Curtiss-Wright | Tritex II AC 90, 115 Rev. X PN39892 7/12/22
MAINTENANCE PROCEDURES FOR RE-GREASING
Maintenance Procedure for Roller Screw Re-Greasing
If your actuator has a preloaded roller screw, do not
remove it from the cylinder. Preloaded screws require
special tooling and procedures for proper disassembly and
reassembly. Contact Exlar to arrange for maintenance of a
preloaded screw actuator.
Disassembly
Refer to the exploded view on the following page.
1.) Remove the actuator assembly from the machine by
disconnecting the cables, main rod coupling and actuator
mounting bolts or fasteners.
2.) If your unit does not have an external anti rotate assembly, skip
this step. Loosen the two machine screws that clamp the anti-
rotate cross member to the actuator output rod. Slide the anti-
rotate mechanism forward and off the actuator.
The end cap houses the Tritex drive and control. Extreme
care should be taken when removing the tie rod nuts or tie
rods so as not to twist or pull on the drive section of the actuator.
Do not disconnect the wiring between the drive and the actuator.
3.) Remove the screws holding the seal gland to the face plate. With
the screws removed, pull the seal gland off. Pry spots are
located on each side of the gland to aid in removal.
4.) When the seal gland is removed, the open end of the roller
screw internally threaded cylinder (ITC) is visible. The roller
screw can be removed by turning it counter clockwise and
threading it out of the cylinder. It may be necessary to keep the
roller screw cylinder from turning to remove the screw.
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