V. OPERATING INFORMATION HYDRAULIC SYSTEM CONTINUED
Power Steering The full-time power steering system consists of a hydraulic steering motor (mounted on the 1
end of the steering wheel shaft) which is connected to a pair of double-action steering cylinders (fig. 5.22, item 1) mounted to both of the front steering arms and outer leg weldments. This system is powered by one of the hydraulic dual gear pumps driven by the detasseler’s engine. Since these gear pumps are sensitive to engine RPM (the higher the RPM the higher the FIG 5.22
oil flow), it is best to always operate the detasseler at full recommended RPM to ensure maximum steering responsiveness.
Electro-Hydraulic Valves The electro– hydraulic valve (fig. 5.23, item 1), located on the front toolbar controls the lift cylinders in their upward and downward movements. The dump valve (fig. 5.23, item 2), located directly 2
under the operator’s seat, is the main valve which controls the amount of pressure going to the lift valve. The dump (continued on next page) 1
FIG 5.23
42 OPERATING INFORMATION CONTINUED
