V. OPERATING INFORMATION HYDRAULIC SYSTEM CONTINUED
Power Steering The full-time power steering system consists of a hydraulic steering motor (mounted on the end of the steering wheel shaft) which is connected to a pair of double-action steering cylinders (fig. 5.22, item 1) mounted on a steering pivot
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(fig. 5.22, item 2) which oscillates a pair of tie rods (fig 5.22, item 3) going to each steering leg. This system is powered by one of the 2
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 oil flow), it is best to always operate the detas-
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seler at full recommended RPM to ensure maximum steering FIG 5.22
responsiveness.
FIG 5.22
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 di2
rectly under the operator’s seat, is the main valve which controls the amount of pressure going to the lift valve. The dump valve is preset at the factory to 2200 psi.
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continued on next page
FIG 5.23
43 OPERATING INFORMATION CONTINUED
