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Ensure that maintenance is done only by suitably
NOTICE
trained and supervised technicians.
The valves and diaphragms are wear parts. If the rated
ultimate vacuum is no longer achieved or in case of in-
creased noise level, the pump interior, the diaphragms
and the valves must be cleaned and the diaphragms and
valves must be checked for cracks or other damage.
All bearings are encapsulated and are filled with long-life
lubricant. Under normal operating conditions, the drive
system is maintenance free.
In demanding circumstances, it may be efficient to
check and clean the pump heads on a regular basis. In
normal use, the lifetime of the diaphragms and valves
is more than 10,000 operating hours.
- Prevent internal condensation, transfer of liquids or
- Carry out maintenance frequently if the pump is ex-
- Regular maintenance will improve the lifetime of the
Service kit for ME 4C NT VARIO ................................................................696864
Service kit for MZ 2C NT VARIO / PC 3002 VARIO ....................................696869
Service kit for MD 4C NT VARIO / PC 3003/3004 VARIO ...........................696870
Service kit for MV 10C VARIO-B / MD 12C VARIO-B /
PC 301x VARIO ...........................................................................................696821
Diaphragm key (width 66 mm) ...................................................................636554
Cleaning and inspecting the pump heads
(pumps NT VARIO / PC 300x VARIO)
page 100 of 129
dust. The diaphragms and valves will be damaged if
liquid is pumped in significant amount.
posed to corrosive media or in case of deposits.
pump and also protect both users and the environment.
Tools required (metric):
- Torx driver T20
- Torx driver T10 (PC 300x VARIO)
- 5 mm wide Allen key
- 2.5 mm wide slotted screwdriver
- Flat pliers
- Diaphragm key width 66 mm
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