Search found 3898 matches

by ollek
Mon Jan 27, 2020 5:40 pm
Forum: DBTC Forum
Topic: 995 Hydraulics
Replies: 8
Views: 483

Re: 995 Hydraulics

You will have to remove both wheel rerductions before you can split the tractor betwen the rear axle and the gear box frame. The crown wheel and differential is a part of the grear box. The gear box in a David Brown tractor is a separate unite inside the gear box frame. Removing the rear axle will a...
by ollek
Mon Jan 27, 2020 12:48 pm
Forum: DBTC Forum
Topic: 995 Hydraulics
Replies: 8
Views: 483

Re: 995 Hydraulics

Nothing to wonder about. This is the pipe from the valve chest to the lift cylinder, and it can burst if the tractor is driven over very rough ground in very high speed with a implement connected to the linkage that needs maximum pressure to be lifted, Vibrations in combination with high pressure ov...
by ollek
Mon Jan 27, 2020 7:03 am
Forum: DBTC Forum
Topic: 995 Hydraulics
Replies: 8
Views: 483

Re: 995 Hydraulics

At least the following has to be removed: PTO unit, both wheel reductions, differential and crown wheel, "camels hump" and pipe locking plate, operating lever housing on the front rh side of the rear axle.
by ollek
Sun Jan 26, 2020 2:25 pm
Forum: DBTC Forum
Topic: Top link
Replies: 5
Views: 105

Re: Top link

You have to compare the 880 with a 990, not with a 885. The difference in measurements are depending on the tractor size. A 770, 780, and 885 are small tractors, the 880, 990, 995 and 996 are medium size tractors and the 1210 is the biggest model at the time. You can see the same differenses in the ...
by ollek
Sun Jan 26, 2020 2:09 pm
Forum: DBTC Forum
Topic: Top link
Replies: 5
Views: 105

Re: Top link

The 880 is a bigger tractor than the 885. The 885 is the size of a 770 or 780 and the 880 is of the size for a 990
by ollek
Sun Jan 26, 2020 11:29 am
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, adding thermostart
Replies: 8
Views: 153

Re: 1965 David Brown 880UE Implematic, adding thermostart

The following link takes you to a page in the parts catalogue, showing the two different setups used https://partstore.caseih.com/us/parts-s ... 6ar1271837
by ollek
Sun Jan 26, 2020 5:47 am
Forum: DBTC Forum
Topic: Top link
Replies: 5
Views: 105

Re: Top link

Where are you getting all this different length from? The Implematic top link is longer than the Selectamatic top link because the connecting point in the Implematic is further to the front. The front end is Cat 1 and the rear end can be Cat 1 or Cat 2 (early tractors had Cat 1 in both ends). Please...
by ollek
Sat Jan 25, 2020 2:06 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 2703

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

As informed in the Operators Manual, the cable must be fully retracted (disconnected) for the tcu valve to be fully closed. You must ensure that the cable is not sticking or stiff to move. If you have any problem with the cable, change the cable. I can not belive that you are using a Selectamatic Op...
by ollek
Sat Jan 25, 2020 12:53 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 2703

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

The seat can not lift off the the pump body as the seat is locked in betwen the pump body and the valve body. If now the valve stricks to the seat, then the oil from the pump has no other way to go, than to push the non return valve open. The oil is now in the piping going to the lift cylinder and t...
by ollek
Sun Jan 19, 2020 11:53 am
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 2703

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

The tcu valve on the right hand side has to be closed for the pump to deliver full pressure to the 3-way valve on the left hand side. A partly or fully open tcu valve will reduce the pressure to the 3-way valve. A leak in one of the pressure pipes will also reduce the pressure available at the 3-way...
by ollek
Tue Jan 14, 2020 6:54 pm
Forum: DBTC Forum
Topic: Cropmaster petrol to diesel
Replies: 18
Views: 6036

Re: Cropmaster petrol to diesel

Woody, the original topic was about changing a petrol engine to a diesel and you are now hanging on to this with your question regarding a different problem. Please, open a new topic for your problem.
by ollek
Mon Jan 13, 2020 10:54 am
Forum: DBTC Forum
Topic: 990 Cylinder Head
Replies: 13
Views: 421

Re: 990 Cylinder Head

Earlier 990:s had a 4/49 engine and later a 4/55 engine. Please check the engine model and serial numbers. There can ber a difference in the connection betwen the water pump and the cylindr gead. A short rubber pipe or a flat O-ring.
by ollek
Mon Jan 13, 2020 5:14 am
Forum: DBTC Forum
Topic: 990 Cylinder Head
Replies: 13
Views: 421

Re: 990 Cylinder Head

There are no part numbers starting with a letter F, all David Brown part numbers starts with the letter K. I think you are reading the casting numbers off the cylinder head, The head number can not be found from the head itself, you need to look in the parts catalogu. Please see the following link h...
by ollek
Sun Jan 12, 2020 6:09 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 2703

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

Congratulations on sorting the problem as this as something that no one could imagen. First the pumo was assembled with the rotors swapped left to right and this resulted in no contact betwen the pump drive gears.
by ollek
Fri Jan 10, 2020 11:50 am
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 111
Views: 2703

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

There is no end float adjustments required tor this pump type. Pressurized oil is let into the back side of the end bushings and this is also called pressure balancing. The cutouts in the bushings are clearly shown in the pictures provided by the original poster. This will press the end bushings aga...