David Brown Tractor Hydraulic oil change 

I have the same issue with water getting into the system due to bad shifter boots. My problem is that the water froze in the filter canister and destroyed the screen. I was fortunate to find a good used screen/valve. The original part was distorted and broken into several parts. If you are in an are where it gets cold, make sure your shift boots are good. Oil will float on the water. After changing the oil and filter, operate all hydraulic controls to their limits several times, drive the tractor and shift through all gears and ranges. Make sure the oil is up to full temperature. Re-track all hydraulic systems to the closed or least extended point. Shutdown the tractor and let it sit at least 24 hours. The water should settle into the filter canister. Then drain the oil again, replace the filter, and refill with all new oils. I understand that the oil is not cheap, but frozen broken & corrosion is more expensive than the oil. This is just from my experience. It worked well for me. Good video and good luck to all!

I am just in the process of changing the filter of my David Brown 990 for the hydraulic transmission your video was very helpful

Thanks for the vid, all these posts are appreciated and informative in some way. One point though, I believe the drain plug at the back you refer to as the 28mm socket size is actually the center rear axil oil drain, 1 of 3, the other two being on the wheel hubs.

If you haven't got a gasket you can make one from a cereal packet, or other cardboard, but do not use corrugated or it will leak, put a smear of grease on the face then press the card onto it taking care not to move the card, remove the card and you will have the joint face marked in grease on the card ready to cut out and use, you can buy proper gasket paper and do the same thing but it comes at a price!, just one thing , do not use the folded corner on the packet as it creates a ridge, if you need a bigger gasket than your corn flakes packet then some artists mounting card comes in a variety of thicknesses, and sizes up to AO, I wouldn't try it as a head gasket but for just about all others its fine, been doing this for over forty five years, a "proper" gasket my be better but a home job is far better than nothing, and at three in the morning its available, hope this is helpful☺.

Super video, some great info.

Just about to change the filter on my 885. Thanks for this - informative and helpful: especially the bit about the spring!!!!

you've got an absolute legend of a machine there, absolutely bombproof and it's like a little terrier ... punches well above its weight! I've had its bigger brother and 880 and it was the same engine with a heavier rear end, 780 was very popular here in Scotland.... if you ever need any help send me a message......ps don't be put off by noisy transmission.... straight cut gears, they all howl!

Thank you for your video. I cringed when you said hydraulic fluid. I've learned from experience that the David Brown Selectamatic transmission oil should be the same weight oil as the engine. I'm working on changing mine again to get my three point hitch to raise and lower. What oil did you use in yours?

Nice I have one question what tipe oil do you use

In my David Brown 780 there is a large spring that sits over the large indent in the bottom of the pan and compresses against the bottom screen filter. Yours is obviously missing and may have been discarded because of the damage to the pan. Anyway, good video.,

I have an 885 and your video is awesome. One problem I have is where do you refill the oil? I have some manuals and none have the hydraulic oil filler location marked.

7/26/2024 When installing a cover with RTV I have an assortment of long bolts with the head removed and a slot cut in the end for easy removal with a screw driver. Use 2 of these across from each other to guide the cover and not smer the RTV. JUST A HELPFUL HINT.

Does the transmission hydraulic fluid system run the 3-point hydraulics as well? Or is it 2 separate reservoir pump systems? Thankyou

What oil did you use great vid

Hi fantastic video, i have a David brown 12/10 the hydraulics wouldn't work at all i took the housing off and the filter was collapsed and so blocked i have never seen anything like it but the problem is my housing isn't round its a different shape i might make a gasket would the filter your using also fit the 12/10

What oil gone in david brown 995 in transmision

Hi Denny's. I need to change mine again soon. Good video. Cheers Calvin

I had no trouble getting new gaskets or any David brown parts for my 780. But I do live in England.

thnx mate this was very helpfull i got to swap it out myselve

I’m about to change mine, I found the gasket on Amazon

Great video! Thank you!

Those filter covers were damaged often because they were totally exposed on those small tractors all the way up passed the 885. The 990 and above were protected by the hitch assembly. Those magnetic filters are next thing to impossible to get

I have a question, why did you use metic tools on the tractor. I have six David brown tractors, I have three 770, one 885, one 995, and a 1200 and I never used metric on them I use stander American socket and wenches.

Very good video. But what tool did you use to take out the fill plug? Kind of seems like a 1/2 socket extension. Please help.

Yesterday's tractor parts has the gaskets and filters for those

Hi Fantastic video would that be the same for the David brown 1210 , did you have to bleed yours mine has the front end loader is there a bleeder valve for the hydraulic system

Where can I get a magnetic filter? I just removed mine and it is destroyed.

I just started working on a DB for my daughter and was looking for a video on where to add hyd. oil as the bucket will not raise; the three pt up and down works fine so I am thinking it must have 2 systems. I do not have a manual as yet and can not find any filler caps. I was hoping to see you fill your system and see where this happens but you cut that out. Also I am not familiar with RTD tried to look it up but found nothing so far.

Thanks for adding the informative video! I purchased a 780 David Brown and used this as a guide. After removing the pan, I've found that I am missing the bottom magnetic filter. I would imagine the person that last changed it, discarded it with the old filter. Are these available and will this hinder the hydraulic system from working? Thank you!

How tight would you recommend the bolts on the filter pan to be?

Did you flush this out before re filling it? If so what did you use and what were the results Did it all go smoothly and work straight away Thanks

Small point and perhaps a bit pernickety but I don't think there's any bolt, nut or drain plug on that tractor that is metric. Good video though

what was the filter number and make you used for your David brown ?

What kind of oil need to put on transmission of db 885

What fluid did you fill it with?

What type of fluid should I use for my db 996 power steering??

i just did it but the 3hsp won't lift? Type of oil? Air trap? Thanks