Rancilio EGRO 55 Series Technical Manual page 109

7. REASSEMBLE THE LOWER PISTON ASSEMBLY (LPA)
7.1
7.1 Lubricate lower piston groove
LUBE: Viper lube Loctite PN 36781
7.2 Replace lower piston O-ring
PN: 029441 (small orange seal)
7.3 Reassemble brew screen onto lower piston
TOOL: Screwdriver
7.4 Reattach piston shaft to piston head using Allen screws
TOOL: 3mm Allen wrench
! !
CAUTION: Do not overtighten or cross thread
7.5 Reattach piston sensing arm to gear box using short screws
TOOL: Phillip's headed screwdriver
7.6
7.6 Attach gear box to the mounting block using 4mm Allen Screws
TOOL: 4mm Allen wrench
7.7 Attach piston spring plate to LPA using 4mm Allen Screws
TOO: 4mm Allen wrench
© Copyright 2008. Rancilio North America
EGRO 55 SERIES TECHNICAL MANUAL
7.4
7.7
7.5
E55_TM_S6_Adjustment_Maintenance V3