Emerson CBA730 Installation instructions

Service Instructions
137462E Rev. D
August 2015
CBAX30 Double-Acting Series Pneumatic Actuators
Disassembly and Reassembly

I
Service Instructions
137462E Rev. D
Table of Contents
August 2015
Table of Contents
Table of Contents
Section 1: Introduction
1.1 General Service Information ......................................................................... 1
1.2 Denitions ................................................................................................... 2
1.3 General Safety Information ........................................................................... 2
1.4 Bettis Reference Materials ............................................................................. 3
1.5 Service Support Items .................................................................................. 3
1.6 Lubrication Requirements ............................................................................ 3
1.7 General Tool Information .............................................................................. 3
1.8 Actuator Weight ........................................................................................... 4
1.9 Actuator Storage........................................................................................... 4
1.10 Actuator Installation ..................................................................................... 4
1.11 Actuator Start-up .......................................................................................... 5
1.12 Actuator Operation....................................................................................... 6
Section 2: Actuator Disassembly
2.1 General Disassembly .................................................................................... 7
2.2 Pneumatic Cylinder Disassembly .................................................................. 8
2.3 Housing Disassembly ................................................................................... 9
Section 3: Actuator Reassembly
3.1 General Reassembly ................................................................................... 11
3.2 Housing Reassembly ................................................................................. 12
3.3 Pneumatic Cylinder Reassembly .................................................................. 15
Section 4: Actuator Testing
4.1 Actuator Testing ......................................................................................... 19
Section 5: Field Conversions
5.1 High Temperature Service (-10 TRIM).......................................................... 21
5.2 Low Temperature Service (-11 TRIM)........................................................... 21
5.3 Add an Extended Stop (ES) to Housing Adapter (6-10)................................. 21
5.4 Add an Extended Stop (ES) to Cylinder End Cap (4-20)................................. 22
5.5 Add an M3 Jackscrew to Housing Adapter (6-10) ......................................... 23
5.6 Add an M3 Jackscrew to Cylinder Outer End Cap (4-20) ............................... 24
5.7 Add M11 Override Cylinders and Pump Package.......................................... 24

II
Table of Contents
August 2015
Service Instructions
137462E Rev. D
Table of Contents
Section 6: Troubleshooting
6.1 Fault Insertion ............................................................................................. 25
6.2 Operational Test.......................................................................................... 26
Section 7: Removal and Decommissioning
7.1 Removal and Decommissioning .................................................................. 27
Section 8: Document Revision ��������������������������������������������28
Appendix A: List of Tables ���������������������������������������������������29
Appendix B: List of Figures ��������������������������������������������������30
Appendix C: List of Drawings ����������������������������������������������31

Service Instructions
137462E Rev. D August 2015
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Section 1: Introduction
Introduction
Section 1: Introduction
1�1 General Service Information
1.1.1 This service procedure is offered as a guide to enable general maintenance to be
performed on Bettis™ CBA-300 double-acting series actuators.
The following is a list of general CBA-300 model numbers:
Table 1� CBA-300 Model Numbers
MODEL (1) MODEL (1) MODEL (1)
CBA730 CBA730-M3 CBA730-M3HW
CBA830 CBA830-M3 CBA830-M3HW
CBA930 CBA930-M3 CBA930-M3HW
CBA1030 CBA1030-M3 CBA1030-M3HW
(1) Also includes actuator models with –10 and –11 as a sufx
NOTE:
When the actuator model number has “-S” as a sufx then the actuator is special and may
have some differences that may not be included in this procedure.
1.1.2 Normal recommended service interval for this actuator series is ve years.
NOTE:
Storage time is counted as part of the service interval.
1.1.3 This procedure is applicable with the understanding that all electrical power and
pneumatic pressure has been removed from the actuator.
1.1.4 Remove all piping and mounted accessories that will interfere with the module(s)
that are to be worked on.
1.1.5 This procedure should only be implemented by a technically competent technician
who should take care to observe good workmanship practices.
1.1.6 Numbers in parentheses, ( ) indicate the bubble number (reference number) used
on the Bettis Assembly Drawing and Actuator Parts List.
1.1.7 This procedure is written using the serial number tag side of the housing (1-10)
as a reference and this side will be considered the front side of the actuator. The
position indicator (1-50) area of housing (1-10) will be the top of the actuator.
1.1.8 When removing seals from seal grooves, use a commercial seal removing tool or a
small screwdriver with sharp corners rounded off.
1.1.9 Use a non-hardening thread sealant on all pipe threads.

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Service Instructions
137462E Rev. D
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Section 1: Introduction
Introduction
CAUTION: FOLLOW MANUFACTURER'S INSTRUCTIONS
Apply the thread sealant per the manufacturer’s instructions.
1.1.10 Bettis recommends that disassembly of the actuator should be done in a clean
area on a workbench.
1�2 Definitions
WARNING:
If not observed, user incurs a high risk of severe damage to actuator and/or fatal injury
to personnel.
CAUTION:
If not observed, user may incur damage to actuator and/or injury to personnel.
NOTE:
Advisory and information comments provided to assist maintenance personnel to carry out
maintenance procedures.
NOTE:
This product is only intended for use in large-scale xed installations excluded from the
scope of Directive 2011/65/EU on the restriction of the use of certain hazardous substances
in electrical and electronic equipment (RoHS 2).
M3:
Jackscrew or jackscrew assembly
ES:
Extended Stop(s)
1�3 General Safety Information
1.3.1 Products supplied by Bettis, in its “as shipped” condition, are intrinsically safe if the
instructions contained within this Service Instruction are strictly adhered to and
executed by well trained, equipped, prepared and competent personnel.
WARNING: FOLLOW WARNING AND CAUTION SIGNS
For the protection of personnel working on Bettis actuators, this procedure should be
reviewed and implemented for safe disassembly and reassembly. Close attention should be
noted to the WARNINGS, CAUTIONS and NOTES contained in this procedure.

Service Instructions
137462E Rev. D August 2015
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Section 1: Introduction
Introduction
WARNING: FOLLOW COMPANY SAFETY PROCEDURES
This procedure should not supersede or replace any customer’s plant safety or work
procedures. If a conict arises between this procedure and the customer’s procedures, the
differences should be resolved in writing between an authorized customer's representative
and an authorized Bettis representative.
1�4 Bettis Reference Materials
1.4.1 CBA-300 assembly drawing use part number 129742.
1.4.2 CBA-300-M3HW assembly drawing use part number 129744.
1�5 Service Support Items
1.5.1 Bettis Service Kit.
1.5.2 Commercial leak testing solution.
1.5.3 Non-hardening thread sealant.
1�6 Lubrication Requirements
1.6.1 The actuator should be relubricated at the beginning of each service interval using
the following recommended lubricants.
NOTE:
Lubricants other than those listed in steps 1.6.2 should not be used without prior written
approval of Bettis Product Engineering.
1.6.2 All temperature services (-50°F to +350°F)/(-45.5°C to 176.6°C) use Bettis ESL-5
lubricant. ESL-5 lubricant is contained in the Bettis module service kit in tubes and
the tubes are marked ESL-4, 5 and 10 lubricant.
1�7 General Tool Information
1.7.1 All threads on CBA series actuators are Inch Unied and NPT.
1.7.2 All tools/Hexagons are American Standard inch.
1.7.3 Suggested tools: Two adjustable wrenches, small standard screwdriver with sharp
edges rounded off, medium size standard screwdriver, external snap ring pliers, drive
ratchet / deep well socket set and torque wrench (up to 3,000 inch pounds / 339 N-m).

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Service Instructions
137462E Rev. D
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Section 1: Introduction
Introduction
1�8 Actuator Weight
Table 2� Actuator Weight
Actuator
Model
Approximate Weight (2) Actuator
Model
Approximate Weight (2)
LB KG LB KG
CBA730 130 59 CBA930 155 70.4
CBA730-M3 131 59.4 CBA930-M3 158 71.7
CBA730-
M3HW 131.5 59.6 CBA930- M3HW 158.5 71.9
CBA830 140 63.5 CBA1030 170 77.1
CBA830-M3 143 64.9 CBA1030-M3 173 78.5
CBA830-
M3HW 143.5 65.1 CBA1030- M3HW 173.5 78.7
(2) Weight is for bare actuator without accessories or valve adaptation.
1�9 Actuator Storage
For applications where the actuator is not placed into immediate service, it is
recommended that the actuator be cycled with regulated clean/dry pneumatic pressure
at least once per month. Indoor storage, if available, is recommended for all actuators.
Care should be taken to plug all open ports on actuator and controls to keep out foreign
particles and moisture. Actuators should not be stored in an atmosphere that is harmful to
resilient seals. Contact factory for extended storage period.
1�10 Actuator Installation
1.10.1 Since there are many valve and actuator combinations, it is not practical to include
detailed instructions for each type. Mountings are designed to be as simple as
possible to keep the guess work out of the installation.
1.10.2 Actuators that are shipped from the factory with the travel stops adjusted for
approximately ninety-degree rotation. Generally, it is necessary to make slight
travel stop adjustments once the actuator is installed onto the valve. Refer to the
valve manufacturer's recommendations for specic requirements. When the valve
has internal stops, the actuator should be adjusted at the same points.
NOTE:
The actual "stopping" should be done by the actuator. If the valve does not have internal
stops, adjust the actuator to the full open position. Using this as a reference point, rotate
the valve closed and adjust to the valve manufacturer's specications for total rotation.

Service Instructions
137462E Rev. D August 2015
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Section 1: Introduction
Introduction
1.10.3 Good instrument practices are also recommended. Clean/dry regulated
pneumatic pressure is essential for long service life and satisfactory operation.
It should be noted that new pneumatic lines often have scale and other debris in
them and these lines should be purged of all foreign material.
NOTE:
Scale and debris can damage control valves, solenoids and seals.
1�11 Actuator Start-up
1.11.1 Prestart-up checks
1. Inspect to ensure the unit has been mounted onto valve properly. Gear
ange mounting bolts, stem key, set screw(s) are installed and secured.
2. No tubing damaged or accessories dislodged during the shipping or
the installation.
3. Indicated position conrms valve position.
4. All switching valves in normal operating position as per
SCHEMATIC / INSTRUCTIONS.
1.11.2 Check connections
1. Pneumatic / hydraulic components connected as per schematic enclosed or
in service manual supplied.
2. Pneumatic supply connected to the identied ports.
3. Electrical connection terminals are secured.
4. Wiring as per enclosed diagram or service manual supplied.
1.11.3 When actuator is rst placed into service, it should be cycled with regulated
pneumatic pressure. This is necessary because the seals have been stationary,
causing them to take a "set". Therefore, the actuator should be operated through
several cycles to exercise the seals so as to achieve a service ready condition.
1.11.4 The actuator speed of operation is determined by a number of factors includes:
1. Power supply line length
2. Power supply line size
3. Power supply line pressure
4. Control valve and tting orice size
5. Torque requirements of the valve
6. Size of the actuator
7. Setting of speed controls
8. Hydraulic Manual Override (where available)

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Service Instructions
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Section 1: Introduction
Introduction
1.11.5 Due to the interaction of these variables, it is difcult to specify a "normal"
operating time. Faster operating time may be obtained by using one or more of
the following:
1. Larger supply lines
2. Larger control valve
3. Higher supply pressure *
4. Quick exhaust valves
— * Not to exceed maximum operating pressure of actuator or
control components
1.11.6 Slower operating time may be obtained by using ow control valves to meter the
exhaust. Excessive exhaust ow metering may cause erratic operation.
1�12 Actuator Operation
1.12.1 Controlled Operation: Controlled operation is accomplished by pressurizing and/
or depressurizing the appropriate cylinder inlet(s) of a double-acting. Do not
exceed pressures indicated on actuator nameplate.
1.12.2 Manual Operation: All pressure must be vented or equalized on both sides of the
pneumatic piston prior to manual operation.

Service Instructions
137462E Rev. D August 2015
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Section 2: Actuator Disassembly
Actuator Disassembly
Section 2: Actuator Disassembly
2�1 General Disassembly
WARNING: DANGEROUS GAS AND/OR LIQUIDS
It is possible, that the actuator may contain a dangerous gas and/or liquids. Ensure that
all proper measures have been taken to prevent exposure or release of these types of
contaminants before commencing any work.
CAUTION: DO NOT EXCEED OPERATING PRESSURE
Pressure applied to the actuator is not to exceed the maximum operating pressure rating
listed on the actuator name tag.
NOTE:
Before starting the general disassembly of the actuator, it is a good practice to operate
actuator with the pressure used by the customer during normal operation. Notate and
record any abnormal symptoms such as jerky or erratic operation.
2.1.1 Remove all operating pressure from actuator.
NOTE:
In place of stop screws, the actuator may be equipped with one or two ES (ES = Extended
Stops) or M3/M3HW located on outboard end of housing (1-10) and end cap (4-20).
2.1.2 Record the settings of stop screw, ES or M3 jackscrews (6-30) and (4-30) before
they are loosened or removed.
2.1.3 To help in correct reassembly, all mating parts should be marked or tagged for
ease of reassembly, i.e. cylinder to cylinder adapter, cylinder adapter to housing,
housing to torque shaft and housing to housing adapter, etc.

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Service Instructions
137462E Rev. D
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Section 2: Actuator Disassembly
Actuator Disassembly
2�2 Pneumatic Cylinder Disassembly
NOTE:
Review Section 2 steps 2.1.1 through 2.1.3 before proceeding with cylinder disassembly.
2.2.1 Remove hex nut (4-40) as follows: CBA730 through CBA1030 standard end cap
stop screw or extended stop (ES), use step 2.2.1.1. CBA730 through CBA1030 with
-M3 or -M3HW use step 2.2.1.2.
2.2.1.1 CBA730 through CBA1030 end cap stop screw or extended stop screw
(ES)
2.2.1.1.1 Loosen and remove hex nut (4-40) and washer (4-90) from stop
screw (4-30) located in end cap (4-20).
2.2.1.1.2 Remove stop screw (4-30) from the end cap (4-20).
2.2.1.2 CBA730 through CBA1030-M3 or -M3HW
2.2.1.2.1 Remove retainer ring (12-30) and groove pin (12-20) from
optional hex drive hub or from hand wheel (12-10).
2.2.1.2.2 Remove optional hex drive hub or hand wheel (12-10) from M3
jackscrew (4-30).
2.2.1.2.3 Remove caution tag (12-40) from M3 jackscrew (4-30).
2.2.1.2.4 Loosen and remove hex nut (4-40) from M3 jackscrew (4-30).
NOTE:
For CBA730 through CBA1030-M3 or M3HW models, the M3 jackscrew (4-30)
cannot be removed now. The M3 used in these models can be removed later in this
procedure using step 2.2.7.
2.2.2 Remove housing side hex nut (8-20) from center bar (8-10).
2.2.3 Remove outer end cap (4-20) from outboard end of cylinder (4-10).
NOTE:
ES (4-30) or stop screw (4-30) does not require removal from end cap (4-20) unless
replacing with a new ES or stop screw.
2.2.4 Slide cylinder (4-10) over piston (4-50) and remove.
2.2.5 Remove piston (4-50) from center bar (8-10).
NOTE:
The standard non-M3 piston (4-50) is an assembly made up of one roll pin and one yoke
pin; do not attempt to disassemble the piston assembly. The M3 piston (4-50) has two
targets and four drive screws in addition to the roll pin and yoke pin.

Service Instructions
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Section 2: Actuator Disassembly
Actuator Disassembly
2.2.6 On actuator models CBA830, CBA930 and CBA1030, remove cylinder adapter (4-15)
from ange of housing (1-10). Model CBA730 is not equipped with a cylinder adapter
(4-15).
2.2.7 M3 JACKSCREW REMOVAL FROM END CAP (4-20).
2.2.7.1 Remove retainer ring (5-60) from M3 adapter (4-55).
2.2.7.2 Remove M3 adapter (4-55) from end cap (4-20).
NOTE:
The M3 adapter will be removed from backside of end cap (4-20) with the
M3 jackscrew (4-30).
2�3 Housing Disassembly
NOTE:
Review Section 2 steps 2.1.1 through 2.1.3 before proceeding with housing disassembly.
2.3.1 Remove hex nut (6-40) as follows: CBA730 through CBA1030 standard housing
adapter stop screw or extended stop (ES) use step 2.3.1.1. CBA730-M3/M3HW
through CBA1030-M3/M3HW use step 2.3.1.2.
2.3.1.1 CBA730 through CBA1030 housing adapter stop screw or extended stop
screw (ES)
2.3.1.1.1 Loosen and remove hex nut (6-40) and washer (6-90) from stop
screw (6-30) located in housing adapter (6-10).
2.3.1.1.2 Remove stop screw (6-30) from housing adapter (6-10).
NOTE:
ES (6-30) or stop screw (6-30) does not require removal from the housing adapter
(6-10) unless replacing with a new ES or stop screw.
2.3.1.2 CBA730 through CBA1030-M3 or M3HW
2.3.1.2.1 Remove retainer ring (12-30) and groove pin (12-20) from
optional hex drive hub or from hand wheel (12-10).
2.3.1.2.2 Remove optional hex drive hub or hand wheel (12-10) from M3
jackscrew (6-30).
2.3.1.2.3 Remove caution tag (12-40) from M3 jackscrew (6-30).
2.3.1.2.4 Loosen and remove hex nut (6-40) from M3 jackscrew (6-30).

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Service Instructions
137462E Rev. D
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Section 2: Actuator Disassembly
Actuator Disassembly
NOTE:
For CBA730 through CBA1030-M3/M3HW models, the M3 jackscrew (4-30)
cannot be removed now. The M3 used in these models can be removed later in this
procedure using step 2.3.10.
2.3.2 Remove center bar (8-10) from housing adapter (6-10).
2.3.3 Remove housing adapter (6-10) from housing (1-10).
2.3.4 Remove the position indicator (1-50) from torque shaft (1-30).
2.3.5 Remove retaining ring (2-90) from torque shaft (1-30).
2.3.6 Remove thrust washer (2-80) and thrust bearing (2-70) from torque shaft (1-30).
2.3.7 Remove the torque shaft (1-30) by pushing it out the bottom of housing (1-10).
2.3.8 Remove yoke key (1-40) from torque shaft (1-30).
2.3.9 Remove yoke (1-20) from housing (1-10).
2.3.10 Actuator equipped with a M3 or M3HW mounted in the housing adapter (6-10)
complete steps 2.3.10.1 and 2.3.10.2.
2.3.10.1 Remove retainer ring (7-60) from M3 adapter (6-55).
2.3.10.2 Remove M3 adapter (6-55) with M3 jackscrew (6-30) from housing adapter
(6-10).

Service Instructions
137462E Rev. D August 2015
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Section 3: Actuator Reassembly
Actuator Reassembly
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 Remove and discard all old seals and gaskets.
3.1.2 All parts should be cleaned to remove all dirt and other foreign material prior
to inspection.
3.1.3 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 aking coating.
CAUTION: REPLACE WITH NEW PARTS
Actuator parts that reect any of the above listed characteristics may need replacement
with new parts.
3.1.4 INSTALLATION LUBRICATION INSTRUCTIONS: Use the correct lubrication as
dened 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.
3.1.5 Torque shaft upper bearing and the lower bearing are not recommended as parts
that require eld replacement. Consult Houston, Texas Bettis Service Coordinator
for “torque shaft upper or lower bearing” replacement information.
3.1.6 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).

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Section 3: Actuator Reassembly
Actuator Reassembly
3�2 Housing Reassembly
NOTE:
Review Section 3 steps 3.1.1 through 3.1.6 before proceeding with actuator reassembly.
In section 3.2 where the step indicates to "lubricate, coat or apply lubricant", use lubricant
as identied in Section 1 step 1.6 for lubricating the part being installed.
Actuators equipped with a housing adapter M3 jackscrew (6-30) install M3 per 3.2.1.
Actuators equipped with housing adapter ES or stop screw (6-30) skip step 3.2.1 and
continue assembly at step 3.2.2.
3.2.1 M3 jackscrew installation to housing adapter (6-10).
3.2.1.1 Apply a coating of lubricant to outer diameter and inner diameter threads
of M3 jackscrew adapter (6-55).
3.2.1.2 Coat O-ring seal (7-65) with lubricant and install into outer diameter seal
groove located in the M3 jackscrew adapter (6-55).
3.2.1.3 Apply a light coating of lubricant to the threads of M3 jackscrew (6-30).
3.2.1.4 Install and rotate the M3 jackscrew (6-30) into M3 jackscrew adapter (6-55).
NOTE:
Rotate the M3 jackscrew into the adapter until the inboard end of the
jackscrew is up against the adapter.
3.2.1.5 Install M3 jackscrew adapter (6-55) with M3 jackscrew (6-30) into
housing adapter (6-10).
3.2.1.6 Install retainer ring (7-60) onto groove in M3 jackscrew adapter (6-55).
3.2.1.7 Install O-ring seal (7-30) onto M3 jackscrew (6-30).
NOTE:
Move the O-ring seal (7-30) down the M3 jackscrew until it is next to the
M3 jackscrew adapter.
3.2.1.8 Install hex nut (6-40) onto M3 jackscrew (6-30).
NOTE:
Rotate the hex nut down the M3 jackscrew until it is next to the M3
jackscrew adapter.
3.2.2 Housing Adapter (6-10) ES or stop screw (6-30) installation.
3.2.2.1 Lubricate ES or stop screw (6-30) and install into housing adapter (6-10).
3.2.2.2 Install O-ring seal (7-30) onto ES or stop screw (6-30).

Service Instructions
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Section 3: Actuator Reassembly
Actuator Reassembly
NOTE:
Move the O-ring seal (7-30) down the ES or stop screw until it is next to
the housing adapter (6-10).
3.2.2.3 Install washer (6-90) onto ES or stop screw (6-30).
NOTE:
Push the washer down the ES or stop screw until it is next to the housing
adapter (6-10).
3.2.2.4 Install hex nut (6-40) onto ES or stop screw (6-30).
NOTE:
Rotate the hex nut down the ES or stop screw until it is next to the
housing adapter (6-10).
3.2.3 Apply a coating of lubricant to the torque shaft holes located on each side of
housing (1-10).
3.2.4 Coat rod wiper seal (2-20) with lubricant and install in the grooves located in the
upper torque shaft “through hole” of housing (1-10).
NOTE:
The cup of wiper seal will be installed facing down into the housing.
3.2.5 Coat u-cup seal (2-40) with lubricant and install into the groove located in the
lower torque shaft “through hole” of housing (1-10) - the inner most groove
nearest the yoke (1-20).
NOTE:
The cup of rod wiper seal will be installed facing into the housing.
3.2.6 Coat rod wiper (2-60) with lubricant and install into the outer most groove located
in the lower torque shaft “through hole” of housing (1-10).
NOTE:
The cup of rod wiper will be installed facing to the outside of housing (1-10).
3.2.7 Apply a generous amount of lubricant to the slots in the arms of yoke (1-20).
Coat yoke (1-20) with lubricant and install into housing (1-10).
3.2.8 Insert the yoke key (1-40) into the slot in the torque shaft (1-30).

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Section 3: Actuator Reassembly
Actuator Reassembly
3.2.9 Hold the yoke key (1-40) in position and insert the torque shaft (1-30) into and
through housing (1-10) and yoke (1-20).
3.2.10 Install thrust bearing (2-70) onto the upper area of torque shaft (1-30).
3.2.11 Install thrust washer (2-80) onto the upper area of torque shaft (1-30) on top of
thrust bearing (2-70).
NOTE:
A new retaining ring (2-90) is provided in the Bettis CBA Service Kit.
3.2.12 Install the new retaining ring (2-90) into the groove located on the upper area of
torque shaft (1-30).
CAUTION: VERIFY RETAINING RING
Verify that retaining ring (2-90) is properly seated in the groove of torque shaft (1-30).
3.2.13 Install position indicator (1-50) onto the top of torque shaft (1-30).
3.2.14 Rotate the torque shaft (1-30) so that the arms of yoke (1-20) point outward.
3.2.15 Coat O-ring seal (5-20) with lubricant and install into inner diameter seal groove
located in the center bar hole of housing adapter (6-10).
3.2.16 Install hex nut (8-20) onto one end of center bar (8-10).
3.2.17 Coat entire length of center bar assembly (8-10) with lubricant including the threads.
3.2.18 Insert center bar assembly (8-10) into the center hole of housing adapter (6-10).
Slide center bar assembly through housing adapter until center bar assembly nut is
ush against the housing adapter (6-10).
WARNING: DO NOT SCRATCH CENTER BAR ASSEMBLY
Care should be taken during installation of center bar assembly so as to not scratch it or
damage the housing adapter O-ring seal (5-20).
NOTE:
Rotate the hex nut down the M3 jackscrew until it is next to the M3 adapter.
3.2.19 Recoat center bar assembly (8-10) with lubricant.
3.2.20 Coat O-ring seal (7-10) with lubricant and install onto outer diameter ange
located on housing adapter end of housing (1-10).
NOTE:
The installation location for O-ring seal (7-10) is dened in step 3.1.6 under
Standard construction and Inverse construction actuators.
3.2.21 Install housing adapter (6-10), with installed center bar assembly (8-10), on to the
cylinder adapter end of housing (1-10).

Service Instructions
137462E Rev. D August 2015
15
Section 3: Actuator Reassembly
Actuator Reassembly
3�3 Pneumatic Cylinder Reassembly
NOTE:
Review Section 3 steps 3.1.1 through 3.1.6 before proceeding with cylinder reassembly.
In section 3.3 where the step indicates to "lubricate, coat or apply lubricant", use lubricant
as identied in Section 1 step 1.6 for lubricating the part being installed.
3.3.1 Coat one O-ring seal (5-10) with lubricant and install onto outer diameter ange
located on cylinder/cylinder adapter end of housing (1-10).
3.3.2 Actuators equipped with cylinder adapter (4-15), models CBA830-SR, CBA930-SR
and CBA1030-SR (including M3/M3HW models), do steps 3.3.2.1 and 3.3.2.2.
3.3.2.1 Install cylinder adapter (4-15) onto housing ange, with the stepped
outer diameter, of cylinder adapter (4-15), facing away from housing
(1-10).
3.3.2.2 Install one o-seal (5-15) onto stepped diameter of cylinder adapter (4-
15).
3.3.3 Coat all areas of piston (4-50) with lubricant.
3.3.4 Coat rod bushing (5-50) with lubricant and install into the internal rod bushing
groove located in the head of piston (4-50).
3.3.5 Coat rod T-seal (5-25) with lubricant and install in the internal seal groove in the
head of piston (4-50).
3.3.6 Coat piston seal (5-40) with lubricant and install into outer diameter seal groove of
piston (4-50).
3.3.7 Coat piston bearing (5-45) with lubricant and install into outer diameter bearing
groove of piston (4-50).
3.3.8 Install two bushings (4-80) onto piston assembly (4-50) - Refer to following
drawing (Figure 1).
Figure 1 Bushing Installation

August 2015
Service Instructions
137462E Rev. D
16
Section 3: Actuator Reassembly
Actuator Reassembly
3.3.9 With the piston head facing away from housing (1-10), install piston assembly
(4-50) onto center bar assembly (8-10).
3.3.10 Carefully slide piston assembly (4-50) along center bar assembly (8-10) until the
yoke pin engages the slots of yoke (1-20).
CAUTION: VERIFY BUSHINGS (4-80) ARE INSTALLED
Check to determine that both bushings (4-80) are installed between the arms of yoke
(1-20) and the piston assembly (4-50). Refer to Figure 1.
NOTE:
While holding the center bar assembly ush against the housing adapter (6-10), push
piston assembly (4-50) into housing (1-10) as far as the piston will travel.
3.3.11 Apply a coating of lubricant to entire bore of cylinder (4-10).
3.3.12 Cylinder (4-10) installation:
3.3.12.1 For CBA830, CBA930 and CBA1030 models (including M3/M3HW
models) install the lubricated cylinder (4-10) over the piston and up-
against the O-ring seal on the stepped diameter ange of cylinder
adapter (4-15).
3.3.12.2 For CBA730 models, install the lubricated cylinder (4-10) over the piston
and up against the O-ring seal on the ange of housing (1-10).
3.3.13 Coat O-ring seal (5-20) with lubricant and install into inner diameter seal groove
located in the center bar hole of end cap (4-20).
NOTE:
Actuators equipped with an end cap M3 jackscrew (4-30) pre-install M3 into end cap (4-20)
per step 3.3.14 and then install pre-assembled end cap into cylinder (4-10) per step 3.3.15.
Actuators equipped with housing adapter ES or stop screw (4-30) skip step 3.3.15 and
continue assembly at step 3.3.17.
3.3.14 M3 jackscrew installation to end cap (4-20).
3.3.14.1 Apply a coating of lubricant to outer diameter and inner diameter threads
of M3 jackscrew adapter (4-55).
3.3.14.2 Coat O-ring seal (5-65) with lubricant and install into outer diameter seal
groove located in the M3 jackscrew adapter (4-55).
3.3.14.3 Apply a light coating of lubricant to the threads of M3 jackscrew (4-30).
3.3.14.4 Install and rotate the M3 jackscrew (4-30) into M3 jackscrew adapter (4-55).
NOTE:
Rotate the M3 jackscrew into the adapter until the inboard end of the
jackscrew is up against the adapter.
3.3.14.5 Install M3 jackscrew adapter (4-55) with M3 jackscrew (4-30) into end
cap (4-20).