DB 880 Selectamatic

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Dspillett
Posts: 21
Joined: Sun Sep 03, 2017 2:13 pm
Location: Ireland

DB 880 Selectamatic

Post by Dspillett » Tue Sep 10, 2019 8:31 am

Lads,

I’m a bit stumped, restored 880 recently, can’t get temp gauge working, I have changed thermostat, temp sender and gauge (modern version with background light), when I earth the wire to the temp sender (at the sender end) the gauge goes hot, which indicates the wiring and the gauge are ok, correct ?, so I changed the sender and the thermostat (just in case) but the gauge won’t move from cold to normal when driving the tractor (mostly vintage runs) although I did give it a hard towing job recently to see if it would move and not a movement, any ideas anyone ? From recollection the db’s I used to drive when I was younger used to sit at ‘normal’ mostly, p.s. I have the luxury of use of a thermal imaging camera and the temps I am picking up around the block, cooling system never seem to be much over 75 degrees C, any advice / thoughts welcome, thanks

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rid54
Posts: 178
Joined: Mon Oct 13, 2014 8:20 am
Location: Vallentuna, Sweden

Re: DB 880 Selectamatic

Post by rid54 » Tue Sep 10, 2019 10:37 am

Is the new gauge suitable for the sender in the engine? I think there are a few different standards out there for sender resistance at hot or cold temperatures.

75-80 centigrades seems like an OK system temp after a while. My 880 takes a long time to get warm under light loads (the thermostat is OK).

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ollek
Posts: 3815
Joined: Tue Apr 10, 2012 1:20 pm
Location: South West Finland

Re: DB 880 Selectamatic

Post by ollek » Tue Sep 10, 2019 1:26 pm

You can not just fit a "modern" temperature gauge. The resistance (ohms) in the gauge has to work together with the temperature related resistance in the sender. The 880 Selectmatic tractor newer had a temp gauge with a background light and this tells me that the gauge you have might not work together correctly with the original sender. Get in contact with Davidbrownparts, so to get the correct sender and gauge for your tractor. The following is a link to the instruments and fittings sold by this company http://www.davidbrownparts.com/Instruments.html

Dspillett
Posts: 21
Joined: Sun Sep 03, 2017 2:13 pm
Location: Ireland

Re: DB 880 Selectamatic

Post by Dspillett » Tue Sep 10, 2019 4:31 pm

Thanks lads,

Ollek - I got a new gauge from David brown parts but originally did not change the sender, just used the old one, then I got a new sender from local case dealers but still not working with new gauge,

From my understanding is that I should have got both items from David brown parts do they would match / work together ?

Thanks
David

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