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#Post#: 84483--------------------------------------------------
Dynamo question (sory non landrover)
DIR By: ProDave
Date: January 26, 2014, 4:34 pm
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Apologies in advance, it's not a landrover question.
My BIL has a problem with the dynamo on his WW2 Jeep.
It's a "type b" configuration, with both field and armature
internally grounded.
the windings (field and armature) both appear okay, a few ohms
resistance.
When in the vehicle, he measures 0V on the field terminal.
that's the bit that sounds wrong to me. Surely the field
winding should be energised (in this case) with 6V dc via the
regulator?
My understanding of these mechanical regulators it patchy but I
thought the regulator exited the field winding and adjusted the
field voltage to regulate the output.
So am I correct in saying 0V on the field winding means the
fault is the regulator rather than the dynamo?
#Post#: 84512--------------------------------------------------
Re: Dynamo question (sory non landrover)
DIR By: Jackual
Date: January 27, 2014, 7:53 pm
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It does sound like a regulator fault, Few things you can get the
BIL to check over. Check you've got power running to your
regulator from the ignition key switch, Check the contact points
in the regulator are clean and pass current & Also check the
regulator is earthed properly, Otherwise none of the coils will
excite, And the points will not operate, and thus not exciting
the dynamo field coils..
Jack.
#Post#: 84519--------------------------------------------------
Re: Dynamo question (sory non landrover)
DIR By: divie
Date: January 28, 2014, 3:29 am
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Quick and easy to fit solid state regulator, I use them on my
old bikes. Available in positive or negative earth, not sure
about car stuff but bike ones available hidden in old style
cases so they look original. Guy in Lincoln is a specialist, not
sure of his trading name something like dynamo conversions?
Google will find him.
#Post#: 84531--------------------------------------------------
Re: Dynamo question (sory non landrover)
DIR By: ProDave
Date: January 28, 2014, 10:28 am
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Thanks
Definitely power to the regulator but nothing coming out.
He won't fit a solid state one, he's a rivet counter. He's
ordered some new old stock parts to rebuild his existing
regulator.
#Post#: 84552--------------------------------------------------
Re: Dynamo question (sory non landrover)
DIR By: divie
Date: January 28, 2014, 1:43 pm
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Ah, a rivet counter counter. I like things to look "Period" but
am not averse to having modern things hiding inside old units.
My motley collection of transport dates back to 1919 and I gave
up rebuilding some 90 year old kit. If only a set of new gearbox
internals for a series where available.............
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