Beck 12-8061-05 User manual

80-4281-05
Rev. 03
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 drive 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 drive. 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 drive to a close approximation of its original
calibration. Do not calibrate the drive 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” at-tipped screwdriver
Grounding strap
WARNING
Electrical shock hazard—disconnect
power before proceeding. Remove
the drive from line voltage and shut off
any external power sources feeding the
auxiliary switches.
PROCEDURE
Refer to Fig. 1 for component identication.
Remove the old control end assembly:
1. Remove power from the drive.
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 drive. 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 ne point marker to note the position of the
control end relative to the drive 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 ange (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 drive
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 9–13.
9. Protect the CPS-4 with a static-free cover.
10. Clean the mating face of the drive 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. Apply a thin lm of gasket adhesive (Scotch™ 847 or
equivalent) to the body’s mating face to adhere the
gasket.
12. Press the new gasket into place.
13. Remove the protective cover from the CPS-4.
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

14. Slide the new assembly onto the shaft, turning the
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).
15. 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 drive face. Snug the
screws down on the plate. Raise the 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.
16. Plug the pin connectors into their respective sockets.
17. Tighten the outer 2 setscrews on the coupling. The
screw on the at of the shaft must be tightened rst
to properly align the assembly. Torque screws to 12
lb-in (1 N•m).
Test for proper operation:
18. Connect power to the drive.
19. Modulate the demand signal to run the drive through its
full range of motion. Verify the correct drive response.
20. Modulate the signal to several intermediate levels and
note if the drive attains the proper position.
21. If the drive responds correctly, replace the control end
cover, tighten the cover bolts to 10 lb-ft (14 N•m) torque,
and return the drive to service.
22. If the drive 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
Screw, 8-32 x 1/2" (4) 30-0329-35
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
Switch Assembly 12-8061-06 or 12-8061-36
CPS-4 P.C. Board 12-8065-07
CPS-4 Coupling 12-8061-08
3/14
11 TERRY DRIVE NEWTOWN, PENNSYLVANIA 18940 USA
PHONE: [phone] FAX: [phone] E-MAIL: [email protected]
www.haroldbeck.com
HAROLD BECK & SONS, INC.
R
Made in USA
Figure 2
Figure 1
SWITCH
ASSEMBLY
SWITCH ASSEMBLY
PIN CONNECTOR
PIN CONNECTOR
PRINTED
CIRCUIT
BOARD
PRINTED
CIRCUIT BOARD
Press tabs straight back to
release connectors
KEEPER
ASSEMBLY
KEEPER
ASSEMBLY
PIN
CONNECTORS
PIN
CONNECTORS
SWITCH CAMS
COUPLING
INNER SETSCREWS (2)
(Do Not Adjust)
OUTER SETSCREWS (2)
NOTE: Tighten the setscrew
on the at of the shaft rst.
Mark actuator
face to locate
notch
align
notch with
locating pin
Button head
ScrewS (4)
Stator flange
lift claMp
over
Shoulder