Section 3: Actuator Reassembly; General Reassembly - Emerson CBA730 Disassembly And Reassembly

Service Instructions
137462E Rev. D

Section 3: Actuator Reassembly

3�1

General Reassembly

CAUTION: CHECK SHELF LIFE OF SEALS
Only new seals that are still within the seals expectant shelf life should be installed into the
actuator being refurbished.
3.1.1
3.1.2
3.1.3
CAUTION: REPLACE WITH NEW PARTS
Actuator parts that reflect any of the above listed characteristics may need replacement
with new parts.
3.1.4
3.1.5
3.1.6
Actuator Reassembly
Remove and discard all old seals and gaskets.
All parts should be cleaned to remove all dirt and other foreign material prior
to inspection.
All parts should be thoroughly inspected for excessive wear, stress cracking,
galling and pitting. Attention should be directed to threads, sealing surfaces
and areas that will be subjected to sliding or rotating motion. Sealing surfaces of
the cylinder, torque shaft and center bar must be free of deep scratches, pitting,
corrosion and blistering or flaking coating.
INSTALLATION LUBRICATION INSTRUCTIONS: Use the correct lubrication as
defined in Section 1 step 1.6.
3.1.4.1 Before installation, coat all moving parts with lubricant.
3.1.4.2 Coat all seals with lubricant, before installing into seal grooves.
Torque shaft upper bearing and the lower bearing are not recommended as parts
that require field replacement. Consult Houston, Texas Bettis Service Coordinator
for "torque shaft upper or lower bearing" replacement information.
CBAX30 double-acting actuator construction as follows:
3.1.6.1 STANDARD CONSTRUCTION - Cylinder (4-10) or cylinder adapter (4-
15) and cylinder (4-10) mounted on the left side of housing (1-10) and
housing adapter (6-10) mounted on the right side of housing (1-10).
3.1.6.2 -S INVERSE CONSTRUCTION - Cylinder (4-10) or cylinder adapter (4-15)
and cylinder (4-10) mounted on the right side of housing (1-10) and the
housing adapter (6-10) mounted on the left side of housing (1-10).
Section 3: Actuator Reassembly
August 2015
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