36
February 2022
Installation, Operation and Maintenance Manual
MAN 607 Rev. 6
Section 5: Maintenance
Maintenance
5.2.2
Replacement of Seals for Actuators with Biffi
Manual Handpump
(See following parts list for maintenance)
If there are leaks in the hydraulic cylinder or a malfunction in the mechanical components,
or in case of scheduled preventive maintenance, the actuator must be disassembled
and seals must be replaced with reference to the sectional drawing and adopting the
following procedures:
1.
Remove the nuts (item 16) and the washers (item 15) from the tie rods (item 10)
at the end flange (item 13) side.
2.
Slide off the end flange and the tube (item 12).
3.
Remove the screws (item 2) and the cover (item 1).
4.
Unscrew the piston rod (item 6) threaded end from the adaptor bush
(item 30) of guide block (item 14).
5.
Slide off the piston rod from the head flange (item 2).
6.
Disassemble the head flange from the mechanism housing (item 8) by removing
the screws (item 7) only if the gasket (item 36) has to be replaced because
of damage.
