December 2020
Installation, Operation and Maintenance Manual
VA-DC-000-1878 Rev. 0
36
Section 5: Module Removal and Installation
Module Removal and Installation
5.4
Spring Module Installation
!
CAUTION
Use heavy duty support equipment. Due to the weight and size of spring module, heavy
duty support equipment will be required when installing spring cartridge module to the
actuator housing. For the approximate weight of the spring cartridge refer to Section 6.
!
WARNING
Verify overtravel position. Actuator must be in the appropriate overtravel position
(see detail “A” on warning tag attached to spring module access hole cover or to Bettis
drawing part number 123650). Confirm overtravel position by observing the guide block
(1 - 30) is against the inner wall of housing (1 - 10).
NOTE:
The setting of stop screws (1 - 180) should be checked and setting recorded before stop
screws are loosened or removed.
5.4.1
On stop screw (1 - 180), that is located on the same side of the housing as spring
cartridge (5 - 10), loosen stop screw nut (1 - 190).
5.4.2
Unscrew or back out stop screw (1 - 180) to achieve over-travel as illustrated
in detail “A” on warning tag attached to spring module cover plate or to Bettis
drawing part number 123650.
5.4.3
Install O-ring seal (6 - 20) into the O-ring groove in the inboard end of spring
cartridge assembly (5 - 10).
5.4.4
Using lifting equipment move spring module up to housing (1 - 10) and align
spring cartridge tension rod with extension rod assembly (9 - 50).
!
WARNING
Complete step 5.4.5 to avoid severe injury to personnel or incur major damage to
the actuator.
5.4.5
Spring cartridge tension rod to rod extension installation as follows:
5.4.5.1
Using a male square drive extension, go through the open end of
spring module (5 - 10) and rotate the tension rod nut until initial thread
engagement is achieved.
NOTE:
Confirm initial thread engagement of rod extension (9-50) to tension rod.
