COMPONENT OPERATION ／ HST Pump <When bypassed > When the force generated by the low pressure circuit [A] plus the spring force (3) becomes smaller than the force generated by the charging circuit [B], the valve sheet (8) is pressed up to the position shown in the figure and the oil in the charging circuit [B] will be drawn into the low pressure circuit [A].
<When towing (engine stops)> The poppet (7) is pressed down to the position shown in the figure by tightening the rod (1), the oil in the high pressure circuit [A] will be drawn into the charging circuit [B].
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