[MOC] Pneumatic Cherry Picker - 42128 alternate + instructions

[BrickRandom]

Inspired by LEGO 8292 Cherry Picker, I've created a pneumatic rendition of that model as an alternate build of LEGO 42128 Heavy Duty Tow Truck.

Pneumatic Cherry Picker by Brick Random, on Flickr

 My Pneumatic Cherry Picker has the following functions:

• steering (turn the knob on top of the cab)
• raise arm (pneumatic)
• extend/retract arm (pneumatic)
• turn arm (lift and turn the knob on top of the cab)
• open doors (manual)
• 4 cylinder engine driven by the four rear wheels

A video demonstrating the functions:

The basic shape of the original model is still visible in the final build of the Pneumatic Cherry Picker. However, the internal structure is almost entirely new, as a result of changing from mechanical to pneumatic operation of the arm, adding the engine (with two differentials for the four rear wheels) and the availability of parts in 42128.

Instructions

The model consists of 900 parts (all from 42128 Heavy Duty Tow Truck). Building instructions (a 215 step PDF document) are available on Rebrickable: https://reb.li/m/123565

More pictures are available on Flickr: Pneumatic Cherry Picker by Brick Random

Edited September 20, 2022 by BrickRandom
typo's and layout

[Jurss]

That multiknob solution is interesting.

If not mistaken, rise cylinder works just one way - up. Down it goes just by gravity?

You could try to better arrange tubes, so they not stand out so much. And fix better that pump. It seems like it is held in place by one pin.

 

[BrickRandom]

4 hours ago, Jurss said:

That multiknob solution is interesting.

If not mistaken, rise cylinder works just one way - up. Down it goes just by gravity?

You could try to better arrange tubes, so they not stand out so much. And fix better that pump. It seems like it is held in place by one pin.

 

Thank you. Yes, moving the arm down is just gravity.

There is indeed some room for improvement on the tube routing. The pump is attached with two pins, but has some wiggle room. I may try to improve that on a new version.