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pump runs sometimes 10 mins sometimes 2hrs. had one last go for the evening 2 hrs ago i did slacken off those two grub screws though, so as boiler still on fingers crossed-cant believe such a fine line.thanks again though for info.at least everything fully checked/changed.

thanks for info-this is what i thought so today bought new rubber coupling and fan drive and pump drive dogs.fan drive dog sits loose on splines over fan hub so no adjustment-cut rubber(squarely)and other drive on pump slides over flat to a set stop position so i have measured with vernier so...

hi-ok burner-bentone ab-boiler is thorn panda 2 19kw

hi,pump sticks goes out on lock out,sometimes resets and goes after 5/10 mins,sometimes remove pump and work drive back and forth and try again,sometimes remove back of pump blow out and lube(wd40)as working back/forth and refit.then runs for between 10 mins and couple of hours.thanks antony

hi,thanks for reply.had day off (total nightmare).heres what i done-removed old filter at tank and replaced for new after flushing out from tank,through filter housing.blew air line from pipe which connects suction on pump-through to outlet from tank filter,bled nice clean oil into bowl nice...

hi any advice-the danfoss oil pump seized on boiler-picked up new one locally and fitted-ran for 6/8 hrs found on lock out-this one also now seized-filter is spotless-fan drives well(no bearing/shaft wobble).any ideas welcome