April 2022
Installation, Operation and Maintenance Manual
E-90090007 Rev. 0
21
Section 7: Maintenance
Maintenance
3.
Mark the end stop (32) engaged position on top of end cap (8).
A.
For FS Type Operator:
NOTE:
Operator is under spring load. Remove the end stop completely to reduce the spring load
during disassembly to avoid injury.
Do not rotate/remove end stop (32) under spring load. Move piston away prior to removal.
a.
Apply pressure to end cap (8) ports to move drive rod (1) away from the
end stop (32).
b.
Remove the end stop cover (33) and end stop cover seal (57) with the
piston held in position.
NOTE:
Remember to mark the end stop (32) with the current engaged position in order to aid
in reassembly.
!
CAUTION
Remove the end stop cover carefully (33). Pressurized fluid may escape between the
threads in the end stop (32) and the end cap (8).
c.
Unscrew the end stop (32) slowly while end cap (8) ports are still pressurized.
!
CAUTION
Do not remove the end stop (32) completely. Pressurized fluid may escape between the
threads in the end stop (32) and the end cap (8).
NOTE:
Unscrew the end stop in stages (approximately 4 to 5 turns in first trial, then reduce the
number of turns to 2 to 3 if more steps are needed), then remove the pressure in the end
cap to verify if spring force is still acting against the end stop (32). Repeat step c until end
stop (32) is free from spring load.
d.
Make sure pressurized fluid is completely released from the unit before
proceeding to next step (that is step 4).
