Adjusting The Impeller Clearance - Grundfos DP 10 Installation And Operating Instructions Manual

Draining of oil
CAUTION
Pressurised system
Minor or moderate personal injury
- As pressure may have built up in the oil
chamber, do not remove the screws
until the pressure has been fully
relieved.
1. Loosen and remove both oil screws to allow all
the oil to drain from the chamber.
2. Check the oil for water and impurities. If the shaft
seal has been removed, the oil will give a good
indication of the condition of the shaft seal.
Dispose of used oil in accordance with
local regulations.
Oil filling, pump lying down
See fig. 13.
1. Place the pump in such a position that it is lying
on the stator housing and the outlet flange with
the oil screws pointing upwards.
2. Fill oil into the oil chamber through the upper hole
until it starts running out of the lower hole. The oil
level is now correct.
For oil quantity, see section
change.
3. Fit both oil screws using the gaskets included in
the O-ring service kit. See section
kits.
Oil filling
Oil level
Fig. 13 Oil filling holes
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 section
change.
3. Fit both oil screws using the gaskets included in
the O-ring service kit. See section
kits.
8.4 Oil check and oil
8.8 Service
8.4 Oil check and oil
8.8 Service

8.5 Adjusting the impeller clearance

For position numbers in brackets, see figs D to F in
Appendix.
Proceed as follows:
DP pumps only
1. Loosen and remove the screws (188c) holding
the inlet strainer (84). Remove the strainer.
All pumps
2. Loosen the locking screws (188b).
3. Loosen the adjusting screws (189) and push the
wear plate (162) until it touches the impeller.
4. Tighten the adjusting screws so that the wear
plate still touches the impeller. Then loosen all
the adjusting screws about half a turn.
Make sure the impeller can rotate freely
without touching the wear plate.
5. Tighten the locking screws.
6. Rotate the impeller by hand to check that it is not
touching the wear plate.
DP pumps only
7. Fit the inlet strainer and tighten the screws
(188c).
See also section 8.6 Cleaning the pump
Fig. 14 Pump viewed from inlet side
housing.
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