1989 - Updated Pneumatics
|8024 Universal Building Set
||8034 Universal Building Set
|8044 Pneumatic Universal Building Set
||8054 Motorized Universal Building Set
||8854 Power Crane
|8862 Backhoe Grader
This second generation pneumatics, released this year, fixed all the problems of the previous system. The double acting cylinders could be pressurized on either side, allowing significant force to be generated in either tension or compression.
Tension Summary: Depression of the pump produces pressure. Pressure flows to center port of switch. Pressure flows out enabled port to actuator rod end, retracting it. Return pressure from the head end vents through the other port of the switch. Return of the pump draws in air through the switch.
The new liftarm part is 1x4 with an axle slot at each end. 3/4 of the part is 1/2 stud thick, with the far end a full stud thick and notched to fit between 4 studs on a plate or brick. This part could be used as a crank and served as the prototype for many other sizes and shapes of liftarms to come which would be used prolifically for decades.
A new rack gear was introduced which is much longer (1x20) than the old 1x4. The gear teeth are recessed rather than standing proud of the base plate like the old rack. This rack is used principally to telescope long structures such as the boom of a crane. It's uses are not limited to Technic and, in fact, it was only ever used in one Technic model.
A special part was introduced to act as a fork for forklifts. It was only ever used for this purpose in Technic (on 4 different fork lifts). It is quite rigid and can support considerable weight.
A new hook part was the first all metal part in Technic. The significant weight of this part helped to keep the cables attached to it pulled taut.
A special brick appeared (new to Technic) which was 2x6x2 and filled with ballast. It was only ever used in three Technic sets to counterbalance heavy structures which could otherwise tip.