Yamaha YM-4900A Owner's Manual - Page 3

Caution Injury or handicaps to persons caused by the disregard of warnings with this mark or, misuse of the instrument, may result in the loss of personal property. Please change cracked tone bars as soon as possible. Cracked tone bars have sharp edges that can cut hands. If the instrument is often moved, bolts, parts, etc., may become loose. After moving the instrument, check and make sure all bolts, parts, etc., are firmly fastened. Firmly tighten all loose items. Do not use the hammer for anything other than playing the instrument. It may be the cause of injury or accidents. Do not let children strike other, etc., with the mallet. Do not allow such dangerous behavior to take place. When assembling, be careful not to pinch your fingers or hands. Take special care when assembling rails and resonator pipes. Two persons should carry out this part of the assembly, double-checking as the assembly proceeds. PRECAUTIONS FOR HANDLING GAS SPRING Please observe the following instructions for proper handling of the gas spring. 1. Precautions for handling the gas spring Caution This gas spring requires no oil supply to its sliding section. Additional oil will reduce the sealing durability and cause the oil to leak. Never apply any impact to the gas spring. It will cause oil leakage, malfunction or breakage. Never disassemble the gas spring. As a high pressure gas is sealed in it, disassembling it will cause a high risk. Note that there is not much rigidity in the bending direction. Depending on accuracy in its installation, the bending load will cause the rod to bend, resulting in malfunction. Note that a nick on the piston rod or cylinder will shorten the service life of the sealing or cause a malfunction. Do not expose the gas spring to an excessively high or low temperature. The allowable temperature range for use is -20°C to 80°C. Avoid using the instrument where it is exposed to to rain, water or much dust. Do not apply an excessive force to lift the frame end and pull off the gas spring from the leg. ● Do not apply a high tensile load to the gas spring as it will cause damage to the gas spring. ● In the event of a failure, stop using the instrument and contact the shop of its purchase. If your dealer is unable to assist you, please contact Yamaha directly. 2. Instructions for discarding the gas Danger Make sure to observe the following instructions when discarding the gas spring. As pressurized nitrogen gas is sealed in the gas spring, be sure to release before discarding it. Or an explosion may occur, causing an injury. [PRECAUTIONS] A. Do not crash. B. Do not cut. C. Do not make a hole anywhere other than the specified positions (q and w in the Fig.1). D. Do not throw it in the fire. Fig. 1 15mm q Drill Plastic bag w 35mm [Discarding procedure] 1. Put the gas spring in a plastic bag. Using a drill of 2 to 3 mm, make a hole q from outside of the plastic bag at the position as specified in the figure to release the gas and oil and then make a hole w at the position as specified. (Be sure to make holes in the order of q and w. ) * Drill 2 holes as shown above to release the gas before discarding the gas spring. 2. If a vinyl bag is not used, the oil and drill chips will spread. (In such a case, wear eye protection glasses. ) 19