Emerson Bettis CBB Series - Spring Cylinder Reassembly

Service Instructions
137465E Rev. F
May 2012
12
Section 3: Actuator Reassembly
Actuator Resassembly
3.2.8 Install one of the new retaining rings (1-60) onto the exposed end of the torque
shaft, making certain it is properly seated in the groove of the torque shaft (1-30).
Gently push and rotate the torque shaft (1-30) until the retaining ring (1-60) is
pressed against the housing (1-10). Install the other retaining ring (1-60) to the
other side of the torque shaft (1-30).
CAUTION: TORQUE SHAFT INSTALLATION
Rotate the torque shaft until the yoke key snaps into the yoke keyway.
3.2.9 Rotate the torque shaft (1-30) so that the arms of yoke (1-20) point outward.
3.2.10 Coat O-ring seal (5-20) with lubricant and install into inner diameter seal groove
located in the center bar hole of housing (1-10).
3.2.11 Coat entire length of center bar (8-10) with lubricant including the threads.
3.2.12 Insert center bar assembly (8-10) into the center hole of housing (1-10). Slide
center bar assembly through housing until center bar assembly nut is ush against
the housing (1-10).
WARNING: CENTER BAR ASSEMBLY INSTALLATION
Care should be taken during installation of center bar assembly so as to not scratch it.
3.2.13 Re-coat center bar assembly (8-10) with lubricant.
3.2.14 Coat one o-ring seal (5-10) with lubricant and install onto outer diameter ange
located on housing adapter end of housing (1-10).
3.2.15 Actuators equipped with cylinder adapter (4-15), models CBB415-SR, CBB520-SR
and CBB725-SR, do steps 3.2.15.1 and 3.2.15.2.
3.2.15.1 Install cylinder adapter (4-15) onto housing ange, with the stepped outer
diameter, of cylinder adapter (4-15), facing away from housing (1-10).
3.2.15.2 Install one o-seal (5-15) onto stepped diameter of cylinder adapter (4-15).
3�3 Spring cylinder reassembly
3.3.1 Coat piston (4-50) outer diameter seal groove, inner diameter seal groove, head of
piston and exposed ends of yoke pin with lubricant.
3.3.2 Coat o-ring seal (5-20) with lubricant and install in the internal seal groove in the
head of piston (4-50).
3.3.3 Coat seal (5-40) with lubricant and install into outer diameter seal groove of piston
(4-50). The piston seal will t very loosely in the outer diameter seal groove.
3.3.4 Install bushing (1-100) between the two arms of yoke (1-20).
3.3.5 With the piston head facing away from housing (1-10) and with yoke pin up, install
piston (4-50) onto center bar assembly (8-10).
3.3.6 Carefully slide piston (4-50) along center bar (8-10) until yoke pin engages the
yoke slots.