Bettis P/N 127073E
Revision “A”
Page 12 of 37
3.2.4
Install second spherical washer (1-40) over threaded end of extension rod assembly
(1-50). NOTE: The spherical side of the washer will go on the extension rod assembly
facing the head of the extension rod assembly.
3.2.5
Install extension rod assembly (1-50) into guide block (1-30) and up against the first
spherical washer (1-40).
3.2.6
Install extension retainer nut (1-60) over extension rod assembly (1-50) and screw into
guide block (1-30).
3.2.7
Tighten extension retainer nut assembly (1-60) until extension rod assembly (1-50) can
not move. Back off the extension retainer nut assembly (1-60) just enough to allow for
extension rod assembly (1-50) to move freely.
NOTE: Steps 3.2.8 through 3.2.13 are to be completed when the actuator is equipped with a
Spring Module. If the actuator is Double Acting then skip steps 3.2.8 through 3.2.13 and
continue actuator reassembly starting with step 3.2.14.
3.2.8
Lubricate guide block (1-30), two spherical washers (9-40) and one extension rod
assembly (9-50).
3.2.9
Install one spherical washer (9-40) into the side of guide block (1-30). NOTE: The
spherical side of washer (9-40) will be facing to the outside of guide block (1-30).
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: Consult Waller 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 press fit 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 thrust bearings (2-10) are being replaced install new bearing into
housing cover (1-20) and housing (1-10).
