La Marzocco LINEA MINI Manual Del Usuario página 12

8) Adjusting water pump pressure.
The water pump is factory set at 9 bar
pressure. If it becomes necessary to
change the pressure please use the
following procedure:
1. Remove the top tray and the lower tray.
2. Locate the water pump adjustment
screw and loosen the lock nut.
12
3. Adjust the water pump pressure to the
desired measurement.
4. Rotate clockwise to increase pressure
and counter-clockwise to
pressure.
NOTE:
The water pump pressure should be
adjusted when the machine is operating
and coffee is present in the portafilter.
reduce
Adjustment
Lock nut
screw
Figure 3 - Water Pump Pressure Adjustment