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Advice on Air Disk Brake Change

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Bob.g, Dec 29, 2015.

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  1. Dec 29, 2015 #1
    Bob.g

    Bob.g Light Load Member

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    I own a 2011 Freightliner Cascadia with disk brakes. When i went to a repair shop the mechanic told me that I need to change my disks, calipers, and pads. I looked at my service record and saw that they were all changed and 750,000 KM. I bought the truck when it was at 850,000 and put less then 100,000 Km on it. Im not sure if they are trying to scam me or if they need to be changed. My question is do the calipers need to be changed too? They told me they are 1300 each
     
    Bob.g, Dec 29, 2015
    Bob.g, Dec 29, 2015
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  3. Dec 29, 2015 #2
    Hurst

    Hurst Registered Member

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    Can you look at the rotor to see if they are grooved or measure the thickness?

    I dont know much about air disc brakes,.. but its my understanding that the calipers are not like hydraulic calipers,. as in the force use to apply the pads are done via the arm from the air chamber the same as shoes would be in a drum application. So in my opinion,.. unless there is physical damage or some some severe wear,.. I can not see where the calipers would need replacement. The rotors you should be able to visually see when they need replacement.

    $1300 each is pricey. I had all my drums and shoes replaced on mine for $1200.

    Hurst
     
    Hurst, Dec 29, 2015
    Hurst, Dec 29, 2015
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  4. Dec 29, 2015 #3
    123.Red Beard

    123.Red Beard Bobtail Member

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    If they need to be replaced, as in they are worn out ... Somebody has been riding the brakes, or they got stuck on!

    They should last much longer than that!
     
    123.Red Beard, Dec 29, 2015
    123.Red Beard, Dec 29, 2015
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  5. Dec 29, 2015 #4
    rollin coal

    rollin coal Road Train Member

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    You need to educate yourself about your disc brakes so people won't take advantage of you. I thought the big benefit to discs was low maintenance and the pads last a really long time. Pads and rotors need measuring. Calipers sometimes need replacing too not sure what issues you would have there I don't have discs. But it sure sounds like a rush to judgement them saying you need to replace all calipers and everything around the unit now. @wichris is the only person I know with disc brakes on several of his trucks/trailers.
     
    rollin coal, Dec 29, 2015
    rollin coal, Dec 29, 2015
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  7. Dec 29, 2015 #5
    Cat sdp

    Cat sdp . .

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    Cat sdp, Dec 29, 2015
    Cat sdp, Dec 29, 2015
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  8. Dec 29, 2015 #6
    sdaniel

    sdaniel Road Train Member

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    Sound like the shop thinks they found a sucker!
     
    sdaniel, Dec 29, 2015
    sdaniel, Dec 29, 2015
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    Another Canadian driver, Bob.g and Derailed Thank this.
  9. Dec 29, 2015 #7
    Bob.g

    Bob.g Light Load Member

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    They said one pad is more worn out then the other, but under my understanding the first pad hits the disk and moves it to the second pad. Im not sure if who would know about this
     
    Bob.g, Dec 29, 2015
    Bob.g, Dec 29, 2015
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  10. Dec 29, 2015 #8
    daf105paccar

    daf105paccar Road Train Member

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    OP type in knorr bremse in google.Select disk brakes.
    There will be a button download documentation.Look for the service manual.Read it. But 200 000 and all need replacing???Either somone did very bad things or the dealer wants to earn lots off money.Anyway there is very bad smell coming from this story.Do you have any pictures?
     
    daf105paccar, Dec 29, 2015
    daf105paccar, Dec 29, 2015
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  11. Dec 29, 2015 #9
    Bob.g

    Bob.g Light Load Member

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    Im at home now but i checked the indicator of the pads and it wasnt even 25% used and they still are pretty thick. The brakes were good when i got the truck and I tend to take care of my brakes. I haven't heard about changing the calipers though. Everything was changed 200 000Km ago. Do the calipers get changed at a certain millage?
     
    Bob.g, Dec 29, 2015
    Bob.g, Dec 29, 2015
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  12. Dec 29, 2015 #10
    Bob.g

    Bob.g Light Load Member

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    And is it normal for one side to be more worn then the other?
     
    Bob.g, Dec 29, 2015
    Bob.g, Dec 29, 2015
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