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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>Note:</b> The rotor locking clamp is installed on the Connection End (CE), also referred to as the Opposite Pinion End (OPE), of the AC traction motor. 

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Typical steps to install the AC rotor locking clamp with 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> 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. Remove the two CE bearing housing bolts opposite to the U-tube side. 

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<b>Note:</b> Do not remove the bearing cap. 

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2. Fully retract the two locking bolts of the rotor lock by positioning the inboard-side locking nut against the welded nut on each locking bolt and the outboard-side nut against each locking bolt head. 

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3. Install the rotor locking clamp by carefully inserting the clamp prong into the framehead exhaust openings, and position it behind the speed sensor gear, such that the two locking bolts line up squarely with the two vacant CE bearing housing bolt holes in the framehead. 

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<b>Caution:</b> Take care NOT to damage the gear teeth.
