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Subject: 
Pneumatic hose color usage
Newsgroups: 
lugnet.technic
Date: 
Sat, 5 Jul 2003 15:30:19 GMT
Viewed: 
781 times
  
In one of the LEGO pneumatic basic sets, you get a light grey hose, a black hose
and a blue hose.  I used the blue hose to get from the pump to the switch, the
black hose on the contract port of the piston (to match the black cap that is
there), and the light grey on the expand port of the piston.

Since this was my first experience with LEGO pneumatics I assume that was a
standard color scheme.  Anyone know why the black hose is longer than the light
grey hose?

In the 8455, there is a very long black hose and a much shorter light grey hose.
You cut these hoses up to the lengths specificed in instruction manual.
Throughout the assembly of the 8455, the same color hose is used at both ends of
a given piston.  It would seem that normally, the light grey == expand, and
black == contract color scheme is not used.

I've only looked at the 8455's hose usages.... Anyone know the motivations
behind LEGO's use of two hose colors?

Thanks,
Kevin



Message has 3 Replies:
  Re: Pneumatic hose color usage
 
I own sets that use transparent hose from the pump to the switch and black to the pistons, and a set where grey is used from the pump to the switch and black to the pistons. In the 8868, the black hoses become quite the head ache, and i always find (...) (21 years ago, 5-Jul-03, to lugnet.technic)
  Re: Pneumatic hose color usage
 
(...) I have 2 different sets with pneumatics. The first is 5218 which has 3 hose colors (blue, light grey, black) and uses them like the basic set you describe. The other set is 8250/8299 and has only 2 hose colors: light grey from the pump to tank (...) (21 years ago, 6-Jul-03, to lugnet.technic)
  Re: Pneumatic hose color usage
 
(...) It seems that they changed the color schemes for this a couple of times. For a long time (1985-1997), almost all of the sets used the one you described there, with gray tubes for the pump-valve inlet connections and black ones for the (...) (21 years ago, 6-Jul-03, to lugnet.technic)

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