Emerson CBA730 - Pneumatic Cylinder Disassembly

August 2015
Service Instructions
137462E Rev. D
8
Section 2: Actuator Disassembly
Actuator Disassembly
2�2 Pneumatic Cylinder Disassembly
NOTE:
Review Section 2 steps 2.1.1 through 2.1.3 before proceeding with cylinder disassembly.
2.2.1 Remove hex nut (4-40) as follows: CBA730 through CBA1030 standard end cap
stop screw or extended stop (ES), use step 2.2.1.1. CBA730 through CBA1030 with
-M3 or -M3HW use step 2.2.1.2.
2.2.1.1 CBA730 through CBA1030 end cap stop screw or extended stop screw
(ES)
2.2.1.1.1 Loosen and remove hex nut (4-40) and washer (4-90) from stop
screw (4-30) located in end cap (4-20).
2.2.1.1.2 Remove stop screw (4-30) from the end cap (4-20).
2.2.1.2 CBA730 through CBA1030-M3 or -M3HW
2.2.1.2.1 Remove retainer ring (12-30) and groove pin (12-20) from
optional hex drive hub or from hand wheel (12-10).
2.2.1.2.2 Remove optional hex drive hub or hand wheel (12-10) from M3
jackscrew (4-30).
2.2.1.2.3 Remove caution tag (12-40) from M3 jackscrew (4-30).
2.2.1.2.4 Loosen and remove hex nut (4-40) from M3 jackscrew (4-30).
NOTE:
For CBA730 through CBA1030-M3 or M3HW models, the M3 jackscrew (4-30)
cannot be removed now. The M3 used in these models can be removed later in this
procedure using step 2.2.7.
2.2.2 Remove housing side hex nut (8-20) from center bar (8-10).
2.2.3 Remove outer end cap (4-20) from outboard end of cylinder (4-10).
NOTE:
ES (4-30) or stop screw (4-30) does not require removal from end cap (4-20) unless
replacing with a new ES or stop screw.
2.2.4 Slide cylinder (4-10) over piston (4-50) and remove.
2.2.5 Remove piston (4-50) from center bar (8-10).
NOTE:
The standard non-M3 piston (4-50) is an assembly made up of one roll pin and one yoke
pin; do not attempt to disassemble the piston assembly. The M3 piston (4-50) has two
targets and four drive screws in addition to the roll pin and yoke pin.