Side to side movement in rack mount

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MarkHawkins
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Side to side movement in rack mount

Post by MarkHawkins » Sat Mar 31, 2018 8:01 pm

We are having problems with a steering rack sliding in it's new poly mounts. The U clamps are pulled down tight (metal to metal) but there is still movement. Are there any full pictures / diagrams of '69 coupe rack mountings - we have HBL ('68) as a reference but we are not sure if either HBL or CFK is standard.


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Side to side movement in rack mount

Post by gtcse8 » Sun Apr 01, 2018 11:09 am

I have the Factory manual on cd if that`s any help.
But all it does is show the exploded diagram and part numbers etc.

I can see the D rubber is split to aide fitting, so it may just be a steel shim you need under the polly to nip it up enough?.
Mark
Last edited by gtcse8 on Sun Apr 01, 2018 3:52 pm, edited 1 time in total.


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Side to side movement in rack mount

Post by Nick » Sun Apr 01, 2018 12:22 pm

Be careful with shims, anything between the rack and chassis will affect steering geometry.


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Side to side movement in rack mount

Post by Oaksey » Sun Apr 01, 2018 12:24 pm

Pretty sure there are L shaped plates that go between the poly and the chassis. I removed them when fitting solid mounts


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Side to side movement in rack mount

Post by gtcse8 » Sun Apr 01, 2018 3:52 pm

There are TWO components that go between the ORIGINAL rubber bush and the base.
Part # 40 Shim rack and pinion mounting
Part # 41 Locking plate rack and pinion mounting

So If they are missing or removed the polly would not compress enough to lock the rack ridged.
OR it could just be the polly moulding is either too soft to grip the rack OR its not an exact moulding


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Side to side movement in rack mount

Post by MarkHawkins » Mon Apr 02, 2018 12:53 pm

These do seem to be missing - I can see them on the other coupe. How closely related is the set up to a herald? Rimmers seem to sell all the bits for those.


Custodian of :

1968 '4b Coupe HBL 725G
1972 '5a M/overdrive ALJ 513K - ALJ 513K
1977 '6a M/overdrive - OPJ 62R

ex 1974 '5a auto - VLN 826M
ex 1985 GTC M/overdrive B205 AMT - number 413
ex 1984/85 SS1 number 0007 (1300)

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Side to side movement in rack mount

Post by gtcse8 » Mon Apr 02, 2018 1:07 pm

I don`t have access to a coupe anymore, nor have I ever looked at a Herald so can`t comment.

If they are cheap enough either buy a set and try them, OR take them off the other coupe and compare them.
Or just make copies of the other set.


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Side to side movement in rack mount

Post by Nick » Mon Apr 02, 2018 1:20 pm

Shims should be OK, but need to be correct thickness or your will get bump steer. Tr not Herald based I think.

I would guess shims at about 4 mm in total.Not easy to measure in situ.


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Side to side movement in rack mount

Post by philhoward » Mon Apr 02, 2018 1:34 pm

Nick wrote:
Mon Apr 02, 2018 1:20 pm
Shims should be OK, but need to be correct thickness or your will get bump steer. Tr not Herald based I think.

I would guess shims at about 4 mm in total.Not easy to measure in situ.
I always though the Coupe rack was basically Herald?


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Side to side movement in rack mount

Post by Oaksey » Mon Apr 02, 2018 1:38 pm

It is.


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Side to side movement in rack mount

Post by *JP* » Mon Apr 02, 2018 3:19 pm

Oaksey wrote:
Mon Apr 02, 2018 1:38 pm
It is.
Better to say it's from an Elan :) ...sounds posher!



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Side to side movement in rack mount

Post by MarkHawkins » Mon Apr 02, 2018 9:30 pm

Herald sourced steering sounds cheaper and associated with a tight turning circle - positive things from my point of view.


Custodian of :

1968 '4b Coupe HBL 725G
1972 '5a M/overdrive ALJ 513K - ALJ 513K
1977 '6a M/overdrive - OPJ 62R

ex 1974 '5a auto - VLN 826M
ex 1985 GTC M/overdrive B205 AMT - number 413
ex 1984/85 SS1 number 0007 (1300)

*JP*
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Side to side movement in rack mount

Post by *JP* » Wed Apr 04, 2018 6:35 pm

MarkHawkins wrote:
Mon Apr 02, 2018 9:30 pm
Herald sourced steering sounds cheaper and associated with a tight turning circle - positive things from my point of view.
Agreed, it should logically be cheaper to go to the Triumph source.
On the Elan the steering lock had to be restricted compared to the same set up on the Herald.I would be very surprised if the lock on the Coupe was not similarly restricted,because the maximum lock on a Herald was really extreme.

For the record,this is what the leading Lotus parts supplier lists:
https://paulmattysportscars.co.uk/produ ... ing-racks/



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