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#693980 - Thu Sep 07 2017 08:50 PM Straightening a 36B Top....
57-Chevy Offline
Veteran Member

Registered: Fri Oct 13 2000
Loc: Locust, NC
I picked up another Tokheim 36B a few months back. It was leaning over and a tree had grown into the top. It pretty much looked like a lost cause and was bent inward and downward.

This is the second 36B top that I have straightened. I thought I would take a few pics. and share here on oldgas. I hope this will help and encourage someone else to try and save their top. They can be straightened with heat, pressure, and a lot of patience!

1) Build a heavy duty steel support jig.
2) Have lots of clamps, angle, channel, flat bar, etc. on hand
3) Slowly heat the pot metal top. (I used a Reddy Heater)
4) Slowly apply pressure with each carefully placed clamp a little at a time. Don't go too fast. I would move the bent section a little and place back in front of the heat. I was heating it hot enough that it would almost burn you with gloves on. A lot of the car guys say you can work pot metal at about 300 degrees or so.
5) Once straightened, turn off heat and let it cool on its own. I didn't take the jigs or clamps off until a couple days later. The end result speaks for itself, perfect top again! And NO cracks!

Before:





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Description: During:




Edited by 57-Chevy (Thu Sep 07 2017 09:23 PM)

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#693981 - Thu Sep 07 2017 08:52 PM Re: Straightening a 36B Top.... [Re: 57-Chevy]
57-Chevy Offline
Veteran Member

Registered: Fri Oct 13 2000
Loc: Locust, NC
During:


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Description: After:

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#693983 - Thu Sep 07 2017 09:00 PM Re: Straightening a 36B Top.... [Re: 57-Chevy]
petropumps Offline
Veteran Member

Registered: Sat Aug 07 2004
Loc: Oregon
That's amazing. Had no idea you could do that with pot metal.

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#693986 - Thu Sep 07 2017 09:38 PM Re: Straightening a 36B Top.... [Re: 57-Chevy]
Craig Osbeck Offline
Veteran Member

Registered: Tue Jan 06 2009
Loc: Portland Oregon
Good job
_________________________
Craig

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#693988 - Thu Sep 07 2017 09:54 PM Re: Straightening a 36B Top.... [Re: 57-Chevy]
Speedracer Online   content
Petro Enthusiast

Registered: Sat Feb 08 2014
Loc: Michigan, USA (near Chesterfie...
Very, very nice job. Good save.
_________________________
Currently looking for a WHITE STAR Staroleum or Staroline sign and a FILMOIL sign. Send a PM. Thanks.

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#694005 - Fri Sep 08 2017 06:34 AM Re: Straightening a 36B Top.... [Re: 57-Chevy]
RandyM Offline
Petro Enthusiast

Registered: Thu Dec 13 2012
Loc: Wisconsin (South Central)
NOW! That is a great post. Thank you for sharing.
_________________________
Randy

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#694011 - Fri Sep 08 2017 08:15 AM Re: Straightening a 36B Top.... [Re: 57-Chevy]
shavron Offline
Active Member

Registered: Thu Dec 22 2016
Loc: Tennessee
Thank you for posting that. I'm a newbie


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#694013 - Fri Sep 08 2017 08:37 AM Re: Straightening a 36B Top.... [Re: 57-Chevy]
57-Chevy Offline
Veteran Member

Registered: Fri Oct 13 2000
Loc: Locust, NC
Ron, that one can be straightened! Just remember patience!

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#694079 - Fri Sep 08 2017 10:15 PM Re: Straightening a 36B Top.... [Re: 57-Chevy]
tulareone Offline
Petro Enthusiast

Registered: Wed Jun 07 2006
Loc: tulare, ca
Can I just send you mine -- what you charge-- ruben
_________________________
looking for spanish gas signs

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#694107 - Sat Sep 09 2017 06:10 PM Re: Straightening a 36B Top.... [Re: 57-Chevy]
BrianH Offline
Petro Enthusiast

Registered: Sun May 01 2016
Loc: Midland, Michigan
That is nice work. Good job on straightening out the original part without cracking it!

BrianH

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#694160 - Sun Sep 10 2017 02:56 PM Re: Straightening a 36B Top.... [Re: 57-Chevy]
shavron Offline
Active Member

Registered: Thu Dec 22 2016
Loc: Tennessee
I haven't got mine apart, but it should fit into an oven and set it to 300 deg.

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#694168 - Sun Sep 10 2017 03:46 PM Re: Straightening a 36B Top.... [Re: 57-Chevy]
Done4 Offline
Veteran Member

Registered: Mon May 07 2012
Loc: Michigan, Union Pier
Did you get flight control approval on the oven thing? The
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Have gas all the time

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#694177 - Sun Sep 10 2017 05:53 PM Re: Straightening a 36B Top.... [Re: 57-Chevy]
shavron Offline
Active Member

Registered: Thu Dec 22 2016
Loc: Tennessee
We'll see, I'll keep you posted.

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