Unsoldering/Resoldering Help

Post your tech questions here, lots of knowledge available.
Post Reply
logo-3x1-48-Inches-1
Ulfuranda
Super Colemanaholic
Posts: 1119
Joined: Tue Nov 29, 2022 8:23 pm

Unsoldering/Resoldering Help

#1

Post by Ulfuranda »

Hi all,

I am thinking about a little unsoldering & resoldering of a fount that's got a bad seam. And I'd like to do it right ...

(Probably obvious) question -- but I have searched the Forum to no avail. I promise I did!

What kind of solder should I use? Different for steel founts or brass founts, or the same?

And I assume for unsoldering it's a matter of heat it until it falls apart?

Any tips welcome, with thanks.

Ulf.
ICCC Member #2249
275 Appreciation Syndicate #0262

I love the smell of thorium in the morning.
User avatar
Whitegas Extraordinaire
Super Colemanaholic
Posts: 6478
Joined: Sat Oct 21, 2017 2:11 pm
Title: Indubitably a Colemanholic

Re: Unsoldering/Resoldering Help

#2

Post by Whitegas Extraordinaire »

Ulfuranda wrote: Mon Mar 20, 2023 12:24 pm Hi all,

I am thinking about a little unsoldering & resoldering of a fount that's got a bad seam. And I'd like to do it right ...

(Probably obvious) question -- but I have searched the Forum to no avail. I promise I did!

What kind of solder should I use? Different for steel founts or brass founts, or the same?

And I assume for unsoldering it's a matter of heat it until it falls apart?

Any tips welcome, with thanks.

Ulf.
A image and knowing what your subject is would really help.
Thank you!
Kevin

GPA are the catalyst that brings us all together.
The people you meet and build friendships with are why we stay!


To me a lamp without a shade is creepy!


ICCC # 1865
Majicwrench
Super Colemanaholic
Posts: 6352
Joined: Mon Jul 30, 2012 9:33 pm

Re: Unsoldering/Resoldering Help

#3

Post by Majicwrench »

Pictures of what you are doing always a huge help.
A lantern fount?
Keith
Ulfuranda
Super Colemanaholic
Posts: 1119
Joined: Tue Nov 29, 2022 8:23 pm

Re: Unsoldering/Resoldering Help

#4

Post by Ulfuranda »

Thanks, I'll get some pix today.

U.
ICCC Member #2249
275 Appreciation Syndicate #0262

I love the smell of thorium in the morning.
User avatar
Rfieldbuilds
Super Colemanaholic
Posts: 2513
Joined: Sun Nov 05, 2017 5:12 pm

Re: Unsoldering/Resoldering Help

#5

Post by Rfieldbuilds »

What two parts are you trying to separate?
Randy
Ulfuranda
Super Colemanaholic
Posts: 1119
Joined: Tue Nov 29, 2022 8:23 pm

Re: Unsoldering/Resoldering Help

#6

Post by Ulfuranda »

i have a couple, actually, Randy. one is a pump tube i'd like to get out and the other is the bottom plate of a fount.

thanks!

Ulf.
ICCC Member #2249
275 Appreciation Syndicate #0262

I love the smell of thorium in the morning.
User avatar
Rfieldbuilds
Super Colemanaholic
Posts: 2513
Joined: Sun Nov 05, 2017 5:12 pm

Re: Unsoldering/Resoldering Help

#7

Post by Rfieldbuilds »

Ulfuranda wrote: Mon Mar 20, 2023 1:37 pm i have a couple, actually, Randy. one is a pump tube i'd like to get out and the other is the bottom plate of a fount.

thanks!

Ulf.
I’ve taken out the bottom plate. Its not for the faint of heart.

Pump tube on a Coleman may be lead or copper braze. That may or may not be possible based on if it is copper or lead. Also a tough, but doable transplant.
Randy
User avatar
Gavercronos
Super Colemanaholic
Posts: 1584
Joined: Sun Aug 17, 2014 2:53 pm
Title: Guy Who Does Stuff

Re: Unsoldering/Resoldering Help

#8

Post by Gavercronos »

I typically use regular acid core plumbing solder. I also like to deaden it with inert gas (CO2) on the inside so it doesn't explode. That and/or use a giant soldering iron instead of direct flame. It should go without saying, do this at your on risk- The only things I do it on are either priceless (no replacement available) or worthless (practice) or both, and I always pressure test it to double what I'll ever use it at.
WillCat

Chautauqua County, New York
Slant Saver Image  Frank Maker Image

Wanted: GPA dated 5/89 AND 11/23, 7D Mag-lite, 220/228Cs with dead founts
My greatest fear is Flying Walruses with Tommy guns for Tusks.
User avatar
oldfox66
Super Colemanaholic
Posts: 3447
Joined: Sat Nov 05, 2022 1:13 pm

Re: Unsoldering/Resoldering Help

#9

Post by oldfox66 »

Here is a tip on dealing with gasoline fuel tanks ( this DOES NOT apply to heavy fuel oils like kero or diesel). I have welded on literally dozens of gas tanks- automotive, marine, motorcycle, and small engine and this is how I was taught and do them.

Drain the tank and allow to air dry, now is a good time to rinse and flush with fuel solvent cleaner (I use OilEater) and water. Remove all valves, fittings, caps, etc that may still be on the tank or fount. For the next step it MUST be completely dry inside.

Pass a lit torch over one of the openings- any remaining fumes will ignite and flash off but it won't explode- the tank is open to allow any buildup of pressure to relieve itself! There may be a slight initial 'POOF' but once it does the tank is clear.

Proceed to do your work.
I have done this on tanks from 1/2 gallon to 35 gallons and after a time or two you no longer sweat doing it. Again, you CANNOT use this method with heavy fuel oils, those I always pipe an inert gas into.
Brian

Coleman Slant Saver #71
MilSpec Syndicate #1941
Quicklite Crew #70
Coleman 275 Appreciation Syndicate #0266
BernzOmatic Appreciation Club #041
Frank Appreciation Syndicate #028

Tribal member of the Weredafoxawee Nation
Ulfuranda
Super Colemanaholic
Posts: 1119
Joined: Tue Nov 29, 2022 8:23 pm

Re: Unsoldering/Resoldering Help

#10

Post by Ulfuranda »

Hmm, I’m thinking this one is probably getting well out over my skis. I’m sure there’s someone Out There who does this sort of work professionally and knows what he’s doing … because I sure don’t!

Thanks boys for giving me a sense of what’s involved … I think I know enough to know I don’t know enough!

Ulf.
ICCC Member #2249
275 Appreciation Syndicate #0262

I love the smell of thorium in the morning.
Majicwrench
Super Colemanaholic
Posts: 6352
Joined: Mon Jul 30, 2012 9:33 pm

Re: Unsoldering/Resoldering Help

#11

Post by Majicwrench »

You can make it as complicated as you want, but it doesn't have to be. Soldering is a good skill to learn, not that tough, but like anything takes some practice. Ulf, you seem like a smart cookie, you could do this if you so desired
A good rinse and air dry is fine for a font.

A bad seam? should be fairly simple to re-solder
Keith
Ulfuranda
Super Colemanaholic
Posts: 1119
Joined: Tue Nov 29, 2022 8:23 pm

Re: Unsoldering/Resoldering Help

#12

Post by Ulfuranda »

Thanks for the encouragement, Keith! I can silver-solder reasonably well — learned that when I was working as an auto restorer — but hate to admit that I’ve never done any plumbing soldering. I’ll pull up my drawers and maybe try a practice piece or two!

Ulf.
ICCC Member #2249
275 Appreciation Syndicate #0262

I love the smell of thorium in the morning.
shaune509
Senior Member
Posts: 144
Joined: Sun Sep 08, 2013 10:22 pm

Re: Unsoldering/Resoldering Help

#13

Post by shaune509 »

Ulf, As stated above practice can get you the skill. But if its just one repair that you want to have done right, look up an old school radiator repair shop. They are getting fewer but any large area should have one or two shops. Look for farm, truck and custom repair, wont be cheap but should be well done.
Shaune509
User avatar
hikerduane
Super Colemanaholic
Posts: 6716
Joined: Tue Jul 31, 2012 1:33 am

Re: Unsoldering/Resoldering Help

#14

Post by hikerduane »

Gary at Blue Water Stove Restorations may help. Quality work, may or may not want to help. I've had him fix a few brass stoves. Dean is backed up a couple three weeks.
Duane
ICCC member 2220. Formerly all seasons, year round backpacker and camper.  So many stoves and lanterns, who's counting.
Ulfuranda
Super Colemanaholic
Posts: 1119
Joined: Tue Nov 29, 2022 8:23 pm

Re: Unsoldering/Resoldering Help

#15

Post by Ulfuranda »

Thanks very much guys for the tips, and Duane for the lead at Blue Water. I don't mind waiting. In the meantime I may practice a bit on a throwaway.

Ulf.
ICCC Member #2249
275 Appreciation Syndicate #0262

I love the smell of thorium in the morning.
logo-3x1-48-Inches-1
Post Reply

Return to “Technical Assistance”