Air brake knobs
includes trailer supply and tractor/engine brake
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updated March 16, 2025
Description
PDFhe is a model of a semi-truck air brake and trailer air supply. the Dimond is a yellow knob for the engine itself. the ither one is red and is for the trailer. it does not matter which side it is on. the pad on the right is the featured Alison transmission main bord. you can use this for the school bus ride or as a fidget
Tags
Model origin
The author marked this model as their own original creation.
