To use the CAT336E - 65FT excavator, first make sure it's on a stable surface. Start the engine following the normal startup procedures. When operating, use the controls gently to move the bucket and arm. Don't overload the bucket beyond its 0.85 capacity. Always check the machine before starting work, including looking for any visible damage. For maintenance, regularly change the oil and filters as recommended. Keep the machine clean, especially the high - wear parts where premium materials are used. If you notice any unusual noises or vibrations, stop using the machine and have it checked by a professional.