Grundfos CR 32 Service Instructions

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4.8 Dismantling of chamber stack
Place the holder for dismantling and assembly, (pos. A), in a vice and tighten it.
Make sure that the ring fitting the inlet part, (pos. 44), is placed in the holder. See 3. Service tools.
When dismantling the chamber stack, use the holder hole marked "Dismantling". See fig. 4.
Fig. 4
Place the chamber stack so that the fixing lugs for straps on the inlet part are above the cutouts in the holder. Make sure
that the chamber stack engages with the holder.
Turn the shaft so that the hole in the shaft and the holder hole marked "Dismantling" are in the same position. Fit the
pin into the hole to hold the shaft.
Slacken the screws, (pos. 26b), and remove them together with the washers, (pos. 26c), and the straps, (pos. 26a).
Dismantle the chamber stack as follows:
Symbols refer to 5. Order of assembly for chambers and impellers.
Loosen the top chamber, (pos. 3), from the chamber/inlet part using a screwdriver.
Hold the impeller with the hook spanner, (pos. N), and slacken the split cone nut, (pos. 48), by means of the key, (pos. I).
Turn the key and knock the nut to loosen the impeller from the split cone, (pos. 49b).
Pull the split cone nut, (pos. 48), the split cone, (pos. 49b), and the impeller off the shaft.
Loosen the chamber, (pos. 4), from the chamber below or the inlet part using a screwdriver.
Hold the impeller with the hook spanner, (pos. N), and slacken the split cone nut, (pos. 48), by means of the key, (pos. I).
Turn the key and knock the nut to loosen the impeller from the split cone, (pos. 49b).
Pull the split cone nut, (pos. 48), the split cone, (pos. 49b), and the impeller off the shaft.
Loosen the chamber with bearing, (pos. 4a), from the chamber below using a screwdriver.
Loosen the bearing ring with driver, (pos. 47a), from the split cone nut, (pos. 48), using a screwdriver and pull it off the
shaft.
Hold the impeller with the hook spanner, (pos. N), and slacken the split cone nut, (pos. 48), by means of the key, (pos. I).
Turn the key and knock the nut to loosen the impeller from the split cone, (pos. 49b).
Pull the split cone nut, (pos. 48), the split cone, (pos. 49b), and the impeller off the shaft.
When the last impeller has been removed, the inlet part can be lifted off the holder.
The chamber stack is now dismantled.
TM01 2050 0998

Grundfos CR 32 Specifications

General

Type	CR
Frequency	50/60 Hz
Protection Class	IP55
Material	Stainless Steel
Applications	Water supply, pressure boosting
Power Consumption	Varies by model