Originally posted by Coffeenobs
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Simple VBM Domobar Junior repair
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Most pumps are same . All comes from ulka. The model are all ex5. Some suppliers charges more and some less money. I realize ebay is pretty cheap.
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In your search did you find much difference between ULKA pumps? Does quality vary much vs price?
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Nice work and not too much damage done to the old sky rocket ;-) Well done!
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Simple VBM Domobar Junior repair
Over the past 6 months the ulka vib pump on my VBM would stop infrequently. Normally happened when I was doing my monthly Grouphead chemical clean and rinse, I thought ok pump is 4 years old and poured a lot of coffees, getting a little hot and tripping the thermal protection switch. I will just replace it even though it never had problems getting up to good brewing pressure. Replaced the pump and also installed a Quickmill Pulsar damper.
Fired the machine up, all worked well for a couple of days then problem returned. Dam!!!
Pulled the pump thermal protection switch out and replaced with a bridging wire, machine ran fine for 2 weeks. Ordered and fitted a new thermal protection switch. All is good.
Moral of the story, the solution is not always as obvious as you think.
Also neither item was expensive to replace but there was a huge variation on ulka pump prices, up to 50% difference between suppliers and up to 100% difference on the thermal switch. I also replaced the steam and water tap washers and there was a 300+% difference between some suppliers. All suppliers were in Australia.
Like anything it pays to shop around.
Maurice
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