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Thread: Wiper Arm Bell Crank Mount

  1. #1
    Senior Member Truck Shop's Avatar
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    Wiper Arm Bell Crank Mount

    My fix or what I came up with to repair the cowl mounting area for the wiper arm bell crank when it cracks and brakes out around
    the mounting bolts. I had a local machine shop make these for me after I came up with measurements. And here are two trucks
    out of seven I have repaired with these brackets. I gave some to a guy that had them chromed and he used them on his 379 that
    was just starting to spider crack. These brackets stopped the problem. Even after being repaired by a body shop the cowl still
    cracks out a short time later.


    Truck Shop

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  2. #2
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    That is a simple clean solution for a decades old problem, I wonder if the cowl weakness has been addressed on the 389 family cab up date ? Funny how each manufacturer has it's own fail point. Paccar really annoys me with the not sharing suspension with their cousins, And of course no darn leg room in anybody's cab, what are all cab designers 4'3" 89 # or what.

  3. #3
    Senior Member Truck Shop's Avatar
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    More than likely the cowl stayed the same on the 389. Paccar cab room has always been tight for a driver over six foot. The seat eats up the back of the cab.
    And the old A model cab the throttle pedal was damn near vertical, have seen more than one with a block of wood screwed to the floor to change the angle
    of the drivers foot. Would give you shin splints after a while.

    And the designers probably were 4'3" and because of there short inseam had to have the clutch brake adjusted 4" off the floor

  4. #4
    Senior Member Truck Shop's Avatar
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    Damn actually had a member inquire about wanting one or two of these.

    Truck Shop

  5. #5
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    Nice, clean solution.

  6. #6
    Senior Member Truck Shop's Avatar
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    Well I'll put it this way, it was the best I could come up with with not allot of time involved. Once the fiberglass breaks out where the bell crank
    is bolted it's never the same and I have yet to see anybody repair the fiberglass in that area and have it last very long.

    Truck Shop

  7. #7
    That is really neat! The experienced glass man from the boat shop has fixed ours.

  8. #8
    Hi, Truck Shop
    How do I get ahold of some Peterbilt 389 wiper arm bell crank mount support brackets ?
    Thanks
    Btw, Looks like a sweet fix

  9. #9
    Senior Member Truck Shop's Avatar
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    So people stop sending me pm's about this bell crank repair mount, I quit making them.

  10. #10
    Good repair set up, the 97 379 I was running has stress cracks started here, saw them washing the windows one of my last trips with it.

  11. #11

    Hi Here's a link on eBay that sells stainless repair brackets similar to these.

    Quote Originally Posted by DMiller View Post
    Good repair set up, the 97 379 I was running has stress cracks started here, saw them washing the windows one of my last trips with it.
    Hi Here's a link on eBay that sells stainless repair brackets similar to these.

    https://rover.ebay.com/rover/0/0/0?m...2F323878038217

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