2. Remove and discard the impeller screw.
3. Remove the suction cover.
If necessary, then pry off the suction cover.
4. Remove the impeller and the sleeve.
6.8.2 Install the N-impeller
1. Before installation of the impeller, push the sleeve to check that it moves freely up and
down.
When the sleeve is released, it must be fully pushed out again. If the sleeve does not
move freely, or does not come fully out, then replace the impeller unit.
2. 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.
6 Maintenance
50 Flygt 3069 Installation, Operation, and Maintenance Manual
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