11. EXPLANATION OF COMPONENTS 11.19 HANDLING ACCUMULATOR ¤ WARNING On machines equipped with an accumulator, for a short time after the engine is stopped, if the work equipment control lever is moved to the LOWER position, the work equipment will move down under its own weight. After stopping the engine, always place the safety lock lever in the LOCK position and lock the attachment control pedal with the lock pin. The accumulator is filled with high-pressure nitrogen gas, and it is extremely dangerous if it is handled in the wrong way. Always observe the following precautions. Never make any hole in the accumulator or expose it to flame or fire. Do not weld any boss to the accumulator.
When disposing of the accumulator, it is necessary to release the gas from the accumulator, so please contact your Komatsu distributor. This machine is equipped with the accumulator in the control circuit. The accumulator is a device to store the pressure in the control circuit, and when it is installed, the control circuit can be operated for a short time even after the engine is stopped. Therefore, if the control lever is moved in the direction to lower the work equipment, it is possible for the work equipment to move under its own weight. The accumulator is installed to the position shown in the diagram on the right.
AM090140 11.19.1 METHOD OF RELEASING PRESSURE IN CONTROL CIRCUIT ON MACHINE EQUIPPED WITH ACCUMULATOR 1. Place the work equipment on the ground. Close the crusher attachment jaws, etc. 2. Stop the engine. 3. Move the safety lock lever to the free position. Move the work equipment control lever and the attachment control pedal to full stroke back and forth, right and left so as to release the pressure in the control circuit. 4. Move the safety lock lever to the lock position. Lock the control lever and attachment control pedal. The pressure, however, will not be completely released, so when the accumulator is re- moved in the control circuit, gradually loosen the screws.
Never stand in the oil ejection direction. 2-40