December 2020
Installation, Operation and Maintenance Manual
VA-DC-000-1878 Rev. 0
8
Section 2: Actuator Disassembly
Actuator Disassembly
2.2 Pneumatic Power Module Disassembly
NOTE:
Review Section 2, steps 2.1.1 through 2.1.5 General Disassembly before proceeding with
Pneumatic Power Module Disassembly. Refer to drawings VA121410 or VA121411 for details.
!
WARNING
Remove all operating pressure. If not already removed disconnect all operating pressure
from actuator power cylinders.
!
WARNING
Springs in extended position. The spring cartridge must be checked to verify that
the spring(s) are in their extended position before the pneumatic power module is
disassembled from the drive module (refer to Section 5.3, steps 5.3.7 through 5.3.9).
2.2.1 Mark and record location of the ports on outer end cap (3 - 80) and inner
end cap (3 - 10).
2.2.2 If actuator is equipped with a power module mounted extended stop (ES) then
rotate the ES until clear of the piston rod (3 - 40).
2.2.3 Remove breather assembly (12) from outer end cap (3 - 80).
2.2.4 Refer to assembly drawing sheet 2 Detail "E". Remove two socket cap screws
(3 - 130), with lock washer (3 - 140), from outer end cap (3 - 80).
2.2.5 Remove two tie bar hex nuts (3 - 90) from outboard side of outer end cap (3 - 80).
2.2.6 The t between cylinder (3 - 70) and outer end cap (3 - 80) is very tight. Break end
cap free by tapping with a breaker bar on lip provided on the end cap. Remove
outer end cap (3 - 80) from cylinder (3 - 70).
!
CAUTION
Do not damage O-ring groove when removing end cap from cylinder.
NOTE:
When removing cylinder (3 - 70) off piston (3 - 30), tilt the cylinder 15 to 30 degrees with
respect to actuator centerline.
2.2.7 Remove cylinder (3 - 70) from inner end cap (3 - 10).
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