David brown 995 hydrolics

[Cody Callaghan]

Hi everyone I have a David brown 995 with a low profile cab and when I lift the lift with let’s say transport box on sheel lift and if I put bricks in transport box some time it’ll lift and sometimes it will only lift about an inch is there a dip stick anywhere or sight viewing glass I can check oil level at thanks in advance

 

[Bald n Grumpy]

Most have a sight glass but I'm not sure about the low profile cabs, @Boohoo would be the one to know.
Might just be to many bricks though

 

[Alchad]

See if this helps.

Its copied from the 995 operating instructions which is in the “Files” section of the David Brown Tractor Owners Operators and Enthusiasts `Group on Facebook

 

[Cody Callaghan]

Thanks but is it chest valve or hydrolic pump or will I just find out we’re the oil glass is thanks

 

[Jasper]

Thanks but is it chest valve or hydrolic pump or will I just find out we’re the oil glass is thanks

If you look under the cab on the clutch pedal side somewhere there is a sight glass with a red dot in the middle for the correct oil level (you might have to clean it up first )

 

[Boohoo]

As said the sight glass is on the side of the gearbox. Look between the cab steps and the rear wheel on the clutch pedal side. The filler is around the back on the right of the pto housing. The filler bung should have a recess for a ½" square drive ratchet.

If you've got plenty of clean oil, the filter is clean and it still won't lift put a pressure gauge on it before pulling anything apart.

 

[Boohoo]

The sight glass on our 996, it appears to be fuller than it should be

Ignore the oil slick below the sight glass, it's coming from the orbital valve. Should be an interesting day on the spanners when I get time...

 

[Bald n Grumpy]

The sight glass on our 996, it appears to be fuller than it should be

Ignore the oil slick below the sight glass, it's coming from the orbital valve. Should be an interesting day on the spanners when I get time...

Have needed to do O rings between the orbital unit and the manifold twice on our 996. First time someone did it for me and used of the shelf rings and only lasted a few years,did it myself second time and got O rings from Barcley Williams as they are not standard rings. For a few quid it pays to get the genuine article.

 

[Bald n Grumpy]

Hi everyone I have a David brown 995 with a low profile cab and when I lift the lift with let’s say transport box on sheel lift and if I put bricks in transport box some time it’ll lift and sometimes it will only lift about an inch is there a dip stick anywhere or sight viewing glass I can check oil level at thanks in advance

What oil are you using?

 

[Cody Callaghan]

i have never done anything with the oil I got it parked up in a field for about 3years

 

[Boohoo]

Have needed to do O rings between the orbital unit and the manifold twice on our 996. First time someone did it for me and used of the shelf rings and only lasted a few years,did it myself second time and got O rings from Barcley Williams as they are not standard rings. For a few quid it pays to get the genuine article.

O rings out of a selection box are usually 70 shore hardness, usually need 90 shore for anything under pressure.
I know someone who was factory trained and will check and reseal the orbital if I take it out.

 

[Bald n Grumpy]

i have never done anything with the oil I got it parked up in a field for about 3years

Might just be time for a new filter and an oil change then . Use SUTO for the backend and engine

 

[Exfarmer]

Now, you can get a lot of bricks in a transport box, not sure what these tractors are rated for but I have seen figures max weight of 1.9 tonnes
other wise there are several points
Are3 you in the correct position on the TCU switch that little lever at the back left behind the seat, from memory should be in centre position. only change this with the main quadrant lever fully back
if in TCU position will lift when lever is pushed forwards . this will only give a limited lift up to 900Kg and is not designed for the purpose.
The DB hydraulics we're always very complex compared to other makes and issues were multiple if the oil was not kept very clean and regularly gave problems when trailer tipping pipes connections were not kept meticulously clean

 

[Netherfield]

First thing get a pressure gauge to check pump pressure is correct, can be plugged in to a spool valve or tipping pipe, should be 2,200 lbs or thereabouts.
If it's low it could be the filter is blocking(are you getting the yellow warning light), the oil has water in it(gone milky), the pump is getting worn(mainly through lack of oil because the level is low or the filter blocked), or it could have blown the 'O' ring which is. Behind the pump.
If you remove the PTO unit from the back of the tractor you must remove the pressure switch and it's adaptor from underneath, this is what brings on the yellow warning light, this is were the pump is to be found.

 

[Cody Callaghan]

No yellow light has came on not saying it worka tho here ar two photoa I took the last day

 

[Cody Callaghan]

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[Cody Callaghan]

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[Cody Callaghan]

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[Bald n Grumpy]

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The dot in the centre is where the oil level should be, only use SUTO do not use hydraulic oil.

 

[Netherfield]

When the engine is not running and the ignition is switched on the yellow lamp should light in conjunction with the red alternator warning lamp, with the engine running if the alternator stops charging only the red lamp should light up because there's a diode in circuit to stop it lighting the yellow lamp. Now the only way the yellow lamp should light up is if the vacuum switch underneath operates or the wire to this switch gets damaged and rubs on an earthed part.
If your yellow lamp does not light it's likely the bulb has gone or there's a fault in the wiring under the dash panel or sometimes the bulb holder gets rusty, in winter if the oil gets particularly cold it can take up to half an hour before the yellow lamp goes out, less with a Hydra-shift because it warms the oil much quicker.