Packing/Seals - Bertolini LIGHT DUTY Serie Manual Del Usuario

2. Insert the valves in their housings; be careful that the valve position is perpendicular to the bot-
tom of its housing.
3. Reassemble the valve caps for the pump C40 and the valves covers for the other pumps mod-
els.
For the pump C40 tighten the valve caps to 70Nm torque.
For the other pumps tighten the valves covers screws to:
40 Nm torque (screws M10 for PUMPS C53.2-C75)
70 Nm torque (screws M12 for PUMPS CK SERIES)
110 Nm torque (screws M14 for PUMPS C SERIES)

8.3 Packing/Seals

Picture 7
Disassembly
1. Using a 8mm Allen wrench (PUMP C53.2); 10mm Allen wrench (PUMPS C40-C75-C-CK series)
remove the head bolts then take out the head using a plastic hammer (pictures 7 and 8)
2. Extract the packing assemblies using a proper packing extractor reported (see chart page 25
Pump head
Thrust
ring
Front
seal
Antiextrusion
ring
Thrust ring
Back seal
Picture 8
Front gland
O-ring
Picture 10
54
Picture 9
Rear gland