RowCrop special models require front steering axle to be locked out.
Bearcat III Bearcat IV:
PT-225,ST-220, ST-225, CM-225, KM-225.
Cougar III Cougar IV:
PT-250, PT-270, PTA-251, PTA-270, PTA-280.
ST-250, ST-251, ST-270, ST-280.
CM-250, CM-280.
KM-250, KM-280.
Panther III Panther IV:
PT-350, PTA-296, PTA-297, PTA-310, PTA-325.
ST-310, ST-320, ST-325, ST-350.
CM-325, CM-360.
KM-325, KM-360.