How is a load chart used in wheel loader operation?

• A. To schedule maintenance
• B. To set engine idle speed
• C. To measure fuel consumption
• D. To determine safe load limits at given lift heights, dump angles, and ballast configurations

Answer: (D)

A wheel loader’s load chart shows the maximum safe payload for a given lift height and dump angle, taking ballast into account. As you raise the bucket or change the angle at which you dump, the machine’s stability changes, so the allowable load varies. The chart maps these values so you can read the safe load for the current lift height and dump angle, given the ballast configuration and any attachments.

To use it, locate the current lift height and the corresponding dump angle, then read the safe load limit from the chart. Compare your actual load to that limit; if you’re over it, lower the lift, adjust ballast, or reconsider the configuration to stay within safe bounds. This helps prevent tipping or hydraulic overload and keeps operation under safe stability limits.

Other options like maintenance scheduling, idle speed, or fuel consumption aren’t determined by the load chart.