Posted by Jeff Sell on August 21, 2014 
That's an interesting little maintenance car. Thanks for sharing.
Posted by Vd Brunnenfluh on August 22, 2014 
This roll car is DFB's track recording car, which is used once a year to check the track between Oberwald DFB and Realp DFB. Tolerance violations concerning track gauge, rack position, cant and other faults can be detected. The inventor, Hansuedi Daellenbach (a long time DFB volunteer) can be seen next to the track recording car.
Posted by Georg TrĂ¼b on August 23, 2014 
Thanks for the correction, sorry I was completely wrong. So there is a battery pack on the car not lubricants?
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