Maintenance
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7.3 Changing the kind of operating fluid
When filling up, topping up or changing the operating fluid, always use the type of oper-
ating fluid indicated on the pump type plate. If, for example, amended process conditions
require the use of a different operating fluid, the fluid can be changed as follows:
Perform two flushing processes with the new operating fluid.
Clean any accessories present such as the ONF/OME or ORF/ODK and replace their
filter elements; pay attention to whether more operating fluid is required.
Fill the pump for the final time with the third filling.
Note down the current type of operating fluid in an appropriate place on the pump
(preferably on the type plate).
NOTICE
Changing the type of operating fluid.
A change of operating fluid type can be only be made between mineral (P3) and syn-
thetic operating fluid (D1). It is not possible to change from these two types to F4/F5 or
the other way round!
For the two flushing processes and final fill, the pump needs to be filled up three times
with fresh operating fluid, and this is the amount of operating fluid required.
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