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Miken
Joined: 24 Dec 2012 Posts: 544
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Posted: Sun Nov 13, 2016 6:43 pm Post subject: Dynamotor |
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I have just bought a 1927 Morris Cowley flatnose.
The pile of receipts that came with it show that it recently had its 12v dynamotor refurbished at considerable cost. However the battery is not being charged.
The voltage cut-out has its cover missing and looks a right horrible ,rusty state so I suspect it may be this which is faulty.
So;
Is there a more modern, readily available alternative voltage regulator that I can fit that will work with it? Will a unit like this http://www.holden.co.uk/displayproduct.asp?sg=1&pgCode=084&sgName=Electrical&pgName=Control+Boxes&agCode=0450&agName=Control+Boxes%2FRegulators&pCode=37182 be compatable?
The dynamotor I have is a A900R which has 2 terminals.
I think originally it used a 3 terminal type which ran a separate earth wire instead of earthing to the car chassis.
Also;
How do I check the the dynamotor is charging.
Thank you and please dont get too technical.
Mike |
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47Jag
Joined: 26 Jun 2008 Posts: 1480 Location: Bothwell, Scotland
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Posted: Sun Nov 13, 2016 9:58 pm Post subject: |
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Mike,
The regulator you picked is unsuitable. The model you are looking for is a Lucas CFR2. There are 3 currently on Eb*y.
Have a read here:- http://www.ppowers.com/lucas_plc.htm#Dynamotor for all you want to know.
Art |
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Miken
Joined: 24 Dec 2012 Posts: 544
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Posted: Sun Nov 13, 2016 11:36 pm Post subject: |
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Thank you Art.
Do you know how to test the dynamotor for output?
It starts the car well enough.
Does that mean its OK?
I dont think it describes checking the dynamotor on the webpage you indicated. |
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Penman
Joined: 23 Nov 2007 Posts: 4751 Location: Swindon, Wilts.
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Posted: Mon Nov 14, 2016 1:00 am Post subject: |
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Hi
Quote: | The 'yellow' wire from the dynamotor D terminal is the main positive charging current output and it goes to the cut out and thence to the battery through the car's ammeter. The 'green' wire from the dynamotor comes from the dynamotor F terminal and goes to an F terminal on the cut out and thence to the lighting/charge PLC switch. |
Doesn't this sentence imply that you could check for current through the yellow wire? _________________ Bristols should always come in pairs.
Any 2 from:-
Straight 6
V8 V10 |
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jp928
Joined: 07 Jun 2016 Posts: 249 Location: Australia
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Posted: Thu Dec 22, 2016 8:33 am Post subject: |
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I would look at the cutout first. I have a 26 Rover 9 - picked it up recently, 80% restored, including all the electrical parts - 20 years ago. Once I got it running, I had no charging , but a Digital multimeter showed higher than expected volts, that seemed erratic. After checking everything I could think of, I finally took the facia off the central switch panel and gave the cutout points a clean with fine wet-and-dry emery - stable volts, 10A charge! If your cutout looks bad, clean it up and give the points some attention.
jp |
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trampintransit
Joined: 09 Aug 2010 Posts: 166 Location: Edinburgh
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Posted: Thu Mar 02, 2017 8:54 am Post subject: |
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Hang on ..if it's a dynamotor ..that's an alternator...and therefore should incorporate its regulator? ...rendering the control box all but redundant?... Presumably you have a dynamo...but yes I agree with the above...sort out that control box and give everything in the chain a good clean, including the ignition switch.....and main earth! _________________ '60 Armstrong Siddeley Star Sapphire
'80 Reliant Scimitar
'47 Jaguar MKIV --- in bits!!!! |
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47Jag
Joined: 26 Jun 2008 Posts: 1480 Location: Bothwell, Scotland
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Posted: Thu Mar 02, 2017 11:05 am Post subject: |
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Quote: | .if it's a dynamotor ..that's an alternator.. |
A dynamotor is exactly what it's name says, a dynamo that is also a motor. It's only recently in historical terms that alternators have been fitted with integral regulators. Originallly alternators had external regulators.
Art |
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Bitumen Boy
Joined: 26 Jan 2012 Posts: 1733 Location: Above the snow line in old Monmouthshire
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Posted: Thu Mar 02, 2017 12:30 pm Post subject: |
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47Jag wrote: | ...Originallly alternators had external regulators.
Art |
And some lingered on surprisingly late. We had several 82-84 Triumph Acclaims (Honda Ballade re-badged by BL) which all had a separate bobbin-type regulator for the alternator. It must have been a bit of an oddity by then, I guess, but they never gave us any problems. |
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trampintransit
Joined: 09 Aug 2010 Posts: 166 Location: Edinburgh
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Posted: Sat Mar 04, 2017 11:26 am Post subject: |
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Yes ,sorry, I was not paying attention....dynamotor is really a prewar thing isn't it? Starter and dynamo in one....ah...to own a prewar car!!!!
I was confusing ti with one of those Dynalite thingies... _________________ '60 Armstrong Siddeley Star Sapphire
'80 Reliant Scimitar
'47 Jaguar MKIV --- in bits!!!! |
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Phil - Nottingham
Joined: 01 Jan 2008 Posts: 1252 Location: Nottingham
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Posted: Sat Mar 04, 2017 4:15 pm Post subject: |
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Dynastarters were used on 2 stroke micro cars of the 1950's 1960's. My mam's Goggomobile had one - Bosch. It worked well with its 2 stroke 350cc twin _________________ Rover P2
Rover P4
Rover P5 & P5B
Land Rover S2 & S3
Morris Mini Traveller Mk2 |
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