Bettis P/N 127073E
Revision “A”
Page 13 of 37
3.2.16 Lubricate two yoke/guide block bushings (2-30) and install onto top and bottom sides of
guide block (1-30).
NOTE: The guide block (1-30) should be already pre-assembled with extension rod assembly
and associated parts assembled in the guide block.
3.2.17 Install guide block (1-30), with yoke/guide block bushings (2-30), between arms of yoke
(1-70).
3.2.18 Install o-ring seal (2-50) into inner diameter o-ring groove in the bottom of housing (1-10).
3.2.19 Coat the bearing surfaces of the yoke (1-70) with lubricant and install into housing (1-10).
3.2.20 Align hole in guide block (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).
3.2.21 Install yoke pin (1-80) by inserting into the upper yoke arm, upper yoke/guide block
bushing, guide block, lower yoke/guide block bushing, lower yoke arm and resting on
lower yoke pin thrust bearing (2-10).
3.2.22 Install guide bar (1-90) into either side of housing (1-10) by inserting through the housing,
through guide block and then insert the guide bar into the other side of housing (1-10).
3.2.23 Refer to assembly drawing page 2 of 2 Section A-A. Install spring pin (1-100) into the top
of yoke (1-70).
3.2.24 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 2.3.7 for correct installation position.
3.2.25 Install o-ring (2-50) into housing cover (1-20).
3.2.26 Install housing cover o-ring (2-60) into housing cover (1-20).
3.2.27 Install the housing cover (1-20), being careful not to damage o-ring seals (2-50) and
(2-60).
3.2.28 Place lockwashers (1-115) onto hex cap screws (1-110).
NOTE: On G7 through G10 model actuators apply thread adhesive, Locktite 242, to threads of
hex cap screws (1-110). Reference assembly drawing note number 9.
3.2.29 Install hex cap screws (1-110) with lockwashers (1-115) through housing cover (1-20) and
into housing (1-10). NOTE: Leave hex cap screws (1-110) finger tight - do not tighten.
3.2.30 NOTE: Do this step only if groove pins (1-130) have been pulled or if the pins are being
replaced. Drive groove pins (1-130) through housing cover (1-20) and into housing
(1-10). The groove pins should be flush with the cover.
