70242319 New LH Sway Block (Fits CAT. II) Fits Allis Chalmers 170 175 180 185One New Aftermarket Replacement Left Hand Sway Block Fits Allis Chalmers Tractors This left hand (LH) sway block is a Category II 3 point hitch component Fits Allis Chalmers (AC) row crop and utility tractors. The sway block mounts to the tractor's lower hitch linkage and limits lateral movement of implement lower lift arms, keeping rear mounted implements stable during operation and transport. Note: this is the left hand sway block only the right