MACHINE OPERATIONS AND CONTROLS 5. Extend the boom, arm, and bucket cylinder fully as shown in the diagram on the right, remove the oil filler cap, then install the cap and pressurize the inside of the tank. IMPORTANT Be sure to pressurize the hydraulic tank. If it is not pres- surized, the pump will suck in air, and this will adversely affect the equipment. CHECK DUST INDICATOR 1. Open the engine rear cover. For details, see Section "3.2.9 ENGINE REAR COVER". 2. Check that the red piston has not appeared in the trans- parent portion of dust indicator (1). 3. If the red piston has appeared, clean or replace the ele- ment immediately.
For details of the method of cleaning the element, see "4.9.1.a CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT". 4. After checking, cleaning or replacing the filtering element, press the small piston of the clogging indicator (1) to move it back to its original position. CHECKING AND CLEANING THE FILTERING ELEMENT If red ring (1) of the water separator is at the bottom of case (2), there is no water. If the ring (1) is floating, there is water up to the bottom of the ring, so drain the water as follows. Prepare the filter wrench for fuel filter. 1 - Open the engine rear cover, and set handle to the LOCK position (A). See "3.2.9 ENGINE REAR COVER".
2 - Using the filter wrench, loosen ring (4), then remove case (2) and throw out the water inside it. 3 - Set case (2) in position, then tighten ring (4) to install it. 4 - Shift the small lever (3) to the opening position (B). 5 - Drain any water or sediment from the fuel tank. For detai- ls, see "4.9.1.e DRAIN WATER AND SEDIMENT FROM FUEL TANK". 96