Section 4: Actuator Testing; Actuator Testing - Emerson Bettis CBA*30-SR series Service Instructions Manual

Section 4: Actuator Testing

August 2015
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
16
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 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 the
housing side 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 Spring cylinder to housing joint on CBA730-SR or spring cylinder to cylinder
adapter to housing joints on CBA830-SR, CBA930-SR, and CBA1030-SR
actuators.
4.1.6.2 On the out board end of housing (6-10) at the center bar assembly nut.
Checks the center bar to housing O-ring seal (5-20).
4.1.6.3 On the out board end of housing (1-10) at the joint of the housing (1-
10) and the housing adapter (6-10). Checks the O-ring seal sealing the
housing flange to the housing adapter.
4.1.6.4 At the joint between housing adapter (6-10), M3 jackscrew / ES / stop screw
(6-30) and hex nut (6-40). Checks M3 jackscrew / ES / stop screw O-ring seal
(7-30) and O-ring seal (7-65) when actuator has a housing adapter M3
jackscrew.
4.1.6.5 Both torque shaft (1-30) to housing (1-10) interfaces. Checks wiper seal
(2-20), O-ring seal (2-40) and rod wiper (2-60).
4.1.6.6 End cap (4-20) breather (30) port hole. Checks the piston to cylinder seal
(5-40) and piston to center bar seal (5-25).
4.1.6.7 Remove pressure from pressure inlet port in the housing (1-10).
Service Instructions
137463E Rev. D
Actuator Testing