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SEW Maintenance Series
Replacing a Stator
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2Product TrainingStator Replacement
Objectives
After reviewing the following information you will be able to accomplish the following:
– Remove an existing stator from an SEW motor– Install a replacement stator
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Tools and Materials
What you will need:
- 1 Replacement Stator- 1 Metric Socket-set w/ Wrench- 1 Medium Flat Tip Screwdriver- 1 External Snapring Pliers- 1 Torx-bit Driver- 1 Medium Dead-blow Hammer- 1 Pair of Cutting Pliers
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Safety
Always follow the proper lockout/tagout procedures.
Use the proper safety equipment at all times.
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RemovingExisting Stator
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Step 1
Disconnect all power sources to the motor.
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Step 2
Remove the conduit box lid using the appropriate metric socket.
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Step 3
Disconnect the power wires from the motor.
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Remove the four (4) Torx screws inside the conduit box.
Step 4
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Step 5
Remove the conduit box from the motor.
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Step 6
Remove the conduit box gasket from the motor.
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Step 7
Using a metric nut-driver, remove the 4 small screws that hold the fan guard in place.
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Step 8
Remove the fan guard.
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Step 9
Using the external snapring pliers, remove the snapring that secures the fan.
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Step 10
With the medium-sized flat-tip screwdriver, gently pry the fan up and down to loosen and remove it. Use caution to avoid damaging the fan!
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Step 11
Using the cutting pliers, remove the A-key from the rotor shaft.
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Step 12
Remove the rubber v-ring from the rotor shaft.
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Step 13
Using the appropriate metric socket, remove the four (4) motor tension rods.
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Step 14
Place the medium-sized flat-tip screwdriver between the stator and the motor end bell. Gently pry the stator at several locations to loosen it. Use caution to avoid damaging the stator fins!
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Step 15
Remove the wavy washer from the rotor shaft.
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Step 16
Tap the inside of the motor end shield to gently remove it from the stator.
End shield
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Step 17
Clean any dust or contamination from the motor parts.
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InstallingReplacement Stator
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Step 18
Slide the replacement stator onto the rotor. Rotate the stator until the conduit box is located at the same position as the previous stator.
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Step 19
Line up the tension rod holes. Then, gently tap the stator onto the flange.
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Step 20
Slide the wavy washer onto the rotor end.
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Step 21
Place the motor end shield onto the rotor while keeping the wavy washer aligned. Rotate the end shield until the tension rod holes are aligned and tap the end shield into place.
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Step 22
Using the appropriate metric socket and driver, install the four (4) motor tension rods.
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Step 23
Lubricate the rubber v-ring with oil or grease. Slide it over the end of the rotor shaft until it seats firmly against the motor end shield.
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Step 24
Install the A-key using the dead blow hammer.
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Step 25
Install the fan using gentle taps with the dead blow hammer.
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Step 26
Install the snapring with the external snapring pliers.
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Step 27
Place the fan guard over the fan, lining up the fan guard holes with the holes in the end shield.
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Step 28
Using the appropriate metric socket and driver, install the four (4) fan screws.
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Step 29
Place the conduit box gasket onto the motor.
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Step 30
Using the four (4) Torx screws and Torx driver, install the conduit box into its previous location to ensure that any drain holes remain in their proper position.
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Step 31
Reconnect all of the wires according to the appropriate wiring diagram.
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Step 32
Install the conduit box lid using the appropriate metric socket and driver.
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Step 33
Reconnect power and confirm the proper operation of the motor and attached equipment.