Search found 3828 matches

by ollek
Thu Nov 07, 2019 6:18 pm
Forum: DBTC Forum
Topic: 780 Control Valve
Replies: 4
Views: 185

Re: 780 Control Valve

I think you have the selector switch in the TCU position. Please select height (position) control. It you do not know how to do the selection or what draft, height and TCU means, please get yourself a Operators Manual. To get a manual, use the following link http://www.davidbrownparts.com/Books%20an...
by ollek
Thu Nov 07, 2019 10:48 am
Forum: DBTC Forum
Topic: Front Loader
Replies: 4
Views: 273

Re: Front Loader

A modern loader is not a quick attachable one if you have to disconnect cylinders and pipes. The hydraulics are connected between the loader and the loader operating valve by means of quick couplers, if the loader is a quick attachable loader. Some old loaders used to be called quick attachable and ...
by ollek
Thu Nov 07, 2019 8:25 am
Forum: DBTC Forum
Topic: 885/1290 valve chest
Replies: 2
Views: 179

Re: 885/1290 valve chest

The valve chest from a 1290 will physically fit, but there is no TCU valve in a 1290 valve chest. All other functions are the same in both valve chests.
by ollek
Thu Nov 07, 2019 3:33 am
Forum: DBTC Forum
Topic: 780 Control Valve
Replies: 4
Views: 185

Re: 780 Control Valve

Yes there is 2 springs, one on top of the by-pass valve and one on top of the hold valve. Both springs are the same. If the tractor has a dump valve, then this valve is fitted in stead of the plug on top of the spring in the hold valve and there have to be a spring under the dump valve, same as in t...
by ollek
Wed Nov 06, 2019 5:44 am
Forum: DBTC Forum
Topic: Front Loader
Replies: 4
Views: 273

Re: Front Loader

Some pictures of the loader and is fittings are needed (both sides).
by ollek
Mon Nov 04, 2019 9:45 am
Forum: DBTC Forum
Topic: DB 780 Selectamatic radiator leak
Replies: 5
Views: 212

Re: DB 780 Selectamatic radiator leak

I recommend you take the radiator to a well known radiator repair shop.
by ollek
Sun Nov 03, 2019 12:52 pm
Forum: DBTC Forum
Topic: 4600 selectomatic
Replies: 22
Views: 611

Re: 4600 selectomatic

Does the engine have injection pump and injectors (diesel engine) or coil, distributor and spark plugs (petrol engine)? What fuel are you running the engine on? Remove the bonnet and take some photos of both the left and right hand side of the engine. Please also supply a photo of the 3-point hitch ...
by ollek
Sat Nov 02, 2019 9:05 pm
Forum: DBTC Forum
Topic: 4600 selectomatic
Replies: 22
Views: 611

Re: 4600 selectomatic

Please try the following Canadian company for David Brown parts. http://ontariopartshotline.ca/david-brown-4600-tractor.html There can be other parts outlet as well, but I found this with a simple Google search for David Brown 4600. And then, Case works with industrial machines (painted yellow) and ...
by ollek
Sat Nov 02, 2019 5:08 pm
Forum: DBTC Forum
Topic: Electrics
Replies: 4
Views: 187

Re: Electrics

There is a diode in the system. The diode is fitted in one of the ground leads for the hydraulic warning light lamp. The diode is open for ground trough the diode to the alternator when the alternator is not charging. This enables the driver to check that the bulb is OK as the light will be on when ...
by ollek
Sat Nov 02, 2019 10:40 am
Forum: DBTC Forum
Topic: 4600 selectomatic
Replies: 22
Views: 611

Re: 4600 selectomatic

The picture showing the steering also shows that the hydraulic steering, including the steering shaft (look's to be home made) and the steering valve, are fitted by someone after the tractor was originally sold. It is most likely that the tractor originally had mechanical steering. The setup looks a...
by ollek
Fri Nov 01, 2019 5:15 pm
Forum: DBTC Forum
Topic: 4600 selectomatic
Replies: 22
Views: 611

Re: 4600 selectomatic

Find some instructions in the following link in how to reduce the size of the photo viewtopic.php?f=18&t=5257
by ollek
Thu Oct 31, 2019 2:29 pm
Forum: DBTC Forum
Topic: 4600 selectomatic
Replies: 22
Views: 611

Re: 4600 selectomatic

I have never heard about a 4600 Selectamatic with Implematic hydraulics. This was, to my knowledge, something in conjunction with diesel engine tractors only. Selectamatic labelled tractors with Implematic hydraulics was made for the USA only, and the model designation was for example 880UE, the let...
by ollek
Thu Oct 31, 2019 5:53 am
Forum: DBTC Forum
Topic: 4600 selectomatic
Replies: 22
Views: 611

Re: 4600 selectomatic

If you Google "David Brown 4600 Selectamatic", and find the Tractor Data home page, you will get a lot of information. First of all, your tractor has a 3-cylinder gasoline engine, made by David Brown, as supposed to the diesel engine used in the agricultural version of the tractor. I think the 4600 ...
by ollek
Sun Oct 27, 2019 11:14 am
Forum: DBTC Forum
Topic: Pick Up Hitch 780.
Replies: 4
Views: 252

Re: Pick Up Hitch 780.

Whatever tractors it is from, its only the hook parts. All mounting parts and parts for lifting and lowering the pick up hitch are missing, and that is most of it. It is a non usable item (scrap), and of course, sold at eBay, the shopping centre for rubbish. The following is a page from the parts ca...
by ollek
Thu Oct 24, 2019 6:28 am
Forum: DBTC Forum
Topic: David Brown Cropmaster speed?
Replies: 12
Views: 409

Re: David Brown Cropmaster speed?

All engines are built for a designed revolution span. Over speeding a engine is always a bad ide, as it can result in a major brake down.