Service item Action
Mechanical seal Replace with new seal units.
6.3 Change the oil
A
paraffin oil with viscosity close to ISO VG32 is recommended. The pump is delivered
from the factory with this type of oil. In applications where poisonous properties are of
less concern, a mineral oil with viscosity up to ISO VG32 can be used.
Empty the oil
1. Lay the pump on its side.
Lock the pump with supports to prevent it from rolling over.
2. Remove the oil plug.
3. Remove the oil screw.
There are two oil screws. Either screw can be used for drainage, but it is easier to
drain the oil if both oil screws are removed.
CAUTION: Compressed Gas Hazard
Air inside the chamber may cause parts or liquid to be propelled with
force. Be careful when opening. Hold a rag over the plug to prevent
liquid from spraying out.
4. Fit the oil drainage tube (optional).
The tube is included with the pump at delivery.
5. Turn the pump so that the oil hole faces downwards and let the oil run out into a
container.
Fill with oil
1. Replace the oil screw O-ring.
2. Put one of the oil screws back and tighten it.
3. Put the corresponding oil plug back.
4. Turn the pump so that the oil hole faces upwards and fill with new oil.
Quantity: 5 L (5.3 qt)
6 Maintenance
Flygt 2190, 2201 Installation, Operation, and Maintenance Manual 33
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