Emerson Bettis CBB Series - Page 16

May 2012
Service Instructions
137465E Rev. F
13
Section 3: Actuator Reassembly
Actuator Resassembly
NOTE:
While holding the center bar assembly ush against the housing, push piston (4-50) into
housing (1-10) as far as the piston will go.
3.3.7 Apply a coating of lubricant to entire bore of spring cylinder (4-10).
3.3.8 Spring cylinder installation:
3.3.8.1 For CBB415-SR, CBB520-SR and CBB725-SR models install the lubricated
spring cylinder (4-10) over the piston and up-against the o-ring seal on
the stepped diameter ange of cylinder adapter (4-15).
3.3.8.2 For CBB315-SR, CBB420-SR and CBB525-SR models install the lubricated
spring cylinder (4-10) over the piston and up-against the o-ring seal on
the ange of housing (1-10).
3.3.9 Install spacer (1-110) onto center bar assembly (8-10).
3.3.10 Apply a coat of lubricant to the spring (4-70). Install the spring into the spring
cylinder by carefully sliding the spring into the open spring cylinder end until the
spring contacts the head of piston (4-50).
3.3.11 End cap seal installation.
3.3.11.1 For CBB415-SR, CBB520-SR and CBB725-SR models install O-ring seal
(5-15) onto end cap (4-20).
3.3.11.2 For CBB315-SR, CBB420-SR and CBB525-SR models install O-ring seal
(5-10) onto end cap (4-20).
3.3.12 If removed install stop screw / ES (4-30) into end cap (4-20) and set stop screw to
the approximated setting recorded in Section 2 step 2.1.2.
NOTE:
Position spring cylinder (4-10) so that spring tag (4-60) will be adjacent to accessory
mounting pads located on the actuator housing.
3.3.13 Install end cap (4-20) onto center bar assembly (8-10) by rotating the end cap in a
clockwise direction.
3.3.14 Position the end cap (4-20) so that the breather port is at the bottom and the stop
screw / ES (4-30) is at the top.
WARNING: END CAP INSTALLATION
Do not allow end cap (4-20) to rotate during center bar assembly tightening. The end cap
must maintain the position as described in step 3.3.14.
3.3.15 Keep end cap (4-20) from turning by holding end cap with an adjustable wrench.
3.3.16 Using a ratchet and socket on the center bar assembly nut, rotate center bar
assembly clockwise (CW). This will cause end cap (4-20) to gradually screw further
onto center bar assembly (8-10).