Too little water coming from grouphead?

#1: Post by **misterpieter** » June 26th, 2012, 2:48 pm

i am not completely sure, but sometimes it seems my grouphead gives too little water.
So i would like to know how much water the grouphead must give in a period of time, so i can check it..
If there is a problem, i' m practically sure it is the knob of the steam wand, that gets 'stuck' between giving water and brewing. (if i jiggle with it, it seems that more water comes out)

(Maybe ahead of time) but if this is the problem, can anybody tell me which part i have to fix?

BEZZERA BZ09:
http://www.bezzera.it/en/component/phoc ... d0212rev00

thanx

#2: Post by **cafeIKE** » June 26th, 2012, 4:08 pm

According to the manual, the machine uses an Ulka EX5

This image shows the unrestricted flow for an Ulka E5 pump