Grundfos CR 32 Service Instructions Manual page 9

Single chamber
Fig. 17 Single chamber
1. Fit impeller (pos. 49) and press it home.
2. Fit split cone (pos. 49b) and knock it into the impeller hub
using the key for split cone nut.
3. Hold the impeller with the hook spanner. Fit and tighten split
cone nut (pos. 48).
4. Slide bearing ring (pos. 47a) over the split cone nut. It must
engage with the split cone nut.
5. Fit chamber (pos. 3). Turn it so that the holes for straps are
aligned to the fixing lugs for straps on the inlet part.
6. Press the chamber home against inlet part (pos. 44).
7. Fit straps (pos. 26a) and washers (pos. 26c), and cross-
tighten screws (pos. 26b).
9.2 Pump head and shaft seal
1. Replace rubber springs (pos. 60) and O-ring (pos. 37).
2. Fit pump head (pos. 2) on outer sleeves (pos. 55).
3. Fit washers (pos. 66a) and cross-tighten nuts (36).
4. Carefully press shaft seal (pos. 105) down the shaft and in the
pump head.
5. Fit retainer (pos. 58) and cross-tighten screws (58a).
6. Press the pump shaft home and tighten set screws (pos. 113).
7. Lift the pump shaft and insert the adjusting fork between the
shaft seal driver and its retainer. See fig. 18.
Fig. 18 Fitting adjusting forks
9.3 Motor
To prevent the motor from tipping over, hold it
straight when using a lifting device.
Caution
Do not use the lifting eyes of the motor for lifting
the entire pump and motor assembly.
1. With lifting straps that pass through the motor stool, lift and fit
the motor and motor stool (pos. 1a) to the pump head (pos. 2).
Ensure that the motor does not tip and the load is not applied
to the pump shaft.
2. Cross-tighten screws (pos. 28).
3. Fit coupling (pos. 8), according to fig. 19 and 20, and tighten
screws (pos. 9).
Fig. 19 Fitting coupling
Fig. 20 Adjusting coupling
4. Remove the adjusting fork, and place it under one of screws
(pos. 58a).
5. Check that the pump shaft can rotate freely.
6. Fit coupling guards (pos. 7) and screws (pos. 7a).
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