October 2015
Service Instructions
124842E Rev. C
1
Section 1: Introduction
Introduction
Section 1: Introduction
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General Service Information
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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.
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Normal recommended service interval for this actuator series is five years.
NOTE:
Storage time is counted as part of the service interval.
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This procedure is applicable with the understanding that all electrical power and
hydraulic pressure have been removed from the actuator.
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Remove all piping and mounted accessories that will interfere with the module(s)
that are to be worked on.
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This procedure should only be implemented by a technically competent technician
who should take care to observe good workmanship practices.
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Numbers in parentheses ( ) indicate the bubble number (reference number) used
on the Bettis assembly drawing and actuator parts list.
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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.
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Actuator module weights are listed in Section 6 Table 6.2.
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When removing seals from seal grooves, use a commercial seal removing tool or a
small screwdriver with sharp corners rounded off.
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Use a non-hardening thread sealant on all pipe threads.
CAUTION: FOLLOW MANUFACTURER'S INSTRUCTIONS
Apply the thread sealant per the manufacturer’s instructions.
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Bettis recommends that disassembly of the actuator modules should be done in a
clean area on a work bench.
