Emerson Bettis G Series - 5.5 Pneumatic Power Module Removal

December 2020
Installation, Operation and Maintenance Manual
VA-DC-000-1878 Rev. 0
38
Section 5: Module Removal and Installation
Module Removal and Installation
5.4.12 G7 through G10 M18 Override Cylinder installation.
5.4.12.1 Insert M18 Hydraulic Override Cylinder assembly into spring cartridge
outer end.
5.4.12.2 Install lock washers (7 - 80) on to eight hex cap screws (7 - 100).
5.4.12.3 Install eight hex cap screws (7 - 100) with lock washers (7 - 90) through
end cap (7 - 70) and into outer end of spring cartridge (5 - 10).
5.4.13 Torque tighten hex cap screws (7 - 100) and (7 - 80), alternately until a nal
lubricated torque, as listed in the following Table, has been achieved.
Table 10. M18 Override Cylinder End Cap to SR Cartridge Screw Torque
Housing
Model
Torque (±5%)
Housing
Model
Torque (±5%)
lb-ft Nm lb-ft Nm
G01 16 21.68 G5 40 54.2
G2 16 21.68 G7 80 108.4
G3 16 21.68 G8 130 176.15
G4 40 54.2 G10 190 257.45
5.4.14 Using pipe dope on threads reinstall all piping between hydraulic override cylinder
assembly and the M18 pump.
5.4.15 Fluid lling instructions for M18 and M18-S Hydraulic Override Systems:
5.4.15.1 To uid ll M18 Manual Hydraulic Override System refer to instructions
part number 126858.
5.4.15.2 To uid ll M18-S Manual Hydraulic Override System refer to instructions
part number 121960.
5.4.16 If removed install stop screw nuts (1 - 190) onto stop screws (1 - 180).
5.4.17 If removed install O-ring (2 - 90) onto stop screws (1 - 180).
5.4.18 If removed install two stop screws (1 - 180) into two stop screw holes on the front
of housing (1 - 10).
5.4.19 Adjust both stop screws (1 - 180) back to settings recorded earlier in Section 5.
5.4.20 Tighten both stop screw nuts (1 - 190) securely.
5.5 Pneumatic Power Module Removal
!
CAUTION
Use heavy duty support equipment. Due to the weight and size of power module, heavy
duty support equipment will be required when removing power module from the actuator
housing. Refer to Section 6 for Pneumatic Power Module Weights.
5.5.1 Remove pipe plug (3 - 120) from outer end cap (3 - 80).
5.5.2 Remove hex cap screws (3 - 100) with lock washers (3 - 110) from housing (1 - 10).
5.5.3 Using a male square drive extension, go through outer end cap (3 - 80) and
unscrew piston rod (3 - 40) from extension rod assembly (1 - 50).