. SAFETY PRECAUTIONS FOR OPERATION 2 - 20 PRECAUTIONS IN COLD AREAS Carry o ut the warming-up operation t horoughly. If the machine is not thoroughly warmed levers a re operated , the reaction of th e machine will be slow, and this may lead t o unexpected accidents. If the ba ttery electrolyte is frozen, do not c harg e the battery or start the engine with a different There is a hazard t hat this will ignite t he battery and cause the batter y to explode Before charging or starting the engine with a different power source, melt the battery electrolyte and check that there is no leakage of electrolyte befo re starting. up before the control