Emerson Bettis G2 Series Disassembly And Reassembly

October 2015
Service Instructions
127072E Rev. C
9
Section 2: Actuator Disassembly
Actuator Disassembly
2�3�16 Rotate the arms of yoke (1-70) to the center position of housing (1-10).
2�3�17 Remove yoke (1-70) with yoke pin (1-80), guide block (1-30), two yoke/guide
block bushings (2-30) by lifting yoke up and out of the housing (1-10).
2�3�18 Remove bottom yoke pin thrust bearing (2-10) from inside bottom of housing (1-10).
2�3�19 Remove yoke pin (1-80) by inserting 3/8" 16 UNC screw into top of the yoke pin
and pull straight up and out.
2�3�20 Remove guide block (1-30) from between the arms of yoke (1-70).
2�3�21 Remove yoke/guide block bushing (2-30) from the top of guide block (1-30).
2�3�22 Remove yoke/guide block bushing (2-30) from the top of the lower yoke arm of
yoke (1-70).
NOTE:
For G01 model actuators skip steps 2.3.23 through 2.3.25 and continue disassembly at
step 2.3.26.
2�3�23 Refer to assembly drawing page 2 of 2 Detail "B". Use Bettis tool part numbers
117368 (G8/G10), 117369 (G5/G7), 117370 (G3/G4), or 123616 (G2) and remove
retention retainer nut assemblies (1-60) from guide block (1-30). On spring-return
actuators also remove retention retainer nut assemblies (9-60).
2�3�24 Remove rod extension assembly (1-50) from guide block (1-30). On spring-return
actuators also remove rod extension assembly (9-50).
NOTE:
Spherical washers (1-40) and (9-40) will be removed from guide block (1-30) when the
extension rod assemblies are removed.
2�3�25 Remove the remaining spherical washer (1-40) from guide block (1-30). On spring-
return actuators, also remove the remaining spherical washer (9-40) from guide
block (1-30).
2�3�26 Unscrew and remove two stop screw nuts (1-190) from stop screws (1-180).
2�3�27 Unscrew and remove two stop screws (1-180) from housing (1-10).
2�3�28 Housing (1-10) vent check assembly removal as follows:
2�3�28�1 For G01, G2 and G3 housing (1-10) unscrew and remove one vent check
assembly (13) from the front of housing (1-10).
2�3�28�2 For G4 through G10 housing (1-10) unscrew and remove two vent check
assemblies (13) from the front of housing (1-10).
2�3�29 The following items do not need to be removed from their assembled locations
unless being replaced by new items: Two guide bar bearings (2-20), two yoke
bearings (2-40), yoke pin bearing (2-25), yoke pin thrust bearing (2-10) and spring
pin (1-100).

Emerson Bettis G2 Series Specifications

General

Brand	Emerson
Model	Bettis G2 Series
Category	Controller
Language	English