Emerson Bettis G Series - Page 23

Installation, Operation and Maintenance Manual
VA-DC-000-1878 Rev. 0 December 2020
19
Section 3: Actuator Reassembly
Actuator Reassembly
NOTE:
The guide block (1 - 30) should be already preassembled with extension rod assembly and
associated parts assembled in the guide block.
3.2.16 Install guide block (1 - 30), with yoke/guide block bushings (2 - 30), between arms
of yoke (1 - 70).
3.2.17 Install O-ring seal (2 - 50) into inner diameter O-ring groove in the bottom of
housing (1 - 10).
3.2.18 Coat the bearing surfaces of the yoke (1 - 70) with lubricant and install into
housing (1 - 10).
3.2.19 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 - 16 UNC tapped hole in
the upper end of yoke pin (1 - 80).
3.2.20 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).
3.2.21 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).
3.2.22 Refer to assembly drawing page 2 of 2 Section A-A. Install spring pin (1 - 100) into
the top of yoke (1 - 70).
3.2.23 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.
3.2.24 Install O-ring (2 - 50) into housing cover (1 - 20).
3.2.25 Install housing cover O-ring (2 - 60) into housing cover (1 - 20).
3.2.26 Install the housing cover (1 - 20), being careful not to damage O-ring seals (2 - 50)
and (2 - 60).
3.2.27 Place lock washers (1 - 115) onto hex cap screws (1 - 110).
NOTE:
On G7 through G10 model actuators apply thread adhesive, Loctite 242, to threads of hex
cap screws (1 - 110). Reference assembly drawing note number 9.