1982 359 Peterbilt

Without a picture there is nothing to examine.

You are literally asking about a truck that two generations of current truckers know absolutely nothing about.

 

@wore out @Largecar359 @OLDSKOOLERnWV may have a idea how rare it is.

 

Not knowledgeable enough about it to give any advice to be honest. I see it’s make in Germany, may even be something a man has to send off to fix....?

@82 pete is this an electronic setup? I’m sure it is.

 

Argo tach/speedo graph. See if you can open the face to put a chart inside. It was a gauge that would manually record rpm/mph/time on a circular paper chart. You would put a new chart in every day.

 

Exactly right. I doubt that you can get charts for it any more. It should hinge at the bottom and there should be a key slot in the top. When we used them we retro-fitted a latch at the top so it didn't need a key.
We ran them for a couple of years but went back to the regular speed-o-graph because they weren't accurate.

 

There are probably a lot of drivers...drivers who have spent enough time on the road....who know what that thing is.

 

A quick google search shows that you can still buy complete units with charts.