Maintenance and Servicing
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P1700040
6.3.4 Frequency of Oil Changes
The oil change interval is completely dependent upon the running conditions of temperature, operating
pressure, hours of daily operation, and upon the materials pumped. Clean, dry air at pressures below
0.7 mbar (50 mtorr) are the most forgiving conditions. To determine your own oil change interval,
visually monitor the pump oil conditions at regular intervals. If you suspect harsh operating conditions,
daily visual checks are recommended. When the oil becomes cloudy, dark or includes particles of
solids, it is time to change the oil.
Be sure to use only Directorr
™ Premium vacuum oil. The ultimate pressure guarantee applies only if
this oil is used!
6.4 Shaft Seal Replacement
When the shaft seal in the mounting plate shows signs of excessive oil leakage, it should be replaced.
Before attempting replacement of the seal, the pump must be disconnected from the vacuum system
and from the power outlet. A seal replacement kit is available. This kit contains the outer lip seal
assembly and gasket, which can be replaced in the field.
See chapter 10 “Overview of Spare Parts”.
6.5 Major Factory Repair
Repairs and maintenance going beyond the extent of the work described in the previous chapters or
reconditioning or modification may only be performed by the manufacturer or authorized workshops.
Drain the oil before dispatching the pump and dispose of the oil according to the regulations.
The prerequisites for a handover are a complete and factually correct damage report, and a clean
pump. Clean the pump aggregate and the pump casing after pumping media which are harmful to
health and the environment. Fill up with sufficient oil to protect against corrosion during transport!
For more detailed information please visit our webpage:
If you should not have an entrance to the Internet, you can contact us via phone:
Europe: +49 3677 604 0
Americas: +1 847 676 8800
Asia: +86 21 5186 0238
WARNING!
Incomplete or incorrectly completed damage reports may endanger the service
personnel!
Provide full information about contamination and clean the pump thoroughly before
handing it over to third parties. The user shall be liable for the consequences of an
incorrect damage report or a contaminated pump. The statements in the damage report
are legally binding.
