Changing The Oil - Grundfos UNILIFT APG Installation And Operating Instructions Manual

5. Loosen and remove the screw (188a) and the
locking ring (66) in the shaft end.
Loosen the grinder head
6. Remove the grinder head (45).
Assembly
1. When fitting the grinder head (45), the projections
on the back of the grinder head must engage with
the holes in the impeller (49).
2. Tighten the screw (188a) for the grinder head with
a torque of 10 Nm. Do not forget the lock washer.
3. Fit the grinder ring (44).
4. Turn the grinder ring (44) 15 to 20°
counterclockwise until it is tightened.
5. Tighten the screw (44a) with a torque of 7 Nm.
6. Check that the grinder rotates freely.

8.8 Changing the oil

1. Loosen and remove 4 screws (26) and lift away
the pump base (84).
2. Use a plier to hold the grinder head and loosen
and remove the screw (188a) and the locking ring
(66) in the shaft end.
3. Remove the grinder head (45).
4. Pull the impeller (49) away from the shaft.
Remember to remove and collect the key (9a).
5. Loosen and remove the screw (184b) and lift
away the pump housing.
6. Raise the pump so the shaft end faces upwards.
7. Unscrew and remove the oil plug.
18
Oil plug position
Pos. Description
A Oil plug
B O-ring
8. Tilt the pump to let the oil flow out of the oil
drainage hole and catch it in a tray.
Used motor oil must be disposed of in
accordance with local regulations.
9. Analyse the oil: If any particles of abrasive
materials, for example sand, or water are found in
the oil, we recommend you to check the condition
of the mechanical seal and to have it changed if
necessary at a Grundfos Service Center. In this
case also change the oil with about 140 ml of oil,
type MARCOL 152 ESSO.
10. Add oil using a funnel inserted in the drain hole.
The total amount of oil to use is 140 ml.
11. Mount and tighten the oil plug with a torque of
2.5 ± 0.2 Nm.
12. Reassembly the pump in the reverse order of the
dismantling.
13. Adjust the impeller clearance.
Related information
8.2 Oil
8.6 Adjusting the impeller clearance
A
B