Hot Bulb Pneumatic Tractor

10,00  -Excl. Tax

A LEGO Technic replica of a Hot Bulb Tractor, with a working pneumatic engine. Features drive (operated by the pneumatic engine with gearbox), manual adjustable ignition point and steering, and a suspended seat.


Video Presentation



  • Hot Bulb Pneumatic Tractor with Adjustable Ignition Timing
  • Equipped with single pneumatic engine with one valve (unmodified)
  • Flywheel for inertia with 5/1 gearing
  • Adjustable ignition timing based on the differential principle, enable to adjust the ignition point finely
  • Steering with steering wheel (worm screw, gear, lever)
  • Power Take Out at the rear with command
  • Openable hood which reveals the engine and working fan
  • Suspended seat
  • Run with 4 LEGO pumps and air tank

You can read the full review of this model on the blogpost.


How to build ?

You can purchase the PDF instructions on this shop and build with your own parts. The instructions contain the partlist at the end, but you can check on Rebrickable or in the instructions preview below.

Please note that you need to add a source of air to run the engine, such as a compressor, air bottle of air pump. If you have not a compressor or correct pump, you can download for free the LEGO Hand 4x Pump (see on the shop), which can runs the tractor.


About this product

Instructions preview

Additional information

Model Size





All, Construction Equipment, Machine



Building Difficulty


Piece Count


Bill Of Material

Purchased File

PDF Instructions (40 pages / 17 mo)