The correct lubrication is grease for bearings, for example Exxon Mobil Unirex N3,
Mobil Mobilith SHC 220 or equivalent.
d) Fit the suction cover and tighten the screws.
e) Lubricate both threads of the adjustment screw.
Always use a new screw.
f) Fit the adjustment screw into the shaft.
Do not tighten the screw.
g) Adjust the impeller towards the suction cover until the parts touch.
Use a screwdriver or similar in the groove of the impeller.
h) Tighten the adjustment screw.
Prevent the impeller from rotating.
Tightening torque: 22 Nm (16 lbf·ft)
i) Tighten the screw a further 1/8 turn (45°).
j) Check that the impeller can rotate freely.
3. Measure the clearance.
Final clearance: 0.1–0.5 mm (0.004–0.02 in)
6 Maintenance
50 Flygt 3069 Installation, Operation, and Maintenance Manual
EN
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