5. Put the oil screw back and tighten it.
Tightening torque: 10–20 Nm (7.4–15 ft-lbs)
6. Put the oil plug back.
6.4 Replace the impeller
Before you replace the impeller, you must drain the oil in the oil housing. See applicable
steps in Change the oil (page 33).
6.4.1 Remove the impeller, alternative 1
CAUTION: Cutting Hazard
Worn parts can have sharp edges. Wear protective clothing.
Table 3: Applicability
Product code Pressure class Open or closed impeller
2201.020 LT Open
2201.320 MT, HT Open
2201.590 MT, HT Open
2201.690 MT, HT Open
2201.691 MT, HT Open
1. Lay the pump on its side or turn it upside down.
2. Remove the strainer:
a) Remove the nuts.
b) Remove the strainer.
3. Remove the suction cover:
a) Remove the nuts.
b) Remove the washers.
c) Remove the suction cover.
d) Remove the O-ring.
4. Remove the impeller:
a) Remove the impeller nut.
b) Remove the washer.
c) Pull off the impeller.
Use an impeller puller or pry off carefully with two strong screwdrivers or bars.
6 Maintenance
34 Flygt 2190, 2201 Installation, Operation, and Maintenance Manual
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