30. REVO TACHOGRAPH (TCO 15-7) 21. VOLTAGE INDICATION LABEL 22. RPM RECORDING STYLUS This records the momentary engine speed on the chart. 23. ADJUSTMENT SCREW FOR RPM WARNING LAMP The speed at which the lamp gives a warning can be set as desired. 24. SPEED CONFIRMATION APERTURE FOR RPM WARNING LAMP INDICATION This is the speed indication aperture for setting the desired speed of revolution. 25. TOTAL REVOLUTION COUNTER This indicates the total number of revolutions (x1000) of the engine. 5-23