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Bettis P/N 124840E
Revision “B”
Page 22 of 46
3.3.25 Install lockwashers (3-140) onto socket cap screws (3-130).
3.3.26 Install and tighten socket cap screws (3-130), with lockwashers (3-140), into outer end cap
(3-80).
NOTE: If the outer end cap (3-80) has an ES stop screw completed steps 3.3.27 through 3.3.29.
3.3.27 If not already removed then remove hex nut (3-190) and old o-ring seal (4-100).
3.3.28 Install new o-ring seal (4-100) onto the ES stop screw and up against outer end cap (3-80).
3.3.29 Install hex nut (3-140) on to ES. After adjusting to proper position tighten ES stop screw.
NOTE: Step 3.3.30 is not required if the Power Module is equipped with an ES stop screw or a M3
jackscrew.
3.3.30 If removed, using pipe dope, install pipe plug (3-120) into outer end cap (3-80).
3.3.31 Apply sufficient pneumatic pressure to outer end cap (3-80) pressure inlet port to move the
piston to its full inboard position(next to inner end cap).
3.3.32 Remove pneumatic pressure from outer end cap (3-80).
3.3.33 Install breather assembly (12) in outer end cap (3-80).
NOTE: Individual actuators may not have reducer bushing (14) depending on port and breather
size.
3.4 G2 AND G3 EARLY MODEL PNEUMATIC POWER MODULE REASSEMBLY
NOTES: 1. Early G2 and G3 pneumatic power modules where equipped with tie bars
that had nuts on both ends of the tie bars (3-20) – double nuts.
2. Refer to Section 2 step 2.1.4 for the correct installation location for piston
rod (3-40).
3. THE ACTUATOR MUST BE IN THE APPROPRIATE OVERTRAVEL
POSITION. Confirm over-travel position by observing the guide block
(1-30) is against the inner wall of housing (1-10).
3.4.1 Refer to assembly drawing page 2 of 2 Detail "C". Install one rod wiper (4-10) into inner
end cap (3-10).
3.4.2 Install one rod bushing (4-20) into inner end cap (3-10).
3.4.3 Coat one Polypak seal (4-30) with lubricant and install, lip first, into inner end cap (3-10).
CAUTION: Install the Polypak seal with energizer ring facing outboard side of inner end
cap (3-10).