Rancilio EGRO 55 Series Technical Manual page 112

6.7 BREW GROUP REBUILD GUIDE
10. REASSEMBLE UPA and LPA INTO BREW GROUP ASSEMBLY
10.1
10.1 Mount lower piston assembly into brew unit housing.
TOOL: 3mm Allen wrench
PLEASE NOTE: the motor goes to the left (when the BGA is facing towards you) and the cotter pins
are inserted from the front of the BGA.
10.2 Mount the upper piston assembly into the brew unit housing.
PLEASE NOTE: motor goes to the left (when the BGA is facing towards you) and the cotter pins
are inserted from the front of the BGA.
If the cotter pins which hold the UPA in place do not easily insert into the frame, manually move the
piston up or down using a 3mm Allen wrench inserted into the UPA gear box.
10.3 Test the pistons by manually by using a 3mm Allen wrench inserted into the gear box of the LPA, to make sure that
they are positioned correctly.
--> TOOL: 3mm Allen wrench
10.2
- Section 6: Page 39 -
EGRO 55 SERIES TECHNICAL MANUAL
10.3