The Schwerkleinwagen or Rottenkraftwagen Klv 53 are rail tractors, which are mainly used for track construction and maintenance work. They are available in various special designs with and without a crane, as well as in a team with an associated flat wagon.
 The finished model consists of approx. 605 individual parts and can be motorized using the Power-Functions M-Motor. Despite the flat loading floor, the M-motor is installed here and hidden under a dummy pallet. The motor drives both axes of the main unit via worm shafts. This drive concept results in a prototypical driving behavior. The IR receiver is located in the driver's cab and the PF battery box is installed in the floor of the trailer under a plan. The model is built in two different versions, optionally with an old 9V battery box or with a PF battery box. This article is the PF variant.
 Copyright of model by S. Jakobi / Dr. Snotson