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In this Discussion
After the old forum software breaking in a way that we were unable to fix, we've migrated the site to a new platform.
Some elements aren't working as we'd hoped - some avatars didn't survive the transition, and we're still having issues with attachments that weren't added as inline images, but we're hoping to have that all sorted out soon.
Some elements aren't working as we'd hoped - some avatars didn't survive the transition, and we're still having issues with attachments that weren't added as inline images, but we're hoping to have that all sorted out soon.
Sticky pump problem. Easy fix.
I have a roto-flow pump that was extremely 'sticky' in that it was possible to turn it with a spanner/wrench, but far to stiff to turn by hand.
Disassembling the pump proved a challenge as the front plate would not budge using any of the tools on hand, or with a dodgy made up pin wrench made of nails and a block of wood.
I tried putting citric acid through it in the hope that it might be scale which was causing the problem, but no change.
Next step was to try and find some way to make the front plate easier to remove. One week in the deep freeze (forgot about it), then straight out the freezer and applied heat to the front using a kitchen blowtorch. At this stage I meant to have another go with my home made pin wrench, or two drills mounted in a vice to make a pin wrench that fitted the holes perfectly. I was unavoidably distracted and promptly forgot about it yet again.
Picked it up at the weekend when I noticed it on garage workbench and fiddled with the spindle - turned easily.
Pump now runs sweet as a nut and when I hooked it up to my clunker Bezzera, it registered bang on 9 bar.
Not sure if the cold caused expansion of remaining fluid in the pump and freed something up, or if the thermal shock of the blowtorch did the trick, but might be worth a try if you have a stuck pump that is destined for rubbish.
Disassembling the pump proved a challenge as the front plate would not budge using any of the tools on hand, or with a dodgy made up pin wrench made of nails and a block of wood.
I tried putting citric acid through it in the hope that it might be scale which was causing the problem, but no change.
Next step was to try and find some way to make the front plate easier to remove. One week in the deep freeze (forgot about it), then straight out the freezer and applied heat to the front using a kitchen blowtorch. At this stage I meant to have another go with my home made pin wrench, or two drills mounted in a vice to make a pin wrench that fitted the holes perfectly. I was unavoidably distracted and promptly forgot about it yet again.
Picked it up at the weekend when I noticed it on garage workbench and fiddled with the spindle - turned easily.
Pump now runs sweet as a nut and when I hooked it up to my clunker Bezzera, it registered bang on 9 bar.
Not sure if the cold caused expansion of remaining fluid in the pump and freed something up, or if the thermal shock of the blowtorch did the trick, but might be worth a try if you have a stuck pump that is destined for rubbish.
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