12. OPERATION CHECK DUST INDICATOR 1. Check that the red piston has not appeared in the trans- parent portion of dust indicator 0. 2. If the red piston has appeared, clean or replace the ele- ment immediately. For details of the method of cleaning the element, see “24.2 WHEN REQUIRED”. 3. After checking, cleaning, and replacing, press the knob of dust indicator 0 to return the red piston to its original po- sition. CHECK THAT LAMPS LIGHT UP Turn the head lamp switch, the rear lamp switch and the working lamp to the ON position and check that the head lamps, rear lamps and the working lamp light up.
If the lamps do not light up, there is probably a broken bulb or disconnection in the wiring, so contact your Komatsu dis- tributor for repairs. CHECK HORN SOUND CHECK BACKUP ALARM SOUND CHECK SEAT BELT FOR WEAR OR DAMAGE Check the belt and mounting clamps, and if they are worn or damaged, replace the seat belt. CHECK FOR WATER AND SEDIMENT IN WATER SEPARATOR, DRAIN WATER The water separator separates water mixed in the fuel. If float 0 is at or above red line 0, drain the water according to the following procedure: 1. Loosen drain plug 0 and drain the accumulated water until the float reaches the bottom. Tighten drain plug 0. / l,,,oF 2. 3.
If the air is sucked into fuel line when draining and water, be sure to bleed air in the same manner as for the fuel filter. See “24.5 EVERY 500 HOURS SERVICE”. 2-40