Posted by trucker 40 on October 01, 2010 at 17:38:38 from (69.152.175.239):
In Reply to: Semi brakes posted by msb on September 30, 2010 at 20:12:39:
Ive had mine on fire going down a mountain before,and they were no good after that.You could pull the buttons and it would roll off with the brakes adjusted right.It glazes the shoes and then they wont stop you.
Ive used a whole fire extinguisher on one before and barely got it out.With the old slack adjusters if it wasnt blazing real bad you might be able to slide under there with a wrench and back it off then drive down the road and the wind would put the fire out in a couple of miles.Ive done that before.You can set the wheel seal on fire and then you are in bad shape.Ive seen trailers burned up a lot of times,especially in the winter where it got on fire and then caught the wheel seal on fire and then it caught the trailer on fire then the cargo.
Since you got the fire out you may have got lucky as long as you dont have any seals leaking now.You probably should get a flashlight and look at all the seals and see if any are leaking.If any are leaking you better fix that right now and if you can pull the drums without pulling the hubs you need to pull the drums and put new shoes on there.
There are some auto adjust slack adjusters that you have to use special grease in or they wont work right.Look up what kind of slack adjusters you have and clean them up and see if you can get them working while you have the brakes off.They get rusty or somebody that doesnt know what they are doing can mess them up trying to adjust them.
Measure your drums and look them over good for cracks and uneven wear.If they are still good you can turn them maybe if you can find a shop that turns them.If they are smooth you can skip turning them.Even if they are a little rough you can use them as long as they arent wore out.The new shoes will just wear in the grooves.You will probably have to adjust them a few times to get good brakes though.
I saw a cement truck that happened to a couple of months ago.He didnt have them on fire but he was shooting water on them from the tank on his truck and it stunk like they had been on fire.He had a cloud of steam higher than the truck and it looked like it was on fire.
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