Author Topic: Douglas mk 5 magdynamo  (Read 4501 times)

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Offline Radiofree

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Douglas mk 5 magdynamo
« on: 15 Mar 2009 at 19:49 »
Hi
does anyone have a service manual for the magdynamo mn2l fitted to the Mark  5 or a pdf or know where I could purchase one.
The mag is producing great sparks, but there does not seem to be any output from the dynamo. I have just started to check the external wiring, but I think there is no output. I am in the first stages of exploring the fault.
thanks
doug

Online eddie

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Re: Douglas mk 5 magdynamo
« Reply #1 on: 15 Mar 2009 at 20:13 »
Doug,
          If your dynamo hasn't been used for some time, there may not be anything wrong with it, other than it has lost it's residual magnetism. To rectify this, remove the 2 wires from the dynamo, then with another length of wire, connect the live side of the battery to the 'F' terminal for about 3 seconds. (There will be a spark and about 3 amps discharge from the battery). This will re-magnetise the field coil to the correct polarity to match the battery. Then reconnect the 2 wires and run the engine. If there is still no charge, you will need to check out the regulator.
                                 Regards,
                                              Eddie.

Offline Radiofree

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Re: Douglas mk 5 magdynamo
« Reply #2 on: 16 Mar 2009 at 08:32 »
Eddy
thanks, will give that a go. It has not been used for some years.
doug

Offline Marcello

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Re: Douglas mk 5 magdynamo
« Reply #3 on: 19 Mar 2009 at 18:48 »
Hello:

is posible donwload technicals manuals of Lucas in this site:

http://www.ajs-matchless.info/en

See archive - technical - electric - Lucas

Marcello.