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D Grader Power Steering
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Pgriswd View Drop Down
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Joined: 25 Mar 2025
Location: South Carolina
Points: 57 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pgriswd Quote  Post ReplyReply Direct Link To This Post Topic: D Grader Power Steering
    Posted: 03 Jun 2026 at 1:43pm
Hello all,

I am putting a Char-Lynn torque generator on a D grader. I was thinking tapping in the existing hydraulic system and would the system have enough pressure/flow for the added load?

Thanks.
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Joined: 12 Sep 2009
Points: 23482 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2026 at 5:07pm
Those old systems needed 3 GPM to work. I'm thinking 1200 to 1500 psi. You'll need what they call (back in the day) a priority valve or a flow divider valve. The hyd pump sends 100% of its oil to it first. It then sends the first 3 GPM (adjustable flow) to the power steering system out the priority port. The remainder of whatever flow the pump can deliver then goes out the secondary flow port to your machine/implement valves.
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Pgriswd View Drop Down
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Points: 57 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pgriswd Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2026 at 7:34pm
Great and thanks Dr. Allis. I will look into a “priority” valve.
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