1. Park the lawn mower on a level surface and turn off the engine. Allow it to cool down.
2. Engage the parking brake.
3. Locate the drive belt cover. It is usually on the right side of the lawn mower, near the rear wheel.
4. Remove the cover by removing the bolts or screws that hold it in place.
5. Locate the drive belt. It is a long, flat belt that runs from the engine to the transmission.
6. Loosen the tension on the drive belt by turning the tensioner pulley counterclockwise.
7. Remove the old drive belt by slipping it off the pulleys.
8. Install the new drive belt by slipping it onto the pulleys.
9. Tighten the tension on the drive belt by turning the tensioner pulley clockwise.
10. Reinstall the drive belt cover.
11. Start the engine and test the lawn mower to ensure that the drive belt is working properly.
Here are some additional tips for changing the drive belt on a John Deere LT 190:
* Make sure that the new drive belt is the correct size and type for your lawn mower.
* If the drive belt is too loose, it will slip and cause the lawn mower to lose power.
* If the drive belt is too tight, it will put excessive strain on the engine and transmission.
* If you are unsure about how to change the drive belt on your lawn mower, consult your lawn mower's owner's manual or contact a qualified mechanic.
