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09-06-2018, 09:07 AM
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#1
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Junior Member
Join Date: Sep 2018
Posts: 1
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Loud thud noise
Hearing a loud thud from under RV usually during night time. All four levelers are down. 2017 Fleetwood, Pace Arrow, 38ft.
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09-06-2018, 09:10 AM
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#2
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Senior Member
Join Date: Jul 2014
Posts: 1,536
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Cooling/ expansion/ contraction of sheet metal on sub floor box above the chassis?
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Taking in the sights with our Trolley ...but life is always better under a Palm Tree
2019 Jayco Embark (Entegra) 39T2. - our Trolley
2019Jeep Cherokee Latitude, Western New York
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09-06-2018, 09:19 AM
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#3
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Senior Member
Monaco Owners Club Fleetwood Owners Club
Join Date: Sep 2016
Location: Manitoba, Canada
Posts: 972
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My jacks make noise with temperature changes. Mine sound like a loud thud.
Terry
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2002 Monaco Windsor 40PKD. Marjorie 2.
2015 Equinox V6 Roadmaster tow setup
2019 ALP Adventurer 24DS for the short trips. April, 2021
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09-06-2018, 09:39 AM
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#4
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,794
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Hi !  Welcome to IRV2! We're sure glad you joined the gang! 
Don't have a clue!
Good luck, happy trails, and God bless!  
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Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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09-06-2018, 09:50 AM
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#5
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Senior Member
Winnebago Owners Club
Join Date: Sep 2009
Location: Spring Branch, TX
Posts: 2,987
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When it cools at night one of your jacks (one at a time probably) can see less hydraulic pressure and drop a tiny bit. It does BANG! and in our RV that whole side of the RV will shudder at the same time.
I checked with Power Gear - our leveler manufacturer and they said it's normal. They do have a recommendation on their website that if it's a continuous problem to replace 1/2 of the hydraulic fluid with another fluid. I guess it expands and contracts less. I don't remember what fluid they suggest.
It is possible to be a leaking jack seal too. So, check your jacks for any oil on them. And keep the seals lubed - most have grease fittings.
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2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
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09-06-2018, 10:40 AM
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#6
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Senior Member
Monaco Owners Club
Join Date: Aug 2017
Location: Orlando, Florida
Posts: 5,819
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Quote:
Originally Posted by Jane1969
Hearing a loud thud from under RV usually during night time. All four levelers are down. 2017 Fleetwood, Pace Arrow, 38ft.
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Does it happen every night?
If so, it will be easy to troubleshoot, just leave the jacks up the next night and see if the noise stops
When I saw your post title, the first thing that came to mind was the "thud" I get when I plug into Shore power or shut off Generator. I'm not sure if its the Transfer switch or Inverter (they are located next to each other) but it can be heard from the outside of coach. So I was thinking maybe you have a Shore power issue at night (voltage drop) or due to AC turning on/off or other such change in power demand causing your Inverter or Transfer switch to change modes.
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09-06-2018, 10:46 AM
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#7
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Senior Member
Join Date: Jul 2018
Posts: 4,925
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Quote:
Originally Posted by Jane1969
Hearing a loud thud from under RV usually during night time. All four levelers are down. 2017 Fleetwood, Pace Arrow, 38ft.
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The last time I heard such noise it was a racoon uh... "being friendly" with another racoon.
The expansion/contraction of coach surface areas seems plausible, as does the leveling jacks explanation. Kind of like a big S&B house, settling and dealing with heat expansion.
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2005 Four Winds Majestic 23A
“To the world you may be one person; but to one person you may be the world.” - Dr Suess
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09-06-2018, 12:01 PM
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#8
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Senior Member
Join Date: Jun 2017
Posts: 229
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Quote:
Originally Posted by Solo_RV_Guy
The last time I heard such noise it was a racoon uh... "being friendly" with another racoon.
The expansion/contraction of coach surface areas seems plausible, as does the leveling jacks explanation. Kind of like a big S&B house, settling and dealing with heat expansion.
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Wouldn't that have been more of a thud, thud,thud, thud,?
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09-06-2018, 01:11 PM
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#9
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Senior Member
Winnebago Owners Club
Join Date: Aug 2012
Posts: 465
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I'm with WDW - my ductwork 'thuds' when furnace shuts off and duct contracts.
Skip Y
2010 Journey 40TD, 2015 Equinox
WIT 47083 FMCA F263635
Loc: Mich
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09-06-2018, 08:27 PM
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#10
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Senior Member
Join Date: Mar 2017
Location: Zebulon, NC
Posts: 5,211
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 Welcome to the forum!
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Kelly and Jerry Powell with Halo (Lethal White Aussie), Nash the Rat Terrorist, and now Reid, the "Brindle we have no idea puppy"
2020 Grand Design Solitude 390RK-R
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09-06-2018, 08:37 PM
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#11
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Senior Member
Join Date: Apr 2012
Location: CLEARWATER, FLORIDA
Posts: 1,052
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Just a shot in the dark, but if you have a power problem, the automatic transfer switch will drop out with a "thud". It will also thud when power is restored.
Just a thought...............
Tom
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Tom & Jan ---- Westwing43 (RVM28)
2008 NEWMAR MOUNTAIN AIRE 4528
Pulling a 2014 CHEVY CAPTIVA
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09-07-2018, 08:23 PM
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#12
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Senior Member
Join Date: Nov 2016
Posts: 721
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On our coach the power bay give a thud once and a while. One of the relays is noisy not sure for what. Maybe that's it?
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2011 American Coach, American Eagle 45B with 650hp ISX on a Liberty Chassis K3 with two Vizsla's and two cats.....
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09-07-2018, 08:26 PM
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#13
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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Big Foot?
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Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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09-07-2018, 09:33 PM
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#14
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Senior Member
Join Date: Jan 2011
Location: Wandering below the Gnat Line
Posts: 2,011
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My sides and jacks make noises. Today's thud, however, was a sparrow bouncing off the window. It just happens.
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-jbh-
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