User manual KOMATSU PC20R-8

[. . . ] Operation & Maintenance Manual WEAM000101 PC20R-8 PC27R-8 SERIAL NUMBER HYDRAULIC EXCAVATOR PC20R-8 - F30791 PC27R-8 - F31103 and up and up WARNING Unsafe use of this machine may cause serious injury or death. Operators and maintenance personnel must read this manual before operating or maintaining this machine. This manual should be kept inside the cab for reference and periodically reviewed by all personnel who will come into contact with the machine. FOREWORD 1. 1 FOREWORD · This manual has been carried out by Komatsu Utility in order to supply their customers with all the necessary information on the machine and the safety regulations related to it, together with the use and maintenance instructions that enable the operator to exploit the capacity of the machine with optimal results and to keep the machine efficient over time. · The operation manual, together with the spare parts catalogue, is an integral part of the machine and must accompany it, even when it is resold, until its final disposal. [. . . ] 3 - Shift the safety device lever to the lock position and stop the engine. 4 - Insert a metal or nylon rope in the two holes provided on the blade ends and in the boom hole. Fix the ropes with appropriate locks or safety pins. 5 - Connect the ropes to the upper lifting bar as indicated in the figure. RWA07460 · Always use the three coupling points provided for the lifting operations. 6 - Lift the machine slowly until the ropes are stretched and make sure that the fastenings are correct before lifting the machine definitively. IMPORTANT CAUTION · When lifting the machine, make sure that it is correctly balanced and that it remains in horizontal position during the lifting operations. · Do not lift the machine with swung boom or without using the lifting bar. 101 PRECAUTIONS TO BE TAKEN IN THE COLD SEASON 3. 11 PRECAUTIONS TO BE TAKEN IN THE COLD SEASON During the cold season or in areas where the temperature is particularly low, especially during the night, it is necessary to take some countermeasures meant to limit the damage deriving from low temperatures. 3. 11. 1 FUEL AND LUBRICANTS 1 - Change the fuel and use the winter fuel ASTM D975 N. 2 - Change the engine oil with an oil with suitable viscosity. For the relevant specifications, see "4. 3 FUEL, COOLANT AND LUBRICANTS". 3. 11. 2 COOLANT DANGER · The coolant containing antifreeze is flammable; do not smoke and do not use naked flames during the checks and when preparing the mixture. · Do not use methanol-, ethanol- or propanol-based antifreezes. 1 - If no permanent antifreeze is available, use an antifreeze mixture made of ethylene glycol added to anticorrosion and antifoam products. Use this mixture only during the winter and when changing the coolant (in autumn or spring) wash the cooling circuit (see "4. 7. 1 WHEN REQUIRED"). 2 - When it is necessary to calculate the antifreeze-water ratio, refer to the lowest temperature measured in the past and consider a temperature 10° C lower than that. 3 - Do not use plugging additives, either alone or added to the antifreeze, to eliminate leakages. 4 - Do not mix antifreezes of different brands. 5 - If a permanent antifreeze is used during the year, it is not necessary to change it and to wash the circuit. 6 - The required standards for the permanent antifreeze are SAE-J1034 and FEDERAL STANDARD O-A-548D. In case of doubt regarding the compliance of the antifreeze used with the standards, contact the manufacturer and ask for precise information. 3. 11. 3 BATTERY DANGER · To avoid explosions due to the presence of gas, do not provoke sparks and do not use naked flames near the battery. · The battery electrolyte is dangerous. If it comes in contact with the eyes or the skin, immediately rinse with plenty of water and consult a doctor without delay. 102 PRECAUTIONS TO BE TAKEN IN THE COLD SEASON 1 - When the ambient temperature decreases, the battery capacity decreases accordingly and, if the battery charge is low, the electrolyte may freeze. Keep the battery completely charged and insulate it to protect it against low temperatures, so that the machine can be started without problems the following day. 2 - Measure the specific weight of the fluid and check the battery charge percentage, making reference to the following table: CHARGE PERCENTAGE 100% 90% 80% 75% FLUID TEMPERATURE 20°C 1. 28 1. 26 1. 24 1. 23 0°C 1. 29 1. 27 1. 25 1. 24 -10°C 1. 30 1. 28 1. 26 1. 25 -20°C 1. 31 1. 29 1. 27 1. 26 3 - When the electrolyte level is low, add distilled water before starting work, rather than after work, in order to prevent the fluid from freezing during the night. 3. 11. 4 OTHER PRECAUTIONS 1 - Before using the machine in normal operating conditions, carry out some slow movements either forward and in reverse, and operate all the work equipment cylinders slowly more than once. These operations serve to warm up and fluidize the oil in the hydraulic circuit and the reduction gears. 3. 11. 5 PRECAUTIONS TO BE TAKEN AT THE END OF WORK 1 - Completely remove mud and water from the machine body. Park the machine on firm ground; if the machine must be parked near banks or ditches, park it on wooden boards in order to distribute the weight of the machine on a larger surface. 2 - Be careful to water drops forming on the hydraulic cylinder rods: these drops must be completely removed, since if they freeze the cylinder gaskets may be damaged. [. . . ] 4 - Disconnect the hammer feeding and draining pipes. 5 - Fit the sealing plugs of the rapid couplings. 6 - Disconnect the hammer from the mechanical constraints, as described in "3. 13. 4 CHANGING THE BUCKET". 6. 2. 4 MAINTENANCE The hydraulic system does not require any maintenance operation and inspection other than those prescribed for the machine. For the maintenance operations required for the hammer, see the specific operation manual. 190 ARRANGEMENT FOR THE OPERATION OF OPTIONAL EQUIPMENT 6. 3 ARRANGEMENT FOR THE OPERATION OF OPTIONAL EQUIPMENT 1 The machine is equipped with an independent hydraulic circuit for the operation of optional equipment that can be installed instead of the standard bucket. [. . . ]