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Re: Drum brakes [message #329050 is a reply to message #329003] Sun, 11 February 2018 09:20 Go to previous messageGo to next message
JohnL455 is currently offline  JohnL455   United States
Messages: 3045
Registered: October 2006
Location: Woodstock, IL
Karma: 16
Senior Member
80,000 pound GVW Tractor trailer rigs seem to still be using those " horrible" drum brake things just fine.

John Lebetski
Woodstock, IL
77 Eleganza II
Re: [GMCnet] Drum brakes [message #329051 is a reply to message #329050] Sun, 11 February 2018 10:31 Go to previous message
James Hupy is currently offline  James Hupy   United States
Messages: 4680
Registered: May 2010
Karma: 34
Senior Member
Yes but they don't have weenie-a$$ ways to apply the stopping forces. They
use air pressure, a lot of it. And what do you think those runaway sand
traps on steep downgrades are there for? As well as the brake check areas
at the summits?
Brake linings are a consumable product. They need constant
maintenance. That is another advantage of disc brakes. Ease of inspection
and maintenence.
PACCAR, a European company that owns Kenworth trucks, among other
brands, has a technology and development center in LaConner, Washington.
They develop products for the trucking industry, including brakes. We (the
GMC CASCADERS) had the rare opportunity to visit the center last year. Lots
of stuff coming down the pike on brakes. Including automatic application
via computer controls when weary drivers approach corners too fast, and
breach summits with too much speed, etc. They have a shaker table there big
enough to hold a fully loaded Semi truck and 55 foot trailer for testing.
High tech stuff for sure.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

On Feb 11, 2018 7:21 AM, "John R. Lebetski" wrote:

> 80,000 pound GVW Tractor trailer rigs seem to still be using those "
> horrible" drum brake things just fine.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
>
>
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