Curtiss-Wright | GSM Series Rev. U PN29959 3/28/17
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2.) Place a small amount of seal lubricant on the inside surface of
the seal/bushing assembly.
3.) Carefully slide the face plate and bushing/seal assembly over the
actuator rod end, while guiding the tie rods through the holes in
the rear end cap of the actuator. The seal is a tight fit on the rod
end. Take care not to damage the seal on the threads of the
extending rod. Standard GSM Series rods have a chamfer to
provide a lead in for replacement of the seal and bushing. Be
sure that the faceplate seats completely and squarely on the
front of the actuator. The inner surface of the faceplate provides
the pre-loading for the bearings, and it is important that it is
properly seated.
Units with a Front Flange
Replace the faceplate as described above. Remount front flange by
sliding tie rods through the holes in the faceplate and through the holes
in the rear end cap. Pilot the flange on the pilot diameter located on the
front of the faceplate.
4.) Replace the rear tie rod washers and nuts and tighten to the
proper torque. Tighten the nuts simultaneously by partially
tightening each in an opposing corner pattern until each is
torqued to the rated value shown below.
GSM20:
30 lbf-in (2.5 lbf-ft, 3.39 N-m)
GSM30:
90 lbf-in (7.5 lbf-ft, 10.16 N-m)
GSM40:
240 lbf-in (20 lbf-ft, 27.12 N-m)
5.) If your actuator has an external anti-rotate mechanism, slide the
rod or rods of the anti-rotate mechanism through the front flange
and into the guide bushing or bushings mounted to the rear of
the flange. Position the extending rod so that the wrench flats are
parallel to the long side of the flange. Slide the cross member
assembly of the anti-rotate mechanism over the end of the rod
and onto the wrench flats. Tighten the two screws that clamp the
assembly to the actuator rod.
4.4 Seal Maintenance
If you have chosen the IP65 sealing option (-P5) on your GSM
actuator, it is recommended that the main rod seal and bushing
assembly be replaced at the suggested time of lubrication. The main rod
seal can be removed by threading it out of the face plate using a
standard rod seal gland wrench or spanner wrench. A new main rod seal
can be slid over the main rod, taking care not to touch the seal material
to the threaded rod end. To have this service performed for you, contact
Exlar Engineering or arrange with Exlar Returns Department to send
your unit in for service
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