Grundfos CR 32 Service Instructions

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4.7 Replacement of chamber stack
4.7.1 Dismantling
Remove the basic unit. See 4.6 Replacement of basic unit.
Slacken the nuts, (pos. 36), and remove them together with the washers, (pos. 66a).
Knock the pump head, (pos. 2a), free of the outer sleeve, (pos. 55), by means of a rubber mallet.
Remove the pump head and the outer sleeve.
Carefully pull the chamber stack, (pos. 80), up and free of the base complete, (pos. 6b).
Remove the O-rings, (pos. 37).
4.7.2 Assembly
Before assembly, clean all parts.
Apply O-ring grease to new O-rings, (pos. 37), and fit the rings in the base, (pos. 6b), and the pump head, (pos. 2a),
respectively. At the same time, replace the four rubber springs, (pos. 60), in the pump head.
Carefully fit the chamber stack into the base, (pos. 6b), and displace the straps 45° in relation to the staybolts.
Fit the outer sleeve, (pos. 55), into the base, (pos. 6b).
Fit the pump head, (pos. 2a), with the air vent screw, (pos. 18), in its previous position.
Fit the washers, (pos. 66a).
Lubricate the nuts, (pos. 36). Fit the nuts and tighten diagonally. See 2. Tightening torques and lubricants.
Continue the assembly. See 4.6 Replacement of basic unit.

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