Bettis P/N 126858
Revision "F"
Page 1 of 15
SECTION 1 - INTRODUCTION
1.1
GENERAL M11 SERVICE INFORMATION
1.1.1
M11 is a compact modular hydraulic override system designed for use with Bettis Double
Acting and Spring Return Actuators. The system incorporates a piston type hand pump
and a fluid reservoir. NOTE: The M11 fluid reservoir is required because of the hydraulic
cylinder differential, which is due to the inboard piston rod displacement.
1.1.2
MAINTENANCE:
1.1.2.1 Bettis does not recommend periodic field maintenance for the M11 Manual
Hydraulic Override System (pump and reservoir).
1.1.2.2 The only time the M11 Manual Hydraulic Override System should be disassembled
is when either the pump or the reservoir fails to perform its manual hydraulic
override function
1.1.2.3 When possible the M11 package should be returned to the factory for
maintenance.
1.1.3
Numbers in parentheses ( ), indicate the bubble number (reference number) used on the
Bettis Assembly Drawing.
WARNING:
Do not use Teflon tape on M11 system threads.
1.1.4
Use a non-hardening thread sealant on all system threads.
CAUTION:
Apply thread sealant per the manufacture's instructions.
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.
1.3
GENERAL SAFETY INFORMATION 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 a well trained, equipped, prepared and competent technician.
WARNING:
For the protection of personnel working on Bettis actuators, this procedure
should be reviewed and implemented for safe operation. Close attention
should be noted to the WARNINGS, CAUTIONS and NOTES contained in this
procedure.
