38
February 2022
Installation, Operation and Maintenance Manual
MAN 607 Rev. 6
Section 5: Maintenance
Maintenance
Reassemble
1.
Assemble the new gasket (item 36) after cleaning the surfaces of housing (item 8)
and head flange (item 2) which are in contact.
2.
Assemble the head flange and tighten the screws (item 7) to the
recommended torque.
3.
Clean and lubricate the piston rod (item 6) surface, particularly that of the bevel,
with a protective oil or grease film and introduce it into the head flange hole,
taking care not to damage the Teflon seal ring (item 4); the piston rod bevel has to
enlarge smoothly the seal ring.
4.
Carefully clean the threaded end of the piston rod and the threaded hole of the
adaptor bush (item 30) of guide block (item 14). Spread some sealant LOCTITE
452, or equivalent, on the rod threaded end and screw it into the adaptor bush
threaded hole and then tighten.
5.
Carefully clean the inside of the tube (item 12) and check that the entire surface,
particularly that of the bevels, is not damaged. Lubricate the tube inside surface
and the bevels at the ends with protective oil or a grease film. Slide the tube onto
the piston taking care not to damage the dual-seal ring (item 9); the tube bevel
has to smoothly compress the seal ring.
6.
Take care also not to damage the head flange O-ring (item 3).
7.
Assemble the end flange (item 13) by centering it on the inside diameter of the
tube, taking care not to damage the O-ring (item 3).
8.
Assemble the washers (item 15) and the nuts (item 16) onto the tie rods
(item 10). Tighten the nuts to the recommended torque, alternating between
opposite corners.
9.
Restore a generous coating of grease on the contact surfaces of the yoke
(item 11) and the bushings (item 13), on the yoke grooves, on the sliding blocks
(item 5), on guide bar (item 9).
10.
Assemble the new gasket (item 36) after cleaning the surfaces of the housing
(item 8) and cover (item 1).
11.
Lubricate the O-ring with protective oil or grease (item 32).
12.
Assemble the cover (item 1) and the screws (item 2). Tighten the screws to the
recommended torque.
NOTICE
After maintenance operations, carry out a few actuator operations to check that its
movement is regular and that there is no oil leakage through the seals.