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Alain Pineau
France
13 Posts |
 Posted - 31/05/2012 : 12:53:18
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Dear Jerry, dear All,
Please, forgive my naively in advance (but as my grandmother used to say: it is better to seem ignorant rather than stupid) as I have very little experience with those prewar wheels .. .
Is it possible / easy to remove alone tires off Rudge rims or is it essential to ask to a specialist?
My rims are superb and I am afraid of damaging them.
Any specific tools required except tire lever ?
Thanks !
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Simon Johnston
United Kingdom
6186 Posts |
Posted - 31/05/2012 : 14:12:08
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Alain,
According to the Instruction Manual no tools are required for removal and refitting of 4.00 x 19 tyres and in fact the use of tyre levers is specifically discouraged (which probably explains why none were provided in the MMM tool kits). Attached are the relevant pages from the manual for your delight and edification.
P.S. The images have appeared smaller than I expected but if you download them ((right click, save image as...)you should be able to read them OK.
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Edited by - Simon Johnston on 31/05/2012 14:14:57 |
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Alain Pineau
France
13 Posts |
Posted - 31/05/2012 : 16:02:26
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Wonderful ! Thanks a lot Simon !
I have already print these 2 pages and It seems to be be easier than on my old Motobécane ( but must be quiet tough anyway :)
I really need to find an instruction manual !
By the way, there is on the first page you sent ( page 69 ) the "official" answer to my first question :
" Dunlop 4.00 for 19 "" tires are fitted to the M.G Midget, and the makers recommend pressures as follows :
Front Wheels, 27 lbs. per square inch
Rear wheels, 27 lbs. per square inch...// when rear seats are occupied pressure should be increased in the rear tyres to about 30 lbs."
Last question( but not least ) what is the conversion from lbs. to psi ?
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george
United Kingdom
863 Posts |
Posted - 31/05/2012 : 16:19:33
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| Alain ,PSI is pounds per square inch ,if quoted just as a pounds figure it is taken as per square inch..As a matter of interest I have 3 classic cars total of 12 tyres in use with the exeption of 2 new they are all between 15 and 20 years old ,having said that I dont drive the cars very hard.cheers Geoff |
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Simon Johnston
United Kingdom
6186 Posts |
Posted - 31/05/2012 : 16:35:07
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quote:
Originally posted by Alain Pineau
By the way, there is on the first page you sent ( page 69 ) the "official" answer to my first question :
" Dunlop 4.00 for 19 "" tires are fitted to the M.G Midget, and the makers recommend pressures as follows :
Front Wheels, 27 lbs. per square inch
Rear wheels, 27 lbs. per square inch...// when rear seats are occupied pressure should be increased in the rear tyres to about 30 lbs."
Now that is very interesting. I have two versions of the J manual (neither original I hasten to add - just copies). I used the August 1933 version when I quoted tyre pressures as being 32 psi all round in answer to your original quetion and thought that this might be for the swept wing car and thus perhaps appropriate for the P type. But the pages I subsequently copied for posting and which quoted 27 psi (and which I hadn't noticed before) were from an earlier one dated April 1933 which would be for the lighter cycle wing car. And now the reference to increasing to 30 lbs makes sense - but only in relation to starting out at 27! And as George says, just interpret lbs in this case as lbs per square inch (psi) |
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Alain Pineau
France
13 Posts |
Posted - 31/05/2012 : 18:31:49
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Thank you guys for all those precious advices, very impressive to have such experimented feed back, I really appreciate !
I will check my wheels, trying to look in each of them, and then; if everything OK inflate to 30 lbs.
On next saturday, there is a nice meeting at Montlhéry ( "Autodrome héritage" ) where I will enjoy to drive my PA on the track.
Even smoothly, it always enough to be faster than Amilcar :)
It might be, as usually, the only MMM on the autodrome as they are not so common in France, but i will do my best to represent with dignity the family and I will have a friendly thought for you.
That would be very exciting if some of you would come also...
Merci et à bientôt ! |
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ags
United Kingdom
275 Posts |
Posted - 01/06/2012 : 01:30:22
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Hi Alain,
The equivalent page (to the J2 example quoted earlier) in the PA/PB instruction manual is page 14 in my copy, which is a Sixth Edition one from August 1946. This says that the pressures recommended by Dunlop, who made the original tyres, were 28 lb. per square inch for 4.00-19 tyres at front and rear. You may find that you prefer tyre pressures a little higher than this but the final choice depends on your driving style and preferences.
I personally find it very difficult to change tyres without using levers, particularly if the tyres have been on the rims for some years. You can lessen damage to the paint work on the rims by using masking tape on the rims, or just touch up any scrapes that do occur.
In this country you would be very lucky to find any "specialist" with any better equipment than a set of tyre levers as all tyre changing machines that I have seen recently are unable to cope with our big diameter, narrow rimmed, centre lock wheels. And dynamic balancing, I think that that is just a dream over here.
Allez vous bien!,
More technical ramblings from
Andrew Smith MMM571
PB Abergavenny |
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PA in OZ
Australia
29 Posts |
Posted - 01/06/2012 : 08:24:44
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I've recently been through the tyre changing saga, had 5 to refit after painting and the mainstream tyre retailers /fitters aren't the least bit interested. I went to a motorcycle shop and they happily completed the task without any fuss. They are very familiar with 19" laced rims. Balancing is the next task and I'm looking at DynaBeads as an alternative. http://www.dynabeads.co.uk Dynamic is unavailable in my village and static was not successful when the weights fell off so am contemplating this alternative. Anyone had any experience with this system??
Regards
Tony. |
Edited by - PA in OZ on 01/06/2012 08:26:40 |
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LewPalmer
USA
3251 Posts |
Posted - 01/06/2012 : 13:36:52
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I use dynabeads on the TD. I haven't tried them on a wiree wheeled car. On the TD they work very well, but they are a real challenge to get them into the valve stem.
Lew Palmer
Registrar, NAMMMR |
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David Allison
United Kingdom
665 Posts |
Posted - 01/06/2012 : 13:55:24
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Most good tyre bays will balance your wheels for you.
However they do have problems with the later type balancing machines which dont allow the operator to close the safety guard.
Try a tyre bay that does work on Land Rover and other 4x4 vehicles - then they will have a suitable balancing machine.
There are plenty of tyre bays around - keep trying till you find a guy you can trust.
My local guy in Thatcham is very good indeed - he balanced all 4 wheels for the NA over 5 years ago now and the weights have not only stayed on but there have been no wheel wobble problems or steering wheel tremors since.
For rolled edge wheel rims I would recommend using the self adhesive wheel weights stuck onto the rim behind the spoke line - make sure the wheels are clean.
Also make sure that the wheels are good and straight (Yes I know they are supposed to be round) - but check that the rims arn't buckled - as this can adversely influence the wheel balance.
Regards David
Regards David |
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Alain Pineau
France
13 Posts |
Posted - 01/06/2012 : 14:13:15
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Hi PA in OZ,
Asking to a motorbike garage is a good idea, there are several not far from my home, I will ask if they could care about, and it could be a good "back up solution" if I get lost.
On the other hand, it's my own challenge to do a maximum of maintenance on my PA by myself.
Great pride and satisfaction when I succeed ( but I must confess that I didn't had to face big things still now :) |
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Oz34
United Kingdom
2573 Posts |
Posted - 06/06/2012 : 17:40:48
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Just to put the cat among...& seeing Simon J's comments on swept wing J & by inference P Types, I've just rooted out my P manual; "First Edition April 1934".
General Data, page 4; Tyre pressures 2 & 4 seater 32 lbs. No mention of front or rear.
Page 14;"Dunlop tyre are fitted, & the makers recommended pressures are as follows:- Tyre size 4.00-19 Front & rear 32 psi.
These pressures, if desired, may be reduced by 4 psi if the car is to be driven at low average speeds, also in the case of the 4 seater when the front seats only are occupied".
No suggestion of puting more air in the back of the 4 seater with 4 up as you might expect, just 28 all round for 2 & 32 all round for 4. It also seems to me to imply you can thrash the 4 seater within an inch of its life on 28 psi all round as long as there are only 2 of you!
Dave |
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