Dismantling The Pump - Grundfos MTR 15 Service Instructions Manual

4.2 Dismantling the pump

4.2.1 Removing the motor, coupling and shaft seal
1. Remove the screws pos. 7a together with the coupling guards pos. 7.
2. Remove the screws pos. 9 together with the coupling halves pos. 10a and the shaft pin pos. 10.
3. Remove the screws pos. 28.
4. Lift the motor off the pump head pos. 2.
5. Slacken the three screws of the shaft seal pos. 113 by approx. ¼ of a turn.
6. Slacken the shaft seal pos. 105 using the ring insert tool for shaft seal
free of the pump head.
7. Pull the shaft seal off the shaft.
4.2.2 Dismantling the chamber stack
1. Remove motor, coupling and shaft seal, see
2. Place the shaft holder
3. Remove the nuts pos. 36 together with the washers pos. 66a.
4. Remove the straps pos. 26a, the strainer pos. 84 and the inlet parts pos. 44 and 121.
5. Loosen the chamber stack with a light blow and pull it off.
6. Fit the shaft pin pos. 10 into the shaft pin hole, place the chamber stack in the shaft holder
tighten the vice.
7. Remove the nut pos. 122, the washer pos. 66 and the splined clamp pos. 64c.
8. Remove the chamber stack parts: impellers, spacing pipes, chambers and bearing rings.
9. Remove the driver pos. 61.
10. If the neck rings pos. 45 in the chambers are worn, remove them by pressing off the retainer for neck rings
using the puller for neck ring
11. MTR 15 and 20:
If the wear rings of the impellers pos. 49a are worn, remove them with the puller for neck ring
12. Remove the gasket pos. 37.
4.2.1 Removing the motor, coupling and shaft seal
pos. A in a vice, but do not tighten the vice.
Fig. 4 Fitting the chamber stack in the holder
pos. C.
pos. B
# / 18
until the thread is completely
pos. A and
pos. C.