How to establish the neutral position for TC shock absorbers

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Osiris610
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How to establish the neutral position for TC shock absorbers

Post by Osiris610 » Sat Mar 12, 2022 5:31 am

I am reassembling my MGTC shocks, and I am unsure of how to replace the arms and links in the correct neutral position. I neglected to mark the positions of the arms on the shock bodies when I took them apart, and I don’t see pre-existing marks. Here is what I’ve done, after replacing all of the rubber bushings:
I attached the shock body to the chassis, which is sitting on its wheels without engine or body tub
With the end caps removed, I set the shock pistons to be as far in as they will go and at equal distances from the ends of the body.
I attached the shock link to the chassis bracket and positioned the arm to that it just reaches the upper end of the link, without moving the internal pistons (Photo 1).
The arm is angled down at about 35 degrees. (Photo 2). ? If it had the load of the engine, the arm would probably be about parallel with the shock body.

Is this the correct neutral position?
Attachments
ShockLink_7.JPG
ShockLink_4.JPG

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Duncan M
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Re: How to establish the neutral position for TC shock absorbers

Post by Duncan M » Sun Mar 13, 2022 9:33 am

You will find the arm will be parallel to the damper body at the mid way point of travel. Same position the arm will be when installed on the car and the car is sitting on the street.

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Steve Simmons
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Re: How to establish the neutral position for TC shock absorbers

Post by Steve Simmons » Sun Mar 13, 2022 7:04 pm

What Duncan said. :thumbs:

That dimple should be center of the piston movement. So just mount the arm at level position when the dimple is at the top, then double check by working the arm both ways to its limits.

Should look like this at the ends of travel...
Attachments
Mg TC Girling Shock Arm Travel
Mg TC Girling Shock Arm Travel
shock-travel.jpg (44.48 KiB) Viewed 1453 times
1949 TC8975 / XPAG 9609
1948 TC6011 / XPEG1182 (XPAG6472)
http://www.mgnuts.com

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Osiris610
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Re: How to establish the neutral position for TC shock absorbers

Post by Osiris610 » Mon Mar 14, 2022 5:26 am

Most helpful comments! Many thanks to everybody!

Michael Whalen

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frenchblatter
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Re: How to establish the neutral position for TC shock absorbers

Post by frenchblatter » Mon Mar 14, 2022 10:16 am

Michael, if it helps look at my rebuild blog http://www.lotus7news.co.uk/MG_TC_Shock_absorbers.htm
Lynne & Norman Verona.

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