burnies;
This truck has the hydraulic control lever automatically increases the engine speed with the demand for faster lift speed. Does its engine sound like it is in labor? When the valve body was inspected did the relief valve appear ok? Does the oil appear foamy? How does the velocity control valve in the lift cylinder base appear? Were the suction filters changed? Could the pump have lost its prime? Could the lift's pump have too much internal leakage? The lift cylinder is a ram type which eliminates it as a fault of internal leakage. The oil, is it of proper viscosity?