Bettis P/N 126858
Revision "F"
Page 3 of 15
2.2.2
M11 Manual Hydraulic Operation as follows:
2.2.2.1 Double Acting Actuators - Select actuator rotation desired by placing the control
knob (20-320) in the Manual CW or Manual CCW position.
2.2.2.2 Spring Return Actuators - Place the control knob (20-320) in the Manual position.
2.2.3
Operate the M11 pump handle until required valve position is reached.
NOTE: When the actuator is fully stroked against the travel stops, an increased resistance in
pumping effort will be noted. Continued operation of the pump simply circulates fluid
through a relief valve.
SECTION 3 - M11 SYSTEM FLUID FILLING INSTRUCTIONS
3.1
DOUBLE ACTING ACTUATOR M11 SYSTEM FLUID FILLING - Use either Refilling Method
Number 1 (steps 3.1.2) or Refilling Method Number 2 (steps 3.1.3). Method number 1 is the best,
most efficient and the recommended method.
3.1.1
Actuator position as follows:
3.1.1.2 Pneumatic and Hydraulic T series actuators: Apply pneumatic or hydraulic
pressure to the inlet port located in the outer end cap of the actuators power
cylinder, placing the actuator in the counter clockwise (CCW) position and proceed
to step 3.1.2.
3.1.1.3 Hydraulic G series actuators: Apply pneumatic or hydraulic pressure to the inlet
port located in the outer end cap of the actuators power module (cylinder), placing
the actuator in the counter clockwise (CCW) position and proceed to step 3.1.2.
3.1.1.4 Pneumatic G and HD series actuators: Apply pneumatic pressure to the inlet port
located in the outer end cap of the actuators power module (cylinder), placing the
actuator in the clockwise (CW) position and proceed to step 3.1.2.
3.1.2
REFILLING METHOD NUMBER 1. - Refilling of the M11 Manual Hydraulic Override
System is best accomplished using a pressure pump.
NOTE: If a pressure pump is not available go to step 3.1.3 (method number 2) for the manual field
service refilling procedure.
3.1.2.1 Shut off and exhaust the operating media from the actuator’s power cylinder.
