes.
181112
BA-10407-02-V08
Motor-driven diaphragm dosing pump
MEMDOS LB
Operating instructions
12 Maintenance
Dosing pumps by Lutz-Jesco are manufactured to the highest quality
standards and have a long service life. Nevertheless, some of their parts
are subject to wear due to operation (e.g. diaphragms, valve seats, valve
balls). This means that regular visual inspections are necessary to ensure
a long operating life. Regular maintenance will protect the dosing pump
from operation interruptions.
DANGER
Mortal danger from electric shock!
Live parts can inflict fatal injuries.
ð
Before carrying out any maintenance work, always disconnect the
dosing pump from the power supply.
ð
Secure the dosing pump from accidental power-up.
ð
The protective conductor (earth) may only be removed during the
last step.
ð
After maintenance work, all earthing measures must be restored.
WARNING
Caustic burns or other burns through dosing media!
While working on the dosing head, valves and connections, you may
come into contact with dosing media.
ð
Wear the recommended personal protective equipment.
ð
Rinse the dosing pump with a medium (e.g. water) which does not
pose any risk.
ð
Release pressure in hydraulic parts.
ð
Before connecting the mains supply, connect the dosing lines.
ð
Check that all the screw connections have been tightened cor-
rectly and are leak-proof.
CAUTION
Danger of personal injury and material damage!
The dosing pump can generate a pressure that is many times the
rated one. The dosing medium can escape in the case of material
failure or wear on the dosing head, the connection pipe or the seals
that are used.
ð
Carry out maintenance work at the recommended intervals.
The following safety instructions apply to potentially explosive atmos-
pheres:
DANGER
Danger to life through explosions!
Sparks may be formed during repair work by contact between tools
or components.
ð
Only use tools which are suitable for use in explosive risk zones 1
and 2.
DANGER
Danger to life through explosions!
Friction in parts of the dosing pump or system which are made of
non-conducting plastic, can cause electrostatic charging.
ð
Clean plastic parts carefully with a damp cloth.
DANGER
Danger to life through explosions!
The dosing pump can run hot if there is not enough oil. This could
result in explosions occurring in explosive risk areas.
ð
Regularly check the oil level.
ð
If oil is leaking, the leak must be immediately fixed and the dosing
pump taken out of operation.
12.1 Maintenance intervals
This table gives you an overview of maintenance work and the intervals
at which you must carry it out. The next few sections contain instructions
for carrying out this work.
Maintenance work to be carried
out
Frequency
Check the oil level in the oil level
glass
Regularly
Change the oil
n
Change the first filling after
5,000 operating hours or 1
year, whichever comes first.
n
A further oil change after
10,000 operating hours or 2
years, whichever comes first.
Check that piping is seated firmly
Regularly
Check that suction and pressure
valves are seated firmly
Regularly
Table 26: Maintenance information and maintenance intervals