It could be dirt accumulated under the operating lever under the dash, the lever could be loose where it bolts to the valve body also under the dash. More than likely the pto brake is worn out,which requires the tractor to be split. The brake is meant to hold the pto shaft only still. If the lever is pulled all the way down to brake with a rotating pto load(rotary mower,baler etc) it will wear the brake out in no time. Also warped pto clutches will override and wear out the brake.
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
... [Read Article]
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