Beck GROUP 22 Guide

80-4281-05
Rev. 4
PURPOSE
The purpose of these instructions is to provide
a step-by-step method for replacing the Beck
Group 22 Control End assembly. The control end is
located on the rear face of the actuator beneath the
Handswitch.
The screws and washers included in Table 1 are
provided as part of the replacement kit in the event
that some are lost while servicing the actuator. The
subassemblies listed in Table 2 are included with the
control end assembly.
The replacement control end assembly has been fully
calibrated at the factory. This replacement procedure
will return the actuator to a close approximation of its
original calibration. Do not calibrate the actuator until this
procedure is complete, and then only if necessary. Refer
to Beck Instruction Manual 80-4280-02 for calibration
instructions.
REQUIRED TOOLS
1/2” socket
3/32” hex driver
Torque wrenches appropriate for 12 lb-in (1 N•m)
and 10 lb-ft (14 N•m)
Fine point marker
 
Grounding strap
WARNINGWARNING
Electrical shock hazard—disconnect
power before proceeding. Remove the
actuator from line voltage and shut o󰀨
any external power sources feeding the
auxiliary switches.
PROCEDURE

Remove the old control end assembly:
1. Remove power from the actuator.
2. Remove the control end cover, using care not to bend
the control shaft or damage the position-sensing
assembly inside.
CAUTION
To prevent Electro-Static Discharge damage
to the electronics, wear a grounding strap
during this procedure.
3. Disconnect the control end assembly electrical circuits
by unplugging the three multi-pin connectors from
the actuator. Two connectors lead from the switch
subassembly and the other connector leads from
the Printed Circuit board. To disconnect the switch
subassembly connnectors, use a 3/16” flat-tipped
screwdriver to press the release tab straight back (see
Fig. 1) and pull the plug out of its socket. The connector
󰀨
4. Loosen the two outermost setscrews on the coupling.
Do not loosen the inner setscrews.
           
control end relative to the actuator body. Mark the
drive’s face immediately adjacent to the top of the
notch (see Fig. 2).
6. Loosen (do not remove) the four mounting clamp button
head screws (3/8” long) and slide the top clamp up over
the edge of the shoulder in the body, immediately above

hold the clamp up while replacing the assembly. Allow
the bottom clamp to hang by the screws.
 
body until it clears the control end shaft.
Install the new assembly:
8. Inspect the control end gasket and replace as necessary.

 
10. Clean the mating face of the actuator body to remove
any remaining gasket material and adhesive. Use
caution not to damage or bend the control shaft. Ensure
that the mating surface is free from damage (such as
dents or gouges).
11.    󰀨    
carefully apply to the actuator body.
 
REPLACEMENT INSTRUCTIONS
CONTROL END ASSEMBLY, CPS-4
REPLACEMENT KIT P/N 12-8061-05 & 12-8061-35
MODEL GROUP 22
ELECTRIC ACTUATORS FOR INDUSTRIAL PROCESS CONTROL

 
coupling (if necessary) to align the assembly with the
shaft. Align notch in the stator with the locating pin
situated to the left of the control end shaft (see Fig. 2).
14. Loosen the clamp screw to allow the top clamp
to drop into place over the upper rim of the stator.
Rotate the assembly as necessary to align the top of
the notch with the mark made earlier on the actuator

bottom clamp into position and snug the screws down.
Check the clamps for proper shoulder clearance and
tighten the screws to 12 lb-in (1 N•m) torque.
15. Plug the pin connectors into their respective sockets.
16. Tighten the outer 2 setscrews on the coupling. The

to properly align the assembly. Torque screws to 12
lb-in (1 N•m).
Test for proper operation:
17. Connect power to the drive.
18. Modulate the demand signal to run the actuator through
its full range of motion. Verify the correct actuator
response.
 
note if the actuator attains the proper position.
20. If the actuator responds correctly, replace the control
end cover, tighten the cover bolts to 10 lb-ft (14 N•m)
torque, and return the actuator to service.
21. If the actuator does not respond correctly, refer to
the troubleshooting and calibration sections of Beck
Instruction Manual 80-4280-02.
Table 1: Control End Replacement Kit
Description Part Number
Control End Assembly 23-2500-01 or 23-2500-51
 
Washer, Flat #8 (4) 30-0313-31
Washer, Lock #8 (4) 30-0327-20
Gasket, Control End 10-8080-02
Table 2: Subassembly Kits
Description Part Number
 12-8061-06 or 12-8061-36
 12-8065-07
 12-8061-08
3/20
11 TERRY DRIVE NEWTOWN, PENNSYLVANIA 18940 USA
PHONE: [phone] FAX: [phone] E-MAIL: [email protected]
www.haroldbeck.com
HAROLD BECK & SONS, INC.
R
R
Made in USA
Figure 2
Figure 1



PIN CONNECTOR
PIN CONNECTOR
PRINTED
CIRCUIT
BOARD
PRINTED
CIRCUIT BOARD
Press tabs straight back to
release connectors
KEEPER

KEEPER

PIN

PIN


COUPLING

(Do Not Adjust)

NOTE: Tighten the setscrew












