TS 9916

TS 9916 is a standard on the symbols used for operator controls and for other controls on earth-moving and construction machinery. In practical terms, it addresses the graphic signs that identify the function of buttons, levers, switches, and similar control devices so that machine operation can be understood consistently, even without relying on text labels.

The scope covers symbols for direct operator controls as well as other control elements that are not operated in the same way as the main driving controls. From a general technical perspective, this subject concerns the visual representation of basic control functions such as movement, direction, start-stop actions, position changes, and selection of operating modes. In heavy machinery, a consistent symbol language supports quicker recognition, reduces the chance of operator error, and helps align different manufacturers around a common interface vocabulary.

Why control symbols matter on earth-moving equipment

Construction and excavation machines often work in harsh environments where vibration, dirt, low visibility, and varied operator experience make clear marking especially important. Symbols provide a compact and language-independent way to communicate control intent, which is often more practical than text alone on compact dashboards and control panels. TS 9916 therefore serves as a vocabulary standard for the visual language used on these machines.

This document is listed as equivalent to ISO 6405:1982. It should be understood as covering the symbol system used on this equipment category; it does not, by itself, state which controls a particular machine must have or define the machine’s design performance requirements.