Exlar Curtiss-Wright Tritex TTX Series, Installation & Service Instructions Manual

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32 | Tritex
®
TTX Series DC Actuator Installation & Maintenance Instructions Curtiss-Wright | Rev D | PN75667 | 8/1/22
If the roller screw does not turn freely, remove it and begin
again. When the screw is properly threaded into the cylinder,
it will roll freely into the actuator.
NOTE : When the roller
screw reaches the portion of the cylinder that contains the
motor magnets, it will be more difficult to turn because of the
magnetic field of the magnets. THIS IS NORMAL. Continue
to thread the roller screw into the cylinder until it reaches
the bottom (it will become difficult to turn and the motor and
bearings will begin to rotate with it).
6. Place a small amount of seal lubricant on the inside surface
of the seal/bushing assembly.
7. Carefully slide the faceplate over the actuator rod end while
guiding the four cap screws through their respective holes
in the rear end cap of the actuator. Ensure the faceplate
seats completely and squarely on the front of the actuator.
NOTE : The seal is a tight fit on the rod end. Use caution to
avoid damaging the seal on the threads of the extending
rod. The inner surface of the faceplate provides the pre-
loading for the bearings, so it is important that it be properly
seated. Torque the four cap screws of the faceplate
assembly to 12.2 Nm (9 ft-lb).
8. For actuators equipped with an external anti-rotate
mechanism and/or limit switch assembly, slide the rod of the
anti-rotate mechanism rod into the guide bushing. Tighten
the two screws used to hold the anti-rotate assembly or the
four screws used by the limit switch assembly to clamp that
assembly to the actuator rod.
Figure 33 - Grease renewal reference
7.2 SEAL MAINTENANCE
Exlar recommends that the faceplate assembly containing the
main rod seal and bushing assembly be replaced during the
re-lubricating procedure. To have this service performed for you,
contact the Exlar Returns Department to send your unit in for
service (see Section 9.0, “Product Returns”). If any additional
maintenance or repair is needed, consult Exlar. It may be
necessary to return the actuator to the factory for refurbishment.
7.3 REPLACEMENT FACEPLATE ASSEMBLY KIT
Faceplate Model Part Number Parts Included
TTX060
TTX080
PN 77565
PN 71457
Faceplate, O-ring, bushing,
seal, wiper, and fasteners
Faceplate Assembly Kit
TTX060: 5 mm Hex; 18 mm long; Torque: 4.6 Nm
TTX080: 6 mm Hex; 25 mm long; Torque 12.2 Nm
Roller Screw
TTX080 Shown as example