Function & Applications Tri-lateral head unit is an unique attachment that can put the forks on either front, left or right side while loading.It is between the forks and fork carriage,swing 180 degree and side shifting via 2 units of hydraulic circuit.It can reach the goods from the side without turning around,realizing reload and stack goods in the narrow aisle. Achieved 180°side shifting by two sets oil circuit drive system. Upper arm-slide bearing used idler wheel slideway to ensure high coefficient of stability. Regenerative hydraulic valving for optimal side shifting speed. Chain drive system ensure the stable side shifting.