Ratcheting Indexer Pushes in increments of approx. 15 feet per cylinder stroke on one side of the railcar. The cylinder is pushing (3) carriages. Progressor Alternates pushing from one side to the other, providing continuous movement. Each cylinder pushes (2) low dog carriages. Indexer/Progressor Is both an Indexer and a Progressor. When forces are less than 30K, it’s a Progressor. When forces are greater than 30K, it’s an Indexer-pushing on both sides at the same time and it can push up to 60K. Each cylinder pushes (3) carriages. Allowable Forces: One side of empty car is limited to 7.5K pounds Both sides of empty car is limited to 15K pounds Pushing on one side of loaded car, limited to 30K pounds Pushing on both sides of loaded car, limited to 60K pounds Speeds 0-60 FPM. Typical speed is 25-30 FPM Application Notes: Can be mounted on rail ties or a concrete foundation. Can be used for Loading or Unloading applications.