If you have a Billy Goat Leaf vacuum, chances are you will need to change the oil at some point. Here is how you can do it:
1. First, make sure that the leaf vacuum is turned off and unplugged.
2. Next, locate the oil plug on the side of the unit.
3. Using a wrench, loosen the oil plug and let the old oil drain into a container.
4. Once all of the old oil has drained out, replace the oil plug and tighten it securely with the wrench.
5. Finally, add new oil to the leaf vacuum until it reaches the full line on the dipstick (usually about 1 quart). Be careful not to overfill!