Emerson Process Management BETTIS G01 - Manual (Page 36)

Bettis P/N 124840E
Revision “B”
Page 32 of 46
5.1.3 Remove the cover plate (7-10) from spring cartridge assembly (5-10).
5.1.4 Apply pneumatic pressure to inner end cap (2-40) port “A” to compress the spring enough
to move the yoke off the stop screw on the spring module side of the drive module.
5.1.5 Loosen the stop screw nut (1-190) located on the stop screw that is closest to or next to
Spring Module.
5.1.6 Unscrew stop screw (1-180) that is closest to or next to Spring Module (unscrew or back
out until the load is removed from the stop screw).
5.1.7 Remove pneumatic pressure from pressure inlet port of inner end cap (3-10).
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.
5.1.8 The spring cartridge "pre-load" must be removed before spring cartridge assembly (5-10)
is removed from housing (1-10). Refer to steps 5.1.4 through 5.1.6 for spring cartridge
"pre-load" removal.
5.1.9 Remove breather assembly (12) from outer end cap (3-80) port “B”.
CAUTION: The maximum pressure to be applied in step 5.1.10 is 25 PSIG.
5.1.10 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.
5.1.11 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.
5.1.12 Remove hex cap screws (5-20) with lockwashers (5-30) from housing (1-10).
5.1.13 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.