April 2021
Installation, Operation and Maintenance Manual
VA-DC-000-1879 Rev. 0
8
Section 3: M18 System Fluid Filling Instructions
M18 System Fluid Filling Instructions
3.2
Spring-Return Actuators M18 System
Fluid Filling
Actuator position as follows:
Apply air to port on power module inner end cap move the actuator to opposition direction
and compress the spring. Apply air to port on the outer end cap of hydraulic override
cylinder to extend the ram.
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.
For sizes G01 to G5, T, HD series
3.2.1 Refilling Method Number 1
Refilling of the M18 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.
3.2.1.1.2
HD and T-Series – Remove the pipe plugs from the actuator
hydraulic override cylinder outer and inner end.
NOTE:
Only remove the pipe plugs located at the highest points, in the vertical plane, of the
hydraulic override cylinder.
3.2.1.2
Connect the pump motor hose to fitting hole located on the reservoir
top end cap (10 - 10), keep pipe plug on the other hole.
3.2.1.3
Place the M18 pump control knob in the “Auto” position.
NOTE:
The pressure pump should not exceed 20 psi when force filling the M18 hydraulic system.