rnagle
CDL Student Driver
Posts: 564
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Post by rnagle on Jul 2, 2011 18:22:27 GMT -5
For city tractors, they are generally spec'd pretty basic so a single stack is the simplest, cheapest (and lightest) spec for exhaust. As for double bunk straight trucks they are a bit unusual although not unheard of, many "expeditor" vans have big bunks on them. Link to a post on Hanks Truck Pictures showing an example: hankstruckforum.com/htforum/index.php?topic=16509.msg137442#msg137442 |
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rnagle
CDL Student Driver
Posts: 564
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Post by rnagle on Jul 6, 2011 4:27:55 GMT -5
There would be at least 2 air tanks, for primary and secondary brake systems. Most seem to have 3, one being a "wet" tank which the air compressor fills first. Most of the condensation/oil/etc is supposed to settle out of the air in this tank. In addition there will be assorted valves for the brake system and air suspension if fitted.
Air line & wiring routing as you describe sounds correct, brake valve will be on left side of cab (assuming North America of course!) and lines/wires crossing over to right side would be supported at crossmembers.
Other than brake and air suspension lines (if equipped) there will be wiring for rear lights, not much else if it is a tractor. Depending on type of body a straight truck could have additional items such as hydraulic lines if fitted with a boom like the one in Italeri's truck accessories set or air lines to a dump box tailgate latch.
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rnagle
CDL Student Driver
Posts: 564
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Post by rnagle on Jul 6, 2011 19:52:42 GMT -5
No real pattern to that, one truck at my work has a separate junction box for light wiring on rear frame crossmember, on others wires will go to the cab and terminate at a "junction block" on firewall.
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