Emerson CBA730 - Page 18

August 2015
Service Instructions
137462E Rev. D
14
Section 3: Actuator Reassembly
Actuator Reassembly
3.2.9 Hold the yoke key (1-40) in position and insert the torque shaft (1-30) into and
through housing (1-10) and yoke (1-20).
3.2.10 Install thrust bearing (2-70) onto the upper area of torque shaft (1-30).
3.2.11 Install thrust washer (2-80) onto the upper area of torque shaft (1-30) on top of
thrust bearing (2-70).
NOTE:
A new retaining ring (2-90) is provided in the Bettis CBA Service Kit.
3.2.12 Install the new retaining ring (2-90) into the groove located on the upper area of
torque shaft (1-30).
CAUTION: VERIFY RETAINING RING
Verify that retaining ring (2-90) is properly seated in the groove of torque shaft (1-30).
3.2.13 Install position indicator (1-50) onto the top of torque shaft (1-30).
3.2.14 Rotate the torque shaft (1-30) so that the arms of yoke (1-20) point outward.
3.2.15 Coat O-ring seal (5-20) with lubricant and install into inner diameter seal groove
located in the center bar hole of housing adapter (6-10).
3.2.16 Install hex nut (8-20) onto one end of center bar (8-10).
3.2.17 Coat entire length of center bar assembly (8-10) with lubricant including the threads.
3.2.18 Insert center bar assembly (8-10) into the center hole of housing adapter (6-10).
Slide center bar assembly through housing adapter until center bar assembly nut is
ush against the housing adapter (6-10).
WARNING: DO NOT SCRATCH CENTER BAR ASSEMBLY
Care should be taken during installation of center bar assembly so as to not scratch it or
damage the housing adapter O-ring seal (5-20).
NOTE:
Rotate the hex nut down the M3 jackscrew until it is next to the M3 adapter.
3.2.19 Recoat center bar assembly (8-10) with lubricant.
3.2.20 Coat O-ring seal (7-10) with lubricant and install onto outer diameter ange
located on housing adapter end of housing (1-10).
NOTE:
The installation location for O-ring seal (7-10) is dened in step 3.1.6 under
Standard construction and Inverse construction actuators.
3.2.21 Install housing adapter (6-10), with installed center bar assembly (8-10), on to the
cylinder adapter end of housing (1-10).