Emerson Bettis GTD Series, Service Instructions Manual

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Service Instructions
133893 Rev. C
January 2013
12
Section 3: Actuator Reassembly
Actuator Reassembly
3.2.21 Install thrust bearing (2-110) onto position indicator (1-140).
3.2.22 Install o-ring seal (2-100) onto position indicator (1-140).
3.2.23 Install upper bearing (2-120) into yoke cover (1-150).
3.2.24 Install rod wiper (2-80) into yoke cover (1-150).
3.2.25 Install o-ring seal (2-70) into yoke cover (1-150).
3.2.26 Install yoke cover (1-150) onto housing cover (1-20) and over position indicator
assembly (1-140).
NOTE:
During yoke cover installation be careful not to damage o-ring seal (2-70) and rod wiper (2-80).
3.2.27 Place lockwashers (1-170) onto hex cap screws (1-160).
3.2.28 Install and tighten hex cap screws (1-160) with lockwashers through yoke cover
(1-150) and into housing cover (1-20).
3.2.29 Vent check assembly installation as follows:
3.2.29.1 GTD01, GTD2 and GTD3 housing (1-10) using pipe sealant install one
vent check assembly (13) into the front of housing (1-10).
3.2.29.2 GTD01, GTD2 and GTD3 housing (1-10) using pipe sealant install one
vent check assembly (13) into the top area of housing cover (1-20).
3.2.29.3 GTD4 through GTD7 housing (1-10) using pipe sealant install two vent
check assemblies (13) into the front of housing (1-10).
3.2.30 NOTE: Refer to Section 2 step 2.4.2 for correct position indicator placement. Install
position indicator (1-220) over the exposed shaft of position indicator assembly
(1-140).
3.2.31 Install o-ring seals (2-90) onto stop screw plugs (1-180).
3.2.32 Install and tighten two stop screw plugs (1-180) into two stop screw plug holes on
the front of housing (1-10).
3�3 GTD Gas Cylinder Reassembly
NOTE:
Review Section 3.1 General Reassembly before proceeding with GTD gas cylinder reas-
sembly.Reassemble the GTD gas cylinder on a work bench per the following steps and then
install on the Drive Module per this section.
In Section 3.3 where the step indicates to "lubricate or coat with lubricant", use lubricant as
listed in Section 1.6 for lubricating of the part being installed.
For steps 3.3.2 through 3.3.5 refer to assembly drawing page 2 of 2 Detail “C”.
3.3.1 Lubricate piston rod assembly (3-40) with lubricant.
3.3.2 Install o-ring seal (4-70) into the seal groove in piston rod assembly (3-40).
3.3.3 Install two split ring halves (3-50) into the inner most groove in piston rod
assembly (3-40) and retain with one retainer ring (3-60).
3.3.4 Install piston (3-30) onto piston rod assembly (3-40) and up against split rings
installed in step 3.3.3.