MM Quarterlight Repair

for those with Series MM sidevalve cars produced between September 1948 and February 1953

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RobThomas
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Re: MM Quarterlight Repair

Postby RobThomas » Sat Mar 03, 2018 3:54 pm

I was thinking that laser cutting a flat sheet of Xmm steel to the right profile, with a cut width the same as the new frame thickness, would give a neat sandwich to allow a piece of narrow steel to be clamped between the 2 pieces and then bludgeoned over with a delicate BFH.

Are you sure it is made from 3mm steel? Sounds a little thick.
Cardiff, UK

spike_esq
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Re: MM Quarterlight Repair

Postby spike_esq » Sun Mar 04, 2018 12:00 am

Hi Rob,

Thanks for the reply. Well, well you were right to query my thickness measurement because the actual measurement is 1.5mm. :D I had to brush up my micrometer reading skills. Definitely 1.5mm. No possibility of getting the "U" section for profiling job. Although flat plate might be better to ensure the profile is then spot on. Let me know the progress. Cheers.
Regards,
Harry.

spike_esq
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Re: MM Quarterlight Repair

Postby spike_esq » Sun Mar 04, 2018 9:40 am

Hi Rob,

Thinking as one does. Perhaps a better alternative solution would be to take a very good condition quarter light frame (of same profile) from a later model and transfer over to it both swivel pins and the half moon catch. This would involve some detailed drilling of the donor frame, welding up of unwanted holes/ openings and then spot welding of the transferred components. This method might be less challenging and time consuming than the one mentioned previously.

Possible alternative method? Do you see any drawbacks?
Regards,
Harry.

RobThomas
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Re: MM Quarterlight Repair

Postby RobThomas » Sun Mar 04, 2018 10:16 am

Finding a decent one would be the biggest issue. :D

I can make the Lowlight pivot pins etc but if the frame piece is corroded then it takes more effort to repair than to make a new one. I looked into to doing this to a stainless assembly but decided that for me it wasn't worth the effort.
Cardiff, UK

spike_esq
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Re: MM Quarterlight Repair

Postby spike_esq » Mon Jun 25, 2018 9:55 am

Hi Rob, Greetings and getting back to the topic of MM quarter lights. I still require a replacement passenger side quarter light for my 1949 Lowlight and welcome any new leads. Plus there are a few ongoing issues previously touched on as outlined below.

After discussion with the specialist chrome platers the half moon catches are cast and need to chrome plated separated from the steel frames. This means removing the catches, probably making new pins and then the task of attaching the pin to the frame. Would you know of anyone who might have the detailed drawings for the fixing pin (these will need to be manufactured) and then someone who might have the experience to replace the half moon catch and pin onto the newly chromed frames?

Have you had any further inspirations about the source of the MM quarter light rubbers as we previously discussed. There's some interest in these and wondered if a batch manufacturing approach might be the way forward?

Truly welcome any feedback Rob or from any readers with an interest in this matter. Many, many thanks.

Regards,
spike (harry)

plumby74
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Re: MM Quarterlight Repair

Postby plumby74 » Mon Jun 25, 2018 11:59 am

Do the pivot-pins at least (holding the swivel-catches) differ from the standard M1000 ones?

I have a few of the pins, and I thought they are available still, and in a chromed condition....... Re-working an existing steel q'light frame sounds to me the most feasible way to go.


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