. SAFETY SAFETY MACHINE OPERATION STARTING ENGINE IN COLD WEATHER 2 - 23 Carry o ut the warming-up operation t horoughly. If the machine is not thoroughly warmed up before the control levers a re operated , the reaction of th e machine will be slow, and this may lead t o unexpected accidents. If the b attery 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.