Search found 106 matches

by johnh
Tue Oct 01, 2013 10:39 am
Forum: David Brown Tractor Forum
Topic: gasifying wood boiler
Replies: 13
Views: 11203

i do have central heating run from the oil boiler which works well and means the house is warm when we get up but costs 1000 a year and we have it on as little as possible. the wood burners haven't been connected to any water heating set up as it gets a bit complicated with a mains pressure hot wate...
by johnh
Mon Sep 30, 2013 11:34 pm
Forum: David Brown Tractor Forum
Topic: gasifying wood boiler
Replies: 13
Views: 11203

RE: gasifying wood boiler

these new gasifying wood boilers are designed to burn as hot as possible which gets the most from the wood. you 'batch burn' so that the boiler can be fired once a day whenever you like with all the energy being stored in the thermal store which can then be used when needed instead of only when the ...
by johnh
Sat Sep 28, 2013 11:52 pm
Forum: David Brown Tractor Forum
Topic: gasifying wood boiler
Replies: 13
Views: 11203

RE: gasifying wood boiler

manxmac maybe try some sort of hydraulic shear. erkki, i don't mind if i need the very best oak as long as that equals 1 cord of wood per 450 litre of heating oil as the science says. if i got ash or acacia then ok, i'll burn 1.5 cord per 450 litres that's fine with me too. i just don;t want to be t...
by johnh
Fri Sep 27, 2013 9:44 pm
Forum: David Brown Tractor Forum
Topic: gasifying wood boiler
Replies: 13
Views: 11203

RE: gasifying wood boiler

i've got a rayburn cooker in the DAVID BROWN TRACTORS ARE THE BEST. and a woodstove at the other end of the house so i am used to processing wood, about 10m3 a year usually, and that's not a big problem for me, i leave the tree trunks to dry for a while and then it takes me about 45 minutes per m3 t...
by johnh
Thu Sep 26, 2013 10:48 pm
Forum: David Brown Tractor Forum
Topic: gasifying wood boiler
Replies: 13
Views: 11203

gasifying wood boiler

not a DB question although i do use the tractor to process my fire wood... anyway, i wonder if any of you lads and lasses are running a wood boiler with thermal store, in paricular the newish gasifying type wood boilers. i am thinking of getting one to replace my oil boiler and it seems that it woul...
by johnh
Sun Sep 01, 2013 2:50 pm
Forum: David Brown Tractor Forum
Topic: 990 Handbrake pawl
Replies: 18
Views: 16805

RE: pawl

hi, i just made my new pawl today. a bit of 10mm bolt approx. 13mm long. it was a worn threaded section of the bolt as i couldn;t find anything at all to hand that was non-threaded and 10mm. i didn't cut a notch as i couldn't work out how it would stay the right way up anyway. to install i pushed th...
by johnh
Thu May 16, 2013 12:59 pm
Forum: David Brown Tractor Forum
Topic: 12v water pump ideas wanted
Replies: 9
Views: 5119

RE: 12v water pump ideas wanted

I need about 40 psi at as little as 1.5 litres per min.
by johnh
Thu May 16, 2013 12:35 am
Forum: David Brown Tractor Forum
Topic: 12v water pump ideas wanted
Replies: 9
Views: 5119

RE: 12v water pump ideas wanted

Powerrabbit, if i can get the pressure up a bit i will be alright as the nozzles give out a certain amount at a certain pressure so then it's all about travel speed. at the moment i have a pressure switch in circuit but the little subersible can;t get up enough pressure to make it operate. :(
by johnh
Wed May 15, 2013 9:16 pm
Forum: David Brown Tractor Forum
Topic: 12v water pump ideas wanted
Replies: 9
Views: 5119

RE: 12v water pump ideas wanted

interesting thought..i have got the guts of an old fridge which has a small compressor i could use but i guess it's 240v and would probably get a bit complicated. i reckon a window washer pump would do it, if i knew what kind of pressure these put out.
by johnh
Wed May 15, 2013 8:44 pm
Forum: David Brown Tractor Forum
Topic: 12v water pump ideas wanted
Replies: 9
Views: 5119

RE: 12v water pump ideas wanted

Those pumps would do just fine but i can't justify spending too much on it all. The little caravan water pump which i have already, a comet eco-plus, is fine in delivery volume but not high enough pressure to get a good mist from the nozzles but everything else works ok, if a bit heath robinson, and...
by johnh
Tue May 14, 2013 11:17 pm
Forum: David Brown Tractor Forum
Topic: 12v water pump ideas wanted
Replies: 9
Views: 5119

12v water pump ideas wanted

Hi to all, i am in the process of making a 'crop sprayer' with a boom and i am in need of a 12v pump that would supply maybe 4 litres a minute at 40 psi. of course i could just buy a cheap one from wherever on ebay but i am hoping someone can point me in the direction of a source where i could scave...
by johnh
Thu Apr 04, 2013 9:09 pm
Forum: David Brown Tractor Forum
Topic: tapered shaft fittings
Replies: 5
Views: 3600

RE: tapered shaft fittings

yes, i've thought about the possibility that a taper lock pulley would fit but unfortunately even the smallest taper lock pulleys, 1008 i think, are too big and i have not even been able to find out what the taper is on them just out of interest. thanks anyway though lads for your input. a machine s...
by johnh
Thu Apr 04, 2013 5:41 pm
Forum: David Brown Tractor Forum
Topic: tapered shaft fittings
Replies: 5
Views: 3600

RE: tapered shaft fittings

i suppose i'll have to take the shaft out and get it turned down straight. no wonder those hydraulic motors were such a bargain!
by johnh
Wed Apr 03, 2013 8:40 pm
Forum: David Brown Tractor Forum
Topic: Hydraulic Pump Capacity on 1971 DB990
Replies: 7
Views: 5642

RE: Hydraulic Pump Capacity on 1971 DB990

Thanks for the link Kato but i can't find any more info on this device, even on the okonomi-deler website. do you know what individual hydraulic components it is made from?
by johnh
Mon Apr 01, 2013 10:38 pm
Forum: David Brown Tractor Forum
Topic: Hydraulic Pump Capacity on 1971 DB990
Replies: 7
Views: 5642

RE: Hydraulic Pump Capacity on 1971 DB990

Thanks Kato.

my ram has two hoses which go straight to a double acting valve. what do i need to put in there to give this 2-speed feature? or can you do a circuit diagram?