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Lockers Disconnected

Discussion in 'Peterbilt Forum' started by Hogleg, Jan 14, 2017.

  1. Jan 14, 2017 #1
    Hogleg

    Hogleg Medium Load Member

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    Nov 20, 2016
    Salem, Illinois
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    1978 Pete 359 with Rockwell SQHD tandems. Original axles to truck (verified by serial numbers on peterbilt build list for the truck). Locker switch on the dash (air switch). Found out that it is disconnected inside the dash and the line is capped. Is there a good reason that this was disabled? Were the PO farm hands using it too much like a 4x4 in the fields? What am I risking in hooking it back up assuming there is not a leak in the air lines going back to the axles? Could have used it this week in a altercation with muddy conditions.

    John
     
    Last edited: Jan 14, 2017
    Reason for edit: typo
    Hogleg, Jan 14, 2017
    Hogleg, Jan 14, 2017
    #1
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  3. Jan 14, 2017 #2
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Hook it up chalk the wheels and release the parking brake. Jack up any one of the axle end tire assemblies and trans in neutral. With the power divider unlocked tires should turn by hand. P/D locked they should not and make sure they unlock. Good to go.
    Some differentials also have axle locks which lock the the axles on both sides on the same differential together. All of the ones I have seen had a P/D switch and a seperate axle lock switch but have read of veryations to that. Never saw anything but the P/D lock on the SQH series.
     
    BoxCarKidd, Jan 14, 2017
    BoxCarKidd, Jan 14, 2017
    #2
    Wymon Thanks this.
  4. Jan 14, 2017 #3
    AModelCat

    AModelCat Road Train Member

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    Biggest risk could be a torn diaphragm, which could pressurize the housing if the vent is plugged.
     
    AModelCat, Jan 14, 2017
    AModelCat, Jan 14, 2017
    #3
    Wymon Thanks this.
  5. Jan 14, 2017 #4
    Wymon

    Wymon Light Load Member

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    Jan 13, 2013
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    I bought a parts truck a while back that had the power divider switch blocked off-didn't think anything of it at first, but when I pulled the drop-ins (SSHD) to use on another truck I found that the front and rear were different ratios-it kind of made sense then!
     
    Wymon, Jan 14, 2017
    Wymon, Jan 14, 2017
    #4
    BoxCarKidd Thanks this.
  7. Jan 14, 2017 #5
    AModelCat

    AModelCat Road Train Member

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    Whoa! Lucky catch there! Bet those poor spider gears in the power divider were worn right out lol.
     
    AModelCat, Jan 14, 2017
    AModelCat, Jan 14, 2017
    #5
    Wymon Thanks this.
  8. Jan 15, 2017 #6
    Wymon

    Wymon Light Load Member

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    Yep-pretty much toast! Not one of my better investments!
     
    Wymon, Jan 15, 2017
    Wymon, Jan 15, 2017
    #6
    Hogleg and Dye Guardian Thank this.
  9. Jan 15, 2017 #7
    Hogleg

    Hogleg Medium Load Member

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    Nov 20, 2016
    Salem, Illinois
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    Wymon,

    Good point. I confirmed that the first axle serial number was correct. Did not crawl under to check the second, just assumed it to be there. Will check. Thanks for the info!

    John
     
    Hogleg, Jan 15, 2017
    Hogleg, Jan 15, 2017
    #7
  10. Jan 15, 2017 #8
    Hogleg

    Hogleg Medium Load Member

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    Nov 20, 2016
    Salem, Illinois
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    dup
     
    Hogleg, Jan 15, 2017
    Hogleg, Jan 15, 2017
    #8
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