Emerson Process Management bettis g13 User Manual
Bettis P/N 124840E
Revision “B”
Page 15 of 46
3.2.10 Install second spherical washer (9-40) over threaded end of extension rod assembly
(9-50). NOTE: The spherical side of the washer will go on the extension rod assembly
facing the head of 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) can not
move. Back off the extension retainer nut assembly (9-60) just enough to allow for
extension rod assembly (9-50) to move freely.
extension rod assembly (9-50) to move freely.
NOTE: Steps 3.2.14 and 3.2.15 are to be completed when the actuator is Double Acting and
equipped with a Blind end cap extended stop screw.
3.2.14 Install guide block stop plug (5-50) into guide block (1-30).
3.2.15 Install and tighten rod extension retainer nut assembly (5-80) over guide block stop plug
(5-50) and screw into guide block (1-30).
NOTE: Consult Waller Texas Bettis Service Coordinator for “yoke bearing, yoke pin bearing or
yoke/guide block bushing installation information.
3.2.16 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.
3.2.17 If the two yoke pin bearings (2-10) are being replaced install new bearing into housing
cover (1-20) and housing (1-10).
3.2.18 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.
3.2.19 Install guide block (1-30), with yoke guide block bearings (2-30), between arms of yoke
(1-70).
3.2.20 Install one o-ring seal (2-50) into inner diameter seal groove in the bottom of housing
(1-10).
3.2.21 Coat the bearing surfaces of yoke (1-70) with lubricant and install into housing (1-10).