Rancilio EGRO 55 Series Technical Manual page 82

6.6 PM GUIDE
DESCRIPTION OF PARTS:
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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 9 -
EGRO 55 SERIES TECHNICAL MANUAL
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