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Typical steps to remove the AC rotor locking clamp with a hard stop provided by the use of a welded locking nut on the locking bolt are as follows: 

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<b>Caution:</b> If the gear case is still filled with oil, the gear case cannot be tilted more than 4 inches (102 mm) end to end from the horizontal or the oil will run around the seals and drain into the traction motor itself. 

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<b>Caution:</b> The AC rotor must be locked when the motor is transported, other than from work station to work station during processing, to prevent damage to the rotor bearings caused by shock and vibration. 

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This includes traction motors loose, in a combo, and in a truck. 

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<b>Caution:</b> Rotating the rotor while the rotor locking clamp is installed can damage the rotor and the rotor locking clamp and make removal of the rotor locking clamp difficult. 

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1. For each locking bolt, loosen the inboard-side locking nut away from the clamp and rotate it all the way up to the welded nut on the locking bolt. 

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2. For each locking bolt, loosen the outboard-side locking nut away from the clamp and rotate it all the way up to the locking bolt head. 

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3. Loosen both locking bolts by applying torque to the wrench flat on each locking bolt head, then completely unthread the locking bolts from the motor frame head by hand rotation. 

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4. Fully retract both locking bolts away from the motor. 

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5. Remove the rotor locking clamp from the frame-head exhaust opening. 

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6. Re-install the CE bearing housing bolts and washers in the two vacant CE bearing housing bolt holes, then torque the bolts to 56 to 60 lb.-ft. (76 to 81 Nm). 

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7. Place the rotor locking assembly at the designated place and save for future use. 

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<b>Caution:</b> If there is any oil in the gear case, use a three-point lift to raise the combo assembly and keep the gear case level within 4 inches (102 mm) end to end from horizontal. 

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If a traction motor combo with oil in the gear case is tilted, oil will flow past the seals and drain into the traction motor itself.



