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Topic: Moderate vibrtatyion with coach stationary, with/without external power on (Read 546 times) previous topic - next topic

Moderate vibrtatyion with coach stationary, with/without external power on

I'm having a vibration problem while stationary with no coach engine or generator running, and no shore power on that must be similar to the vibration some Forum members are having with their inverters and Keurig Coffee machines. I have a 2000, U-320 with a Pro Sine. I first encountered the problem about 9 day ago enroute to the FMCA rally at Perry. I plugged into shore power at an RV park, coach engine off, generator off, and when the shore power kicked in, I turned the battery charger on, but not the inverter. After a period of time I felt this vibration that I had not been aware of.  I check around the coach and could feel it in the ground, and it was somewhat similar to the vibration the generator makes just after a cold weather start.  I turned off the charger, then the shore power and then the DC switch by the entrance stairs, but the vibration would not stop (inverter switch was not on, and refrigerator was off). I finally gave up, tuned shore and DC power, refrigerator and charger back on.  I finally got to sleep and when I woke up the next morning, the vibration had stopped.  For the past 7 days I've been running on generator or batteries, starting the gen several  times during the day and the coach engine every other day, and using the inverter when I needed to, but no more vibration. Started home today, pulled into an RV park tonight, shut down the coach and generator, plugged into shore power, turned on battery charger and refrigerator after the shore power came up, and went to dinner. When I returned, I noticed the vibration was back. Again, I turned off shore power, DC power at the stair switch,  unplugged coffee machine and portable oven and turned off the frig.  Vibration is still there, although somewhat less intense.  Any suggestions?
Dan
2000 U320 40'

Re: Moderate vibrtatyion with coach stationary, with/without external power on

Reply #1 –
Is it your aux compressor running (to help maintain level)?
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

Re: Moderate vibrtatyion with coach stationary, with/without external power on

Reply #2 –
Satellite dish searching?
John Duld
1995 U320C SE 40'

Re: Moderate vibrtatyion with coach stationary, with/without external power on

Reply #3 –
I think you need to start over and tell us what is vibrating,the coffee maker,the inverter, the whole coach or what.Do you hear a
vibration or feel one?Open all your basement doors and try and pinpoint the "vibration".The only things that can be vibrating
are things that move.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Moderate vibrtatyion with coach stationary, with/without external power on

Reply #4 –
I would go with Michelle's Aux air compressor as the source. Go open your bay door and listen if you feel it.
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon

Re: Moderate vibrtatyion with coach stationary, with/without external power on

Reply #5 –
Do you feel it in the ground outside?  Could it be from an outside source?
Tom Lang K6PG (originally  KC6UEC)
and Diane Lang
2003 38 U295 build 6209
2016 Jeep Grand Cherokee Summit Ecodiesel
still have tow-ready 2006 Acura MDX 
Temple City, California
Motorcade 16681 California Chapter President
SKP 16663 member of SKP Park of the Sierra, Coarsegold California
FMCA F071251
Retired electrical and electronic engineer

Re: Moderate vibrtatyion with coach stationary, with/without external power on

Reply #6 –
Quote from: kinger65 –
...I check around the coach and could feel it in the ground...
If the OP was parked anywhere in Texas, he might be experiencing the mini-quakes believed to be caused by FRACKING.  No, I'm not joking...
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Moderate vibrtatyion with coach stationary, with/without external power on

Reply #7 –
Might also check if the cooling fan in the inverter compartment is running, ours is mounted to the ceiling of that compartment and sometimes when it runs we get a vibration
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins