7
3: REPLACING PARTS
The AST3225 transfer switch mechanism has been designed to allow all components to
be accessible and readily removable from the front of the back panel.
CAUTION When replacing any parts of the mechanism, isolate the transfer switch from
any possible source of power.
All AST3225 transfer switch mechanism hardware should be tightened sufficiently
before re-energizing the switch. The following table provides suggested tightening
torques.
Screw Size
Tightening Torque (in LB)
#4 5
#6 10
#8 20
#10 40
1/4” 90
3/8” 300
NOTE: For satisfactory performance, the switch terminal lugs must be securely fastened
to the terminal strips-90 (in-LB min.) Torque lugs screws to 200 (in-LB).
Replacement parts should be identified with reference to the Parts List on page 8 and the
Mechanical Assembly Drawing on page 13. All parts are available direct from the
factory. Be sure to state the model and serial number of the switch. These are located on
the arm label.
Manual for AST3225
Automatic
Transfer Switch
