Emerson Bettis G Series - Page 30

December 2020
Installation, Operation and Maintenance Manual
VA-DC-000-1878 Rev. 0
26
Section 3: Actuator Reassembly
Actuator Reassembly
3.4.10 Install two split ring halves (3-50) into the piston rod, behind the piston and retain
with retainer ring (3-60).
3.4.11 Coat two tie bars (3-20) with lubricant and install by carefully pushing tie bars
through piston (3-30) and rod T-seal (4-50).
3.4.12 Install two tie bar O-ring seals (4-80) onto the inboard end of tie bars (3-20) and
into the O-ring grooves provided.
3.4.13 Insert the tie bars through inner end cap (3-10) and screw hex nuts (3-90) onto
inboard end of the tie bars.
NOTE:
Screw the tie bars through the hex nuts (3 - 90) until one complete thread is exposed.
3.4.14 Refer to assembly drawing page 2 of 2 Detail "E". Install two tie bar O-ring
seals (4 - 80) onto the outboard end of tie bars (3 - 20) and into the O-ring
grooves provided.
3.4.15 Apply lubricant to one O-ring seal (4 - 40) and install into the outer diameter
O-ring groove of outer end cap (3 - 80).
3.4.16 Apply lubricant to the bore of cylinder (3 - 70).
3.4.17 Install lubricated cylinder (3 - 70) over piston (3 - 30) and onto inner end cap (3 - 10).
When installing the cylinder over the piston seal tilt cylinder 15 to 30 degrees to
piston rod.
!
CAUTION
Carefully install cylinder. If needed, when installing the cylinder, hammer on the end of the
cylinder only with a nonmetallic object.
3.4.18 Install outer end cap (3 - 80) over tie bars (3 - 20) and into cylinder (3 - 70).
NOTE:
The pressure inlet port should be positioned in the same position as recorded in
Section 2.2, step 2.2.1.
3.4.19 Install tie bar nuts (3 - 90) onto tie bars (3 - 20). Torque tighten tie bar nuts,
alternately in 100 lb-ft increments, until a nal lubricated torque, as listed in the
following Table, has been achieved.
Table 5. G2 Tie Bar Nuts
Housing
Model
Torque (±5%)
Housing
Model
Torque (±5%)
lb-ft Nm lb-ft Nm
G2 120 163 G3 150 203