I have a Case 646- the hold back going downhill works great. The earlier 646's may not have had the hold back feature built in to the hydraulic control valve. I have a Case 444 with no hold back built in, and it also has a grinding noise going downhill- it's normal and won't hurt anything. What happens if you release the travel pedal going downhill? You could probably add downhill holdback by replacing your hydraulic valve with a newer one- Jack
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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