PURPOSE
The purpose of these instructions is to provide
a step-by-step method for replacing the Beck
Group 22 CPS-4 switch assembly. The switch
assembly is a subassembly of the control end and the
switches are preset; no adjustment of the switch arms is
necessary. The assembly is not user-serviceable and
should not be disassembled in the field. Components
of the switch assembly are listed in Table 1.
The switch assembly is located in the control end on
the rear face of the actuator beneath the Handswitch.
REQUIRED TOOLS
The following tools will be needed:
1/2” socket wrench
Cross-tipped screwdriver
Multimeter
Torque wrenches appropriate for 12 lb-in (1.4 N•m)
and 10 lb-ft (14 N•m)
Scotch™ 847 gasket adhesive or equivalent
Grounding strap
3/16” flat-tipped screwdriver
WARNING
WARNING
Electrical shock hazard—disconnect
power before proceeding. Remove the
actuator from line voltage and shut off
any external power sources feeding the
auxiliary switches.
PROCEDURE
Refer to Figure 1 for component identification.
Remove the old switch assembly:
1. Remove power from the actuator.
2. Remove the control end cover.
CAUTION
To prevent Electro-Static Discharge
damage to the electronics, wear a
grounding strap during this procedure.
3. Disconnect the switch assembly by unplugging the
two connectors leading to the actuator body. To
unplug the connectors, use the 3/16” flat-tipped
screwdriver to press the release tab straight back
and slide the plug out of the socket (see Fig. 1).
4. Using the cross-tipped screwdriver, remove the
(2) cross-recessed screws fastening the switch
assembly to the stator (see Fig. 1).
5. Slide the assembly away from the actuator body
until it clears the coupling. Ensure the switch
arms do not catch on the cams or coupling while
removing the assembly.
Install the new switch assembly:
6. Slide the new assembly onto the shaft, ensuring
the switch arms do not catch on the coupling
or cams. Ensure that the small alignment pin
directly adjacent to the large opening in the switch
assembly mounting plate slides into the alignment
hole provided.
7. Check the mounting of the switch assembly to
ensure that it is flush and square to the rectangular
flange on the CPS. Install the (2) provided screws
(and washer, if applicable) and tighten to 12 lb-in
(1.4 N•m) torque.
8. Inspect the control end gasket; replace as
necessary. If the gasket is in good condition, skip
steps 9–10.
9. Clean the mating face of the actuator body to
remove any remaining gasket material and
adhesive. Ensure that the mating surface is free
of defects such as dents or gouges.
10.
Peel the backing off the replacement gasket and
carefully apply to the actuator body.
Test for proper operation—check switch operation:
11. Plug the connectors into their respective sockets.
12. Connect power to the actuator.
13. Run the actuator through its full range of motion.
Observe the actuator to verify the correct response.
Note whether or not the actuator stopped at the
correct position.
80-4281-06
Rev. 3.4
REPLACEMENT INSTRUCTIONS
CPS-4 SWITCH ASSEMBLY
REPLACEMENT KIT P/N 12-8061-06 & 12-8061-36
MODEL GROUP 22
E L E C T R I C A C T U A T O R S F O R I N D U S T R I A L P R O C E S S C O N T R O L