PATTERSON, ROGER L.,BELL, ANDREW W. D.,ENNS, JOHN E.
申请号：
CA2796120
公开号：
CA2796120C
申请日:
2012.11.16
申请国别(地区):
CA
年份:
2014
代理人:
摘要：
A tractor has hydraulically driven wheels at a cab end and castorwheels at an engine end. It can be driven cab forward in a working mode with aheader on the forward end. It is rotated to engine forward in the transportpositionfor more stable higher speed travel. There is provided a float module withadjustableand calibrated springs on the header which allows the header to float relativeto thelift system on the tractor. The float force is adjusted by raising andlowering the liftsystem in dependence on an angle measurement of the lift position. The liftsystemincludes a lift cylinder and tilt cylinder controlled to change cutter anglewhilemaintaining a sight line to the cutter bar for the operator.
