11. EXPLANATION OF COMPONENTS 11.14 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 lever in the LOCK position. 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. 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 dia- gram on the right. 11.14.1 METHOD OF RELEASING PRESSURE IN OPERATING CIRCUIT ON MACHINE EQUIPPED WITH ACCUMULATOR 1.
Lower the work equipment and stop the engine. 2. After stopping the engine, operate the control lever fully to the front, rear, left, and right to release the pressure inside the work equipment circuit. However, the pressure cannot be completely removed, so when removing the work equipment circuit, loosen the screw slowly, and never stand in the direction where the oil spurts out. 2-29