front suspension assembly

Post any Tech Tips or any matters and questions relating to upkeep
metcoptiger
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Joined: Wed Nov 19, 2008 10:17 pm

Post by metcoptiger » Mon Dec 19, 2011 6:25 pm

Thanks everyone for the advice on the front suspension assembly. I'm not much of an engineer so I would be very gratefull if anyone out there has a Chucrhill Spring compressor I can borrow/hire when the time comes.

Seems I have started something on the subject of techtips on the website ! :D

martin172
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Post by martin172 » Mon Dec 19, 2011 11:24 pm

You need to let people know where you live to raise the odds of a tool loan fella.

Yes, the tech tips issue is all your fault. :lol:

While on the subject, who has a full set of CWs to loan for the scanning bit. I'll do it if need be but I need the Cws first.

metcoptiger
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Post by metcoptiger » Tue Dec 20, 2011 12:08 am

I suppose as in a rounabout way I started this I could scan in the tech tips as I have virtually all the CW's providing it is going to progress from there.
I am in Hertfordshire so if anyone has a tool to loan I can collect in the SE or pay return shipping from anywhere in Europe.

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gvickery
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Post by gvickery » Tue Dec 20, 2011 12:03 pm

Martin

I can fix that and thanks a lot for volunteering!! The Club is mulling over turning the project into a 'Tiger TECHKNOW' DVD/Book. Will be in touch soonish.

Graham
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Mal
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Post by Mal » Fri Dec 30, 2011 2:46 am

V8 burble wrote
NB Do remember to put the lower fulcrum pins in the correct way round! Identify the "larger" ends, mark them and make sure that they are fitted to the rear.
I had the bushes and fulcrum pins fitted to the A arms a while back at a workshop. It was a while before the new heavy duty replacement fulcrum pins arrived and I got them all painted up. Trying to measure them fitted is a bit harder to see, but I think one is correct and the other not :( . I am only measuring about a 1.5mm difference from the larger end to the smaller. On the old pins the difference is a bit over 5mm from end to end.

I suppose there is no way to remove a bush without destroying it, to flip the pin around :?:
Image

martin172
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Post by martin172 » Fri Dec 30, 2011 11:47 am

Hi Mal,
The measurement of the centres of the slots is 175mm and the bigger end dimension is 28.6mm.
If they are poly bushes they will have probably settled in by now so it will be incredibly difficult to remove them.

Hope this helps mate.

Mal
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Post by Mal » Fri Dec 30, 2011 11:25 pm

Here is the long and the short of it, or the the not so long and short of it.
Image

The bottom pin is the new and the top the original. There is a long and a short end to the new pin but not as great as the original. I don't know if this will matter as long as both pins are replaced and both fitted the correct way.

I managed to get one bush out ok but it had the slightly larger washer which would not fit through the bush eye. I had to take the other bush out which did not want to come out without destroying it.
Image

martin172
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Post by martin172 » Fri Dec 30, 2011 11:48 pm

The overall length of the pins to the shoulders where the diameter decreases is 217mm on my 2 new pins and my 2 old pins so if your new one doesn't measure to this and/or the dimension between the slots I would reject it.
Where did you get it from?

Mal
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Post by Mal » Sat Dec 31, 2011 8:35 pm

Martin, The pins both measure 217mm there. Pins were from sunbeam supreme.
Image

martin172
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Post by martin172 » Sat Dec 31, 2011 9:29 pm

Is the dimension across the centres of the bolt locating slots 175mm?

tigerguy2
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Post by tigerguy2 » Sat Dec 31, 2011 9:49 pm

Don't know if this is helpful, but there is a relevant dimension shown in the workshop manual.
As already noted in earlier posts the slots are not the same distance from the shoulders/ends of the thicker diameter. Have a look at Figure 16, Section F, page 22 in the manual. It gives a dimension of 1 1/8 inch (2.86 cm) as the distance from that edge of the pin to the center of the slot on the end of the pin that goes to the back side of the A Arm. Might want to be sure that dimension on the replacement pin is correct as well.

Gene

Mal
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Post by Mal » Sun Jan 01, 2012 12:10 am

Is the dimension across the centres of the bolt locating slots 175mm?
Martin, 165mm C/L which is the same as the original. 175 from the outside edge of the grooves.

Gene, this is where there is a difference. Long end on the replacements are 26.8mm, short 25.3 against the 28.6 and 23.2 on the original.
Image

martin172
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Post by martin172 » Sun Jan 01, 2012 12:31 am

Yes, you're right Mal, 165mm at the centres. :oops: It's been a tough day.

Doing the sums on your measurements means that the new one is wrong.

I personally would reject it but I'm a fussy pedantic sod when it comes to things like this.

Edited because some of what I wrote was incorrect.
Last edited by martin172 on Sun Jan 01, 2012 11:11 am, edited 2 times in total.

tigerguy2
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Post by tigerguy2 » Sun Jan 01, 2012 12:45 am

Sounds like the new ones was machined wrong. Based on the discrepancy, I would reject the new ones. To use them would cause the A-Arms to be located wrong horizontally with respect to the cross member per what the factory intended.

Gene

martin172
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Post by martin172 » Sun Jan 01, 2012 12:48 am

...and potentially throw out the camber too.

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