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  1. #1
    Bobtail Member
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    peterbilt door hinge

    I have a peterbilt 379 had the door hinge wore out so I replaced it with a new one. Now for the life of me I can't get this door adjusted. If I get it slid far enough forward for it to shut it leaves a huge gap at the top of the door. If I slide it over to close the gap at the top, the door won't shut. I know it sounds simple but for some reason I'm not seeing the solution. Anyone have any experience with this?


  2. #2
    Light Load Member
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    I have replaced one before but with no issuses... i will atempt to help, but a little confused .. is it a front to back, top to bottom, in n out prob, or a combo... my first thought would be the hinge where it bolts at the cab.. is it in to far to alow the back of the door to go in far enough? I imagining this as your problem... am i close or way off base?

  3. #3
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    If the truck has a unibilt sleeper assembly the cab can shift. The top of the cab actually pushes forward when this happens. The door then no longer fits in the door frame properly. The cure is to add the 379 70" sleeper air bags under the cab and sleeper to support the cab. After this is done then you can use a hydraulic porta power in the door frames to re-align the top portion of the cab. If you try to do this without the air bags from the 70" sleeper then the cab will return back soon after you fixed it. Basically whats happening is the cab/sleeper combination is sagging at the cab/sleeper joint. The extra air bags from the 70" cab/sleeper combination support the structure where it sags. This is a common problem with the 63" unibilt sleeprs .

  4. The Following User Says Thank You to Mr. Haney For This Useful Post:


  5. #4
    Light Load Member
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    Mr. H as always if am in awe of your knoledge on many differnt topics.. i meant that seriously by the way ... anyway Happy thanksgiving buddierow... Be allright to call ya maybe this weekend to talk bout that info you may have gotten for me?... or call me when its good for ya....

  6. #5
    Medium Load Member
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    i'm having the same issue but i didn't replace anything,my door just doesn't stay completely shut.

  7. #6
    Bobtail Member
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    Mr. H I am almost completely satisfied with your answer. It sounds completely feasible. This is a '96 model unibuilt, so it doesn't even have the tall cab which I assume would add a bit more support to the cabin. These 70" airbags, do they just mount between the cab and the frame rails? Are they hard to get rigged up in there or is there a place for them to bolt on under the cab?

  8. #7
    Bobtail Member
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    I'm assuming that you chain the back of the sleeper down then portapower between the frame rails and the back of the cab. Does that sound right. Is it possible or likely that it would just sag on the drivers side or does this usually happen to both sides?

  9. #8
    Bobtail Member
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    Oh I reread your post. So you use the portapoweron the actual door frames, ok.

  10. #9
    Light Load Member
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    well , after reading mr.h's post i can tell ya why mine was cake walk ... .. mine was a daycab ... good luck with yours farm trucker

  11. #10
    Bobtail Member
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    Thanks for the post coal bucket, but I think Mr. Haney has the right idea on this one. Gonna get to work on this thing Monday, I'll report the results as they happen.

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