| Steel wheel drive railcar movers in addition
to not dampening shock loads through the steel-on-steel drive wheels can
actually amplify shock loading. This is done by increasing downward pressure
on the steel drive wheels via weight transfer coupling which borrows weight
from the attached railcar. |
 |
Rubber tire drive railcar movers support
most of their weight on the rubber tires absorbing most shock loads from
rail vibration. Non-weight transfer AAR couplers are equiped with a dense
urethane shock absorber to dampen shock loads from coupler movement. |
