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Author Topic: Tracking  (Read 160 times)
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mikeC
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« on: 07 June, 2018, 10:45:45 AM »

The more I drive my car, the more I am convinced there is something amiss with the steering: in the straight-ahead position, the steering is quite heavy, and the further it is turned the lighter it becomes, to the point where nearing full lock it almost wants to take over. I could convince myself that there is some feathering on the tyre tread, although that is only marginal; I also get tyre squeal when I wouldn't expect it.

My conclusion is that the tracking is out, but on investigation there appears to be no means of adjustment:



Am I missing something?
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1953 Lancia Appia Series 1
1931 Austin Seven deluxe saloon
1914 Saxon Model A roadster
1967 Singer Chamois

(previously owned Lancias: 1958 Appia Pininfarina coupe, 1987 Delta LX, 1986 Delta cabriolet, 1991 Dedra 1.8, 1993 Dedra 1.6)
simonandjuliet
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« Reply #1 on: 07 June, 2018, 11:16:24 AM »

You can alter the tracking with the excentric bolt (10 on the TAV) - I set mine up straight, neither toe-in nor out and am happy with how they run.
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S1 Aprilia Cabrio, S2 Aprilia, S1 Appia Promiscuo, S2 Appia furgoncino, S3 Appia, R4 Sinpar, R4 Rodeo, Velosolex, R60 Tractor, Moto Guzzi Ercole, Disco 3, Mini ALL4 JCW, Moto Guzzi Cardellino 73,Honda XLV750R,Fulvia 1600 HF,1 & 1/2 Rallye S's
GG
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B20 s.2, Appia C10 unrestored


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« Reply #2 on: 07 June, 2018, 01:02:23 PM »

Odd. Should be quite light straight ahead, very little loading in turning. Perhaps go get the car checked and see what all the angles are as is, and then see where to adjust. Toe-in seems like a good candidate to start with.
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B20 s.2, Appia C10 unrestored
mikeC
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« Reply #3 on: 07 June, 2018, 01:15:09 PM »

... I set mine up straight, neither toe-in nor out and am happy with how they run.

That's interesting; the Handbook quotes '02mm measured on the wheel rim', whatever that means. I interpreted it as toe-in of 2mm; maybe that should be 'up to 2mm'? I'll try it with zero toe-in and see what that's like.
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1953 Lancia Appia Series 1
1931 Austin Seven deluxe saloon
1914 Saxon Model A roadster
1967 Singer Chamois

(previously owned Lancias: 1958 Appia Pininfarina coupe, 1987 Delta LX, 1986 Delta cabriolet, 1991 Dedra 1.8, 1993 Dedra 1.6)
simonandjuliet
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« Reply #4 on: 07 June, 2018, 02:01:06 PM »

ps - is your steering box correctly adjusted ?? If they are too tight they are not nice .....
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S1 Aprilia Cabrio, S2 Aprilia, S1 Appia Promiscuo, S2 Appia furgoncino, S3 Appia, R4 Sinpar, R4 Rodeo, Velosolex, R60 Tractor, Moto Guzzi Ercole, Disco 3, Mini ALL4 JCW, Moto Guzzi Cardellino 73,Honda XLV750R,Fulvia 1600 HF,1 & 1/2 Rallye S's
mikeC
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« Reply #5 on: 07 June, 2018, 02:24:13 PM »

I've just done a quick check with a couple of planks of wood, and it looks like I've got significant toe-out. I shall try to devise a more accurate measuring system at the weekend and report back ...
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1953 Lancia Appia Series 1
1931 Austin Seven deluxe saloon
1914 Saxon Model A roadster
1967 Singer Chamois

(previously owned Lancias: 1958 Appia Pininfarina coupe, 1987 Delta LX, 1986 Delta cabriolet, 1991 Dedra 1.8, 1993 Dedra 1.6)
DavidLaver
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« Reply #6 on: 07 June, 2018, 02:48:00 PM »


Not sure if this test works with sliding pillars on full droop - but with it jacked up can you push and pull on the tyre and spin the steering wheel?

Am trying to think how else to isolate the steering box...more to inspire a more sensible suggestion than thinking this is "the way":  pump the tyres up really hard and rest the contact patches on "milk bottle plastic".  (I've found it to be good material for low friction washers).

Anyone got a sensible suggestion? 

Last thought - adjust so there's a wee bit of free play at straight ahead on the assumption that someone's over done it?

Again - "brain storming" to inspire suggestions from others...
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David Laver, Lewisham.
chriswgawne
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« Reply #7 on: 09 June, 2018, 06:52:28 AM »

If the Appia steering box is the same general design as that of the Aurelia then there are two things you can do to improve steering feel and precision.
The first is to disconnect the steering box from the steering arms and then rotate the steering wheel by one complete turn or maybe two then re-assemble. This moves the most worn area internally away from straight ahead. And then after having done that, if there is still play  there is an internal eccentric adjustment one can do from underneath the steering box but be careful not to let the needle rollers fall out by using an O ring or rubber band to hold them up.. If this happens you will most likely have to remove the box from the car and re-assemble on the bench.
Chris
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Chris Gawne
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