Posted by notjustair on November 30, 2015 at 22:40:45 from (70.195.11.252):
Sorry, this will be long. If you know me, you know I'm winded.
During harvest I had a deer jump out in front of me. I stomped on the brakes in the '97 Freightliner and didn't hit it. I noticed pretty darn quick that all of the brakes on the Dakota hopper bottom locked up but not the truck. I didn't think much of it because I was empty so it didn't brake like it would set with a full load.
Yesterday I went to pick up a new tractor with the same truck and the 35 foot flatbed with electric brakes. I've learned before to check the glad hands and make sure they aren't leaking because you have to release the trailer brakes even though there isn't a trailer. It messes up the truck braking for some reason. It has been this way since I bought it from a leasing company. Anyway, when I tried to load the tractor it pushed the semi. I had someone manually set the trailer brakes with the controller. The farther I drove home the more I noticed that the truck brakes weren't doing the stopping. I adjusted the boost of the controller but that didn't affect it any. If I hit the brakes hard the trailer brakes locked up. If I turned it down to low boost I could stand on the pedal and it slowly wound down to a stop. When I was about 30 miles from home I pulled off on a ramp to pee. I stopped, set the tractor brakes, and took my foot off the pedal. It wouldn't even hold it once it was stopped.
I noticed at the same time that with the tractor brakes set I could still hear the rear actuators moving when I pumped the brakes. From my way of thinking the brakes should be set all the way so you shouldn't hear the brakes moving at all with the pedal. Long story longer, here's my question: is there an air flow divider on that truck that could have gone out sending too much air to the rear and not enough to the tractor? All brakes are working equally and have good pad left. It doesn't have any leak down unless it sits for days. I'm puzzled. It reminds me of a hydraulic flow divider that has messed up.
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