Ser11 semiphore switch.

Discuss Electrical problems here.
Bill4342
Minor Friendly
Posts: 24
Joined: Tue Dec 22, 2015 10:51 am
MMOC Member: No

Ser11 semiphore switch.

Postby Bill4342 » Thu Nov 28, 2019 5:02 pm

Hi, Anyone been brave enough to dismantle & re-assemble said switch. Just got my ser11 back to 1954 by removing flashing indicators (fitted under bumpers) and along with bulbs from ESM I now have bright flashing trafficators. Only problem is that the switch returns very quickly to cancel. With a new one in the region of £100
I am toying with the idea of inspection/repair if poss. Or is it a case of leave well alone!!
Thanks,

Bill.

myoldjalopy
Minor Legend
Posts: 1169
Joined: Tue Jan 29, 2013 10:32 pm
MMOC Member: Yes

Re: Ser11 semiphore switch.

Postby myoldjalopy » Thu Nov 28, 2019 6:13 pm

The pages in this article may help: http://mgaguru.com/mgtech/electric/ts101.htm

Bill4342
Minor Friendly
Posts: 24
Joined: Tue Dec 22, 2015 10:51 am
MMOC Member: No

Re: Ser11 semiphore switch.

Postby Bill4342 » Thu Nov 28, 2019 7:49 pm

Thanks very much myoldjalopy. Very smart reply & very interesting reading. Had a quick read thro & printed off for more detailed read. Nothing that a Moggie owner can't handle with usual care, attention & love. Car bedded for next few salty road months but i will have a go before spring.
Regards & thanks again.

Bill. :o

stevey
Minor Legend
Posts: 1459
Joined: Fri Apr 28, 2006 10:59 am
MMOC Member: No

Re: Ser11 semiphore switch.

Postby stevey » Sun Dec 01, 2019 9:20 am

I found that even replacement of the seal and blocking off the inlet hole I couldn't get mine to hold for more than 30secs before returning. OK for the 1950s I suppose but not much good today. I decided to just remove the spring and allow it to be used manually.


If in Doubt hit it!!

myoldjalopy
Minor Legend
Posts: 1169
Joined: Tue Jan 29, 2013 10:32 pm
MMOC Member: Yes

Re: Ser11 semiphore switch.

Postby myoldjalopy » Sun Dec 01, 2019 10:49 am

30 seconds seems pretty good to me, Stevey! that's a 30 second improvement on mine! :lol:

jagnut66
Minor Legend
Posts: 1933
Joined: Fri Apr 11, 2008 7:28 pm
MMOC Member: Yes

Re: Ser11 semiphore switch.

Postby jagnut66 » Sun Dec 01, 2019 3:36 pm

Hi,
A very interesting article, which prompted me to pull my old one apart:

Original Morris Minor series 2 trafficator switch.JPG
Original Morris Minor series 2 trafficator switch.JPG (897.99 KiB) Viewed 153 times
The vacuum cap with the leather seal is indicated by my pliers (stamped 1961 GPO as an aside - my fathers originally).
It was very stiff, almost stuck in place, and also barely held the trafficators up and illuminated for more than a couple of seconds.
I sprayed plus gas down the gaps round the side to try and free it, to no avail.
In the end I had to drill a couple of very small holes, one on each side of the cap, to lever it out. I don't think where I've drilled them will effect the vacuum effect but if they do I shall have to seal them back up with resin.
When it came free it revealed, as well as the spring, the cut 'O' ring that you see in the centre of the picture.
However I didn't notice this in either the text or the images in the above article, so I think someone must have been in here before me and added this to 'stiffen it up'.
Trouble is, over time, it caused it to virtually grind to a halt! :roll:
The leather is now oiled and seems quite supple, too supple maybe, as it is now very responsive. I shall have to see how it is when reassembled.
However I have tried it with the 'O' ring back in place and it seems that the supple leather then makes no difference at all, the 'O' ring effectively jams it up. So that will now not be going back in again.
As the article says though, watch you don't loose those little nuts.
Also when the vacuum chamber comes apart, watch the final stage as mine 'popped' and I almost lost the spring.
Best wishes,
Mike.
(Still missing) Olwyn Image

jagnut66
Minor Legend
Posts: 1933
Joined: Fri Apr 11, 2008 7:28 pm
MMOC Member: Yes

Re: Ser11 semiphore switch.

Postby jagnut66 » Sun Dec 01, 2019 4:12 pm

Now reassembled --- quicker than writing this post! :wink:
Adjustment appears to be via the grub screw in the bottom of the unit (increases or decreases the vacuum inside the chamber, someone will be along in a second if I'm wrong, if so I will stand corrected), indicated in the picture below.
The unit now seems to work much better, with a distinctive delay between being switched on and it rotating back to the off position.
This is going on my 'free spares' pile beside my car at the next national, at least now I feel I can describe it as 'working' and I'm not just passing on a duff unit for someone else to fix.
I can recommend that article, it inspired me to have a go at something that has 'bad press' (as being unreliable) when, like allot of things on the Minor, it is quite straightforward to strip down and restore it back to working condition.
Just don't loose those nuts or the spring!!.......... :wink:
Best wishes,
Mike.
Original Morris Minor series 2 trafficator switch 1.JPG
Original Morris Minor series 2 trafficator switch 1.JPG (576.78 KiB) Viewed 152 times
(Still missing) Olwyn Image

Bill4342
Minor Friendly
Posts: 24
Joined: Tue Dec 22, 2015 10:51 am
MMOC Member: No

Re: Ser11 semiphore switch.

Postby Bill4342 » Mon Dec 02, 2019 3:17 pm

Thanks again myoldjalopy & other replies. I removed the switch, checked the cotton pad & found it very hard at the point. Fitted a new piece of cotton & grub screw & after some minor adjustment switch operated satisfactorly. Being quite inquisitive, I decided to strip the switch anyway. It was ok inside but I cleaned the leather washer & casings & am waiting for my order of bielectric grease for the rebuild. Thanks all again.
Bill.

myoldjalopy
Minor Legend
Posts: 1169
Joined: Tue Jan 29, 2013 10:32 pm
MMOC Member: Yes

Re: Ser11 semiphore switch.

Postby myoldjalopy » Mon Dec 02, 2019 10:29 pm

Wow! Well done you guys! I'll have to try and sort mine now.....when I get round to it! :lol:

Bill4342
Minor Friendly
Posts: 24
Joined: Tue Dec 22, 2015 10:51 am
MMOC Member: No

Re: Ser11 semiphore switch.

Postby Bill4342 » Tue Dec 03, 2019 9:36 pm

Hi all,
Grease arrived today. Cold in garage but it took me approx 15 min to re-assemble. Greased leather seal & casing & switch working a treat--at least 20-25 seconds. Better longer- can always cancel manually. Still to fit to dash. Almost did not renew my subs to MMOC last month but very pleased that I did. Great group :D :D Total cost under £4.
Cheers guys

Bill 4342


Who is online

Users browsing this forum: No registered users and 6 guests