Installation, care and maintenance Minex
20
Mount the strainer and the nuts, tightening
torque 22 Nm (16.2 Lbf ft).
Mount the diffuser part.
Tighten the screws, tightening torque 22 Nm
(16.2 Lbf ft).
Lock the impeller with a screw driver or similar
(L= min. 200 mm/7.9 inch), see g., to prevent
rotation of the impeller. Fit the washer and the
greased impeller screw and tighten, torque to 22
Nm (16.2 Lbf ft().
Check that the impeller rotates freely.
When changing an impeller or after service, we
recommend that the screw is rst tightened to
the prescribed torque and then turned an ad-
ditional 1/8 ( 45°) of a revolution. The screw
will be loaded to its yield point and the load
capacity of the joint will be higher.
Using a 8 mm hexagon bit adaptor (allen socket)
with a 100 mm (4”) extension, turn the adjust-
ment screw clockwise until the impeller makes
contact with the suction cover. Tighten it further
1/8 turn, 45
o
. This will ensure the correct clear-
ance between the impeller and the suction cover
in the next step.
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