sticking pump

[stumpynut]

Just moved house, its been empty for a year and a half. Water was off and heating drained (vokera linea) Anyway, added x100, filled rads and turned on power, all was well for 30 secs then locked out (overheat) Pretty sure its a sticking pump (i thought it span when i turned and bled pump) any ideas how to free it and any thing else worth checking

 

[nickso]

is it turning now?

 

[AlanE]

Or air in system.

 

[stumpynut]

I only used a screwdriver to try to free it (i'll buy a pump tool tomorrow) but its solid. There could still be air in but until i get the pump running i dont really know.

 

[Agile]

(i thought it span when i turned and bled pump) any ideas how to free it and any thing else worth checking

I think you mean "spun" !

But you dont seem at at all sure as you later say its locked solid!

When you have clarified your mind, if its still seized you will have to depressurise the system and remove the pump head and see if you can get it turning by the impeller. A little citric acid in the screw end will help to dissolve the dirt in it.

Tony

 

[stumpynut]

Thanks for the advice (English language also). Agile, i removed the bleed screw and used a screwdriver to turn the impeller and it looked and felt like it span (spun) but obviously it didn't, ive tried all local merchants this morning and none of them carry pump tools so i will try your suggestion.

 

[gas4you]

For how cheap a pump is to buy, it would probably be quicker and cheaper to replace it rather than mess about trying to buy a pump tool and having to change the pump in the end anyway.

 

[stumpynut]

£133 for a pump for this boiler online

 

[gremlin16]

Not too familiar with your boiler, but cant you just fit another pump head on to boiler manifold

 

[stumpynut]

Vokera linea 726 (product No R10020437) I haven't checked to see if another make of pump will fit but at that price i'll definitely be trying

 

[possum_jenkins]

will a grundfos 15-50 not fit this???

 

[stumpynut]

Possibly, i'm not there till 12 so i'll check. Thanks for all input, much appreciated.

 

[Agile]

What is a "pump tool" and what does it do?

Tony

 

[Agile]

I have had pretty much 100% success in freeing seized pumps when using a variety of chemicals to dissolve the dirt.

Tony

 

[stumpynut]

Sorted now, stripped pump and spun the impellor, put back together and ok. After all the palaver it is actually a grunfos 15/50, Tony a pump tool is basically a screwdriver on one end and a long allen key the other, see ebay. Thanks lads.