Grundfos SE 12-42 hp Service Instructions Manual page 10

4.3.5 Removing SM 113 and the moisture switch
Maintenance and service work on explosion-proof
FM
products must be carried out by Grundfos or a
service workshop authorized by Grundfos.
1. Remove the screw and washer of the moisture switch (520).
2. Disconnect the moisture switch wires.
3. Disconnect all wires from SM 113. Remember to mark all
wires carefully.
4. Loosen and remove the screws and washers for the bracket of
SM 113, and remove the SM 113 and the bracket.
4.3.6 Removing the cooling jacket ring (only SE pump)
Maintenance and service work on explosion-proof
FM
products must be carried out by Grundfos or a
service workshop authorized by Grundfos.
1. Remove the cooling jacket ring (754) by means of crowbars or
by using the lifting points (if available). See fig. 15.
2. Remove O-rings (157c and 157b).
3. Remove outer cooling jacket (150c).
4. Remove O-rings (37a).
Lifting points
Fig. 15 Lifting points in cooling jacket ring
4.3.7 Removing inner cooling jacket (only SE pump)
Maintenance and service work on explosion-proof
FM
products must be carried out by Grundfos or a
service workshop authorized by Grundfos.
1. See section
4.3.6 Removing the cooling jacket ring (only SE
pump)
2. Remove screws (150d).
3. Remove inner cooling jacket (150b).
10
4.3.8 Removing the impeller and pump housing
1. Remove the outer screws (26).
2. Lift the pump including the impeller (49) out of the pump
housing (50).
3. Remove the O-ring (37b).
4. Place the motor with impeller in horizontal position on a stable
surface.
5. Bend down the tabs on the lock washer (66) and loosen the
impeller screw (67).
6. Remove the impeller screw (67) and the washer (66).
7. Pull off the impeller (49) using a puller. Support the impeller
with a hoist.
Protect the cone of the impeller shaft against
scratches by taping in the cone or protecting it by
other means.
4.3.9 Removing the wear ring
1. Remove the screws (49b).
2. Push out the wear ring (49c) from the pump housing (50).
4.3.10 Removing the lower seal housing
Maintenance and service work on explosion-proof
FM
products must be carried out by Grundfos or a
service workshop authorized by Grundfos.
1. Mount the shaft seal protection tool (C).
Fig. 16 Shaft seal protection tool
2. Remove screws (184b).
3. Gently remove the lower seal housing. You may use crowbars
and a soft hammer.
4.3.11 Removing the intermediate seal housing (only SE)
Maintenance and service work on explosion-proof
FM
products must be carried out by Grundfos or a
service workshop authorized by Grundfos.
1. Remove the three screws (185).
2. Dismantle the intermediate seal housing (58).You may have to
use a soft hammer very gently.
3. Remove the O-rings (37b and 107).