Dismantling - St Pump - Grundfos S Series Service Instructions Manual

9.3.11 Removing the lower bearings
1. See section
9.3.10 Removing the
2. Remove the screws (182b).
3. Lower the bearing bracket cover (60) so that it is lying against
the stator.
4. Remove the lower bearing bracket (155) by using a puller.
5. Remove the circlip (188) and the locking ring (197).
6. Remove the ball bearing(s) (153) by using a bearing puller.
7. Remove the circlip (187) and the washer (187a).
8. Remove the bearing bracket cover (60).
9.3.12 Removing the stator
If the stator package is reused the support ring must be placed
below the stator package to avoid break down.
Fig. 18 Removing stator
1. Lift the stator slightly off the floor.
2. Heat the stator housing (55) at the same time with 2 or 3 gas
burners beginning from the bottom edge. See fig. 18.
Make sure you use suitable protection equipment.
3. Carry out the heating as quickly as possible. The stator
package (48) will drop to the floor when enough heat has
been applied.
rotor.

9.4 Dismantling - ST pump

9.4.1 Removing the outlet bowl
1. Secure the pump on vertical from the lifting bracket (190)
position by means of hoist.
2. Remove screws (26) and seat ring (1).
3. Lift carefully the motor (301) together with the impeller (49)
from the outlet bowl (50).
9.4.2 Removing the impeller
1. Place the motor assembly in horizontal position on a firm
workbench or trestle with the impeller facing outward.
2. Support the impeller by means of lifting belt.
3. Loosen the impeller screw (67).
4. Loosen the impeller (49), use pinch bars if needed.
5. Remove the impeller screw (67) including the O-ring (67b)
and the impeller cap (66) including the O-ring 862a).
6. Remove the impeller (49).
7. Remove key (9a).
9.4.3 Draining the oil
See section
9.3.2 Draining the
9.4.4 Removing the primary shaft seal
See section
9.3.3 Removing the primary shaft
9.4.5 Removing the cooling jacket
See section
9.3.4 Removing the cooling
9.4.6 Removing the motor top cover
See section
9.3.5 Removing the motor top
9.4.7 Removing the shaft seal housing
See section
9.3.6 Removing the shaft seal
9.4.8 Removing the secondary shaft seal
See section
9.3.7 Removing the secondary shaft
9.4.9 Removing the upper bearing bracket
See section
9.3.8 Removing the upper bearing
9.4.10 Removing the upper bearings
See section
9.3.9 Removing the upper
9.4.11 Removing the rotor
See section
9.3.10 Removing the
9.4.12 Removing the lower bearing
See section
9.3.11 Removing the lower
9.4.13 Removing the stator
See section
9.3.12 Removing the
oil.
seal.
jacket.
cover.
housing.
seal.
bracket.
bearing.
rotor.
bearings.
stator.
19