Posted by rustyfarmall on May 28, 2009 at 07:06:48 from (209.152.78.140):
In Reply to: PTO Over run Clutch posted by Chris (UK) on May 28, 2009 at 06:50:54:
Older tractors had the PTO more or less coupled directly to the transmission, and those tractors DO NEED the over running clutch when running a machine such as you describe. Newer tractors powered the PTO independently of the transmission, and do NOT need the over running clutch. 1955 or so seems to be the breaking point for US built tractors, but that changeover did not include ALL tractors. Some got it sooner, some got it much later.
Basically, if you have to depress the clutch pedal to engage the PTO, you need an over running clutch. If the PTO can be engaged by simply moving a lever, you probably do not need it.
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