Posted by JDseller on February 22, 2011 at 20:23:04 from (208.126.196.144):
In Reply to: Massey 583 posted by JBMac on February 22, 2011 at 17:44:24:
If it will not disengage after slipping you have damaged the clutch disk or pressure plate. The clutch disk maybe warped or the facings have stacked up. The pressure plate can have broken a spring or diaphragm and is not fully releasing. There is no way to tell without splitting the tractor.
When clutch plates wear it reduces the free travel clearance. When the free travel is gone then the clutch slips even without you having your foot on it. Your PTO clutch may have needed adjusted sooner than you think because of your heavy usage. The ground drive half may have been fine but the PTO half needed adjusted. I am not sure on MF583 if you can adjust the PTO clutch on a live PTO setup from the outside. Many two stage or live PTOs are set by setting the pressure plate fingers during assembly and can"t be adjusted independent of each other after that. A 7 foot BUSH hog on a 73 PTO hp tractor in heavy right away mowing is at the low end of the range.
This issue shows the weakness of a two stage dry PTO clutch. For real heavy duty continuous use a independent oil bathed clutch will have many fewer issues.
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