MACHINE OPERATIONS AND CONTROLS OPERATION Check Oil Level in Hydraulic Tank, Add Oil When removing the oil filler cap, oil may spurt out, so turn the cap slowly to release the internal pressure before removing the cap. 1. If the work equipment is not in the condition shown in the diagram on the right, start the engine, run the engine at low speed, retract the arm and bucket cylinder rods fully, then lower the boom, set the bucket teeth in contact with the ground, and stop the engine. 2. Within 15 seconds after stopping the engine, move each control lever (for work equipment and travel) to the full stroke in all directions to release the internal pressure. 3.
Check sight gauge (G) from the right window installed to the operator's compartment. The oil level should be between the H and L lines. NOTICE Do not add oil above the H line. This will damage the hydraulic circuit or cause the oil to spurt out. If oil has been added to above the H level, stop the engine and wait for the hydraulic oil to cool down, then drain the excess oil from drain plug (P). 4. If the oil level is below the L line, add oil through oil filler (F) at the top of the hydraulic tank. REMARK The oil level will vary depending upon the oil temperature. Accordingly, use the following as a guide: Before starting operation:
Between H and L levels (Oil temperature 10 to 30°C) Normal operation: around H level (Oil temperature 50 to 80°C) Check Working Lamp Switch Turn the lamp switch to the ON position and check that 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 distributor for repairs. 3-62 WARNING