Checking The Shaft Seal; Adjustment Of Impeller Clearance - Grundfos SEG Instrucciones De Instalación Y Operación

Oil filling, pump in upright position
1. Place the pump on a plane, horizontal surface.
2. Fill oil into the oil chamber through one of the
holes until it starts running out of the other hole.
For oil quantity, see table in section
change.
3. Fit both oil screws using the packing material
included in the kit. See section

10.3 Checking the shaft seal

To make sure that the shaft seal is intact, the oil
should be checked.
If the oil is greyish white like milk or contains a large
quantity of water, the shaft seal should be replaced
as the primary part of the seal is worn. If the seal is
still used, the motor will be damaged within a short
time.
If the oil is clean, it can be reused.

10.4 Adjustment of impeller clearance

For position numbers, see figs
Warning
Before inspection, make sure that the
motor is switched off and that the mains
switch is locked in position 0.
To adjust impeller you need to dismantle the grinder
system first:
1. See section
10.2 Oil change.
2. Place the pump in horizontal position on the
table.
3. Remove the screw (188a) from the pump feet
(M).
4. Loosen the grinder ring (44) by knocking it
clockwise with punch. See fig. 13.
Fig. 13 Removing the grinder ring
10.2 Oil
10.5 Service kits.
5 and 6 in Appendix.
5. Remove the grinder ring (44).
6. Insert the punch into the hole to hold the impeller
to prevent it movement during removal.
7. Remove the screw (188a) including washer (66)
from the shaft end. See fig. 14.
8. Remove the grinder head (45).
Fig. 14 Removing the screw and grinder head
9. Tighten the adjusting nut (68) until the impeller
(49) cannot rotate any more.
10. Loosen the adjusting nut (68) by 1/4 turn.
Assembly of grinder system:
1. Fit grinder head (45). The dogs on the back of
the grinder head must engage with the impeller
holes (49).
2. Tighten screw (188a) in the shaft end to torque of
20 Nm ± 2. Do not forget the lock washer.
3. Fit grinder ring (44) and turn grinder ring (44) 15
to 20 ° anti-clockwise until it is tightened.
4. Check that the grinder ring does not touch the
grinder head.
5. Tighten screw (188a) to torque of 16 Nm ± 2.
6. Check that the grinder head rotates freely and
noiselessly.
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