Beck, R&J ELECTRIC ACTUATORS FOR INDUSTRIAL PROCESSCONTROL 11-1_9 用户手册

75

 

This section covers replacement of many 

components of the drive.  Note that some 
components are not field-repairable.  Refer to 
the drive outline dimension drawings on pages 
8–14 and to the cutaway illustration on page 4 for 
location of components on the drive.
 

If it should ever be necessary to replace the 

output gear, shaft, or output shaft bearings, a 
major overhaul is required and the drive should be 
returned to the factory.  During a major overhaul, 
the factory repair department will update the drive 
to include all possible engineering improvements.  
See "HOW TO OBTAIN SERVICE" on page 87.

 

During routine service, inspect the cover, 

motor, and change gear plate gaskets for wear or 
damage.  In order to protect internal components, 
worn or damaged gaskets and O-rings should be 
replaced.
 

To remove, scrape all of the old adhesive and 

gasket material from the body housing and cover.   
Cement the new gasket to the drive body using 
a gasket cement such as 3M #847 Rubber and 
Gasket Adhesive, or equivalent.
 

 

Worn or damaged output shaft, control end 

shaft, and motor shaft seals should be replaced 
to prevent damage to internal bearings and drive 
train parts.
 

To remove the shaft seal, push the blade of a 

small screwdriver along the shaft and under the 
seal lip.  CAUTION:  The seal is approximately 
1/4" (6 mm) wide.  Do not force the screwdriver 
blade beyond the width of the seal; damage to 
the shaft bearing could result.  Pry up on the seal 
and force it out of the housing.  Clean the shaft 
and housing then press in the replacement seal 
with the closed side facing outward.

 

The Beck control drive contains ball bearings 

on the output shaft, control end shaft, and motor 
shaft.  Bushings and thrust washers are used on 
combination gears.  Field replacement of these 
components is not recommended.
 

Motor shaft bushings in the body of the 

11-159/-169 and 11-409/-469 can be replaced.  
TIP:  To remove, fill the bushing with a heavy 
grease.  Select a drive pin that slip fits into the 
bushing.  Insert the pin into the bushing and tap 
with a mallet.  This will force the bushing out of 
the body casting.

 

The control motor is not field-repairable.  

Disassembly of the motor will result in a loss of 
torque that can only be restored by returning the 
motor to the factory for re-magnetizing.

 

To remove the motor, first disconnect the 

motor wires in the terminal compartment of the 
control drive.  
 

In the 11-159/-169 drives, the Handswitch must 

first be removed from the body before removing 
the terminal block and plate as an assembly.  
Follow the instructions in the paragraphs below.
 

In the 11-209/-269, -309/-369, and -409/-469 

drives, remove the terminal block and plate as 
an assembly.  Remove the black wire from the 
terminal post, cut the red motor wire near the 
red-yellow-red butt joint and disconnect the 
green wire from the motor capacitor.  Remove 
the mounting bolts and motor.  Carefully slide the 
motor out of the drive body.
 

To install the motor, insert the three-wire sleeve 

through the wire hole in the motor mount and into 
the terminal compartment.  Carefully slide the 
motor into the drive body.  Rotate the motor shaft, 
if necessary, to engage the pinion with the first 
combination gear.  Install motor mounting bolts 
and torque to recommended values.  See pages 
8–14 for torque values.  Reconnect the motor 
wires.  See the following section for reinstalling the 
terminal plate.

 

The motor resistor and capacitor are located 

under the terminals in the terminal compartment.  To 
replace a resistor or capacitor, remove the terminal 
cover. 
 

In the 11-159/-169 drives, the Handswitch must 

first be removed from the body before removing the 
terminal block and plate as an assembly.  Follow the 
instructions in the following paragraph. 
 

In the 11-209/-269, -309/-369, and -409/-469, 

remove the terminal plate.  Remove the existing 
part and transfer the wires one at a time to the 
replacement part.  Inspect the terminal plate gasket 
and replace if necessary.  To ensure a watertight 
seal between the plate and gasket, coat the gasket 
with a thin film of grease before replacing the 
terminal plate.  Torque the screws to 3 Ib-ft (4 N•m).

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