Emerson Process Management BETTIS G01 - Manual (Page 19)

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.
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.
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).