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Old 04-01-2016, 07:13 PM   #1
Skoolie
 
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Air parking brake won't release?

Parked my 97 bluebird with air brakes in January and haven't released the parking brake since. Now when I push the button to release it I don't hear that nice escape of air. Any ideas where to start? I'm thinking somethings just stuck
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Old 04-01-2016, 07:38 PM   #2
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maybe hole in air line somewhere, does it come up to pressure?
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Old 04-01-2016, 07:45 PM   #3
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air brakes need air..... they are engaged when they have no air to hold back the pads. check your compressor, air dryer, tanks.

its possible that some water froze in the system and did damage.

there should be a schrader valve somewhere in the system so you can air up the brakes to move the bus.
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Old 04-01-2016, 09:58 PM   #4
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I would crank the engine to get the tanks filled, and you should be able to release the brakes... After that long a time, I'm not sure any vehicle would have any air left in the tanks...
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Old 04-01-2016, 10:27 PM   #5
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The tanks seem to air up. One makes a whining noise until it's full of air. I have some valves labeled wet, back brake and front brake and I drained the air out of those and let the tanks fill up and they still wouldn't release. I am going to go check it out more tomorrow but am not familiar with air brakes so it's hard for me to speculate on what could be wrong. I was hoping maybe something just got a little stuck
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Old 04-01-2016, 10:46 PM   #6
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Air up, chock the wheels, release the pkg. brake and crawl under with a hammer and give the rear drums a good whack.
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Old 04-02-2016, 12:38 AM   #7
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Agree with @kool4skool. Just make sure you chock the wheels REAL good. The shoes tend to rust/stick to the drums when it is parked. We would sometimes hammer the shoes EASY if there is room in the backing plate.
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Old 04-02-2016, 12:26 PM   #8
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Eric, it would be good for your bus in the long run if you at least warm it up once in a while during the winter. Take it for at least a 15 minute drive every couple weeks so the engine warms and other moving parts move.
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Old 04-02-2016, 01:01 PM   #9
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try releasing brake putting in drive and giver her a little (not a lot). the movement may just release them.
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Old 04-02-2016, 01:15 PM   #10
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Yup, R to D and back, see if you can rock it a bit.
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