Quote:
Originally Posted by dana mcdaniel
Removed the ac cover this morning to compare our set up to the photos. So, if I understand you replaced the existing cushion washers with softer ones from Isolateit. I looked those up and found three levels of density 30,50,and 70 with 30 being the softest. So, I suppose softest might be quietest.
However the current cushion washers seem soft. These are approximately 1” tall and secured by a metal washer and cotter pin on top. No hard rubber anywhere I saw. Wondering if this system has been in use for a while or if this is a change Dometic has made in the last few years ( our trailer was completed 12/19) in order to try to quiet the compressor rumble. If these stock cushion washers are softer than those previously in use, swapping them out may have little effect. If rotobudds set up is as I have described on our ac I’ll give the washer replacement a try.
Hoping I don’t have to depend on long term hearing loss as the solution. Maybe we are just too sensitive to noise. A real possibility.
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Here's the parts that I've just installed:
Isolate It!: Sorbothane Vibration Isolation Bushing 50 Duro (.25" ID - 1" OD - .6" Deep) - 12 Pack
Isolate It!: Sorbothane Vibration Isolation Washer 50 Duro (.45" ID - 1" OD - .19" Deep) - 12 Pack
They are the softest I've tried so far and the drumming I have when laying in the bed is almost unnoticeable.
As far as the metal washer and safety clip I just left them off because the added bushing that I used cover most of the hole for the clip helped in reducing vibration. I guess I might put a couple of wraps of safety wire thru them. But I've never had a problem with the compressor moving.
Just be aware that you will want to enlarge the hole in the top stock rubber so that the last silicone bushing fits up into it. You don't want any part of the compressor mount touching the mount post.Isolating the compressor won't make a huge difference in noise, just vibration. The noise reduction comes from the addition of the sound proofing.
I was a aircraft mechanic for 45 years so my sensitivity to vibration is much, much, higher than to sound.
My wife is very sound sensitive to sound. Which is why I started this mod, and she says it has made a major improvement.
Let me know if you have any other questions,
Richard Budd