Emerson Bettis G10 Series Operating instructions

Service Instructions
124842E Rev. C
October 2015
G01 through G10 Series Hydraulic Actuators
Double-Acting with M11 Hydraulic Override
Disassembly and Reassembly

Service Instructions
124842E Rev. C
Table of Contents
October 2015
ITable 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 Fluid Requirements ....................................................................................... 4
1.8 General Tool Information .............................................................................. 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 Hydraulic Power Module Disassembly ........................................................... 7
2.3 -H Hydraulic Override Module Disassembly ................................................... 8
2.4 Drive Module Disassembly ............................................................................ 9
Section 3: Actuator Reassembly
3.1 General Reassembly .................................................................................... 12
3.2 Drive Module Reassembly ........................................................................... 12
3.3 Hydraulic Power Module Reassembly .......................................................... 17
3.4 -H Hydraulic Override Module Reassembly.................................................. 19
3.5 Actuator Testing ......................................................................................... 21
Section 4: Field Conversions
4.1 Converting Double-Acting to Double-Acting with -H Hydraulic
Override Module ......................................................................................... 22
Section 5: Module/Component Removal and Installation
5.1 Spring Module Removal .............................................................................. 23
5.2 Hydraulic Power Module Installation ........................................................... 23
5.3 -H Hydraulic Override Module Removal....................................................... 24
5.4 -H Hydraulic Override Module Installation................................................... 25
5.5 G2 Through G10 Powr Swivl Module Removal ............................................. 26
5.6 G2 Through G10 Powr Swivl Module Installation ......................................... 26

Table of Contents
October 2015
Service Instructions
124842E Rev. C
II Table of Contents
Section 6: Actuator Support Information
6.1 Module Volume Table ................................................................................. 28
6.2 Module Weight Tables................................................................................. 28
6.3 G01 Tool Table ............................................................................................ 29
6.4 G2 Tool Table .............................................................................................. 30
6.5 G3 Tool Table .............................................................................................. 30
6.6 G4 Tool Table .............................................................................................. 31
6.7 G5 Tool Table .............................................................................................. 31
6.8 G7 Tool Table .............................................................................................. 32
6.9 G8 Tool Table .............................................................................................. 32
6.10 G10 Tool Table ............................................................................................ 33
Section 7: Troubleshooting
7.1 Fault Insertion ............................................................................................. 34
7.2 Operational Test.......................................................................................... 35
Section 8: Removal and Decommissioning
8.1 Removal and Decommissioning .................................................................. 36
Section 9: Document Revision ���������������������������������������������37
Appendix A: List of Tables ���������������������������������������������������38
Appendix B: List of Drawings ����������������������������������������������39

October 2015
Service Instructions
124842E Rev. C
1
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 G01X0X-M11, G2X0X-M11, G3X0X-M11, G4X0X-M11,
G5X0X-M11, G7X0X M11, G8X0X-M11, and G10X0X-M11 Double-Acting Series
Hydraulic Actuators with –H override module. NOTE: Actuator models may not
have a M11 override but may have a –H Hydraulic Override Module without
a –M11 Override System.
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
hydraulic pressure have 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 stop screw side of the housing (1-10) as a
reference and this side will be considered the front side of the actuator. The
housing cover (1-20) will be the top of the actuator.
1�1�8 Actuator module weights are listed in Section 6 Table 6.2.
1�1�9 When removing seals from seal grooves, use a commercial seal removing tool or a
small screwdriver with sharp corners rounded off.
1�1�10 Use a non-hardening thread sealant on all pipe threads.
CAUTION: FOLLOW MANUFACTURER'S INSTRUCTIONS
Apply the thread sealant per the manufacturer’s instructions.
1�1�11 Bettis recommends that disassembly of the actuator modules should be done in a
clean area on a work bench.

October 2015
Service Instructions
124842E Rev. C
2
Section 1: Introduction
Introduction
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 are provided to assist maintenance personnel in
carrying 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).
1�3 General Safety Information
1�3�1 Products supplied by Emerson, 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: READ WARNING MESSAGES CAREFULLY
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.
WARNING: FOLLOW PLANT 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 customers procedures the
differences should be resolved in writing between an authorized customers representative
and an authorized Bettis representative.

October 2015
Service Instructions
124842E Rev. C
3
Section 1: Introduction
Introduction
1�4 Bettis Reference Materials
1�4�1 Assembly drawing for G01 through G10 double-acting hydraulic series actuators
with -H cylinder use part number 115916
1�4�2 M11 manual hydraulic override system operating instructions part number
126858 with M11 assembly drawing part number 126567
1�4�3 M11-S manual hydraulic override system operating instructions part number
121960 with M11 S assembly drawing part number 121107
1�5 Service Support Items
1�5�1 Bettis Module Service Kits
1�5�2 For rod extension retainer nut tool, refer to the following table
NOTE:
These tools are required only when extension rod assembly (1-50) or (9-50) is removed or
when a new extension rod assembly is installed:
Table 1� Actuator Model and Part Number
ACTUATOR MODEL BETTIS PART
NUMBER ACTUATOR MODEL BETTIS PART NUMBER
G01 None required G5/G7 117369
G2 123616 G8/G10 117368
G3/G4 117370
1�5�3 Non-hardening thread sealant
1�6 Lubrication Requirements
NOTE:
Lubricants, other than listed in step 1.6.1, should not be used without prior written ap-
proval of Bettis Product Engineering.
1�6�1 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 or
cans, and they are marked ESL -4, 5 and 10 lubricant.

October 2015
Service Instructions
124842E Rev. C
4
Section 1: Introduction
Introduction
1�7 Fluid Requirements
1�7�1 For use in the hydraulic power module. The following listed uids are
recommended uids only and do not limit the use of other hydraulic uids
compatible with supplied seals and coatings.
1�7�1�1 Standard temperature service (-20°F to +350°F)/(-28.9°C to +176.6°C)
use Shell Tellus S2 V Grade 32 automatic transmission uid or an Emerson
approved uid.
1�7�1�2 High temperature service (0°F to +350°F)/(-17°C to +176.6°C) use
Shell Tellus S2 V Grade 32 automatic transmission uid or an Emerson
approved uid.
1�7�1�3 Low temperature service (-50°F to +150°F)/(-45.6°C to 65.6°C) use Mobil
Univis HVI 13 hydraulic uid or an emerson approved uid.
1�7�2 For use in the -H hydraulic override module and the M11 manual hydraulic
override system:
CAUTION: ONLY USE CORRECT FLUID
Hydraulic uid, other than listed in step 1.7.2.1 should not be used in the M11 Override or –H
Hydraulic Override Module without prior written approval of Bettis Product Engineering.
1�7�2�1 All temperature service (20°F to +350°F) / (-28.9°C to +176.6°C) use
Shell Tellus S2 V Grade 32 automatic transmission uid or an Emerson
approved uid.
1�8 General Tool Information
1�8�1 Tools: All tools/hexagons are American Standard inch. Large adjustable wrench,
two (2) large screwdrivers, Allen wrench set, set of open/box end wrenches, rubber
or leather mallet, torque wrench (up to 1600 foot pounds/1269 N-m), breaker bar,
and a drive socket set. For recommended tool and wrench sizes refer to Section 6
Tables 6.3 through 6.10.
1�9 Actuator Storage
For applications where the actuator is not put into immediate service it is recommended
that the actuator be cycled with 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. Also, actuators should not be
stored in an atmosphere harmful to resilient seals. For extended storage, contact factory.
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 guess work out of installation.

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Service Instructions
124842E Rev. C
5
Section 1: Introduction
Introduction
1�10�2 Actuators 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 on 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.
1�10�3 Good instrument practices are also recommended. Clean/dry regulated hydraulic
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, seals, etc.
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, setscrew(s) are installed and secured
2. No tubing damaged or accessories dislodged during shipping or
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 connections terminals are secure
4. Wiring as per enclosed diagram or service manual supplied
1�11�3 When actuator is rst put 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, exercising the seals, resulting in a service ready condition.

October 2015
Service Instructions
124842E Rev. C
6
Section 1: Introduction
Introduction
1�11�4 The actuator speed of operation is determined by a number of factors including:
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)
1�11�5 Due to the interaction of these variables, it is difcult to specify a "normal"
operating time. Faster operating times 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 times may be obtained 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.

October 2015
Service Instructions
124842E Rev. C
7
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.
2�1�1 Section 2 - actuator disassembly is written to either completely disassemble
the entire actuator or can be used to disassemble individual modules as needed
(hydraulic power module, -H hydraulic override module or drive module).
2�1�2 The hydraulic power module and the -H hydraulic override module can be
disassembled while still attached to the drive module, or they can be removed
from the drive module and disassembled separate to the actuator
(refer to Section 5 Module Removal and Installation).
NOTE:
Use a means of capturing the hydraulic uid that will be lost during the removal or
disassembly of the hydraulic power module or -H hydraulic override module. Use a bucket,
tub, large container, etc.
2�1�3 To ensure correct reassembly; that is, with hydraulic power module or -H hydraulic
override module on same end of drive module as was, mark or tag right (or left)
and mark mating surfaces.
2�2 Hydraulic Power Module Disassembly
NOTE:
Review Section 2 steps 2.1.1 through 2.1.3 general disassembly before proceeding with
hydraulic power module disassembly.
WARNING: DISCONNECT OPERATING PRESSURE
If not already removed disconnect all hydraulic pressure from actuator power cylinders.
2�2�1 Mark and record location of the ports on outer end cap (3-80) and inner end
cap (3-10).
2�2�2 Remove NPT pipe plug or optional SAE O-ring plug (3-120) from outer end cap
(3-80).
2�2�3 Remove hex nuts (3-90), with lockwashers (3-95), from tie bars (3-20).

October 2015
Service Instructions
124842E Rev. C
8
Section 2: Actuator Disassembly
Actuator Disassembly
2�2�4 Remove outer end cap (3-80) from cylinder (3-70) and tie bars (3-20).
2�2�5 Unscrew and remove tie bars (3-20) from inner end cap (3-10).
2�2�6 Remove cylinder (3-70) from inner end cap (3-10), piston (3-30) and piston rod
(3-40).
2�2�7 Refer to assembly drawing page 2 of 2 Detail "D". Remove two split ring halves
(3-50) and one retainer ring (3-60) from out board side of piston (3-30).
2�2�8 Remove piston (3-30) from piston rod (3-40).
2�2�9 Remove O-ring seal (4-70) from piston rod (3-40).
2�2�10 Refer to assembly drawing page 2 of 2 Detail "D". Remove two split rings (3-50) and
one retainer ring (3-60) from piston rod (3-40).
2�2�11 Remove hex cap screws (3-115) with lockwashers (3-110) from inner end cap (3-10).
2�2�12 Refer to assembly drawing page 2 of 2 Detail "F". Remove hex nuts (3-105) from
hex cap screws (3-100).
2�2�13 Remove hex cap screws (3-100) with lockwashers (3-110) from inner end cap
(3-10) and housing (1-10).
2�2�14 Remove inner end cap (3-10) off the piston rod (3-40).
NOTE:
The piston rod (3-40) removal as outlined in step 2.2.15 is only required when the piston
rod is being replaced or when the drive module is to be disassembled.
2�2�15 Unscrew and remove piston rod (3-40) from the drive module.
2�3 -H Hydraulic Override Module Disassembly
NOTE:
Review Section 2 steps 2.1.1 through 2.1.3 general disassembly before proceeding with –H
hydraulic override module disassembly.
WARNING: DISCONNECT PIPING
If not already removed disconnect piping from –H hydraulic override module.
2�3�1 Mark and record location of the ports on outer end cap (7-80) and inner end
cap (7-10).
2�3�2 Remove NPT pipe plug or optional SAE O-ring plug (7-120) from outer end cap (7-80).
2�3�3 Remove hex nuts (7-90), with lockwashers (7-95), from tie bars (7-20).
2�3�4 Remove outer end cap (7-80) from cylinder (7-70) and tie bars (7-20).
2�3�5 Unscrew and remove tie bars (7-20) from inner end cap (7-10).
2�3�6 Remove cylinder (7-70) from inner end cap (7-10), piston (7-30) and piston rod (7-40).
2�3�7 Refer to assembly drawing page 2 of 2 Detail "E". Remove two split ring halves
(7-50) and one retainer ring (7-60) from outboard side of piston (7-30).
2�3�8 Remove piston (7-30) from piston rod (7-40).

October 2015
Service Instructions
124842E Rev. C
9
Section 2: Actuator Disassembly
Actuator Disassembly
2�3�9 Remove O-ring seal (8-70) from piston rod (7-40).
2�3�10 Refer to assembly drawing page 2 of 2 Detail "E". Remove two split rings (7-50) and
one retainer ring (7-60) from piston rod (7-40).
2�3�11 Remove hex cap screws (7-115) with lockwashers (7-110) from inner end cap (7-10).
2�3�12 Refer to assembly drawing page 2 of 2 Detail "C". Remove hex nuts (7-105) from
hex cap screws (7-100).
2�3�13 Remove hex cap screws (7-100) with lockwashers (7-110) from inner end cap
(7-10) and housing (1-10).
2�3�14 Remove inner end cap (7-10) off the piston rod (7-40).
NOTE:
The piston rod (7-40) removal as outlined in step 2.3.15 is only required when the piston
rod is being replaced or when the drive module is to be disassembled.
2�3�15 Unscrew and remove piston rod (7-40) from drive module.
2�4 Drive Module Disassembly
NOTE:
Review Section 2 steps 2.1.1 through 2.1.3 general disassembly before proceeding with
drive module disassembly.
2�4�1 If not already removed remove piston rod (3-40) from drive module.
2�4�2 Mark stop screws (1-180) left and right. The setting of stop screws (1-180) should
be checked and setting recorded before stop screws are loosened or removed.
NOTE:
Stop screws will be removed later in this procedure. For steps 2.4.3 through 2.4.10 refer to
assembly drawing page 2 of 2 Section A-A and Detail “G”.
2�4�3 Before removing position indicator (1-220), record or mark its position.
Remove position indicator (1-220).
NOTE:
Step 2.4.4 is used only on G01, G2 and G3 drive modules. Drive modules G4 and G5 will
skip step 2.4.4 and continue with step 2.4.5.
2�4�4 Remove one vent check assembly (13) from top of housing cover (1-20).
2�4�5 Unscrew and remove hex cap screws (1-160) with lockwashers (1-170) from
yoke cover (1-150).
2�4�6 Remove yoke cover (1-150) from housing cover (1-20).
2�4�7 Mark and record the orientation of the position indicator assembly (1-140) in
relation to the top of yoke (1-70).

October 2015
Service Instructions
124842E Rev. C
10
Section 2: Actuator Disassembly
Actuator Disassembly
2�4�8 Remove position indicator assembly (1-140) from top of yoke (1-70).
2�4�9 Remove spring pin (1-100) from top of yoke (1-70).
2�4�10 Remove hex cap screws (1-110), with lockwashers (1-115) or with lockwashers
(1-170), from housing cover (1-20).
NOTE:
Steps 2.4.11 and 2.4.12 are used only on G7, G8 and G10 drive modules. Drive modules
G01, G2, G3, G4 and G5 will skip steps 2.4.11 and 2.4.12 and continue with step 2.4.13.
2�4�11 Remove hex cap screws (1-120), with lockwashers (1-115), from housing cover (1-20).
2�4�12 Using hex cap screws (1-110), install into holes vacated by hex cap screws (1-120).
Use these hex cap screws to jack the housing cover up for removal. Alternately rotate
the hex cap screw clockwise until housing cover (1-20) is clear of housing (1-10).
NOTE:
G01, G2, G3 and G4 model housing covers (1-20) will have cast tabs for placing prying tools
to aid in cover removal.
2�4�13 Remove housing cover (1-20) from housing (1-10).
NOTE:
Groove pins (1-130) will remain in housing cover (1-20) when housing cover is removed
from housing (1-10). Groove pins (1-130) should not be removed from housing cover
(1-20) unless they are damaged and require new replacements.
2�4�14 Refer to assembly drawing page 2 of 2 Detail "B". Remove guide bar (1-90) from
housing (1-10).
2�4�15 Remove top yoke pin thrust bearing (2-10) from the top of the yoke pin (1-80).
2�4�16 Rotate the arms of yoke (1-70) to the center position of housing (1-10).
2�4�17 Remove yoke (1-70) with yoke pin (1-80), guide block (1-30), two yoke/guide
block bushings (2-30) and extension rod assemblies (1-50) and (9-50), by lifting
yoke up and out of the housing (1-10).
2�4�18 Remove bottom yoke pin thrust bearing (2-10) from inside bottom of housing (1-10).
2�4�19 Remove yoke pin (1-80) by inserting 3/8" 16 UNC screw into top of the yoke pin
and pull straight up and out.
2�4�20 Remove guide block (1-30) from between the arms of yoke (1-70).
2�4�21 Remove yoke/guide block bushing (2-30) from top of guide block (1-30).
2�4�22 Remove yoke/guide block bushing (2-30) from the top of the lower yoke arm of
yoke (1-70).
NOTE:
For G01 model actuators skip steps 2.4.23 through 2.4.25 and continue disassembly at
step 2.4.26.

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Service Instructions
124842E Rev. C
11
Section 2: Actuator Disassembly
Actuator Disassembly
2�4�23 Refer to assembly drawing page 2 of 2 Detail "B". Use Bettis tool part numbers
117368 (G8/G10), 117369 (G5/G7), 117370 (G3/G4) or 123616 (G2) and remove
retention retainer nut assemblies (1-60) and (9-60) from guide block (1-30).
2�4�24 Remove rod extension assemblies (1-50) and (9-50) from guide block (1-30).
NOTE:
One spherical washer (1-40) and (9-40) will be removed from guide block (1-30) when
extension rod assemblies are removed.
2�4�25 Remove the remaining spherical washers (1-40) and (9-40) from guide block (1-30).
2�4�26 Unscrew and remove two stop screw nuts (1-190) from stop screws (1-180).
2�4�27 Unscrew and remove two stop screws (1-180) from housing (1-10).
2�4�28 Housing (1-10) vent check assembly removal as follows:
2�4�28�1 G01, G2 and G3 housings (1-10) unscrew and remove one vent check
assembly (13) from the front of housing (1-10).
2�4�28�2 G4 through G10 housing (1-10) unscrew and remove two vent check
assemblies (13) from the front of housing (1-10).
2�4�29 The following items do not need to be removed from their assembled locations
unless they are being replaced by new items: Two guide bar bearings, two yoke
bearings (2-40) and yoke pin bearing.

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Service Instructions
124842E Rev. C
12
Section 3: Actuator Reassembly
Actuator Reassembly
Section 3: Actuator Reassembly
3�1 General Reassembly
CAUTION: ONLY USE NEW SEALS
Only new seals, that are still within the seals' expectant shelf life, should be installed into
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
and piston rod must be free of deep scratches, pitting, corrosion and blistering or
aking coating.
CAUTION: REPLACE WORN PARTS
Actuator parts that reect any of the above-listed characteristics should be replaced with
new parts.
3�1�4 Before installation coat all moving parts with a complete lm of lubricant.
Coat all seals with a complete lm of lubricant, before installing into seal grooves.
NOTE:
The parts and seals used in the drive module will be assembled using lubricant as identied
in Section 1 step 1.6.1. Parts and seals used in the hydraulic power module will be assembled
using lubricant as identied in Section 1 step 1.7.1. Parts and seals used in the –H hydraulic
override module will be assembled using lubricant as identied in Section 1 step 1.7.2.
3�2 Drive Module Reassembly
NOTE:
Review Section 3.1 General Reassembly before proceeding with drive module reassembly.
NOTE:
Refer to assembly drawing page 2 of 2 Detail "B" for section drawing of guide block.
3�2�1 If guide bar bearings are being replaced install new bearings into guide block (1-30).

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Service Instructions
124842E Rev. C
13
Section 3: Actuator Reassembly
Actuator Reassembly
NOTE:
The guide bar bearing must be press tted into guide block guide bar bore with the seam
located ±5 degrees of the top or bottom centerline as shown in Section A-A.
NOTE:
For G01 model actuators skip steps 3.2.2 through 3.2.13 and continue disassembly at step
3.2.14.
3�2�2 Lubricate guide block (1-30), two spherical washers (1-40), and one extension rod
assembly (1-50).
3�2�3 Install one spherical washer (1-40) into the side of guide block (1-30).
NOTE:
The spherical side of washer (1-40) will be facing the outside of guide block (1-30).
3�2�4 Install second spherical washer (1-40) over threaded end of extension rod
assembly (1-50).
3�2�5 Install extension rod assembly (1-50) into guide block (1-30) and up against the
rst spherical washer (1-40).
3�2�6 Install extension retainer nut (1-60) over extension rod assembly (1-50) and screw
into guide block (1-30).
3�2�7 Tighten extension retainer nut assembly (1-60) until extension rod assembly (1-50)
cannot move. Back off the extension retainer nut assembly (1-60) just enough to
allow the extension rod assembly (1-50) to move freely.
3�2�8 Lubricate two spherical washers (9-40) and one extension rod assembly (9-50).
3�2�9 Install one spherical washer (9-40) into the side of guide block (1-30).
NOTE:
The spherical side of washer (9-40) will be facing the outside of guide block (1-30).
3�2�10 Install second spherical washer (9-40) over threaded end of extension rod
assembly (9-50).
NOTE:
The spherical side of the washer will go on the extension rod assembly facing the head of
the extension rod assembly.
3�2�11 Install extension rod assembly (9-50) into guide block (1-30) and up against the
rst spherical washer (9-40).
3�2�12 Install extension retainer nut (9-60) over extension rod assembly (9-50) and screw
into guide block (1-30).

October 2015
Service Instructions
124842E Rev. C
14
Section 3: Actuator Reassembly
Actuator Reassembly
3�2�13 Tighten extension retainer nut assembly (9-60) until extension rod assembly (9-
50) cannot move. Back off the extension retainer nut assembly (9-60) just enough
to allow the extension rod assembly (9-50) to move freely.
NOTE:
Consult Houston, Texas Bettis Service Coordinator for “yoke bearing, yoke pin bearing or
yoke/guide block bushing installation information".
3�2�14 If the two yoke bearings (2-40) are being replaced, install new bearing into housing
cover (1-20) and housing (1-10).
NOTE:
The yoke bearing (2-40) must be press tted into housing (1-10) and housing cover (1-20).
Install the yoke bearings with the bearing seam located 45 ±5 degrees from the yoke arm
slot when yoke (1-70) is rotated to its full clockwise position.
3�2�15 If the two yoke pin thrust bearings (2-10) are being replaced install new bearing
into housing cover (1-20) and housing (1-10).
3�2�16 Lubricate two yoke/guide block bushings (2-30) and install onto top and bottom
sides of guide block (1-30).
NOTE:
The guide block (1-30) should be already preassembled with extension rod assembly and
associated parts assembled in the guide block.
3�2�17 Install guide block (1-30), with yoke/guide block bushings (2-30), between arms of
yoke (1-70).
3�2�18 Install O-ring seal (2-50) into inner diameter O-ring groove in the bottom of
housing (1-10).
3�2�19 Coat the bearing surfaces of the yoke (1-70) with lubricant and install into
housing (1-10).
3�2�20 Align hole in guide block (1-30) with the matching holes in the two yoke/guide
block bushings (2-30) and the slots in the arms of yoke (1-70).
NOTE:
The yoke pin can be held in place by installing a screw into the .375 16 UNC tapped hole in
the upper end of yoke pin (1-80).
3�2�21 Install yoke pin (1-80) by inserting into the upper yoke arm, upper yoke/guide
block bushing, guide block, lower yoke/guide block bushing and lower yoke arm,
and resting on lower yoke pin thrust bearing (2-10).
3�2�22 Install guide bar (1-90) into either side of housing (1-10) by inserting through the
housing, through guide block and then insert the guide bar into the other side of
housing (1-10).

October 2015
Service Instructions
124842E Rev. C
15
Section 3: Actuator Reassembly
Actuator Reassembly
3�2�23 Refer to assembly drawing page 2 of 2 Section A-A. Install spring pin (1-100) into
the top of yoke (1-70).
3�2�24 Install position indicator assembly (1-140) onto the top of yoke (1-70) and over
spring pin (1-100).
NOTE:
Refer to Section 2 step 2.4.7 for correct installation position.
3�2�25 Install O-ring (2-50) into housing cover (1-20).
3�2�26 Install housing cover O-ring (2-60) into housing cover (1-20).
3�2�27 Install the housing cover (1-20), making sure not to damage O-ring seals (2-50)
and (2-60).
3�2�28 Place lockwashers (1-115) onto hex cap screws (1-110).
NOTE:
On G7 through G10 model actuators apply thread adhesive, Loctite 242, to threads of hex
cap screws (1-110). Reference assembly drawing note number 9.
3�2�29 Install hex cap screws (1-110) with lockwashers (1-115) through housing cover
(1-20) and into housing (1-10).
NOTE:
Leave hex cap screws (1-110) nger tight, do not tighten.
Do this step only if groove pins (1-130) have been pulled or if the pins are being replaced.
Drive groove pins (1-130) through housing cover (1-20) and into housing (1-10). The
groove pins should be ush with the cover.
3�2�30 Torque tighten hex cap screws (1-110) until a nal lubricated torque, as listed in
the following table, has been achieved.
Table 2� Housing Cover Screw Quantity and Torque
Model Qty TORQUE (±5%) Model Qty TORQUE (±5%)
Lbf-ft� N-m Lbf-ft� N-m
G01 4 40 54 G5 8 100 136
G2 6 40 54 G7 8 100 136
G3 8 40 54 G8 12 100 136
G4 8 40 54 G10 16 100 136
NOTE:
Complete step 3.2.32 on G5, through G10 model actuators. For G01 through G4 model
actuators skip step 3.2.32 and proceed to step 3.2.33.

October 2015
Service Instructions
124842E Rev. C
16
Section 3: Actuator Reassembly
Actuator Reassembly
3�2�31 On G5 through G10 models
3�2�31�1 Place lockwashers (1-115) onto hex cap screws (1-120).
NOTE:
Hex cap screws (1-120) are only used as "hole" llers and serve to protect threads from
environment.
3�2�32 Install and tighten hex cap screws (1-120) with lockwashers (1-115).
3�2�33 Install thrust bearing (2-110) onto position indicator (1-140).
3�2�34 Install O-ring seal (2-100) onto position indicator (1-140).
3�2�35 Install upper bearing (2-120) into yoke cover (1-150).
3�2�36 Install rod wiper (2-80) into yoke cover (1-150).
3�2�37 Install O-ring seal (2-70) into yoke cover (1-150).
3�2�38 Install yoke cover (1-150) onto housing cover (1-20) and over position indicator
assembly (1-140).
NOTE:
During yoke cover installation be careful not to damage O-ring seal (2-70) and rod wiper (2-80).
3�2�39 Place lockwashers (1-170) onto hex cap screws (1-160).
3�2�40 Install and tighten hex cap screws (1-160) with lockwashers through yoke cover
(1-150) and into housing cover (1-20).
3�2�41 Vent check assembly installation as follows:
3�2�41�1 For G01, G2 and G3 housing (1-10) using pipe sealant install one vent
check assembly (13) into the front of housing (1-10).
3�2�41�2 For G01, G2 and G3 housing cover (1-20) using pipe sealant install one
vent check assembly (13) into the top area of housing cover (1-20).
3�2�41�3 For G4 through G10 housing (1-10) using pipe sealant install two vent
check assemblies (13) into the front of housing (1-10).
NOTE:
Refer to Section 2 step 2.4.3 for correct position indicator placement. Install position indi-
cator (1-220) over the exposed shaft of position indicator assembly (1-140).
3�2�42 Install stop screw nuts (1-190) onto stop screws (1-180).
3�2�43 Install O-ring seals (2-90) onto stop screws (1-180).
3�2�44 Install two stop screws (1-180) into two stop screw holes on the front of
housing (1-10).
3�2�45 Adjust both stop screws (1-180) back to settings recorded earlier in Section 2 at
step 2.4.2.
3�2�46 Tighten both stop screw nuts (1-190) securely.