We have for sure same pump. I saw your picture.
WISA Audio Pump - Herb Wolfe etc.
I have a picture of the original O-ring. Happy to send the picture if anyone wants. It is light yellow. See through. Plastic, not rubber..
Sincerely,
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I don't know if the green ones in the pic above are original or not because mine were also clear (slightly yellowed from age). I went to my Sears Hardware and tried 3/4 x 9/16 x 3/32 o-rings, but the weight of the pump caused it to contact the mounting base: https://i.imgur.com/7OANV2n.jpg I then tried 7/16 x 11/16 x 1/8 and it looks perfect. Notice the gap between the base and the pump: https://i.imgur.com/Xj26zWr.jpg https://i.imgur.com/a1mhIgw.jpg Noise/vibration seems the same or less than with the original o-rings. I'm not surprised since the originals were pretty hard and did not return to a round shape when removed. dcaudio, I'd buy a set and ship them to you, but they have less than four left! Let me know if you don't have any luck and I can check back later to see if they re-stock. They are pretty bad about restocking, though. You can also try McMaster Carr. They have a huge selection of different materials in this size. |
My WISA pump looks very similar to the one in the web link above. I am looking for the four green O-rings.I just came back from ACE hardware. In the plumbing section they have 3/4 x 9/16 x 3/32 #11 O-ring. from DANCO Inc.I tried on my pump. A bit too noise and an option is everything else fails. Thank you. |
Mine was different. It had 4 holes to accept some sort of rubber feet. Thanks for pointing this out. Upon thinking about it, the 4 holes in the metal frame that are present in your picture....This is where I placed the rubber isolators I found as this part of the structure is lower and is what comes into contact with whatever the unit is placed on. My unit had the O-rings but they were clear and had not broken down. The O-rings allow for the unit to be isolated from the frame structure. |
If the OP's pump is like mine, the rubber pieces are o-rings. It's just a matter of finding the right size. I have a pretty good local o-rings source, so I will see what I can find. This is what the bottom of mine looks like. http://usr.audioasylum.com/images/y2014/10/121198/altec_015.JPG |
Wow, this is pretty incredible. I had one of those break mid LP just three weeks ago! The racket of the pump housing vibrating against the mounting plate was something! After I determined the source of the racket, another one broke. I turned it upside down and placed it on a stack of soft fabric for the time being. If I find replacements, I will let you know. You may want to ask this question in the ET2 tonearm thread. Someone there might know where to get replacements. |