Search found 306 matches

by Gard
Fri Feb 07, 2020 9:33 pm
Forum: DBTC Forum
Topic: Gearbox Oil
Replies: 15
Views: 3183

Re: Gearbox Oil

I also use the SAE 80W/90 GL-4 Mineral oil in the old tractor. I recently got a more modern tractor, the book recommends warm up of 30 minutes or more at -20C (-4F) if mineral oil is used. I read someplace that warm up was not required with the synthetic oil option (Kubota) so that is what I put in ...
by Gard
Thu Jan 30, 2020 6:37 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, adding thermostart
Replies: 10
Views: 1205

Re: 1965 David Brown 880UE Implematic, adding thermostart

Do you know what the thread size is of your manifold and thermostart? I wonder if it would fit in my 990 implematic.
Diameter and threads per inch are fairly easy to measure if it is not installed yet.
Thanks
by Gard
Sat Jan 25, 2020 6:30 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10723

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

I agree you need the manual for your specific implematic system. I was able to get my implematic TCU system to work by building a simple bracket to hold the cable extended because I did not have a proper top link. The dimensions of the bracket was determined from the manual. My understanding is the ...
by Gard
Fri Jan 24, 2020 10:33 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10723

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

I think you are correct about which valve is which, If you have not done so already, I suggest disassemble and cleaning of each, there are some small passages in them if I remember correctly.
by Gard
Thu Jan 23, 2020 9:47 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10723

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

Its an interesting mystery to me as to what is not working in there. I know I would have a hard time giving up on the original system but I do not have any one tractor that I really need on the farm. I can understand the need to get it working one way or another (external pump) but its kind of a sha...
by Gard
Tue Jan 21, 2020 5:46 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10723

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

I agree it is not a variable displacement pump but based on the description in the manual copied below, I still think the bottom bush needs to be free to move in pump bore. Also I think the bushes need to be thick enough so the O-ring is compressed and sealed when the cover is bolted in place. If th...
by Gard
Mon Jan 20, 2020 1:47 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10723

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

I think what you are seeing is consistent with a pump that is unable to put out enough pressure to overcome the spring on the non return valve shown at 4 in origional diagram or O in second diagram. If I understand correctly you only get flow in the blue path when both valves are raised. Another les...
by Gard
Mon Jan 20, 2020 3:17 am
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10723

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

As stated earlier I also wonder what was the original fault that someone disassembled it (and then put together wrong). I do not know what inspection measurements are for the gears and bushings. One thing in the schematic drawing above is the left one of the 3 way valves that feeds the lift cylinder...
by Gard
Wed Jan 15, 2020 1:24 am
Forum: DBTC Forum
Topic: Cropmaster petrol to diesel
Replies: 18
Views: 7122

Re: Cropmaster petrol to diesel

I have parts lists for a 900, large sections are broken out for the different fuel types, diesel, TVO and gasoline. I think the 900 engine was similar or the same as the cropmaster engines but do not know for sure. It would not be too hard to look up part numbers between the gas and diesel engines. ...
by Gard
Sun Jan 12, 2020 12:32 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10723

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

Congratulations on sorting out the pump problem, in hindsight it is clear from the exploded parts diagram that the drive is on the right. I always tend to put things back the way they were, I think in the future I will also check the parts diagram as they are going together! You never know who was i...
by Gard
Tue Jan 07, 2020 2:00 pm
Forum: DBTC Forum
Topic: flushing out transmission/Hydraulics
Replies: 8
Views: 1044

Re: flushing out transmission/Hydraulics

I also had good luck with the diesel flush. The other thing my owners manual suggests is drain oil when hot, and let it set in a large container. Allow time for the crap to settle to the bottom, the clean oil on top can be carefully decanted and put back in tractor and discard the bottom gallon or s...
by Gard
Mon Jan 06, 2020 11:36 pm
Forum: DBTC Forum
Topic: DB 990A Implematic Hydraulics Not Working
Replies: 39
Views: 3302

Re: DB 990A Implematic Hydraulics Not Working

I looked at my 990 implematic and found the "grub screw" part #3 on the Case IH parts page is a 5/16 BSF bolt, 1.5" long that appears to be threaded full length. The head of the bolt bears on the plunger part #6. There is a lock nut on the front side of the lever. I looked on the brittishfasteners.c...
by Gard
Sun Jan 05, 2020 11:49 pm
Forum: DBTC Forum
Topic: DB 990A Implematic Hydraulics Not Working
Replies: 39
Views: 3302

Re: DB 990A Implematic Hydraulics Not Working

I would be surprised to find BSF whitworth bolts or wrenches at the local hardware store but are easy to find on the internet, in the US, I have had good luck with britishfastners.com
by Gard
Sat Jan 04, 2020 9:18 pm
Forum: DBTC Forum
Topic: 885 retard screw
Replies: 15
Views: 1448

Re: 885 retard screw

That looks awesome, nice job
by Gard
Tue Dec 31, 2019 5:26 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10723

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

I don't know if your pump is the same as mine but I had bushings in the bottom (under the gears) that needed to be removed, there were Orings under the bushings that needed replacement and these bushings need to move somewhat vertically in the pump housing. I think the link should bring you there. I...