Beck GROUP 22 Replacement Instructions

80-4281-05
Rev. 4
REPLACEMENT INSTRUCTIONS
REPLACEMENT KIT P/N 12-8061-05 & 12-8061-35

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
3/16" flat-tipped screwdriver
Grounding strap
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 Fig. 1 for component identification.
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.
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
CONTROL END ASSEMBLY, CPS-4
WARNING WARNING
MODEL GROUP 22
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
leading from the P.C. board slides off with modest force.
4. Loosen the two outermost setscrews on the coupling.
Do not loosen the inner setscrews.
5. Use a fine point marker to note the position of the
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
the stator flange (see Fig. 2). Snug one of the screws to
hold the clamp up while replacing the assembly. Allow
the bottom clamp to hang by the screws.
7. Slide the control end assembly away from the actuator
body until it clears the control end shaft.

Install the new assembly:

8. Inspect the control end gasket and replace as necessary.
If the gasket's condition is good, skip Steps 9–12.
9. Protect the CPS-4 with a static-free cover.
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. Peel the backing off the replacement gasket and
carefully apply to the actuator body.
12. Remove the protective cover from the CPS-4.
CAUTION