Subtopic: Overload safety devices used in farm machinery
Question Statement:
An overrunning clutch (freewheel clutch) is installed between a tractor PTO and a high-inertia implement (such as a rotary slasher or large forage flywheel) primarily to:
Options:
(A) Prevent the rotational kinetic energy of the heavy implement rotor from driving the tractor forward when the tractor master clutch is disengaged
(B) Double the rotational speed of the implement shaft
(C) Eliminate torsional vibrations at all engine speeds
(D) Provide automatic reverse rotation to unclog jammed stalks
Answer Key:
A
Step-by-Step Solution & Explanation
When a tractor operator disengages the clutch to stop, a heavy spinning rotor acts as a flywheel. Without an overrunning clutch, kinetic energy feeds backward through the PTO into the transmission, propelling the tractor forward into obstacles.