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Re: Char lynn power steering system
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Posted by Joe (Wa) on September 07, 2004 at 20:53:41 from (67.5.130.106):
In Reply to: Char lynn power steering system posted by Chester-Ia on September 06, 2004 at 18:29:17:
The typical Char-Lynn torque generator used on tractors is p/n 217-1015. Requires 3.5 gpm @ max 1000 psi. The motor needs to be turning at about 100 rpm to be effective, this is relative to the gpm. When you turn the steering wheel the torque load increases so the pump has to be able to provide a higher pressure to maintain the same gpm for the motor rpm. My pump is factory for Case 311B, 4 gpm, relief valve is 1050 psi. I put a gauge on the pump. The pressure required to provide the gpm to rotate the motor is about 150 psi. In normal driving, the pressure varies between 150 & 500 psi. Max pressure I have seen with the tractor in motion and about 1000 lbs in the FEL is about 700 psi. The motor is not capable of turning the wheels with even a light FEL load if the tractor is not moving, pump goes in relief. I am now using ATF per the tractor mfr's manual but did run it on the tractor hyd pump using general purpose hyd oil for a year or so while the pump was down. Joe
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