Char-Lynn PS Super M

Chris NW Ind · Apr 16, 2009

Just added a power steering kit to my Super M. Had to replace all the o-rings in the torque generator, but I more or less stopped all the leaks.

Anyway, I'm starting to realize that the pump never jumps to high pressure. When moving, even just barely, the PS works great. However, while standing still it may or may not work. Never once, even if I run the steering to the stops, does the engine change speed or slip the belt. I haven't checked the regulator valve yet. Tried to unscrew it yesterday, but it didn't want to budge and I didn't want to break anything.

I do have ATF in the pump, but maybe I should be using hydraulic fluid?

Any thoughts, Chris B.

Andrew Z · Apr 16, 2009

First thing i would say is that at a stand still they are not going to be really smooth, not sure how hard it is to turn yours. On the Super MD it will turn the wheels not moving but it has to be at least 800rpms to build pressure. Your system maybe air locked too perhaps. What i did one time on a M that the power steering lost all the fluid and drained out over the winter. I jacked the front of the tractor up just enough to get the weight off the front wheels. Started the tractor gave it about 1/2 throttle and turned the wheel back and forth from the stops about dozen times, put it back on the ground and it was fine, no more troubles. Give that a try easy thing to start with anyway.

Andrew

Allan in NE · Apr 16, 2009

Sure sounds like a weak pump, Chris.

Allan

Bob M · Apr 16, 2009

Chris - First thing I’d do is burp the air out of the PS system exactly as Andrew suggests below and see what happens.

If that doesn’t help then suspect a problem the pump – either the pump itself or the relief valve. If it’s the relief valve you should hear a squealing sound from inside the pump when it’s dead-headed - especially when the steering hits the stops. Otherwise the pump is tired and cannot make sufficient pressure.

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I wouldn’t bother changing out the ATF for hydraulic fluid - ATF should work fine. (As far as the Charlynn unit is concerned, ATF is simply hydraulic fluid with red coloring added...)

Also my experience with Charlynn PS on M’s (I have two of ‘em) is even when working properly the PS motor has difficulty turning the wheels when the tractor is stationary and the front wheels are on hard ground. This is particularly true if the tractor has a wide front end.

Char-Lynn PS Super M

Chris NW Ind

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Andrew Z

Well-known Member

Allan in NE

Well-known Member

Bob M

Well-known Member

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