Subtopic: Hitch systems and hitching of tillage implements
Question Statement:
When hitching a trailed mouldboard plough to a 2WD tractor, if the line of pull does not pass through both the center of resistance of the plough and the center of pull of the tractor in the horizontal plane:
Options:
(A) Side draft is created, which tends to steer the tractor front wheels off course and increases steering effort and fuel consumption
(B) The plough operates at zero draft resistance
(C) Plowing depth automatically doubles
(D) Drive wheel slip is completely eliminated
Answer Key:
A
Step-by-Step Solution & Explanation
When the horizontal line of draft does not align with the tractor centerline of pull, horizontal side draft develops. This produces a yawing moment on the tractor, forcing the operator to constantly steer against the pull and increasing tire scrub and fuel consumption.