How to Adjust the Height of Shacman Truck Headlights?
2 Answers
Whether adjusting the button in the cab or using a hex wrench to adjust the nuts on the headlight assembly, it must be done against a wall. First, choose a flat surface, park the vehicle about five meters away from the wall, ensuring the body is perpendicular to the wall. Check if both sides are at the same height—the right side can be slightly higher than the left. Use a hex wrench to adjust the right-side nut on the headlight assembly. Once both headlights are at the same height, the next step is to adjust the headlight projection distance by simultaneously adjusting the height of both headlight assemblies. Drive the vehicle to a flat, open area and measure a distance of 30 meters. The cutoff line of the low beam should ideally reach this 30-meter mark.
Having driven trucks for half my life and operated the Shacman truck model for several years, adjusting headlight height is a piece of cake for me. Generally, you need to open the engine hood first and locate the two adjustment screw holes at the back of the headlights: one controls the vertical angle, and the other adjusts the horizontal alignment. Insert a Phillips screwdriver or a small hex wrench, turning clockwise to raise the beam and counterclockwise to lower it. It's best to perform the adjustment at night or in a dark environment, with the headlights on and facing a flat wall about five meters away. The center of the light spot should ideally land 10 to 15 centimeters below the height of the headlights—this ensures adequate road illumination without blinding oncoming drivers. Once, I didn’t adjust them properly on the highway, and the beams were too high, nearly causing an accident by dazzling another truck driver. Remember, truck headlight adjustment directly impacts visibility and safety; incorrect settings not only risk fines for violating regulations but also pose serious hazards. Before making any adjustments, always check that the bulbs are functioning properly to avoid wasted effort.
