6.7.3 Install the M-impeller
1. Prepare the shaft:
a) Polish off any flaws with a fine emery cloth.
The end of the shaft must be clean and free from burrs.
b) Coat the inner conic and the outer cylindrical surfaces of the sleeve with a thin layer
of grease.
The proper lubrication is grease for bearings, for example Exxon Mobil Unirex N3,
Mobil Mobilith SHC 220 or equivalent.
NOTICE:
Surplus grease can cause the impeller to become loose. Remove surplus grease
from conical and/or cylindrical surfaces of shafts and/or sleeves.
2. Mount the impeller:
a) Insert the sleeve into the impeller.
b) Fit the impeller to the shaft.
c) Coat the cylindrical surface of the pump housing with a thin layer of grease.
The proper 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.
6 Maintenance
Flygt 3069 Installation, Operation, and Maintenance Manual 47
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