Skip to main content ↑ ↓
Topic: Auxiliary Compressor Vibes (Read 546 times) previous topic - next topic

Auxiliary Compressor Vibes

My compressor seems to be louder and vibrates more since I rebuilt it last week.  The only change other than a major rebuild is that I added a washer to each of the four mounting bolts so that now the compressor 's mounting plate is held firmly between the bolt heads and the rubber pads.  When I removed the bolts originally a couple of them weren't tight to the plate but were bottomed-out in the threaded insert inside the rubber pad.  Now everything is tight, but seems like the counter balance isn't performing correctly.

I realize those four rubber pads allow a lot of "bounce to the ounce" but how much compressor vibration is normal?

https://www.youtube.com/watch?v=Eab_beh07HU

Re: Auxiliary Compressor Vibes

Reply #1 –
hmm, I think compressor on mine sort of "floats" on the rubber mounts with the springs on the bolts - you may have yours cranked down too tight, unlikely it is your rebuild, more likely your re-install would be my guess.

Tim Fiedler

Sure Start Soft Start

www.tcerdirect.com generator-gas-prod 630 240-9139
Gen-Pro
Tim Fiedler    2025 LTV Unity MBL on Order
2000 Chevy Tracker 2 Door Convertible 4WD Now lifted 4.5"
1985 Citroen 2CV6 Charleston
Murphy Rebel on wheels with 175HP Titan
Cessna P337
1980 48' Westport MY (!/4 Share)

Re: Auxiliary Compressor Vibes

Reply #2 –
Just lay it in there on foam or carpet. have done that with W/pumps before.
Chris and Tammy White  CDA Idaho
Previous owners 1997 U295 36' 3126 Cat 300 HP Build # 4998
Former Foretravel tech & RVIA certified tech
Former owner Custom Satellite home/RV satellites 
Former owner Vans LTD  van conversions
Unemployed, panhandler, drag racer NHRA #6348

Re: Auxiliary Compressor Vibes

Reply #3 –
Quote from: gracerace –
Just lay it in there on foam or carpet. have done that with W/pumps before.

Do you mean deep-six the rubber pads and use foam or carpet with through-bolts instead?  It's almost like the rubber pads are too long or too soft allowing too much movement, so the compressor really vibrates.  Maybe limiting the amount of travel will be the fix, if I'm reading you right.

Re: Auxiliary Compressor Vibes

Reply #5 –
On our Thomas compressor 2 of the 4 rubber mounts on ours were torn in half, replaced them with new
'02 40' U320t  4010WTFS Build 6036 1 slide
Motorcade # 17841
SKP 151920
Retired truck driver
 5 million miler
Still have itchy feet for travel
 

Re: Auxiliary Compressor Vibes

Reply #6 –
The rubber mounts do wear out.

The idea is to isolate the compressor vibration from the rest of the coach, not necessarily keep it from vibrating.

That said, IIRC the durometer of the OEM ones used doesn't necessarily match the harmonics of the compressor, either. 

Vibration isolation - Wikipedia
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320