BIFFI FCB Series, Manual

Page: 13 / 30

Service Instructions
VCIOM-15313-EN Rev. 1 March 2022
9
Section 2: Actuator Disassembly
Actuator Disassembly
2.2.3 Remove breather (30) from end cap (4-20).
2.2.4 For models with BREATHER -10 COLD TEMP, do the following:
2.2.4.1 Remove breather (30-10), elbow (30-30) and hex nipple (30-20) from
end cap (4-20).
2.2.5 Remove acorn nut (8-20) and gasket seal (5-50) from end cap (4-20).
2.2.6 Use a ratchet and socket on the welded nut, located on the housing end of center
bar assembly (8-10). Rotate center bar assembly (8-10) counter-clockwise (CCW).
This will cause end cap (4-20) to gradually unscrew from center bar assembly (8-10).
NOTE:
The end cap (4-20) can be held in position by holding the end cap (4-20) with an
adjustable wrench.
2.2.7 Continue to rotate center bar assembly (8-10) counter-clockwise (CCW) until the
spring preload is eliminated. As preload is reduced it may be necessary to keep end
cap (4-20) from turning.
2.2.8 After the spring preload is eliminated, unscrew and remove end cap (4-20) from
center bar assembly (8-10).
2.2.9 Remove spring (4-70) from within spring cylinder (4-10).
2.2.10 Hold torque shaft (1-30) and pull spring cylinder (4-10) away from housing (1-10);
slide spring cylinder over piston (4-50) and remove.
2.2.11 For FCBBXXX-SR-M3/M3HW and FCBBXXX-SR models, do the following:
2.2.11.1 Remove spacer (4-25) from center bar assembly (8-10).
2.2.12 Pull piston (4-50) out of housing (1-10) and carefully slide piston off of center bar
assembly (8-10).
NOTE:
Piston (4-50) is an assembly made up of one roll pin and one yoke pin; do not attempt to
disassemble the piston assembly.
2.2.13 On models FCBB415-SR, FCBB520-SR, and FCBB725-SR, remove cylinder
adapter (4-15).