BIFFI FCB Series, Manual

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March 2022
Service Instructions
VCIOM-15313-EN Rev. 1
16
Section 3: Actuator Reassembly
Actuator Reassembly
Table 3. Tightening Torque Center Bar
FCBB Actuator
Model
Maximum Torque
lb-in Nm
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 FCBB315/415-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 flush with the housing.
3.3.21.3 For FCBBXXX-SR-M3/M3HW models, install hex nut (1-80) onto stop
screw (1-70) until it is hand-tight.
3.3.21.4 For FCBBXXX-SR modles, install hex nut (4-40) and washer (1-90) onto
stop screw (1-70) until hand-tight.
3.3.21.5 Install hex nut (1-80) onto stop screw (1-70) until it is hand-tight.
3.3.22 Install O-ring seal (5-30) onto the stop screw/ES (4-30) until it is flush 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 it is 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).