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Tandem Towbar

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Ford GP View Drop Down
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    Posted: 06 May 2016 at 5:15pm
I have seen Harveys Towbars.  They are pretty much indistinguishable from an original, except for the fact they are so clean and shiney. I imagine if he buried it for a few months, that could be fixed too LOL.
Anyway, you may want to touch base with him before you start your project.  I am sure he can help with advice and parts.
Brian
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Post Options Post Options   Thanks (1) Thanks(1)   Quote harvey Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2016 at 2:01am
I sell reproduction Tandem Tow bar made to the military specifications along with all the proper mounting hardware and the wooden block.
you can Email me for pictures and price.
Harvey
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Post Options Post Options   Thanks (0) Thanks(0)   Quote harvey Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb. 2010 at 6:07am
Howdy,
 
Well I've been building the tandem tow bars for quite some time now and have sold
 
them at various military jeep meets such as the Towers meet up in Lodi, California.
 
I'm in the process of putting together a kit that you can assemble. It will contain all
 
the parts necessary to build it along with instructions. Additionaly, I have had the
 
wooden block manufactured that mounts to the grill and holds the tow bar in place
 
when not in use. Also a repoduction of the data plate that mounts on the dash.
 
My tentave date for completion for  kit availability will be some time in late April.
 
These are built from the orignal miltary specifications. 
 
Thanks
 
The Little Buckaroo
 
 
 
 
 
The Little Buckaroo
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 14 Dec. 2009 at 6:59pm

This is the latest and greatest.  The lunnette eye is still controversial.  Since the average hole diameter seems to be 2-1/2", that is what I am going with.  I'll let this drawing sit for a couple days and if I don't get anymore feedback, I'll start drawing up the individual part drawings.  It will be a while before I can start to make one since I have other jeep projects going on.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RA472A Quote  Post ReplyReply Direct Link To This Post Posted: 14 Dec. 2009 at 3:30am
Shank is 1.25"

f 1.68"
d 3.50"
e .75"
g 1.25"


Edited by RA472A - 14 Dec. 2009 at 4:10am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 14 Dec. 2009 at 2:59am
Thanks
What is the OD of the shank on the lunette eye?  
 
And .... do you have any measurements on this piece?
 
Thanks
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RA472A Quote  Post ReplyReply Direct Link To This Post Posted: 14 Dec. 2009 at 2:44am
Jeff,
  I checked lunnette eye measurements on a different NOS towbar and it is also 2.50" I.D. and 4.50" O.D.  I'm still looking for my old Army Motors article with mounting instructions.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote russnj Quote  Post ReplyReply Direct Link To This Post Posted: 13 Dec. 2009 at 1:46pm
Jeff, I will double check my measurements on the eyebolt. But remember that is the part that will get most wear, so a well use one will have a bigger hole and ring will be thinner.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote RA472A Quote  Post ReplyReply Direct Link To This Post Posted: 12 Dec. 2009 at 5:15pm
Dimension C is 4 3/4-4 13/16"  There is so much weld "splatter" in this area, it's hard to get it right on.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 12 Dec. 2009 at 4:34pm
Originally posted by RA472A RA472A wrote:

....There is a good article in an Army Motors on mounting the towbar and additional plates needed if mounting to an existing bumper like is on my M38.  If you want, I can send it to you. 
I'm interested in any data I can get.  Thanks.
 
What do you have for dimension "C" on the eyebolt?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RA472A Quote  Post ReplyReply Direct Link To This Post Posted: 12 Dec. 2009 at 4:29pm
On mine,  the lunnette eye inner hole dia. is 2 1/2" and outer dia. is 4 1/2".  There is a good article in an Army Motors on mounting the towbar and additional plates needed if mounting to an existing bumper like is on my M38.  If you want, I can send it to you. 
  I'm sure the rivets are 3/8


Edited by RA472A - 12 Dec. 2009 at 4:52pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 12 Dec. 2009 at 3:56pm
I'm getting a little closer:
 
These dimensions are a composite of three tow bars, russnj, 11aces, jeepfreek.  None of the three are exactly the same so I choose dimensions where 3 of 3 match, 2 of 3 match, or a nominal dimension that made sense.
 
These dimensions are still up for debate  though if anyone wants to join in.
 
I have pretty big discrepancies on the size of the eye bolt:
On Russ's the "A" dimension is 2-1/16" and on Jim's it is 2-3/4".
 
I wouldn't mind getting some more feedback on these dimensions
 
Also, I need some dimensions on this inner gusset that the eyebolt welds to:
 
Are all the rivets the same size?  If so, what size
 
Finally, I could use some dimensions on these rivet locations:
 
Thanks again. At your leisure please.


Edited by jpet - 12 Dec. 2009 at 4:05pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 11acs Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec. 2009 at 7:47pm
The tapers on the ends of the bumper tube are welded at about 6" in. from end. The holes in the end of the tube are 1" tapering in to about 7/8"
The angle piece that joins two assemblies the tube rotates in is 1 1/2" x 1/4" x 32 3/4" Mine looks like it had a chain wrapped around it & bending it up by Bubba. Should be not too hard to replace.
You are correct that the "stop" flanges are 1/4" x 1/8" , I was wrong.


Victor



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Post Options Post Options   Thanks (0) Thanks(0)   Quote 11acs Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec. 2009 at 5:38pm
I'll take another look in a few minutes & take photos and try to answer the above questions. I might be off on the flange measurement. Mine is an original, but has an a-frame tongue coupler tacked on in place of the ring which was sawed off flush with the end of the assembly.  
Victor



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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec. 2009 at 5:12pm
Originally posted by 11acs 11acs wrote:

I have 2" from the start of the taper to the end on the main tube. .....
Yep we are good there.
Quote .... The flange that bolts to the frame bracket is 2". ....
??? Not sure what you mean.  maybe a pic would be good
Quote .... The main beam is 21/4" across horizontally and 23/4" vertical measurement. ...
Are you talking about the "A" frame where I have 20.5 and 19.5 respectively? Never mind, I know what you mean now. 
Quote ...There is a 1/2" high flange welded to the tube on each side of your 20.50 measurement. ...
  I have flanges there too but they are 1/4" high by 1/8" wide.  Got any pics?
Quote .... My overall length of the tube is 46" ....
  Are the tapers on the ends of your bumper tube welded on or is the pipe swedged on the ends?
Quote ...There is a piece of formed angle that joins the two flanges that bolt to the frame brackets that you don't have on your drawing.
  Again I'm not sure what you mean.  Yes, I know there is a bracket there.  I don't have dimensions for that but I need them.
 
Victor.  Thanks for the info.  At your convenience (and when it warms up a little) some pictures would be nice.  Preferably the pictures would be straight on to avoid as much parallax as possible and with a tape measure or scale in the pic for scaling.
 
The dimensions I have posted are from Russ's which is original.  Is your's an original?
 
Thanks again and do this at your leisure.
 
jpet


Edited by jpet - 11 Dec. 2009 at 5:16pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 11acs Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec. 2009 at 4:44pm
I have 2" from the start of the taper to the end on the main tube. The flange that bolts to the frame bracket is 2".
The main beam is 21/4" across horizontally and 23/4" vertical measurement. 
There is a 1/2" high flange welded to the tube on each side of your 20.50 measurement.
My overall length of the tube is 46"
The plate measurement you have at 3" is 31/2" on mine.
It's warmed up to 14 degrees, but my fingers couldn't take any more. Wink
I can bring out the calipers in a little while & get the thickness measurements.
I can take some closeup photos if you want.
There is a piece of formed angle that joins the two flanges that bolt to the frame brackets that you don't have on your drawing.

Victor



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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec. 2009 at 4:16pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec. 2009 at 3:35pm
Some of these dimensions are not right but it is a start.  What is the overall length of the bumper pipe?
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