Hello , I,ve liked this vid , & you,re obviously an experienced & knowledgeable chap , but , we have got problems seeing just what you,re doing for the most excellent view of the back of your right hand , your vid covers issues that I,ve heard a lot of us out here have got problems with , myself included , so you are potentially solving a lot of problems , worldwide , but could you do it again from overhead ? I,ve learnt from watching your vid how to do some myself . Best Regards .
Hi, good vid very educational, I'm trying to remove the spool on mine(990, same chest) do you have to remove the small screw from the side of the chest to allow the spool to be removed, if your looking from the front it's on the left side (two of them) many thanks
The spool valve is the piece on top of the valve bolt with the two nuts . If this is what you are after you just remove the nuts , I’ll attach a interesting read with a lot of info on for you , give this a read the diagrams are very useful to understand how it all works . vieux.tracteurs.free.fr/pdf/David_Brown_selectamatichydraulics.pdf
Always first with old David browns get the rear hydraulic filter under the back axle changed this can make a massive difference and were well know for clogging up
Hello, I have a question, do these two nuts counter or it somehow aligns this section or just the first tactile is tightened to the op and the second is counterattached? Sorry, I translated with a translator. Regards
Hello sir. I'm having a problem with my Case 380 CK the 3 point isn't working properly. It raises when started but won't go down. But if you shut the engine off you can force the 3 point down by hand. I surely would appreciate your advice. Thank you
Too much oil flow building the pressure up and not allowing it to go down . When you cut the engine and it’s not pumping it allows the pressure to drop down and allow it to lower .
How precise does the adjustment need to be on the spool valve? I have a 996 with the hydraulic arms not going down im pretty sure the spool valve is the problem although I don't have a manual to tell me the settings and im scared if i take it out the I could mess with the adjustment.
Yes a manual is needed to tell you the clearance of the valves and a dial indicator to measure the clearances as they need to be with a very small tolerance
@@JFFarviewFarm Hi again I changed the Valve chest but im still having the same problem with the arms not going down would you know any other potential causes?
@@JFFarviewFarm Yes, I can only push the arms down if I loosen the bleeder screw in front of the piston housing or by removing the dumb valve, but when I start the tractor the arms lift straight back up.
@@JFFarviewFarm good to hear. We got 990 with lift problems slow lifting sometimes lifts ok. . Over 2000 psi on pump. Spool valve seems to be seating down . Cleaned bypass and hold valve. There is the small ball bearing missing in hold valve. Plenty oil flowing in back inspection plate. Flow stops when lift arms are rising. Any ideas ?? Thanks dave.
Yes needs new Hart or donor remove pump Bucket red diesel leave for month Rod that's lower oil pressure valve slides up Down stuck leave strew holds shell it as Hole it turn lower nob pushing valve pass hole and it's ashole get out valves knock out Socket sir clips first adjust valve chest five Thrieds rocker leaver rod locking nut goes to Draf cable at back of tractor four screws take out five bolts take out six bolts both sides arms bolt holds copper pipe on chest Back of mudd hard two copper pipes front Two bolts feed valve chest start at front can See Hart pumping take plates front and back Off start tractor move leaver rod back forward turn valve chest adjuster no Pressure put bolts back in wot take out Won't be make hay next year Fine filter in one valve so not to much heat No ploughing next year took me two years Donor came up newer model pressure on Leaver
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Hello , I,ve liked this vid , & you,re obviously an experienced & knowledgeable chap , but , we have got problems seeing just what you,re doing for the most excellent view of the back of your right hand , your vid covers issues that I,ve heard a lot of us out here have got problems with , myself included , so you are potentially solving a lot of problems , worldwide , but could you do it again from overhead ? I,ve learnt from watching your vid how to do some myself . Best Regards .
Good job
Do you know where I can get injectors pipes for david brown 885
All brown parts are hard to come by now , if you have Facebook join the David brown group it’s great to find parts and info out 👍🏻
I wish to find a mechanic with your knowledge for my 990 selectamatic 🙁🙁
Hi, good vid very educational, I'm trying to remove the spool on mine(990, same chest) do you have to remove the small screw from the side of the chest to allow the spool to be removed, if your looking from the front it's on the left side (two of them) many thanks
The spool valve is the piece on top of the valve bolt with the two nuts . If this is what you are after you just remove the nuts , I’ll attach a interesting read with a lot of info on for you , give this a read the diagrams are very useful to understand how it all works . vieux.tracteurs.free.fr/pdf/David_Brown_selectamatichydraulics.pdf
@@JFFarviewFarmmany thanks for your help
Restoring a 1967 David Brown 770. It was parked for 15 years. At first it had 500lbs of hydraulic pressure, no it has none! Any advice?
Always first with old David browns get the rear hydraulic filter under the back axle changed this can make a massive difference and were well know for clogging up
Hello, I have a question, do these two nuts counter or it somehow aligns this section or just the first tactile is tightened to the op and the second is counterattached? Sorry, I translated with a translator. Regards
What nuts do you mean ?
Hello sir. I'm having a problem with my Case 380 CK the 3 point isn't working properly. It raises when started but won't go down. But if you shut the engine off you can force the 3 point down by hand. I surely would appreciate your advice. Thank you
Too much oil flow building the pressure up and not allowing it to go down . When you cut the engine and it’s not pumping it allows the pressure to drop down and allow it to lower .
@@JFFarviewFarm Thank you
How precise does the adjustment need to be on the spool valve? I have a 996 with the hydraulic arms not going down im pretty sure the spool valve is the problem although I don't have a manual to tell me the settings and im scared if i take it out the I could mess with the adjustment.
Yes a manual is needed to tell you the clearance of the valves and a dial indicator to measure the clearances as they need to be with a very small tolerance
vieux.tracteurs.free.fr/pdf/David_Brown_selectamatichydraulics.pdf try this link
@@JFFarviewFarm Hi again I changed the Valve chest but im still having the same problem with the arms not going down would you know any other potential causes?
@@EpIcGeAr21 is the pressure too high not allowing it to come down ?
@@JFFarviewFarm Yes, I can only push the arms down if I loosen the bleeder screw in front of the piston housing or by removing the dumb valve, but when I start the tractor the arms lift straight back up.
So after stripping chest did it work perfectly?
Not the first time due to age related wear I had to alter the clearance to compensate but after this it works fine and goes up and down like it should
@@JFFarviewFarm good to hear. We got 990 with lift problems slow lifting sometimes lifts ok. . Over 2000 psi on pump. Spool valve seems to be seating down . Cleaned bypass and hold valve. There is the small ball bearing missing in hold valve. Plenty oil flowing in back inspection plate. Flow stops when lift arms are rising. Any ideas ?? Thanks dave.
Yes needs new Hart or donor remove pump
Bucket red diesel leave for month
Rod that's lower oil pressure valve slides up
Down stuck leave strew holds shell it as
Hole it turn lower nob pushing valve pass hole and it's ashole get out valves knock out
Socket sir clips first adjust valve chest five
Thrieds rocker leaver rod locking nut goes to
Draf cable at back of tractor four screws take out five bolts take out six bolts both sides arms bolt holds copper pipe on chest
Back of mudd hard two copper pipes front
Two bolts feed valve chest start at front can
See Hart pumping take plates front and back
Off start tractor move leaver rod back forward turn valve chest adjuster no
Pressure put bolts back in wot take out
Won't be make hay next year
Fine filter in one valve so not to much heat
No ploughing next year took me two years
Donor came up newer model pressure on
Leaver