David Brown Tractor Forum

All sorted then! Thanks for your help!

Update (and thank you very much for all your help). I removed the temperature gauge (manufactured by AC) from my 770 and fitted it to the 880. This gauge had a terminal for earth so I connected it to the chassis (strangely the previous gauge didn't have this option). I've just done two hours' of gra...

Hello all,

I'm now looking at this issue again, and am now convinced that the dynamo's faulty. I bridged the D and F terminals and measured the output at D to be 0.4v

This dynamo is a Prestolite.

Thank you.

Thanks for your replies. I did the test again from cold (well, it's been an hour or two since I last did the test, so from lukewarm). I took the block and head readings from the n/s. After 10 mins at 800rpm; gauge pointer is in 'Hot'; top hose is 30 deg C, bottom hose is 20 deg, block is 55-60 deg a...

The newly-fitted temperature gauge to this tractor is showing that the tractor is getting hot in a short space of time. I noticed it when harrowing - I'd barely done two rows and the needle was in 'Hot'. I've fitted a brand new thermostat, but the problem continues. The gauge needle shoots to 'Hot' ...

Done! Thank you very much!

Does anyone know the process for renewing the seal on the push-pull fuel tap? I have the cork seals ready; is it a fiddly job?

Many thanks

Thanks, everyone. This is a great help!

As Spring approaches, my mind turns to doing a few jobs to the 880 and I've remembered about a particular problem in the linkage. At the tractor end of the link arms there's a pin that connects the arm to the chassis, and the receiving hole in the chassis has worn significantly and therefore there's...

Thanks for your reply. When the tractor passes 1300RPM the charging light extinguishes. As soon as the tractor returns to 1300RPM the light comes on again.

This new dynamo is labelled as 11amp. Does this sound correct for the tractor?

Just to keep you updated, I bought a brand new dynamo and regulator, polarised the dynamo, and fitted them both, but the charging light still won’t extinguish until 1300RPM. I removed an original dynamo from a 770, fitted it to the 880 and all was well. I removed that, re-fitted the new dynamo and t...

Thanks for the replies. The fan belt’s at the correct tension and the pulley was removed from the previous dynamo and put onto the new one. The problem with the original dynamo is that it seized while the tractor was working and the first I noticed was that the charging light came on and I saw the s...

I've fitted a new dynamo but now the charging light will only begin to extinguish at 1300rpm and will be fully-extinguished at 1600rpm. Any ideas why this is happening? On the previous dynamo the charging light would have disappeared at 800/900rpm. Many thanks.

I have a 1948 Cropmaster petrol/tvo. Last summer I changed the cork seal in the changeover tap due to a leak. Since then, whenever the tractor starts to pull uphill the engine stops. The tractor will then start again quite easily on the handle and will progress again up the hill for a few yards unti...

Solved! The o-ring was on the plunger.

Thank for your replies.