In agricultural tractor three-point linkage hydraulic draft control systems, top-link sensing is primarily used for:
Options:
(A) Light to medium mounted implements (such as cultivators and small moldboard plows) where implement draft variations induce detectable compressive reaction forces on the upper link
(B) Heavy multi-ton trailed wagons attached to the drawbar
(C) Stationary PTO hammer mills
(D) Spraying nozzles on the front bumper
Answer Key:
A
Step-by-Step Solution & Explanation
Top-link sensing uses internal torsion bar or spring deflection caused by forces transmitted through the top hitch link to actuate the hydraulic spool valve; lower-link sensing is utilized on high-horsepower tractors for heavy multi-bottom tillage implements.