Loading capacity is increased, stability and reliability are enhanced. A hot air reflow isolating device, optimal thermal dissipation duct, and an aluminium plate-fin type radiator improve cooling efficiency and ensure engine reliability. An automotive-type oil filling cap and an optimally designed oil filling channel structure enhance the truck’s overall safety. A constant displacement pump load sensing steering system boosts lifting speed and lowers hydraulic oil temperature. The optimal design of critical components such as the frame, mast, overhead guard, and steering axle enhances the truck’s safety and reliability. Repositioning the truck’s centre of gravity improves loading capacity, stability, and safety.