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Typical steps to remove the AC rotor locking clamp without a hard stop provided by the use of welded locking nuts on the locking bolts 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. While holding the first nut on each locking bolt in place with a wrench, loosen the jam nut on each locking bolt. 

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2. Loosen the first nut away from the locking clamp. 

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3. Unthread both AC rotor locking clamp bolts from the framehead. 

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4. Remove the rotor locking bolts, the first nut, the jam nut, and the rotor locking clamp from the framehead exhaust opening. 

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5. Re-install the CE bearing housing bolts and washers in the two vacant CE bearing housing bolt holes. 

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6. Torque the CE bearing housing bolts to 56 to 60 lb.-ft. (76 to 81 Nm). 

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7. Place the rotor locking bolts, first nut, and jam nut into the bag-tag, tie the bag-tag to the rotor locking clamp, 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.


