If they are like the ones 'up here' they are flange lubricators.
A measured (hopefully) amount of lube is spritzed out to lubricate
the wheel flange/gage face of the rail. Reduces rail wear and
flange sqeual and energy consumption. Ours typically operate by
the pressure of the flange on a treadle spritzing the lube...
Most sommon on curvy bits.
thanks
dave pierson |the facts, as accurately as i can manage,
Digital Equipment Corporation |the opinions, my own.
334 South St |
Shrewbury, Mass USA pierson@gone.enet.dec.com
"He has read everything, and, to his credit, written nothing." A J Raffles