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Can anybody advise me on the dissassembly of a Grunfos Magna1 pump ?

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Remittub

Hello, I have a Grunfos Magna 1 40-120 F pump which starts making a nasty noise after some time running. I would like the dismantle the impellor area of the pump to inspect the bearing surfaces of the rotor. However, I can't seem to see the way to extract it from the pump head. Can anybody help ?
 
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As above contact technical...

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MAGNA1 D 40-120 F

The MAGNA1 D circulator pump is ideal for basic performance needs in heating and cooling application. The pump offers peace of mind due to the security of supply obtained by having a redundant pump, resulting in improved uptime. The two pumps communicate wirelessly.
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