Another bad day
#41
10-15-2009, 05:38 PM
31 years ago I got paid to go to school, so I could learn that there very thing....I think. Yeah....they paid me to go to truck driving school. I think. I'm tired.
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#42
10-15-2009, 10:45 PM
GH....the only airline a "trolley bar" or "johnnie bar" activate, is the RED one. The redline only activates the trailer brakes, whether it is a 20 foot trailer or a 53 foot trailer, or 2- 28 foot trailers in tandem. (I think I got that right....I'm tired)
The blue line is only activated by the foot treadle. Actually the red line supplies air to the trailer when the red knob is pushed in. Also,when the red line is charged, the trailer emergency valve releases the trailer spring brakes. When the red knob is pulled out, the red line is discharged, no more air is supplied from the tractor to the trailer, and the trailer spring brakes are applied. Regarding the blue line, that is the "service brake" line. Anytime the red knob is pushed in and the trailer is charged, stepping on the treadle OR pulling the "Johnny Bar" will send the appropriate amount of air pressure thru the blue line to actuate the trailer relay valve and apply the service brakes on the trailer. The "Johnny bar" ONLY applies the trailer service brakes, whereas stepping on the treadle applies the tractor service brakes AND the trailer service brakes. If you don't believe me, push in the red knob, pull your blue gladhand off and apply the johnny bar, you'll get air from the blue line.. Then step on the treadle and you'll also get air from the blue line. (make sure your tractor parking brakes are applied (yellow knob pulled out)so your truck doesn't roll away while performing this test). .
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If you can't shift it smoothly, you shouldn't be driving it.
#43
10-16-2009, 02:00 AM
Then you're both wrong imo, pulling the trolley bar activates the blue line applying the brakes and the red button activates the red line providing the air to the trailer releasing the spring brakes and providing air to the trailer. Pulling the trolley bar will do nothing without the red button pushed in.
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#44
10-16-2009, 02:35 AM
every truck I have ever driven had this label
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#45
10-16-2009, 05:54 AM
GH....the only airline a "trolley bar" or "johnnie bar" activate, is the RED one. The redline only activates the trailer brakes, whether it is a 20 foot trailer or a 53 foot trailer, or 2- 28 foot trailers in tandem. (I think I got that right....I'm tired)
The blue line is only activated by the foot treadle. Your emergency line, RED only charges the trailer brakes!!!!
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#47
10-16-2009, 12:16 PM
Finaly the correct answer. :clap:
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#49
10-16-2009, 12:27 PM
No offense, you need to refund some of their money....lol kidding!!!!
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#50
10-16-2009, 02:02 PM
My truck does not keep the dash mounted "johnson bar" in place. It is spring loaded and goes back to off position when you release it.
I think all trucks should be like that. |
