Andco Actuators Linear Electric Actuator 7324T

Disconnect all electrical power to the actuator

Remove the brake cover from the motor end bell

Disconnect the coil power wires from the terminal strip

Remove the four socket head cap screws and lockwashers

Remove the entire brake assembly

Ensure no motor control cards are present

Select the voltage setting for the appropriate motor voltage

Set the test equipment to the selected voltage

Contact each test point with the test equipment ground wire on the gear case plate

Verify the actuator withstands the applied voltage for one second per test point without breakdown

Note on testing motor power circuits

Test motor power circuits based on motor voltage (AC)

Apply DC voltage at 1.414 times the specified AC voltage for dielectric strength tests

Refer to wiring diagram for test points

Remove the pipe plug (23) located in the side of the housing (1)

Inspect the lubricant for proper consistency and quality

Is the lubricant level adequate and uncontaminated?

Further Inspection (if necessary)

Is the lubricant level low or visibly contaminated?

Describe the issues found during further inspection

Disconnect all electrical power before removing covers of either position or thrust switch compartments.

Ensure service personnel are licensed/trained and authorized.

Disconnect and mark leads on the geared position limit switch and thrust switch.

Remove pipe plug (23) to allow vent air into the housing.

Remove limit switch assembly by removing hardware and rotating the switch assembly.

Remove o-ring (55) and thrust switch assembly.

Remove the brake cover to expose square head wear adjusting screws (15H) and the magnetic air gap 'A'.

Measure the air gap 'A' using a 3/8” to 1/2” wide feeler gauge at the center of the magnet.

Turn the two square head wear adjusting screws until the air gap 'A' measures the specified range for each model.

Is the air gap the same on both sides?

Ensure brakes are not adjusted for higher torques to prevent premature coil burnout.