Bezzera Strega lever "jittery"

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Armand

#1: Post by Armand » Dec 28, 2019, 5:57 am

Recently my last part of the lever action on my Bezzera Strega has become "jittery" , I've already tried greasing the bearing but that didn't work

Does anyone have any idea, or a guide to open and clean the group?

espressotime

#2: Post by espressotime » replying to Armand » Dec 28, 2019, 11:30 am

Remove cover,disconnect switch,take off bolts that bind upper and lower group and pull out the spring assembly.
Schakellaartje los dat de pomp bediend( onder kapje),bouten los die groep delen verbinden en groep eruit trekken.

Armand

#3: Post by Armand » Dec 28, 2019, 11:31 am

espressotime wrote:Remove cover,disconnect switch,take off bolts that bind upper and lower group and pull out the spring assembly.
i tried, the little tube that houses the cables for the switch won't budge

erik82

#4: Post by erik82 » Dec 28, 2019, 11:33 am

There's a much easier fix. This just means the seals are out of lube. Turn the machine off and wait for 10 minutes pull the lever all the way down so that the piston is in the upper position. Remove the shower screen and lube the inside of the cylinder. Move the lever up and down a couple of times and your done. Removing the whole piston is for large maintenance but for just lubing the piston this works best and is much easier.
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another_jim
Team HB

#5: Post by another_jim » Dec 28, 2019, 11:44 am

Sweet! Never thought of that.
Jim Schulman

Armand

#6: Post by Armand » Dec 28, 2019, 12:20 pm

erik82 wrote:There's a much easier fix. This just means the seals are out of lube. Turn the machine off and wait for 10 minutes pull the lever all the way down so that the piston is in the upper position. Remove the shower screen and lube the inside of the cylinder. Move the lever up and down a couple of times and your done. Removing the whole piston is for large maintenance but for just lubing the piston this works best and is much easier.
he bedankt, kan ik vaseline gebruiken?

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MB

#7: Post by MB » Dec 28, 2019, 12:35 pm

another_jim wrote:Sweet! Never thought of that.
Don't feel bad, I've pulled the screen and partially pulled the lever on a hot machine to get a little silicone grease up in there, and still didn't think of this. :oops:
LMWDP #472

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MB

#8: Post by MB » Dec 28, 2019, 12:50 pm

Armand wrote:he bedankt, kan ik vaseline gebruiken?
Don't use petroleum products like Vaseline. Use Dow/Molykote 111 O-Ring Silicone Lubricant. You can usually find a small size used for scuba.
LMWDP #472

Armand

#9: Post by Armand » replying to MB » Dec 28, 2019, 1:39 pm

thanks

ilVecchio

#10: Post by ilVecchio » Dec 28, 2019, 1:54 pm

I do this regularly with my Cremina. Doug of Orphan Espresso has even posted a video on this technique.

Joel