Rancilio EGRO 55 Series Technical Manual page 98

6.7 BREW GROUP REBUILD GUIDE
DESCRIPTION OF PARTS:
3
1
Brew Group Assembly or BGA: the
complete brewing module of the Egro 55
series espresso machines.
1. Grounds slide
2. Grounds puck slide
3. Upper Piston Assembly or UPA
4. Lower Piston Assembly or LPA (not pictured)
5. Auger shaft
6. Piston spring plate
7. Piston sensing arm
8. Piston motor
9. Gear box
10. Mounting plate
11. Grounds puck sweeper arm
2
4
5
Piston Assembly, UPA or LPA: The upper and lower
piston assemblies are identical except for the actual
pistons.
View of the Bottom of the Mounting Plate:
you can access the gear box through the hole in the
bottom of the mounting plate. This way you can
manually control the piston.
11
Upper Piston Assembly: the upper piston
assembly has a sweeper arm attached to it.
- Section 6: Page 25 -
EGRO 55 SERIES TECHNICAL MANUAL
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