Search found 306 matches

by Gard
Tue Dec 24, 2019 2:41 pm
Forum: DBTC Forum
Topic: Crank scroll seal
Replies: 10
Views: 1054

Re: Crank scroll seal

On some engines the crankcase is vented to the intake manifold, this will create a small negative pressure (vacuum) in the crankcase when everything is working correctly. As Ollek states, when the the motor gets older, and rings worn, there will be enough blow by of the rings so the there can be a p...
by Gard
Fri Dec 20, 2019 2:07 pm
Forum: DBTC Forum
Topic: Reduction unit Special C spanner
Replies: 8
Views: 949

Re: Reduction unit Special C spanner

cobbadog, nice job on the pullers. To answer the original question, I measured the spanner I made for disassembling the final drives on a 990 implematic, it looks to be 4" diameter. I cut it from 7/16 steel plate with a torch and cleaned it up with grinder, not as pretty as the purchased one but wor...
by Gard
Mon Dec 16, 2019 11:44 pm
Forum: DBTC Forum
Topic: Voltage Regulator / Dynamo
Replies: 16
Views: 1500

Re: Voltage Regulator / Dynamo

philedge, thanks for the additional info, This is different from the manual I have and may be more appropriate for someone with a selectomaatic tractor.
by Gard
Mon Dec 16, 2019 2:29 pm
Forum: DBTC Forum
Topic: Voltage Regulator / Dynamo
Replies: 16
Views: 1500

Re: Voltage Regulator / Dynamo

In my case it was the electrical points being corroded and worn out on the old unit, The rivits needed to be drilled out to access the interior. I would not be too surprised if the new unit needed to be adjusted, I think the paint on the screws may be more about anti-vibration than tamper proof. Cer...
by Gard
Mon Dec 16, 2019 1:53 pm
Forum: DBTC Forum
Topic: Voltage Regulator / Dynamo
Replies: 16
Views: 1500

Re: Voltage Regulator / Dynamo

Philedge, I think this is the link to the site with various manuals https://sites.google.com/site/deerebrown/david-brown-info-ii However the description on a lot of them is a little lacking. Could you provide the exact name of the manual that has the chapter on electrics? The document I have is 32 p...
by Gard
Sun Dec 15, 2019 12:03 am
Forum: DBTC Forum
Topic: Voltage Regulator / Dynamo
Replies: 16
Views: 1500

Re: Voltage Regulator / Dynamo

I have a soft copy of lucas technical service overseas correspondence course section 5 generator output control. PDF file it has a lot of information on troubleshooting and adjusting the generator and voltage regulator. I found it very useful and was able to get my old regulator working. I do not kn...
by Gard
Wed Dec 11, 2019 1:05 am
Forum: DBTC Forum
Topic: DB 990A Implematic Hydraulics Not Working
Replies: 39
Views: 3297

Re: DB 990A Implematic Hydraulics Not Working

My suggestion is to mess around with it some now if you want to but plan on draining the oil and flushing with diesel in the heat of next summer. What I did was drain the oil into a large container, let it sit for hours or days then decant off the top 4 gal, then I put the bottom gal in a glass cont...
by Gard
Fri Dec 06, 2019 11:16 pm
Forum: DBTC Forum
Topic: DB 990A Implematic Hydraulics Not Working
Replies: 39
Views: 3297

Re: DB 990A Implematic Hydraulics Not Working

there is a large plug, guessing about 1" on the right front side of the transmission cover, I usually add oil there, in my case there is a return from the loader going in there. There is another plug with a square recess in the back, on top of the PTO transmission if I remember correctly. I guess yo...
by Gard
Fri Dec 06, 2019 10:52 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10710

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

My apologies, my spelling has always been bad and its not getting any better with age.
Is the rest of your tractor UNF inch size or BSF?
I would guess your 965 880 would be mostly UNF? my 1965 990 is.
I bought the whitworth wrenches and taps and dies when I got the older 950 tractor.
by Gard
Fri Dec 06, 2019 8:38 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10710

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

The wentworth wrenches and sockets are available on the internet for reasonable prices, or if you know someone who works on old Brittish motorcycles or cars... Or perhaps hit a spare 1/2 or 13 mm wrench with the grinder. I remember reading someplace the date when they stopped using the wentworth thr...
by Gard
Fri Dec 06, 2019 2:14 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10710

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

As to the question about bolt size it may be that it is a wentworth (BSF) bolt?
I am sure the pump will come out much quicker this time after having done it recently...
by Gard
Wed Dec 04, 2019 8:05 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 10710

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

I agree with ALANJ, I was successful in rebuilding a pump, someone on this forum pointed out there would be a O-ring under the bottom bush, this was replaced along with the refitting and reshimming. Removing the bottom bushings was a project due to the scoring but it needs to be able to move, float....
by Gard
Sat Nov 30, 2019 3:32 pm
Forum: DBTC Forum
Topic: 990 Implematic
Replies: 15
Views: 1399

Re: 990 Implematic

I have a 990 Tractor 990/UA serial 478280 1965, implematic, it has a 3 way valve with 3 knobs, the axle casting is different from the 950 that can have the 2 way valve fitted. If the earlier 1964 990 tractors were fitted with the 2 way valve, it must of been around 1965 they changed to 3 way? As I u...
by Gard
Thu Nov 28, 2019 9:09 pm
Forum: DBTC Forum
Topic: 990 Implematic
Replies: 15
Views: 1399

Re: 990 Implematic

I have a 990 implematic but mine has a 3 way valve, some of the manuals have a user instructions but some are lacking. I admit it took me awhile to get comfortable with it. What I often do to run the loader is; lower the rear 3 pt hitch at least a little way down from max raise screw in the valve, t...
by Gard
Tue Oct 29, 2019 11:35 pm
Forum: DBTC Forum
Topic: Injection Pump Inlet Filter
Replies: 24
Views: 2648

Re: Injection Pump Inlet Filter

Alan, thanks for the tip, I think I will give that a try since the tractor is running good now. How would you go about trouble shooting a engine that will not start? How much fuel should come out of the return line when cranking the starter? It seems that a pump should output a specific flow at a sp...