This standard specifies methods for measuring the traction force of self-propelled earthmoving machines, loaded or unloaded, with the implement attached or towed. Generally, traction force, traction output, and wheel or crawler slip rate are measured with respect to travel speed.
JIS A 8309:1993 history
1993JIS A 8309:1993 Earth-moving machinery -- Method of test for the measurement of drawbar pull