With the tractor in low range, step on the foot-n-inch pedal (where the clutch would be if it was a gear drive), move the hydro lever into the blue area of quadrant, half throttle or so, hold the brakes, and let out the f-n-I pedal. A good hydro will overpower the brakes. In high range, same procedure, it should stall the engine. If the hydro starts whining instead of moving, the hydro has a problem.
you can get the hyd oil warmed up some, by putting the hi-lo lever in neutral and pushing the hydro lever up about halfway, before you test the hydro. i screwed up on a 186 hydro one time by trying it when the oil was stone cold. seemed ok but it wasn't.
for $2800, i'd be tempted to take a chance, unless there is a major problem like worn out tires. i had the hydro on my 826 rebuilt at hoober's for $2300, plus i split the tractor and put it back together. i didn't think that was too bad for a new hydro. you may not even need to do that much.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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