Answer
From the manual: look at the engine oil every day and change it every month, and clean the air filter once a week. Once a week, spray the moving parts with a light aerosol lubricant such as WD-40. Once a year, take the cast cap off the dump gear assembly and fill it with grease. Repack the wheel bearings every 6 to 12 months, depending on how much the machine is towed. Check the mounting hardware monthly and set the tires to 50 PSI before towing. For any cleaning or service, shut off the engine and pull the spark plug wire (or unplug an electric model), and leave the guards on.
Source
Reviewed by our parts specialists from IMER manuals and parts books. Check the part number on your machine or in its parts book before you order. Not sure? Ask a parts specialist.