Bettis P/N 137462E
Revision
"A”
Page 13 of 18
3.3.14.8 Install hex nut (4-40) onto M3 jackscrew (4-30). NOTE: Rotate the hex nut
down the M3 jackscrew until it is next to the M3 jackscrew adapter.
3.3.15 End cap outer diameter seal installation.
3.3.15.1 For CBA830 CBA930 and CBA1030 models install o-ring seal (5-15) onto the
outer diameter of end cap (4-20).
3.3.15.2 For CBA730 models install o-ring seal (5-10) onto the outer diameter of end cap
(4-20).
3.3.16 Install end cap (4-20) onto center bar (8-10) and into cylinder (4-10). Position the end
cap (4-20) so that the inlet port is at the bottom and the ES, cylinder stop screw or M3
jackscrew (4-30) is at the top of the actuator.
WARNING:
If step 3.3.17 is not completed as described the center bar o-ring seals
(5-20) may become a source of pressure leakage and cause the actuator to
fail.
3.3.17 Install the second hex nut (8-20) onto the cylinder end of center bar (8-10). Adjust the
two hex nuts (8-20) such that the approximate same number of threads is exposed on
the ends of the center bar (8-10).
WARNING: Do not allow end cap (4-20) to rotate during center bar tightening. The
end cap must maintain the position as described in step 3.3.16. M3
jackscrew must be installed to be in alignment with the target located on
the piston assembly (4-50). If the M3 does not contact the target during M3
adjustments the groove pin (12-20) is subject to failure.
3.3.18 Torque tighten center bar assembly (8-10) to 233 foot pounds / 316 N-m.
3.3.19 End Cap (4-20) ES or stop screw (4-30) installation.
3.3.19.1 Lubricate ES or stop screw (4-30) and install into end cap (4-20).
3.3.19.2 Install o-ring seal (5-30) onto ES or stop screw (4-30). NOTE: Move the o-ring
seal (5-30) down the ES or stop screw until it is next to the end cap (4-20).
3.3.19.3 Install washer (4-90) onto ES or stop screw (4-30). NOTE: Push the washer
down the ES or stop screw until it is next to the end cap (4-20).
3.3.19.4 Install hex nut (4-40) onto ES or stop screw (4-30). NOTE: Rotate the hex nut
down the ES or stop screw until it is next to the end cap (4-20).
3.3.20 M3 hex drive hub or handwheel (12-10) installation as follows:
3.3.20.1 Install hex drive hub (12-10) or handwheel (12-10) onto M3 jackscrews (4-30)
and (6-30). Align the “hole” of the drive hub with the “hole” located in the
outboard end of M3 jackscrew (4-30) and (6-30).
