Emerson Bettis CBB Series Service Instructions Manual page 10

Section 2: Actuator Disassembly
May 2012
NOTE:
The end cap (4-20) can be held in position by holding the end cap (4-20) with an adjustable
wrench.
2.2.6
2.2.7
2.2.8
2.2.9
2.2.10 Remove spacer (1-110) from center bar assembly (8-10).
2.2.11 Pull piston (4-50) out of housing (1-10) and carefully slide piston off of center bar
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.
2.2.12 On models CBB415-SR, CBB520-SR, and CBB725-SR remove cylinder adapter (4-15).
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.
After the spring preload is eliminated, unscrew and remove end cap (4-20) from
center bar assembly (8-10).
Remove spring (4-70) from within spring cylinder (4-10).
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.
assembly (8-10).
Service Instructions
137465E Rev. F
Actuator Disassembly