David Brown Tractor Forum

Hi Geoff and thanks for the added info. The replacement cap arrived today and tomorrow I can pick up the rotor button as it has arrived, finally. The part number on this Lucas box is slightly different to the one you have mentioned and I have tried this one on the dizzy already and it fits. This was...

I initially questioned what I read in the manual about how to install these seals and took the advise and used 4 long studs as guides to lower the block down into position an inch above the frame then dropped it in. I used the #2 Permatex jointing sealant which does not wet and it is still nice and ...

Hi Geoff, Cheers. New cap should arrive here on Monday and rotor now sujpposed to be here Tuesday now which is the correct rotor to suit this model dizzie. As for free play on the bushes it seems to be in good condition with a very small amount of back lash when fitted to the engine. No side ways mo...

It maybe fun to try to remove due to heat and rust. Try soaking it in some penetrating oil for a while then try to undo it.

That is always a possibility but ! Thanks for the detailed reply, it appears that after assembly when the tractor was resprayed I unintentionally wired the coil backwards. Some time over the weekend I wire correct my mistake plus carry out other checks to ensure all is well in the electrics. Cheers ...

I notice that any form of help from the 2 main contributors here has been zero,their silence is deafening.

If you have a local brake shop they should be able to bond new lining onto your band. Our local brake shop does this in their workshop and is not expensive to have new lining bonded to the shoes.

I believe that the wire from the ignition switch which is negative becasue of the positive earth goes to the negative side of the coil. Positive side of the coil goes to the distributor.
All I would like to know is if this is correct?

Another curious question about the coil that I must ask is which way to wire it up. Should the positive wire from the swsitch go to + or - side of the coil?
Something else to consider while you find an answer to my last post as well.

I'm sorry but although the stud maybe close in size the thread pitch and TPI are very different and will damage the thread if the wrong one is used.
One day have a look at a thread chart and study the differences then hopefully you will understand why they are not interchangable.

DO NOT USE M8 that is metric and NOT UNC. they are not compatible. Get anything metric out of your mind it is a ritish made tractor made when they used both UNC and BSF only Go online and buy the said size stud and nut to suit. Even a local nut and bolt shop may have this size as it is a common impe...

Questions for the resident retired DB serviceman.

Is this the correct rotor button for this DX4A distributor?

Is the picture of the distributor in the workshop manual correct for a 1954 30C?

Dont know if this has any effect on my ongoing problem but the condensor wire was in a position that might have allowed spark to jump to earth ??? so I re-positioned it. Also found some 'new old stock' for the Lucas distributor cap still in the box and a Bosch equivalent rotor button GL229 both to s...

I'm interested in seeing your other toy/s

YES