2000 Posts and climbing!!!
Join Date: Mar 2005
Re: 2305 Transmission?
Normally, engaging at high RPM may sound better for the engine, but all that power to accelerate the attachment is transmitted through the tranny. Turning on the PTO creates the so-called "shock load". Acceleration of the load from zero-speed to whatever-speed in a super short time. The shock load is greater at higher RPM because of the available power input from the engine, and the attempt to accelerate from zero-speed to a higher speed that normal, in the same amount of time (less than a second).
Shock load is bad and should be avoided on any machinery, including a tractor.
But if it's unavoidable, then you can only do what works and hope for the best.
A perfect example of how bad shock-load is, is when a drag racer pops the clutch, and shears his drive shaft. If you're pumping so much power (higher engine RPM), something has to give somewhere.