Check engine oil and oil level everyday before operation
1. When checking engine oil, the machine shall be stopped and be placed on a horizontal plane. 
2. Loosen engine oil dipstick and wipe it clean. 
3. Insert engine oil dipstick into oil filler opening, but do not tighten it up. 
4.Check whether the oil level is between the upper scale and lower scale. If the engine oil level is too low, engine oil shall be filled to required oil level. 
5. Re-insert the oil dipstick and tighten it.