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4.6 Replacement of basic unit
4.6.1 Dismantling
Slacken the screws, (pos. 7a), and remove them together with the coupling guards, (pos. 7).
Slacken the screws, (pos. 9), and remove them together with the coupling, (pos. 8).
Slacken and remove the screws, (pos. 28).
Carefully lift the motor and the motor stool, (pos. 1a), free of the pump using lifting equipment suitable for the motor size.
Slacken the screws, (pos. 58a), and remove them together with the seal carrier, (pos. 58).
Clean the shaft end. Slacken the three screws, (pos. 113), so that they do not touch the shaft.
The screws should be slackened only so much that the shaft seal can be removed from the shaft.
Loosen the shaft seal, (pos. 105), from the pump head using two screwdrivers. See fig. 3, and pull it off the shaft.
4.6.2 Assembly
Make sure that the shaft end is clean, intact, smooth and without visible scratches.
Apply O-ring grease to the shaft end and the O-ring of the shaft seal, (pos. 105). Press the shaft seal down on the shaft
and against the pump head.
Remove excess grease from the shaft end using a cloth.
Fit the seal carrier, (pos. 58).
Lubricate the screws, (pos. 58a). Fit the screws and tighten diagonally. See 2. Tightening torques and lubricants.
Press the pump shaft home and fasten the shaft seal on the shaft with the screws, (pos. 113). See fig. 1.
Lift the pump shaft and insert the forked distance piece, (pos. H), between the shaft seal, (pos. 105), and the seal carrier,
(pos. 58). See fig. 1.
Fit the motor with motor stool, (pos. 1a), and turn it to the required terminal box position.
Lubricate the screws, (pos. 28). Fit the screws and tighten diagonally. See 2. Tightening torques and lubricants.
Before fitting the coupling, check that the forked distance piece, (pos. H), is still inserted between the shaft seal,
(pos. 105), and the seal carrier, (pos. 58).
Fit the coupling, (pos. 8), on the shaft so that the top of the pump shaft is flush with the bottom of the clearance chamber
in the coupling. See fig. 2.
Lubricate the hexagon socket head screws, (pos. 9). Fit the screws, tighten and leave loose.
Check that the gaps either side of the coupling halves are equal.
Tighten the hexagon socket head screws, (pos. 9), two and two (one side at a time). See 2. Tightening torques and
lubricants.
Pull the forked distance piece, (pos. H), free of the shaft, turn it and store it on the screw, (pos. 58a).
Fit the coupling guards, (pos. 7), and fasten them with the screws, (pos. 7a).
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