ham Senior Member Joined: 27 Oct 2003 Posts: 27 Location: USA Expertise: I love coffee
Posted Mon Jun 16, 2014, 6:57pm Subject: Re: RPM SPA motor bearing replacement
I think it is a standard bearing size, just go with what is recommended.
I took apart the motor three or four times as I had reversed that inner bearing sleeve, and then thought that I had too much of a rattle, but that turned out to be my new pump making funny noises… Go figure…
Tap the motor apart with a screwdriver or small socket aligned against the vent holes with a hammer to open up a gap. Once you have a small gap, then use the screwdriver to pry the casing apart. You can really lever the casing apart quite easily with a rocking motion between the halves, but be sure to go from point to point around the clock face so that the casing doesn't get cockeyed and jam.
I did not need to use the gear puller, but rather was able to take the bearing off without difficulty. I may have tapped it a couple of times with a screwdriver. When replacing, be sure to note the orientation of the reducer sleeve if any, simply align and put the casing back on. It should all pop into place. There is also a spring washer at the back of the motor to keep the shaft tight. If you had a deep socket, you could conceivably tap the bearing on, but it has to fit just snugly around the inner race or else you could destroy the bearing.
On reassembly, I also shimmed the casing with some cut-in-half thin washers after a couple of trials, as I think the bearing I purchased may have been ever so slightly too short, and the shaft did not turn freely enough.
herman2p Senior Member Joined: 27 Feb 2003 Posts: 49 Location: Los Angeles Expertise: I love coffee
Espresso: Wega Lyra auto, Silvia Grinder: mini mazzer, SS rocky
Posted Mon Jun 23, 2014, 10:33am Subject: Re: RPM SPA motor bearing replacement
Thank you for all the help fixing the motor in my Wega Lyra.
I purchased a pair of vxb 6202z 15mm x 35mm replacement bearings on ebay for ~$5 delivered . Using a set of gear pullers, vice, socket set, and your post as a guide I was able to replace the bearings in my motor in less than an hour. The motor is as quiet as the day it was new!!!
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