Curtiss-Wright | EL30 Rev. H PN23942 6/14/16
9
4.0 MAINTENANCE PROCEDURES
4.1 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.
3. Remove the rear tie rod nuts from the back of the actuator.
Extreme care should be taken when removing the tie rod
nuts or tie rods so as not to twist or pull on the end cap
of the actuator. The end cap houses the feedback device.
Alignment of this feedback device to the phases of the motor
is critical to the operation of the system. Some feedback devices
are sensitive to movement of their mounting surface once
installed and can be damaged if care is not taken.
4. If your actuator does not have a front flange, skip this step. Slide
the front flange forward and off the actuator. The tie rods will
remain attached to the front flange.
4.2 Lubrication Maintenance
Grease lubricated units will require periodic inspection and renewal
of the bearing and roller screw grease. The table below shows the
recommended grease renewal period.
RMS
Rotational
speed (RPM)
Recommended Grease Renewal Period hours)
CASE TEMP
65ºC (149ºF)
CASE TEMP
80ºC (176ºF)
CASE TEMP
95ºC (203ºF)
250
10,000
5,000
2,500
500
8,500
4,250
2,125
1000
6,000
3,000
1,500
1500+
3,500
1,750
875
