Emerson Bettis GTD Series, Service Instructions Manual

Page: 13 / 37

Service Instructions
133893 Rev. C
January 2013
10
Section 3: Actuator Reassembly
Actuator Reassembly
3.2.2 If the two yoke bearings (2-40) are being replaced, install new bearing into housing
cover (1-20) and housing (1-10).
NOTE:
The yoke bearing (2-40) must be press fit into housing (1-10) and housing cover (1-20).
Install the yoke bearings with the bearing seam located 45° ±5° degrees from the yoke arm
slot when yoke (1-70) is rotated to its full clockwise position.
3.2.3 If the two yoke pin thrust bearings (2-10) are being replaced install new bearing
into housing cover (1-20) and housing (1-10).
3.2.4 Lubricate two yoke/guide block bushings (2-30) and install onto top and bottom
sides of guide block assembly (1-30).
3.2.5 Install guide block assembly (1-30), with yoke/guide block bushings (2-30),
between arms of yoke (1-70).
3.2.6 Install o-ring seal (2-50) into inner diameter o-ring groove in the bottom of
housing (1-10).
3.2.7 Coat the bearing surfaces of the yoke (1-70) with lubricant and install into housing
(1-10).
3.2.8 Align hole in guide block assembly (1-30) with the matching holes in the two yoke/
guide block bushings (2-30) and the slots in the arms of yoke (1-70).
NOTE:
The yoke pin can be held in place by installing a screw into the .375-16UNC tapped hole in
the upper end of yoke pin (1-80).
3.2.9 Install yoke pin (1-80) by inserting into the upper yoke arm, upper yoke/guide
block bushing, guide block assembly, lower yoke/guide block bushing, lower yoke
arm and resting on lower yoke pin thrust bearing (2-10).
3.2.10 Install guide bar (1-90) into either side of housing (1-10) by inserting through the
housing, through guide block assembly and then insert the guide bar into the
other side of housing (1-10).
3.2.11 Refer to assembly drawing page 2 of 2 Section A-A. Install spring pin (1-100) into
the top of yoke (1-70).
3.2.12 Install position indicator assembly (1-140) onto the top of yoke (1-70) and over
spring pin (1-100).
NOTE:
Refer to Section 2 step 2.4.6 for correct installation position.
3.2.13 Install o-ring (2-50) into housing cover (1-20).
3.2.14 Install housing cover o-ring (2-60) into housing cover (1-20).
3.2.15 Install the housing cover (1-20), being careful not to damage o-ring seals (2-50)
and (2-60).
3.2.16 Place lockwashers (1-115) onto hex cap screws (1-110).