If the low side of the TA (mechanical sprag) is good the tractor should move with a good main clutch. The high side (clutch pack)can slip due to low pressure from a weak pump or a leak. The only simple solution would be if the dump valve or its linkage is binding. The dump valve is the one connected to the clutch linkage with the 1/4" x long rod. Unfortunately when what you"ve described happens it is due to leakage inside the TA unit. If your power steering is working OK then you probably need a TA replacement. Many times guys don"t realize their TA is "OUT" on the low side because they will move a light load but not a heavy one.
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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