Dumping air bags

Discussion in 'Ask An Owner Operator' started by Hayfieldmn, Mar 23, 2019.

  1. Snailexpress

    Snailexpress Road Train Member

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    Now let's talk seriously how empty suspension air bags will destroy your truck.
    Truck suspension designed to sit in certain height what they call ride height and play up or down little bit to absorb road bumps and keep traction plus driver comfort. Suspension will never hit the bottom end in normal operation, it's out of range position.
    Two cross torsion bars will push axles in opposite directions destroy bushings, twisting springs as a result whole alignment. Slowly but steady, night by night.
    Twisted spring bushings will change axle pinion angle. You can't see it without instruments. Now you have drive line components out of alignment. Watch this video for better understanding.

    Jerking drive line will destroy clutch and rear ends, cause gear grinding if you do slide .
    IMG_20150612_103142.jpg
    This clutch was installed 5 months ago on my truck with leaky air system. Total expenses were around 10K - unnecessary 2 injectors replacement plus clutch replacement twice. Fix price was $38 for leaky plastic crap manifold.
    I wont mention about tire out of alignment life and driver comfort.
     
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  3. 201

    201 Road Train Member

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    high plains colorado
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    Well, some of what you say is true, if you drive the truck with no air, but just sitting doesn't hurt it. Also, that clutch disc, those springs break with just normal use. It's a ploy to sell more clutch jobs. I went through 2 clutches like that, both times, the springs broke, and 6 months apart, I went back to the parts place, and said, you can cram these discs, the guy said, well, you can go with "extreme duty" disc, no springs, but a bit rougher engagement, I said, lay it on me, never had a clutch problem again!
     
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  4. Gdog66223

    Gdog66223 Road Train Member

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    Kinda like loosening your belt when you got a big gut... feels good don't it to let that gut free... Well your truck feels the same way.
     
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  5. S M D

    S M D Road Train Member

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    sacramento ca
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    They’re made to do exactly what they do. No need to do anything extra lol. Unless you’re driving my truck then in a couple hours the bags are dumped by them self ahaha
     
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  6. adayrider

    adayrider Road Train Member

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    LOL My truck does all the above as well in a couple hours. What's the the big discussion about? If I sit in line somewhere more than a hour I have to build air to move up. And the one about rolling down the dollies with heavy load over the weekend is the same. Not hurting thing sitting there compared to running down the rough ### road. Sitting in the driveway without the dollies down is a sigh of relief compared to.
     
  7. stillwurkin

    stillwurkin Road Train Member

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    You kinda lost me when you refer to clutch went bad in 5000 miles..because of leaky air system?
     
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  8. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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    When I refurbished my truck, I replaced everything dealing with brakes, bearings, driveshaft joints, and all 8 airbags along with the upper mounts and leveling valve. Suspension never did stay up over the weekend. After a complete check of air lines / fittings I found the leveling valve was bypassing through the exhaust. New leveling valve and same problem....... it does happen even with new parts.
     
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  9. PE_T

    PE_T Road Train Member

    Air leaks are normal and legal, but to a certain extent. A truck, that is showing low PSI (under 70) after a 10 hr break, does in fact have an air leak, and it will not pass a DOT air leak test.

    I used to have air leak problems and many times mechanics couldn’t find them. Now, I never pay for air leak repairs. I have been able to do them all by myself. Trust me. If a mechanic can’t find the air leak, he doesn’t have enough experience or at least when it comes to identifying air leaks in a truck.

    I posted a couple comments here on how to look for air leaks yourself (for starters).

    Suspension air bags deflating
     
    Last edited: Mar 25, 2019
    Reason for edit: More info./Spelling
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  10. adayrider

    adayrider Road Train Member

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    I think you meant to say -it will DOT air leak test.
     
  11. PE_T

    PE_T Road Train Member

    I’m not understanding. I meant to say if DOT performs an air leak rate test on the truck, it will likely not pass. Here are two air leak tests found in the TX CDL manual. I must admit they have never performed these tests on me, but I have never had a level 1 inspection.
     

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