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04-16-2021, 05:38 AM
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#1
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Senior Member
Join Date: Jan 2019
Location: Coaldale (Southern Alberta)
Posts: 176
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Welding on RV
Hi just looking for some info on doing some welding on my 5ver. I am planning on disconnecting the 120v shore power and removing the leads from the 12v batteries, also just to be extra careful I'm shutting off all the breakers and the battery disconnect. Do you think that should cover it. Any input would be greatly appreciated. Oh and a fire extinguisher and full supervision by my lovely bride. Thanks!
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 &  Jim & Tovi
2019 Cougar 315RLS w/ Reese Sidewinder pin box
2011 Ram Larime CC 3500 SB 4x4 w/ Reese 5th wheel hitch
Retired-Lovin' 7 Saturdays a week!!
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04-16-2021, 05:42 AM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,314
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Unplugging shore power and disconnected battery lead is enough. Make sure DW has proper eye protection also.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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04-16-2021, 05:50 AM
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#3
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Senior Member
Join Date: Jan 2019
Location: Coaldale (Southern Alberta)
Posts: 176
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Thanks, I will she's got her own welding mask and a sharp eye!
__________________
& Jim & Tovi
2019 Cougar 315RLS w/ Reese Sidewinder pin box
2011 Ram Larime CC 3500 SB 4x4 w/ Reese 5th wheel hitch
Retired-Lovin' 7 Saturdays a week!!
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04-16-2021, 08:06 AM
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#4
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,819
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Quote:
Originally Posted by jim1
Thanks, I will she's got her own welding mask and a sharp eye!
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If I may ask.., what are you welding?..only ask because I have same fifth wheel
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2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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04-16-2021, 01:20 PM
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#5
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Member
Join Date: May 2018
Location: San Ramon
Posts: 75
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I performed some extensive welding mods on my coach and did the same disconnects that you did. I also pulled all the fuses serving everything. If you have an electric over hydraulic brake system Dexter says no welding with their unit installed.
Cheers
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Truck & trailer...yes
They have many features and upgrades, more than I can list, so much, did I mention they are well equipped, I don’t know if I have enough room here....and I really don’t think you care anyway, so nope
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04-17-2021, 04:10 AM
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#6
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Senior Member
Join Date: Jan 2019
Location: Coaldale (Southern Alberta)
Posts: 176
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I built a rear bumper that is welded to the frame and the hitch.
__________________
& Jim & Tovi
2019 Cougar 315RLS w/ Reese Sidewinder pin box
2011 Ram Larime CC 3500 SB 4x4 w/ Reese 5th wheel hitch
Retired-Lovin' 7 Saturdays a week!!
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04-17-2021, 03:58 PM
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#7
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,819
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Quote:
Originally Posted by jim1
I built a rear bumper that is welded to the frame and the hitch.
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Ah ok thanks
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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04-17-2021, 05:00 AM
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#8
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Senior Member
Join Date: Apr 2015
Location: nm
Posts: 1,833
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Keep the ground close to your welding lead, that prevents current from running through your rig.
__________________
2018 1 ton 4x4 c.c standard bed GMC Denali
Anderson ultimate hitch
2015 311 Impact Fusion toy hauler
2018 Milwaukee 8 FLRTU roadglide glide ultra
2018 800 Z force spot BUGGY. 
500 watts of solar enough power for boon docking.
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04-17-2021, 09:50 AM
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#9
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Senior Member
Join Date: Jul 2013
Location: Box Elder
Posts: 2,907
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I had a broken frame on our rig repaired five years ago and didn't have to disconnect anything. The welding was at the pin box area and also in front of the drivers side propane cylinder where the frame broke. The welder/mobile RV repair guy had the ground cable connected close to where he was welding. The third photo where the weld that is circled is where the frame was completely broken in two. That is the heavy beam that goes from one side to the other and transfers the load from the frame where the pin box is to the vertical frame that goes down the the main frame. I'm not sure how we got to the park where I saw the damage without the trailer having more damage than that. He welded cracks around the pin box area just because we had the Filon dropped down and saw some cracked welds.
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Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
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04-17-2021, 10:01 AM
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#10
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,739
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I have welded items on the 3 previous campers without issue. In both cases I never disconnected anytyhing. I ground off a fresh spot on the frame for a good ground as close as possible to the weld then hit that with a little black paint when finished. Never had any issues but also didn't have InCommand or any boards other than the basic fridge,WH, conerter, etc.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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05-22-2021, 11:43 AM
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#11
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Senior Member
Join Date: Jan 2014
Location: Winnipeg, Canada
Posts: 1,196
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Our unfitting company technicians use the following device on the battery when welding on the chassis.
https://www.amazon.ca/OTC-3386-Antiz.../dp/B000F5JLP0
__________________
2018 Jayco Eagle HT 265BHS (previous: 2015 23RB Passport Elite, ProPride)
2015 F250 XLT SB Crew, 6.2l gas
PullRite 16K SuperGlide w/SuperRail
Reese 5th Airborne (bagged) Pin Box
RoadMaster Shock Kit
X-Factor Cross Bracing
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