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Hydraulic Valve plumbing on MTA

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Tom Graham

12-11-2005 17:48:03

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I have an MTA with no hoses coming out of the reservoir. There are two plugs on the left rear, I assume that's where the hoses to the control valve are to be connected. Which one is pressure and which one return?

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gene bender

12-12-2005 03:23:55

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Re: Hydraulic Valve plumbing on MTA in reply to Tom Graham, 12-11-2005 17:48:03

Those are outlets to hook a hose from the cycl the back one is delayed for rear tooling. There is another one on the right side. The lever to pressurize them is on the right side and should come back to the lite bar area on the rite side. There arent any hoses comong from the area where the dist is located? Can you find someone who is familiar with your tractor who would be able to explain what you have and go over the operating procedures?

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Tom Graham

12-12-2005 04:11:53

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Re: Hydraulic Valve plumbing on MTA in reply to gene bender, 12-12-2005 03:23:55

There were no hoses from the live pump back to thereservoir; I had those made. Can I use the control lever on the right side to run the cylinder or do I need to add another valve in the line?

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Nat

12-12-2005 05:17:50

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Re: Hydraulic Valve plumbing on MTA in reply to Tom Graham, 12-12-2005 04:11:53

The control lever on the reservoir only gives you one-way control. It works just like the belly pumps, except that it maintains hydraulic pressure when you press the clutch pedal.

There are two pressure outlets on the rear of the reservoir. They come out of the casting that protrudes from the tank. All other plugs that are in the tank directly are return lines, except the pressure line from the pump to the tank. I believe the top outlet is the main outlet, while the bottom one is the delayed outlet. Unless you're running a set of mounted cultivators, the bottom outlet isn't used.

Run a hose from the top pressure outlet to the "IN" port on an OPEN CENTER hydraulic spool valve. Run a hose from the "OUT" port of the valve to one of the plugs in the side of the reservoir. Run a hose from each of the work ports on the spool valve to a standard pioneer hydraulic quick-coupler at the rear of the tractor.

It is important that the valve is open center, or you run the risk of blowing one of the components in your hydraulic system sky-high from pressure buildup.

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