When checking front-end alignment on a truck, which angles need to be summed up?

When checking front-end alignment on a truck, the correct summation of angles involves kingpin inclination and camber. Kingpin inclination is the angle formed between the vertical line and the kingpin axis when viewed from the front of the vehicle. This angle affects the steering characteristics and stability of the vehicle. Camber, on the other hand, is the angle of the wheels in relation to the vertical axis when viewed from the front; it is important for tire wear and handling characteristics.

By summing these two angles—kingpin inclination and camber—you can assess how they interact to influence the vehicle's alignment and overall steering performance. This is especially relevant as both angles play critical roles in maintaining proper wheel alignment, which is vital for safe and efficient vehicle operation.

Understanding this combination helps technicians diagnose alignment issues correctly and take the necessary corrective measures to ensure that the front-end alignment is optimal for the specific truck model being serviced. This is crucial for improving handling, tire life, and overall safety.