Emerson CBA730 - Page 20

August 2015
Service Instructions
137462E Rev. D
16
Section 3: Actuator Reassembly
Actuator Reassembly
3.3.9 With the piston head facing away from housing (1-10), install piston assembly
(4-50) onto center bar assembly (8-10).
3.3.10 Carefully slide piston assembly (4-50) along center bar assembly (8-10) until the
yoke pin engages the slots of yoke (1-20).
CAUTION: VERIFY BUSHINGS (4-80) ARE INSTALLED
Check to determine that both bushings (4-80) are installed between the arms of yoke
(1-20) and the piston assembly (4-50). Refer to Figure 1.
NOTE:
While holding the center bar assembly ush against the housing adapter (6-10), push
piston assembly (4-50) into housing (1-10) as far as the piston will travel.
3.3.11 Apply a coating of lubricant to entire bore of cylinder (4-10).
3.3.12 Cylinder (4-10) installation:
3.3.12.1 For CBA830, CBA930 and CBA1030 models (including M3/M3HW
models) install the lubricated cylinder (4-10) over the piston and up-
against the O-ring seal on the stepped diameter ange of cylinder
adapter (4-15).
3.3.12.2 For CBA730 models, install the lubricated cylinder (4-10) over the piston
and up against the O-ring seal on the ange of housing (1-10).
3.3.13 Coat O-ring seal (5-20) with lubricant and install into inner diameter seal groove
located in the center bar hole of end cap (4-20).
NOTE:
Actuators equipped with an end cap M3 jackscrew (4-30) pre-install M3 into end cap (4-20)
per step 3.3.14 and then install pre-assembled end cap into cylinder (4-10) per step 3.3.15.
Actuators equipped with housing adapter ES or stop screw (4-30) skip step 3.3.15 and
continue assembly at step 3.3.17.
3.3.14 M3 jackscrew installation to end cap (4-20).
3.3.14.1 Apply a coating of lubricant to outer diameter and inner diameter threads
of M3 jackscrew adapter (4-55).
3.3.14.2 Coat O-ring seal (5-65) with lubricant and install into outer diameter seal
groove located in the M3 jackscrew adapter (4-55).
3.3.14.3 Apply a light coating of lubricant to the threads of M3 jackscrew (4-30).
3.3.14.4 Install and rotate the M3 jackscrew (4-30) into M3 jackscrew adapter (4-55).
NOTE:
Rotate the M3 jackscrew into the adapter until the inboard end of the
jackscrew is up against the adapter.
3.3.14.5 Install M3 jackscrew adapter (4-55) with M3 jackscrew (4-30) into end
cap (4-20).