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Case Tractors Discussion Forum
Show Parts for Model:

David Brown Case 995

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Troy W

08-28-2011 08:34:20

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I have a 995 David Brown Case with Case 70 loader. Been through all the fluids and filters and having a issue with the hydraulics. It is the selectamatic system. The issue I'm having is with the loader. The loader raises but only once the three point lever is pushed back into the select position. Then to lower the bucket have to move the three point lever forward to the lower position. Plus the loader will raise on it own as well with the tractor just sitting under idle. Just curious if anyone knows where I should start?

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08-30-2011 04:26:50

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 Re: David Brown Case 995 in reply to Troy W, 08-28-2011 08:34:20  
The loader being faster in "select" makes normal sense as the selectamatic valve diverts the lubricating oil to the pressure side of the system when in this position(you can check that this is what is happening by pulling the rectangular cover off the right rockshaft housing(held by 4 #3 phillips head screws), when not in select, you will see a stream of oil when you look under the cover, when moved to select this stream will stop). I think DB called it "constant pumping" or some such thing.

I would check the o-rings in your loader control valve next.
You also have to remember that you only have a 6 GPM pump, and you probably on get 3-4 gpm of that unless you are in select. That loader was built with a 15-20 gpm pump in mind and had reasonable speed with that(big cylinder bores, and long stroke). Even with a perfect hydraulic system it is going to be slow with what you have.

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Troy W

08-30-2011 08:49:04

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 Re: David Brown Case 995 in reply to RGMartin, 08-30-2011 04:26:50  
Thank you again for all the advice. I'll keep plugging away at it.

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08-29-2011 16:52:40

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 Re: David Brown Case 995 in reply to Troy W, 08-28-2011 08:34:20  
Be careful, that is a huge loader for that tractor. Watch the bolts which hold the engine cradle to the front end( ten 7-16"), and the bolts which are vertical in the front axle(two 3/4" on each side). I have seen them stretch and beak on a tractor with the proper loader. That thing is way more loader than belongs on a 990 chassis.
It is hard to tell from the pictures, do the lower legs of the loader frame go back to the final drives/axle like they would on a 70 series tractor?

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Troy W

08-29-2011 20:08:37

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 Re: David Brown Case 995 in reply to RGMartin, 08-29-2011 16:52:40  

Yes they do the lower legs run back underneath and attach at the rear axle. More pics attached. This is how I bought the Tractor from a dealer. I pulled those valves under the kidney shaped plate and cleaned them and put them back in. It didnt change anything in how the loader operates. Next idea?

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08-28-2011 16:32:07

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 Re: David Brown Case 995 in reply to Troy W, 08-28-2011 08:34:20  
Looking at your pictures, your loader is plumbed into a power beyond type block.

Have you pulled the kidney shaped plate off beside your remote valve(two #3 phillips head screws)? under that you will find 2 aluminum caps that cover the two most troublesome valves in the selectamatic chest. Make sure both move freely in their bores. A tapered wooden dowel works good to pull them out. Make sure you don't loose any of the small parts that live inside the valves.

If one of the above valves is sticky your hydraulic function will be funky to say the least.

Any chance you could take a picture of the tractor and loader together? The 70 is usually seen on a much bigger tractor.

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Troy W

08-29-2011 10:33:19

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 Re: David Brown Case 995 in reply to RGMartin, 08-28-2011 16:32:07  

Attached are the pictures of the loader.

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Troy W

08-28-2011 19:29:44

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 Re: David Brown Case 995 in reply to RGMartin, 08-28-2011 16:32:07  
Thanks for the input. I will take some pics in the morning and upload. Oh, I did rig up a pressure tester line for the remotes. Tested the lines and got 1700 to 1950 psi. So I think I have eliminated the hyd pump itself as the problem.

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08-28-2011 08:57:21

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 Re: David Brown Case 995 in reply to Dutchman, 08-28-2011 08:34:20  
Do you have a 3 or 4 way valve by your right ankle on the tractor?

The loader only working in the "select" position Indicates it is plumbed into the 3 point hitch lift ram. My 1200 is the same way and has a 3/4 way valve to control the function of loader versus the 3 point hitch. It is just as it left the factory. If you don't like this you could always get your loader hydraulics from your remotes.

The loader controls not working right suggests to me that you have a bad O-ring in the loader valve in the lift spool.

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Troy W

08-28-2011 10:01:11

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 Re: David Brown Case 995 in reply to RGMartin, 08-28-2011 08:57:21  

No valve down by right ankle. The loader does work but is slower without using the 3 point lever it moves faster utilizing the 3 point lever. The loader will go down faster once the 3 point lever is pushed forward into the lowering position. It is plumbed into the top of the same area as the remotes just above. I have attached a picture. I thought about switching out the spool valve for the loader as a start.

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