Slurry Injection Tanker designed for the official LEGO® Tractor #8284. No Tractor modifications, just mount a tow-bar.
The injector beam platform can be raised/lower by a manual pneumatic pump system. The injector beams themselves can be automatically raised and lowered by using the tractor's 'external spline shaft'. When the tractor drives, the injector beams raise/lower automatically, depending on the switch selection on the tanker. In the neutral switch selection, this can be done manually.
Remark: My first impression of the Tractor (#8284) was: "realistic looks and clever functions", but is it worthwhile buying? After one year I made the decision to buy the set, already in mind to build a slurry injection tanker for hooking-up.
Functions
Manual
Up-down injection platform by pneumatics
Up-down injector beams manually (turning knob) or automatically