Posted by pete 23 on October 08, 2011 at 11:19:34 from (74.32.234.149):
In Reply to: 656 weak pto pressure posted by Yellott Canby on October 07, 2011 at 20:11:14:
Original 806 was set to 185 psi with little problem. Most 656's were hard to get to that point due to the type of linkage they used but I never saw one slip or cause problems at 165 psi. You could go to a heavier spring on the lower end of that valve(the spring that you need to take out that tiny pin to get apart) to get more pressure easier than redesigning the linkage. They changed the valve and springs on larger tractors to accomodate a lock nut and increase the pressure to 235psi . Don't remember if they did that to 656 or not. Many are set higher of course as personal preference. I always liked to see the pto slip before it tore the center section out of clutch backing plate myself.
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