Posted Sat Apr 23, 2011, 10:24am Subject: O-ring problem with Handpresso
The Handpresso I use when travelling has just broken down on me with an o-ring problem on the piston as you can see on the picture. Unfortunately I got the unit as a gift from a business connection and have no shop to take it back to.
I found another o-ring that looks to be the same size in my toolbox and tried to use this as a replacement but it doesn't work. I am thinking that either my replacement o-ring isn't quite the same size or there is a problem with how I reassembled the piston and replaced the ring. I new a little help from other coffeegeeks - Where are the o-rings placed on a functioning Handpresso? - What are the exact dimensions of those o-rings?
Hopefully with the correct size ring placed properly I can get my mobile espressobrewer running again.
short Senior Member Joined: 20 Jul 2011 Posts: 1 Location: ZŁrich Expertise: I live coffee
Posted Wed Jul 20, 2011, 5:08am Subject: Re: O-ring problem with Handpresso
I know this problem.
I was using the Machine at work and I drink around four coffees in a day. I've used the machine exactly as shown in the users guide and I donít use it professional. After two months of use (approx. 80 coffees), the machine started to go stronger at pumping. Five coffees later something broke down inside and I couldnít build the pressure anymore. I brought the machine to the seller and he has sent it for repair. I did get it almost three weeks later back and I could use it again. Then, two weeks later, I drank around forty coffees. The Machine broke again the same way. On the Handpresso Website, Iíve found under support a maintenance sheet, which shows that the Machine should be lubricated from time to time with cooking oil. This sheet wasnít in the package that Iíve bought and itís not written how often this should be done. I donít imagine that this has to be done every tenth coffee. I work as a mechanical engineer and I know on what should be paid attention, when using an O-ring. A good lubrification, a good quality O-ring and the right surface is a must for moving parts. The O-Ring is only a NBR and the surface is not made for moving O-Rings.
I begin to think, that the Handpresso is only externally well fabricated, that much Marketing and Commercials have been done and on the inner parts they tried to save money.
Since a half year I'm using the mypressi twist (http://mypressi.com/). The coffee ist much better then with handpresso and I'm quite content with it. I think you should give it back and let them know, that they have to produce a better quality product.
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