July 2020
Installation, Operation and Maintenance Manual
VA-DC-000-1803 Rev. 2
18
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
rst 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 yoke pin thrust bearings (2-10) are being replaced install new bearings 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).
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