Bettis P/N 126858
Revision "F"
Page 5 of 15
3.1.2.2 Remove the bleed plugs from the following locations:
NOTE: Only remove the pipe plugs located at the highest points, in the vertical plane, of
the hydraulic override cylinder.
3.1.2.2.1
G Series Actuators remove o-ring plug from the top of the outer
and inner end caps.
3.1.2.2.2
T Series Actuators remove pipe plugs from the top area located on
the outer and inner end of the hydraulic override cylinder.
3.1.2.2.3
HD Series Actuators remove pipe plug from the top area on the
outer end of the hydraulic override cylinder and the cylinder
adapter.
3.1.3.3 Place the M11 pump selector knob in the “Manual” position.
CAUTION: Never allow the M11 reservoir to be pumped dry of hydraulic fluid.
3.1.3.4 Fill reservoir to 1-1/2 inches from top of reservoir end cap (10-10). Note: Add fluid
to the reservoir through the open port left vacant in step 3.1.3.1.
3.1.3.5 Start pumping the hydraulic fluid into the system with the M11 pump handle.
3.1.3.6 Stop pumping the M11 pump handle when hydraulic fluid appears at both vacant
pipe plug ports located in the actuator’s hydraulic override cylinder.
3.1.3.7 Apply pipe dope onto pipe plug threads and install into the vacant pipe plug ports at
both vacant pipe plug ports located in the actuator’s hydraulic override cylinder.
3.1.3.8 Fill the M11 reservoir 1-1/2 inches from the top of the reservoir.
3.1.3.9 Apply pipe dope to the breather (10-140) threads and install into the port on top of
the reservoir upper end cap (10-10).
3.2
SPRING RETURN ACTUATORS M11 SYSTEM FLUID FILLING - Use either Refilling Method
Number 1 (steps 3.2.1) or Refilling Method Number 2 (steps 3.2.2). NOTE: Method Number 1 is the
best, most efficient and the recommended method.
3.2.1
REFILLING METHOD NUMBER 1. - Refilling of the M11 Manual Hydraulic Override
System is best accomplished using a pump motor.
NOTE: If a pump motor is not available go to step 3.2.2 (Method number 2) for the manual field
service refilling procedure.
3.2.1.1 Actuator hydraulic override cylinder pipe plug removal.
3.2.1.1.1
G-Series – Remove one pipe plug from the spring cartridge
hydraulic override outer end cap.
