Operation - Section 32 OM3241 Page 32-12 Operator Cab and Controls The operator must understand the function and oper- ation of each instrument and control (Figure 32-10). Control functions are identified with international symbols that the operator must learn to recognize immediately. This knowledge is essential for proper and safe operation. GENERAL INFORMATION This symbol, when it appears on an indicator or control, identifies that this indicator or control is not used. Items that are marked as optional do not apply to every truck. This symbol identifies a rotary control or switch. Rotate the knob clockwise or counterclockwise for functions.
CONTROL SYMBOLS The following symbols are general indicators and may appear in multiple locations and combinations on the instrument panel. This symbol identifies a switch used to test or check a function. Press the switch on the side near the symbol to perform the test. This symbol may be used alone or with another symbol. This symbol identifies the OFF posi- tion of a switch or control. This symbol may be used alone or with another symbol. This sym- bol identifies the ON position of a switch or control. This symbol identifies the pushed in position of a push-pull switch or control. This symbol identifies the pulled out position of a push-pull switch or control.