72
01-2018 5035 01
MAINTAINING THE BREWING
UNIT
z4000 Esfb
After 10 000 dispensed items or every 6
months, the brewing unit requires a small
amount of maintenance work in order to
optimise how it works over time.
To perform the maintenance work, the
brewing unit needs to be removed:
1. Disconnect the espresso coffee outlet
nozzle from the unit by rotating it 90°
away from the connecting rod and pulling
it outwards.
2. Disconnect the fresh brew coffee outlet
nozzle from the unit by rotating it 90° and
pulling it out.
3. Turn the unit end stop lever, rotating it un-
til it is in a horizontal position.
4. Remove the brewing unit.
.
1
2
3
4
5
6
7
8
9
Fig. 45
1. Fresh Brew nozzle
2. Key
3. Lateral screw
4. Espresso nozzle
5. Upper piston
6. Upper piston seal
7. Upper filter
8. Connecting rod
9. Lower scraper
1
2
3
4
6
7
8
9
5
11
10
Fig. 46
1. Upper scraper
2. Espresso nozzle
3. Fresh Brew nozzle
4. Upper piston
5. Upper piston seal
6. Upper filter
7. Lower filter
8. Lower scraper
9. Lower piston seal
10. Lower piston spring
11. Piston rod
