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Thread: 1998 M1078 A0 Wiring nightmare?

  1. #91
    4 Star General Steel Soldiers Vendor Suprman's Avatar
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    Ok. I was wondering how it ran that way.

  2. #92
    Colonel DREDnot's Avatar
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    Got it moving and took it for a short drive. Got it to shift as high as 6th gear. The initial shift from 2 to 3 takes too long, but the rest seem to shift normal. Headlight switch is bad but lights work otherwise. Air/hydraulic system raises the cab, cab lock works, air bags work. About all that's missing is the turn signal flasher unit, and I need to install the CTIS controller and see if that workshttps://uploads.tapatalk-cdn.com/201...ab3e263499.jpghttps://uploads.tapatalk-cdn.com/201...dc4e958cae.jpghttps://uploads.tapatalk-cdn.com/201...18eab6f23f.jpg

    Sent from my SM-G970U using Tapatalk
    1998 M1078A0
    1993 M998
    1986 M1009(sold)
    1992 M101CDN(sold)
    "Non Vi Sed, Arte"

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  4. #93
    4 Star General Steel Soldiers Vendor Suprman's Avatar
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    The 2-3 shift is normally like that. If you really rev the snot out of it, then it’s a little better.

  5. #94
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    Yea, you may need to have it relearn the shift points. You have come a long way with this truck.

    There is no cab lock. Are you referring to the folded bar assembly on the right frame rail? It doesn't lock the cab it keeps it from over-extending. In normal operation the cab should not tilt far enough forward to fully extend/unfold it. Did you get a big lurch out of the cab when it passed over the balance point(not supposed to do that either)? The rod end where the hydraulic cylinder attaches to the cab is dual function. It has a long slot and a short slot and a sliding cam. At the bottom the cam is aligned with the long slot to allow the cab to float on the air suspension without damaging the lift cylinder or mounts. As you tilt the cab up the cam rotates into the short slot so you maintain positive control of the cab over the balance point... The mechanism is open and needs to be cleaned occasionally lest it get clogged with debris and fail to rotate properly...

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    DREDnot (08-13-2019), tennmogger (08-13-2019)

  7. #95
    Colonel DREDnot's Avatar
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    Yes. I forgot about it learning shift points. Ill have to run it a little longer. The cab lock I was talking about is the one with the red pin that locks the cab down. Everything needs to be lubed next.

    DSCN0075.jpg
    1998 M1078A0
    1993 M998
    1986 M1009(sold)
    1992 M101CDN(sold)
    "Non Vi Sed, Arte"

  8. #96
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    Ok, now I am tracking. Still check the rod end for crap... mine was full of sand and grease
    Last edited by Ronmar; 08-13-2019 at 19:52.

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    DREDnot (08-14-2019)

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