John Deere RT5025AJ Operator's Manual

To adjust the depth setting on your John Deere RT5025AJ Tiller, locate the depth adjustment lever on the side of the tiller. Move the lever to the desired depth position. Ensure the tiller is on a level surface and the engine is off before making adjustments.
Use SAE 10W-30 oil for the engine of your John Deere RT5025AJ Tiller. Make sure to check the oil level regularly and change it according to the maintenance schedule in the owner's manual.
Regular maintenance should be performed every 25 hours of operation or at the start of each season. This includes checking and changing the oil, cleaning or replacing the air filter, and inspecting the tines and belts for wear.
If your John Deere RT5025AJ Tiller won't start, check the fuel level and ensure the fuel valve is open. Verify that the spark plug is clean and properly gapped. Check the choke position and inspect the air filter for blockages.
To store the tiller safely, clean it thoroughly to remove dirt and debris. Drain the fuel tank or add a fuel stabilizer. Store it in a dry, sheltered location, and cover it to protect it from dust and moisture.
To replace the tines, ensure the engine is off and the tiller is on a stable surface. Remove the bolts securing the tines and replace them with new ones, ensuring they are securely fastened. Refer to the manual for specific instructions.
For rocky soil, operate at a slower speed and adjust the depth setting to a shallower position. Frequently check the tines for damage and clear any rocks that may block the tiller's path.
Excessive vibration may be due to loose parts or damaged tines. Inspect the tines and bolts for wear and tighten any loose components. If the problem persists, consult your dealer or a professional technician.
To check the drive belt tension, inspect it for wear and ensure it is snug but not overly tight. Adjust the tension by loosening the mounting bolts and sliding the motor to increase or decrease tension, then retighten the bolts.
It is not recommended to use the tiller on overly wet soil as it may cause compaction and clog the tines. Wait until the soil is damp but not saturated for optimal tilling conditions.