﻿GET_GEVOMechL2_08_01_01_88 - ANIMATION Screen
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Summarize the major steps to remove and install a traction motor combo.

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Traction Motor Combo Removal

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1. Position the traction motor combo to be removed over a single-axle drop table.

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2. Set the locomotive wheel brakes and chock the wheels on the truck not being worked on, then manually release the brakes on the wheels of the traction motor combo to be removed by closing the cut-out cock in the air line for that truck.

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3. Disconnect all power cables and the motor ground cable of the traction motor combo to be removed from the truck, then secure the cables to prevent damage during traction motor combo removal.

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4. Unplug the speed sensor cable of the traction motor combo to be removed, then remove the cable clamp.

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5. If equipped, disconnect the bearing temperature sensor cables of the traction motor combo being removed.

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6. Remove the pins from the slack adjusters of the traction motor combo to be removed, and adjust the slack adjusters to the shortest length.

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7. Remove the brake shoes by removing the keys from the brake heads.

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8. If the traction motor combo to be removed is one of the end assemblies on the truck, loosen and remove all but one of the sand bracket bolts at both ends of the axle, and swing the sand brackets away to prevent fouling when the combo is lowered.

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9. Disconnect the traction motor air duct from the top of the traction motor.

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10. Remove the pedestal liner and axle journal bearing housing retaining bolts, retainers, and any free pedestal liners.

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11. If the traction motor combo to be removed is in positions 1, 3, 4, or 6:

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a. Disconnect the axle snubbers from the journal box adapters at both ends of the axle.

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b. Support the truck frame with wooden blocks and hydraulic jacks from the floor adjacent to the traction motor combo being removed.

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12. Disconnect the AC traction motor nose suspension as follows:

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a. Place a suitable jack under the lugs or motor frame, and ensure the jack cannot slip off if the motor moves or tries to rotate.

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b. Disconnect the suspension link from the motor.

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c. Pull the suspension link away from the motor by using a come-along or similar chain rigging.

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d. Lower the drop table by a few inches while raising the jack to allow the motor safety nose to clear the truck frame.

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13. Remove the DC traction motor nose suspension as follows:

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a. Jack or lift the traction motor nose to compress the suspension assembly approximately 0.5 inches (13 mm).

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b. Install a 1/2-13 x 6.5 inch (165 mm) long bolt and nut between the U-channels on both sides of the suspension assembly.

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c. Tighten the nuts to compress the suspension assembly to 11.7 inches (297 mm) or less.

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d. Lower the traction motor slightly, then remove the cotter pins and retaining pins that secure the vertical keeper pins in the suspension assembly.

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e. Slide the suspension assembly sideways, removing the assembly from the truck frame.

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f. Inspect the traction motor nose suspension assembly for separation of laminations, badly eroded rubber laminations, or cracked or broken cast members and, if defective, remove and replace the traction motor nose suspension assembly.

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14. In a DC traction motor, check the suspension lugwear plates on the traction motor and, if excessively worn, replace the plates.

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15. Lower the drop table by approximately 5 inches (125 mm), place chocks over the rail, and nip the securing bolts to secure the traction motor combo in place.

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16. Raise the drop table by 2 inches (50 mm) to compress the coil springs.

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17. For the four coil springs at the traction motor combo, place a spring retaining strap around the truck frame, under the air piping and through the spring coils at approximately the fifth coil, then join the strap ends, leaving at least 12 inches (300 mm) of slack in the straps.

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18. Apply C-clamps on each wheel rim below each side of the axle journal bearing housing to prevent the housing from rotating during traction motor combo removal.

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19. Raise the traction motor nose up to clear the nose suspension or the truck frame as the traction motor is lowered.

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20. Support the traction motor nose with blocks suitably placed under the frame, such that it cannot slip off if the traction motor moves or rotates.

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21. Lower the drop table until the space between the top of the axle journal bearing housing and the truck frame is approximately 7 inches (175 mm), then tighten the coil spring retaining straps to remove any remaining slack.

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22. Lower the drop table until the traction motor combo clears the truck and remove any remaining truck pedestal liners.

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23. Move the traction motor combo from beneath the truck and locomotive.

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24. Using a suitable hoist, lift the traction motor combo from the drop table and move it to the area assigned for cleaning, maintenance, or storage.

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25. Set the traction motor frame in the normal horizontal position on blocks high enough so that the wheels clear the floor.
