Service Instructions
124843E Rev. C
August 2015
15
Section 3: Actuator Reassembly
Actuator Reassembly
NOTE:
The spherical side of the washer will go on the extension rod assembly facing
the head of the extension rod assembly.
3.2.11 Install extension rod assembly (9-50) into guide block (1-30) and up against the
first spherical washer (9-40).
3.2.12 Install extension retainer nut (9-60) over extension rod assembly (9-50) and
screw into guide block (1-30).
3.2.13 Tighten extension retainer nut assembly (9-60) until extension rod assembly
(9-50) cannot move. Back off the extension retainer nut assembly (9-60) just
enough to allow for extension rod assembly (9-50) to move freely.
NOTE:
Consult Houston, Texas Bettis Service Coordinator for “yoke bearing, yoke pin bearing or
yoke/guide block bushing installation information.
3.2.14 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 pressed 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.
3.2.15 If the two yoke pin bearings (2-10) are being replaced install new bearing into
housing cover (1-20) and housing (1-10).
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 bearings (2-30), between arms
of yoke (1-70).
3.2.18 Install one O-ring seal (2-50) into inner diameter seal groove in the bottom of
housing (1-10).
3.2.19 Coat the bearing surfaces of 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).
