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MG TD TF 1500 - Throttle Return Spring Bracket and Bolts

In a, current, earlier thread mention was made of the Throttle return spring and the bracket that bolts to the block with a starter retaining bolt.

I had seen this mentioned before and I did not remember having installed on in my long rebuild.
I went down to the garage and NO I did not have one.

I looked up the prices in AS and Moss and decided that for $29 I could fabricate the bracket, but winding a spring was too difficult. I decided to purchase that one.
I searched the archives and found some good dimensions for the bracket.
I am attaching my drawing that is based on those dimensions. I did deviate in that I used 1/16 flat stock rather than the 1/8 stock mentioned.

In checking where the bracket goes I found that 30 years ago or so I had incorrectly installed 3/8-16 bolts to hold the starter. These should have been Mad Metric (M M) 10mm X 1.5mm. The 16 tpi thread is very close to the 1.5 mm (16.6 tpi) and the 3/8 diameter being just a bit under the 10 mm diameter allows the bolts to fit and tighten. (The same is true of 5/16 fine and 8 X 1mm as I have also found out.)

So I needed some Mad Metric 10X1.5 bolts also. I could not find them in either AS' or Moss' catalog. Again in the archives FTFU was mentioned as the source. I ordered every thing from Doug and it arrived today.

In the next several posts I am showing drawings of the bracket. the spring and my construction process.

JA Benjamin


Attached is my drawing of the FTFU spring.



JA Benjamin


Here is a montage of my fabrication process. Left to right.
I printed out my sketch to size and glued it to a piece of flat stock. 3/4 wide by 3" long by 3/16 thick. It was what I had.
I center punched the dots and sawed out along the line. (I do have a metal cutting band saw, a hack saw would work as well.
I did grind to finished size on a 1" belt sander I have.

I drilled the holes ans noted on the drawing (first) and then bent the 45 degree leg in a vise.

(Second row)

First frame, see how close the 3/8-16 and the 10X1.5 mm are.


Second frame. I stamped the heads of the new bolts M M to avoid confusion when I go to fix things 5 years from now.

Third frame The bracket and spring are now Installed.

I hope this may be of some use to our members.

Jim B.

JA Benjamin

The bracket looks good Jim. The only difference between yours & mine is the angle. The side elevation in the drawing I had showed the bend in the bracket to be somewhat less than 45 degrees. Checked the four posts in the archive & it seems the 45 degree version comes from Moss & so may not be accurate. Haven't been able to locate the drawing I used yet but I guess the bend was about 30 degrees. This purportedly original drawing was supplied by Bruce from Sportsparts. As I've never seen an original bracket I'm unsure what the correct bend was. Anyone have an original that they could post a pic of or confirm the correct measurement of the angle? Cheers
Peter TD 5801
P Hehir

Looks like 45 degrees. (picture coming)
If this is not an original bracket then it was changed sometime prior to 1972.
B Mooney

Bracket

B Mooney

45 degrees looks about right. It's partially obscured in this picture I took as I was tearing my engine down, but you can see how it points directly toward the hole in the accelerator rod.
Joe

Joe Olson

Your pic Joe certainly presents strong evidence for the 45 degree bend. That alignment is pretty hard to argue with. Thanks guys. Cheers
Peter TD 5801
P Hehir

Here is an image of mine on file. Does not show the angle sorry.

Matthew.

M Magilton

Just had a look at the Car SOS episode on the TA & paused it on the original bracket from the guy in Melton Mobray. Definitely 45 degrees. Cheers
Peter TD 5801
P Hehir

Here you go, Steve. It was an early thread this year. Bud
Bud Krueger

In the first entry I said I used 1/16 material.
Typo should have been 3/16 thick material.

Jim B
JA Benjamin

This thread was discussed between 05/03/2016 and 26/08/2016

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