Walking beam suspension allowance

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Mr79W900A, Jul 24, 2021.

  1. Mr79W900A

    Mr79W900A Light Load Member

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    88E73770-BAED-43F8-A5A6-13467760987B.png Hey guys I got my truck in the shop for cvi and they are calling the walking beam saying center pounded out and outside ends weather cracked. But the suspension doesn’t walk more than a half tire out loaded still... are these not allowed to crack as long as they are in tolerance?? That was my understanding. Shop seems not experienced as I explained this to them. Here’s a pic they sent.
     
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  3. Oxbow

    Oxbow Road Train Member

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    On mine the bushings are weather-checked on the outside but still in place, and it walks out a bit when turning loaded. I would think the only way to disqualify them would be to measure walkout, but I have no idea how much would be allowed.

    There probably aren't many shops that deal with them anymore, but I don't think they are terribly expensive to have re-bushed if you think you might be getting close anyway.

    I'll run out and take some photos of mine for comparison.
     
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  4. Oxbow

    Oxbow Road Train Member

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  5. Oxbow

    Oxbow Road Train Member

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  6. Slowpoke KW

    Slowpoke KW Road Train Member

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    I don’t know the specifics of a walking beam but I have found that some folks see cracking in rubber bushings and automatically say it’s bad until they are forced to check for movement then find none.
     
  7. AModelCat

    AModelCat Road Train Member

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    I wouldn't call weather cracking like in Oxbow's picture a big deal. Now pounded out and sloppy is another thing.
     
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  8. AModelCat

    AModelCat Road Train Member

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    I'm not even sure where my old books ended up. They'd have some good information. Might have been lost when I moved :(
     
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  9. IH Truck Guy

    IH Truck Guy Road Train Member

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    Yous guys should get gold medals for driving them rough riding trucks. :D:D
     
  10. Oxbow

    Oxbow Road Train Member

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    With 55k on the drives it's not bad!

    Empty on washboards is a different story.
     
  11. Flint1

    Flint1 Medium Load Member

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    Here is a screenshot of the most current Alberta cvi manual regarding walking beams. As I read it you are allowed 7mm clearance on the cross tube bushing.

    I'm not sure about bc, but alberta cvi manuals are a free download from service alberta.
    Screenshot_20210724-191450_Office.jpg
     
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