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Samro

B Series Starter motor windings.

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I believe there is a company up near Preston that is reconditioning older units such as yours.

I am about to get in touch with them, i need two 432 starters and a CVRT generator looking at.

I do have some spare take off B starters, what parts do you need ?

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Depending on the problem it's also worth having a chat with your local friendly auto electrician.  Most of these things are a militarised commercial Lucas item.

Andy

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Im trying http://www.herefordrewinds.co.uk/

Im thinking any motor of this age has the potential to suffer in the same way, the insulation appears to be breaking down in the windings and they go open circuit once warm, you then have to wait till the motor cools and try again...

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Dear All,

I think that the military B series starter motor has a thermal cut out inside it..  If it cuts out prematurely it may give the symptoms described.  It gave me a lot of problems with my Leyland Martian recovery in the TA.  Fortunately it was dead easy to start on the handle which I had to do frequently.  It was only later that I learnt about the thermal cut out.

In my opinion, a thermal cut out on a military vehicle is criminal.  Firstly, because it could fail or cut out prematurely when the engine would in fact start straight away if the starter would only work.  Secondly, in emergency it may be desirable to move the vehicle just a few feet using the starter even at the risk, and only a risk, of burning out the starter.

Andy is right. there is nothing special about these starters.  A competent, old school, vehicle electrician / engineer should easily be able to fix any problems. It should be still be possible to pick up a s/h but serviceable 24 civvy starter for spare parts. I would definitely ask for the thermal cut out to be disabled.

John

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The original starter on the K60 engine in the FV430s had an thermal cutout but it was removed later for exactly the reasons John describes.  I wonder if the same applies to the B series starters?

Andy

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Ok I found that could help in the end they had to get a guy out of a shed to sort it but seemingly it shares parts with a "ms5-24-4"

The trip plate had broken and clutch/pressure plate was badly worn.

hopefully all sorted ive yet to test will have a look the weekend!

Thanks all.

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