In the mid 90's I had to pick up a load of scrap in Vermillion SD and haul it to St.Paul Mn to be recycled. It was mid Jan, and very very cold. I arrived at Vermillion, got loaded up to 80klbs, and headed towards my destination.
I didn't make it very far and I noticed my truck was pulling very hard. I was running normal boost (30psi), and the engine seemed to be running right, but I was gradually slowing down even on the flats until I could barely hold about 40mph.
I pulled off on the shoulder of interstate I29 to see if I could tell what was going on, and noticed the trailer brakes were starting to smoke. There must have been moisture in the trailer air system that froze in the extreme cold and it was blocking the supply line. I put alcohol in the system but it just wouldn't thaw. I thought I'd try and muscle the trailer to the next exit, but the brakes had completely clamped down tight by this time. So I called a trailer service place in Sioux Falls to come out and fix it.
They arrived about an hour later, and tried everything they could without any luck. The frigid temps were making their efforts harder, and they needed to warm up in the truck every 15minutes or so. Finally, after not being able to fix the brakes yet the mechanic asked me if I'd pull the trailer to their shop if he were to cage the brakes. It was my decision, and he didn't push the subject. I thought about it and said yes, thinking I'd still have 3 axles with brakes(my truck) and would just take it real easy.
So he cage the brakes, and just before I headed out he said "Make sure you push you emergency valve in to supply the trailer". I said ok, and shut the door. Then I thought about it, and thought what difference would it make to supply the trailer, the brakes are caged, it doesn't need air now. So I didn't push the red valve in, and headed out. The mechanic followed in his shop truck.
I took it real easy up the interstate to I90 and headed east. Their shop was at the first exit east of I29. Long before I got too the exit I started backing it down and getting on the binders since my truck didn't have a jake. I topped the ramp at maybe 25mph and really started pushing on the pedal but it wasn't slowing down very good at all anymore. By the time I was at the bottom I was still doing about 10mph, and I had a red light...................I just couldn't stop!!!!!
I got on the airhorn, and tried to make a right turn as tight as I could. Somehow, by the grace of God all the cars going through the intersection were able to avoid hitting me, and I finally was able to get it stopped on the shoulder. The mechanic pulled in behind me, and I jumped outta the truck still shaking. He came up to see what had happened, and we saw my steer brakes were smoking. I said "The steers must've been the only brakes I had working, WTF!!!!"
He asked "Did you supply the trailer like I told you?". I hadn't, I didn't think it made a difference.:Banghead
He then explained to me how the system was designed to greatly reduce the drive axle brakes when the trailer is not supplied with air, being the semi should be bobtailing when set like this. It's to prevent the drive axles from skidding with no weight on them.
I had been running with my steer brakes doing almost all the work of trying to stop 80klbs.:Banghead
What did I learn? Alot!!
1) I should not have moved the trailer without it having operating brakes unless it was absolutely critical to do so. It was not in this instance.
2) I should've listen to the mechanic instead of "thinking" I knew better than doing his recommendations.
3) I should've tested my braking ability and had a better idea of how poor my brakes now were as soon as I had a chance from leaving the original breakdown point.
4) I probobly should've put the truck into the ditch before entering an intersection with traffic while going thru a red light.
There's no amount of time too long I could've sat on that shoulder with my brakes frozen up, had the situation ended up where I'd ran over a car, or killed someone. I made many bad decisions in this situation. Had I simply done #1 above and waited however long it would've taken for them to fix it in the cold, no one would've been put at risk.
I didn't make it very far and I noticed my truck was pulling very hard. I was running normal boost (30psi), and the engine seemed to be running right, but I was gradually slowing down even on the flats until I could barely hold about 40mph.
I pulled off on the shoulder of interstate I29 to see if I could tell what was going on, and noticed the trailer brakes were starting to smoke. There must have been moisture in the trailer air system that froze in the extreme cold and it was blocking the supply line. I put alcohol in the system but it just wouldn't thaw. I thought I'd try and muscle the trailer to the next exit, but the brakes had completely clamped down tight by this time. So I called a trailer service place in Sioux Falls to come out and fix it.
They arrived about an hour later, and tried everything they could without any luck. The frigid temps were making their efforts harder, and they needed to warm up in the truck every 15minutes or so. Finally, after not being able to fix the brakes yet the mechanic asked me if I'd pull the trailer to their shop if he were to cage the brakes. It was my decision, and he didn't push the subject. I thought about it and said yes, thinking I'd still have 3 axles with brakes(my truck) and would just take it real easy.
So he cage the brakes, and just before I headed out he said "Make sure you push you emergency valve in to supply the trailer". I said ok, and shut the door. Then I thought about it, and thought what difference would it make to supply the trailer, the brakes are caged, it doesn't need air now. So I didn't push the red valve in, and headed out. The mechanic followed in his shop truck.
I took it real easy up the interstate to I90 and headed east. Their shop was at the first exit east of I29. Long before I got too the exit I started backing it down and getting on the binders since my truck didn't have a jake. I topped the ramp at maybe 25mph and really started pushing on the pedal but it wasn't slowing down very good at all anymore. By the time I was at the bottom I was still doing about 10mph, and I had a red light...................I just couldn't stop!!!!!
I got on the airhorn, and tried to make a right turn as tight as I could. Somehow, by the grace of God all the cars going through the intersection were able to avoid hitting me, and I finally was able to get it stopped on the shoulder. The mechanic pulled in behind me, and I jumped outta the truck still shaking. He came up to see what had happened, and we saw my steer brakes were smoking. I said "The steers must've been the only brakes I had working, WTF!!!!"
He asked "Did you supply the trailer like I told you?". I hadn't, I didn't think it made a difference.:Banghead
He then explained to me how the system was designed to greatly reduce the drive axle brakes when the trailer is not supplied with air, being the semi should be bobtailing when set like this. It's to prevent the drive axles from skidding with no weight on them.
I had been running with my steer brakes doing almost all the work of trying to stop 80klbs.:Banghead
What did I learn? Alot!!
1) I should not have moved the trailer without it having operating brakes unless it was absolutely critical to do so. It was not in this instance.
2) I should've listen to the mechanic instead of "thinking" I knew better than doing his recommendations.
3) I should've tested my braking ability and had a better idea of how poor my brakes now were as soon as I had a chance from leaving the original breakdown point.
4) I probobly should've put the truck into the ditch before entering an intersection with traffic while going thru a red light.
There's no amount of time too long I could've sat on that shoulder with my brakes frozen up, had the situation ended up where I'd ran over a car, or killed someone. I made many bad decisions in this situation. Had I simply done #1 above and waited however long it would've taken for them to fix it in the cold, no one would've been put at risk.
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