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Old 12-05-2023, 02:00 PM   #1
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Year: 2004
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Bus not moving forward

Hey yíall.

So randomly after about a week of sitting, I went to pull my bus around and it wonít move forward. I started the bus up fine. Waited for the air pressure to get above 60 psi, shifted into drive, and then tried to move forward and it wouldnít budge.

I can tell itís definitely shifted into drive because when I shift from neutral to drive it bucks a bit. Same with reverse. It was driving fine just last week. Nothing has changed. I feel itís something to do with the brakes. I drained all the air out and filled it back up. Still nothing.

Can anyone tell me what they think is wrong?

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Old 12-05-2023, 02:14 PM   #2
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could be the brake shoes are stuck to the drum.
make sure your brake pressure is up at least closer to 90 and try shifting forward to reverse trying to rock the bus back and forth. if that doesnt work then you can chock the wheels and climb under the bus and hit the drums with a hammer good sharp blows all the way around the drum everywhere you can.
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Old 12-05-2023, 02:17 PM   #3
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Originally Posted by Jolly Roger bus 223 View Post
could be the brake shoes are stuck to the drum.
make sure your brake pressure is up at least closer to 90 and try shifting forward to reverse trying to rock the bus back and forth. if that doesnt work then you can chock the wheels and climb under the bus and hit the drums with a hammer good sharp blows all the way around the drum everywhere you can.
Wow. Now itís moving forward again. Problem solved.

Do you know why that happens? Is there anything I can do prevent it or a specific reason why you think it happened in the first place ?

Thanks!
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Old 12-05-2023, 02:27 PM   #4
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if your weather has been like mine bipolar one day in the 70's the next day in the 50's and the nights one time in the 30's and the next in the 50's and rain in between then its compensating and creating rust in the drums.
one is to drive it more often.
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Old 12-05-2023, 05:01 PM   #5
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Had a similar hiccup with my bus a while back. If you're getting the bucking when shifting, it does sound like it's engaging the gear. Brake issues could be a culprit, but it might also be worth checking the transmission fluid level.
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Old 12-05-2023, 06:22 PM   #6
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Quote:
Originally Posted by Itzbussinbussin View Post
Wow. Now itís moving forward again. Problem solved.

Do you know why that happens? Is there anything I can do prevent it or a specific reason why you think it happened in the first place ?

Thanks!
Your slack adjusters could be shot or out of whack. Is this an air brake system?

They are easy to adjust and you could try to adjust them. They may have been tightened too much during a service or naturally tightened. I'd start there first.

Most slack adjusters have a hexagon looking bolt. You don't actually use a wrench on it, and there's also a square bolt on the bottom of the adjuster. You want to tighten the square bolt till it's tight. It won't turn the other way so don't try or you could break your slackadjuster. Once the square area is tightened you can take a small flat head screwdriver and pry under the hexagon looking bolt on the side. It pops out like a washer would if you pried it up. Once up, (doesn't come out all the way), you can then turn the square bolt the other direction and you should do so half a turn (Half a circle), then push the hex washer thing back in, and you're done. Do this to all 4 slack adjusters to adjust your brakes properly.

If it's hydrolic brakes, then ask someone else as I haven't messed with those on a bus.
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