Small diesel vehicle ("tractor") Tm 2/2 # 506 of the Dampfbahn Furka Bergstrecke (DFB) in Muttbach-Belvédère station on 2120 meter a.s.l. This vehicle without cogwheel drive is used for shoving the steamtrains through the 1874 meter long Furka Summit tunnel, which has a maximum grade of 3.5 % from Muttbach to Furka DFB. The engineer left the vehicle after entering track 2, to line the switch for the "diesel train" from Gletsch to Realp later. The Furka summit tunnel was built between 1913 and 1916 by the Brig-Furka-Disentis railway, which got bankrupt then, and was finished in 1925 only by the new founded Furka-Oberalp-Bahn (FO).
