Section 4: Actuator Testing; Actuator Testing - Emerson CBA730 Disassembly And Reassembly

Service Instructions
137462E Rev. D

Section 4: Actuator Testing

4�1

Actuator Testing

4.1.1
4.1.2
WARNING: FOLLOW SERIAL TAG INFORMATION
Pressure is not to exceed the maximum operating pressure rating listed on the serial
number tag (20).
4.1.3
NOTE:
When testing the actuator, use a proper adjusted regulator to apply pressure to the
actuator.
4.1.4
4.1.5
4.1.6
4.1.7
Actuator Testing
Leak Test - General - A small amount of leakage may be tolerated. Generally, a
small bubble which breaks about three seconds after starting to form is considered
acceptable.
All areas, where leakage to atmosphere may occur, are to be checked using a
commercial leak testing solution.
All leak testing will use the customer's normal operating pressure or the actuator
name tag normal operating pressure (NOP).
Before testing for leaks, apply and release the pressure listed in step 4.1.3 to both
sides of the piston. Repeat this cycle approximately five times. This will allow the
new seals to seek their service condition.
Apply the pressure listed in step 4.1.3 to the housing side of the piston and allow
the actuator to stabilize.
Apply a leak testing solution to the following areas:
4.1.6.1 Cylinder to housing joint on CBA730 or cylinder to cylinder adapter to
housing joints on CBA830, CBA930 and CBA1030 actuator models.
4.1.6.2 On the outboard end of housing adapter (6-10) at the center bar hex nut.
Checks the center bar to housing O-ring seal (5-20).
4.1.6.3 Housing adapter stop screw / ES / M3 jackscrew O-ring seal (7-30).
4.1.6.4 Torque shaft (1-30) to housing (1-10) interface. Checks rod wiper seals
(2-20).
4.1.6.5 End cap (4-20) port "hole". Checks the piston to cylinder seal (5-40) and
piston to center bar seal (5-25).
4.1.6.6 Housing adapter (6-10) to housing (1-10) joint. Check O-ring seal (7-10).
Apply the pressure listed in step 4.1.3 to the end cap inlet port and allow the
actuator to stabilize.
Section 4: Actuator Testing
August 2015
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