Railway lifting jack - GIF

Railway lifting jack.

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Previously:

Bearing puller from hydraulic jack - video
Fan-propelled pallet jack - GIF
Jacking up a truck on a lift fail - GIF
Jacking up a vessel - GIF
Man changes tire without a jack - GIF
Toilet jack - photo

Are those axles only held in place by gravity?

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Originally Posted by hemmjo

Are those axles only held in place by gravity?

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Yes. The empty weight is 53,000 pounds (it's on the side of the car) and unless the railcar goes off the track, gravity will apply a decent down force and nothing is needed to hold the wheels in the trucks.