Emerson Bettis CBB Series - Page 17

Service Instructions
137465E Rev. F
May 2012
14
Section 3: Actuator Reassembly
Actuator Resassembly
3.3.17 Continue to rotate center bar assembly (8-10) clockwise until spring (4-70) is fully
compressed, the spring cylinder is seated against the ange of housing (1-10) or
adapter (4-15) and end cap (4-20) is properly seated in spring cylinder (4-10).
3.3.18 Tighten center bar assembly (8-10) to the proper torque as specied in the
following chart.
Table 3� Tightening torque center bar
Actuator Model Maximum Torque
CBB FT� LBS� N-m
315-SR and 415-SR 55 75
420-SR and 520-SR 100 136
525-SR and 725-SR 130 176
3.3.19 Place seal gasket (5-50) on the exposed end of the center bar assembly (8-10).
3.3.20 Place acorn nut (8-20) on the exposed outboard end of center bar assembly (8-10)
and tighten securely.
3.3.21 Install the stop screw / ES / M3 jackscrew (1-70) for CBB315/415-SR-M3 and non
M3 model actuators as follows:
3.3.21.1 Install stop screw / ES / M3 jackscrew (1-70) into housing (1-10) and
screw in until stop screw contacts the piston.
3.3.21.2 Install o-ring seal (2-30) onto stop screw / ES / M3 jackscrew (1-70) until
it is ush with the housing.
3.3.21.3 Install hex nut (1-80) onto stop screw (1-70) until hand tight.
3.3.22 Install o-ring seal (5-30) onto the stop screw / ES (4-30) until it is ush with the end
cap.
3.3.23 Install new washer (4-90) onto the stop screw / ES (4-30) until it is close to the end
cap
3.3.24 Install hex nut (4-40) onto stop screw / ES (4-30) until hand tight.
3.3.25 Adjust stop screw / ES / M3 jackscrew (1-70) and stop screw / ES (4-30) back to
setting recorded in Section 2 step 2.1.2 under General Disassembly. Tighten both
stop screw hex nuts (4-40) and (1-80) securely, while holding stop screw (1-70)
and (4-30).
3.3.26 M3 hex drive hub or handwheel installation as follows:
3.3.26.1 Install hex drive hub (12-10) or handwheel (12-10) onto M3 jackscrew
(1-70) and align the “hole” of the drive hub with the “hole” located in the
M3 jackscrew.
3.3.26.2 Install retainer ring (12-30) and groove pin (12-20) into the hex drive hub
(12-10) or handwheel (12-10).