Rancilio EGRO 55 Series Technical Manual page 104

6.7 BREW GROUP REBUILD GUIDE
5. REASSEMBLE THE UPPER PISTON ASSEMBLY (UPA)
5.1
5.1 Lubricate upper piston groove
LUBE: Viper lube Loctite PN 36781
5.2 Replace the upper piston scrapper ring and O-ring
PN: ?????? and 039064
5.3 Reassemble the shower screen and stainless steel upper piston plate onto upper piston
TOOL: Phillip's head screwdriver
! !
CAUTION: Do not over tighten or cross thread
5.4 Replace stainless steel piston stabilizer ring onto piston head
5.5
5.5 Reassemble piston shaft to piston head using Allen screws
TOOL: 3mm Allen wrench
CAUTION: Do not overtighten or cross thread
5.6 Reinsert brass pins into piston shaft
5.7 Reattach piston shaft guides onto the sides of the piston shaft
PLEASE NOTE: Bearings should face upwards, or away from the piston head
TIP: Tighten Allen screws half-way and lay on the edge of the table or fl at surface
and tighten the rest of the way
5.3
5.6
- Section 6: Page 31 -
EGRO 55 SERIES TECHNICAL MANUAL
5.4
5.7