How do you change pump oil in a troy bilt pressure washer model 020207?

To change the pump oil in a Troy-Bilt pressure washer model 020207, first, ensure the machine is turned off and disconnect the spark plug wire for safety. Locate the pump oil fill cap and remove it, then drain the old oil by tilting the pressure washer slightly to allow the oil to flow out. Once drained, refill the pump with new oil until it reaches the appropriate level, then securely replace the oil fill cap. Finally, reconnect the spark plug wire before using the pressure washer again.