Re: 706 hydraulics running a sprayer pump? Valve s

Posted by Bob on May 27, 2004 at 20:46:29 from (66.163.134.177):

In Reply to: 706 hydraulics running a sprayer pump? Valve shuts posted by andy on May 27, 2004 at 20:22:38:

You can tie the valve in position and run the pump, so long as the hydraulic fluid does not overheat. (Extended use on a HOT day might cause overheating of the oil.)

The drive motors on some of the hydraulic driven centrifugal pumps have a built-in adjustment screw for pump speed.

On the pump motors designed for an open center system, this does what you are proposing, and allows hydraulic oil flow to bypass the motor and return to the tractor. If the motor is so designed, the farther you turn the screw "in" (CW), the less oil is allowed to bypass, and the pump runs faster.

On the motors of pumps designed for closed center systems, the adjustment screw is on the inlet line going into the motor, and the farther the screw is turned out (CCW), the more constant-pressure oil from the closed-center system is allowed to enter the pump motor, speeding it up.

Follow Ups:

• Re: Re: 706 hydraulics running a sprayer pump? Val andy 21:45:00 05/27/04 (1)
  • Re: Re: Re: 706 hydraulics running a sprayer pump? Bob 22:17:17 05/27/04 (0)

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