Lubricate the machine's brew group frequently so its mechanical parts continue to move easily. Use the HD5061 brew group grease.
Frequency of lubricating:
Brewing 1-5 cups per day, lubricate every 4 months.
Brewing 6-10 cups per day, lubricate every 2 months.
Brewing more than 10 cups per day, lubricate once a month.