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Straightening a 36B Top.... #693980
Thu Sep 07 2017 06:50 PM
Thu Sep 07 2017 06:50 PM
Joined: Oct 2000
Posts: 1,339
Locust, NC
57-Chevy Offline OP
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57-Chevy  Offline OP
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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:




IMG_0845.JPGIMG_0847.JPGIMG_0848.JPGIMG_0846.JPG
During:

Last edited by 57-Chevy; Thu Sep 07 2017 07:23 PM.

KJV Psalms 16:11

Thou wilt shew me the path of life:
in thy presence is fulness of joy;
at thy right hand there are pleasures for evermore.
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Re: Straightening a 36B Top.... [Re: 57-Chevy] #693981
Thu Sep 07 2017 06:52 PM
Thu Sep 07 2017 06:52 PM
Joined: Oct 2000
Posts: 1,339
Locust, NC
57-Chevy Offline OP
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57-Chevy  Offline OP
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Posts: 1,339
Locust, NC
During:

IMG_0849.JPGIMG_0850.JPGIMG_0851.JPG
After:

IMG_0852.JPG

KJV Psalms 16:11

Thou wilt shew me the path of life:
in thy presence is fulness of joy;
at thy right hand there are pleasures for evermore.
Re: Straightening a 36B Top.... [Re: 57-Chevy] #693983
Thu Sep 07 2017 07:00 PM
Thu Sep 07 2017 07:00 PM
Joined: Aug 2004
Posts: 1,300
Oregon
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petropumps Online content
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Oregon
That's amazing. Had no idea you could do that with pot metal.

Re: Straightening a 36B Top.... [Re: 57-Chevy] #693986
Thu Sep 07 2017 07:38 PM
Thu Sep 07 2017 07:38 PM
Joined: Jan 2009
Posts: 5,153
Portland Oregon
C
Craig Osbeck Offline
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Good job


Craig
Re: Straightening a 36B Top.... [Re: 57-Chevy] #693988
Thu Sep 07 2017 07:54 PM
Thu Sep 07 2017 07:54 PM
Joined: Feb 2014
Posts: 1,198
Michigan, USA (near Chesterfie...
Speedracer Offline
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Speedracer  Offline
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Michigan, USA (near Chesterfie...
Very, very nice job. Good save.


WTB signs: WHITE STAR, FILMOIL, FLYING A button and Economical Transportation Chevrolet Sign. Also looking for a Wayne 866. Send a PM. Thanks.
Re: Straightening a 36B Top.... [Re: 57-Chevy] #694005
Fri Sep 08 2017 04:34 AM
Fri Sep 08 2017 04:34 AM
Joined: Dec 2012
Posts: 149
Wisconsin (South Central)
R
RandyM Online content
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RandyM  Online Content
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Posts: 149
Wisconsin (South Central)
NOW! That is a great post. Thank you for sharing.


Randy
Re: Straightening a 36B Top.... [Re: 57-Chevy] #694011
Fri Sep 08 2017 06:15 AM
Fri Sep 08 2017 06:15 AM
Joined: Dec 2016
Posts: 30
Tennessee
S
shavron Offline
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shavron  Offline
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Posts: 30
Tennessee
Thank you for posting that. I'm a newbie

IMG_20170908_3463.jpg
Re: Straightening a 36B Top.... [Re: 57-Chevy] #694013
Fri Sep 08 2017 06:37 AM
Fri Sep 08 2017 06:37 AM
Joined: Oct 2000
Posts: 1,339
Locust, NC
57-Chevy Offline OP
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57-Chevy  Offline OP
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Locust, NC
Ron, that one can be straightened! Just remember patience!


KJV Psalms 16:11

Thou wilt shew me the path of life:
in thy presence is fulness of joy;
at thy right hand there are pleasures for evermore.
Re: Straightening a 36B Top.... [Re: 57-Chevy] #694079
Fri Sep 08 2017 08:15 PM
Fri Sep 08 2017 08:15 PM
Joined: Jun 2006
Posts: 696
tulare, ca
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tulareone Offline
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tulare, ca
Can I just send you mine -- what you charge-- ruben


looking for spanish gas signs
Re: Straightening a 36B Top.... [Re: 57-Chevy] #694107
Sat Sep 09 2017 04:10 PM
Sat Sep 09 2017 04:10 PM
Joined: May 2016
Posts: 317
Midland, Michigan
BrianH Offline
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BrianH  Offline
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Posts: 317
Midland, Michigan
That is nice work. Good job on straightening out the original part without cracking it!

BrianH

Re: Straightening a 36B Top.... [Re: 57-Chevy] #694160
Sun Sep 10 2017 12:56 PM
Sun Sep 10 2017 12:56 PM
Joined: Dec 2016
Posts: 30
Tennessee
S
shavron Offline
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shavron  Offline
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Posts: 30
Tennessee
I haven't got mine apart, but it should fit into an oven and set it to 300 deg.

Re: Straightening a 36B Top.... [Re: 57-Chevy] #694168
Sun Sep 10 2017 01:46 PM
Sun Sep 10 2017 01:46 PM
Joined: May 2012
Posts: 1,296
Michigan, Union Pier
Done4 Online content
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Done4  Online Content
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Michigan, Union Pier
Did you get flight control approval on the oven thing? The


Have gas all the time
Re: Straightening a 36B Top.... [Re: 57-Chevy] #694177
Sun Sep 10 2017 03:53 PM
Sun Sep 10 2017 03:53 PM
Joined: Dec 2016
Posts: 30
Tennessee
S
shavron Offline
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shavron  Offline
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Joined: Dec 2016
Posts: 30
Tennessee
We'll see, I'll keep you posted.

Re: Straightening a 36B Top.... [Re: 57-Chevy] #697089
Fri Oct 20 2017 11:46 AM
Fri Oct 20 2017 11:46 AM
Joined: Jan 2009
Posts: 5,153
Portland Oregon
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Craig Osbeck Offline
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Craig Osbeck  Offline
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Joined: Jan 2009
Posts: 5,153
Portland Oregon
Could this work also on a Bennett top ? What kind of heater did you use ?


Craig
Re: Straightening a 36B Top.... [Re: 57-Chevy] #697104
Fri Oct 20 2017 06:51 PM
Fri Oct 20 2017 06:51 PM
Joined: Oct 2000
Posts: 1,339
Locust, NC
57-Chevy Offline OP
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57-Chevy  Offline OP
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Posts: 1,339
Locust, NC
Possibly? I placed the 36b top right in front of my shop reddy heater. You can put it in an oven too. I got it pretty hot, so hot it would almost burn me with leather work gloves on.


KJV Psalms 16:11

Thou wilt shew me the path of life:
in thy presence is fulness of joy;
at thy right hand there are pleasures for evermore.
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