... truss. The photos above are 15hp or 18hp walking tractor. These two types have the same chassises, just their ... -12Theoretical Speed(km/h)Forward:1.4,2.5,4.1,5.3,9.4,15.3Reverse:1.0,3.8Rated ... Type0# in summer,-10# or 20# in winterCooling TypeEvaporationRear-Wheel Diameter(mm)340 MODEL:181 (18HP) Engine PatternVertical, One ... -12Theoretical Speed(km/h)Forward:1.4,2.5,4.1,5.3,9.4,15.3Reverse:1.0,3.8Rated ...