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PhanDad

Runaway '16'GTH-L

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PhanDad
My house is on a hill and today while mowing I stopped the tractor and got off to pick up some sticks that had come down from recent thunderstorms. The tractor was almost at the bottom of the front lawn hill (thank goodness) pointing downhill toward the street. Parking brake not set (never used it on my Vickers Homelite T12). You can guess what happened. [:0] After a few minutes I hear a small "pop", then the "whine" sound the Sunstand hydro makes when being pushed. The tractor was rolling downhill and before I could get to it, it hopped down the curb and about 10 feet into the street. Lucky for me I live on a cul-de-sac with little traffic. No apparent harm done. Guess I'll be parking on level ground or using the parking brake from now on with the GTH-L. I guess I developed a bad habit with the Homelite with Vikers hydro over the years - it would only very slowly creap down a hill, never "release" and "freewheel". Is this behavoir common with the Sundstrand hydro or symptomatic of an air leak? Or just the difference between the mechanical release of the Vickers vs the hydraulic release of the Sunstrand?

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Kent
It happened to me too... the hydro bleeds down it it runs away... :( My HB-216 has a Sundstrand transplanted in... I wasn't as lucky as you. Mine went down off a 4' bank and hit a 3" sampling. Dented the hood, bent the grille frame, and even shoved the dashboard back about 1" on one side. I can't be sure but I think when it went down off the bank it snapped one of the BGB mounting bolts. It self-destructed when the input shaft bearing came out about a month later, and when I tore it down I found one bottom mounting bolt loose and the other one snapped...

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HubbardRA
My Sunstrand in my 716H is the same way. It doesn't even have the mechanism to trip the freewheeling valves on it, yet if it sits for a while I can push it by hand. Pressure appears to leak down rather quickly on these units. Don't get me wrong, otherwise, I love these Sunstrand hydros.

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