Bettis P/N 127073E
Revision “A”
Page 26 of 37
CAUTION:
Due to the weight and size of spring cartridge assembly (5-10), heavy duty
support equipment will be required when removing spring cartridge
assembly from the actuator housing. Refer to section 6 for spring cartridge
module weights.
5.3.7
The spring cartridge "pre-load" must be removed before spring cartridge assembly (5-10)
is removed from housing (1-10). Refer to steps 5.3.4 through 5.3.6 for spring cartridge
"pre-load" removal.
5.3.8
Remove breather assembly (12) from outer end cap (3-80) port “B”.
CAUTION:
The maximum pressure to be applied in step 5.3.9 is 25 PSIG.
5.3.9
Apply pneumatic pressure, not to exceed the maximum as indicated in the above
“
CAUTION
”, to the pressure inlet port “B” of outer end cap (3-80) to move the spring
cartridge tension rod hex nut out of it's cast hex seat.
NOTE: If pneumatic pressure is not available to apply to the pressure inlet port “B” located in
outer end cap (3-80) then remove pipe plug (3-120) or if equipped with an extended stop
(ES) remove the ES. Using a long rod go through the outer end cap pipe plug or ES
vacant port hole and push on the piston rod so as to move the spring cartridge tension rod
hex nut out of it's cast hex seat.
5.3.10 Unscrew the spring cartridge tension rod from the Drive Module. The tension rod can be
rotated for removal by going through the open end of spring cartridge assembly with a
square male drive extension.
5.3.11 Remove hex cap screws (5-20) with lockwashers (5-30) from housing (1-10).
5.3.12 Remove spring cartridge assembly (5-10) from actuator housing (1-10).
WARNING:
Under no circumstances should the spring cartridge assembly (5-10) be cut
apart, as the spring is pre-loaded and the spring cartridge is a weld
assembly.
5.4
SPRING MODULE INSTALLATION
CAUTION:
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
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.
