Forum Discussion

nick_m's avatar
nick_m
Explorer
Aug 30, 2018

Happijac alignment issue

Hello campers,

I recently installed Happijac swing outs on a 2010 EC850. When I extend the jacks while unloading, the foot of the driver's side jack sits 1-1/2" closer to the rear jack than does the passenger side. I purchased the camper new, and I"m not aware of any damage. The brackets show no sign of disturbance, and the jack leg is straight. None the less, the passenger side jack is parallel to the corner of the camper, but the driver's side is tilted back.

I spoke with Happijac support and confirmed that the swing outs were installed correctly, and that no adjustments are possible between the brackets (L and Z), the swing out and the jack. The tech was reading from a script that didn't address my issue. He said that, while the tilt wasn't good, it wasn't necessarily bad.

It seems like the only way to correct the tilt is to shim the Z-bracket and remount everything.

Is that amount of deflection within the acceptable range? If not, is shimming the Z-bracket the best approach?

Thanks,
Nick
  • Are the holes in both plates square? Or just the plate with the bolt head?
  • BradW wrote:
    https://www.youtube.com/watch?v=Vy6gKROASGQ

    Can you loosen the bolts make some adjustment and then retighten them? There will be some slop in those bolts holes that may give just enough movement to get things lined up. If not, maybe a few strokes with a rat-tail file will get you what you need.

    Bradw


    The bolts have square shoulders, so they force-center into the holes - that's how they keep the faces from rotating. No adjustment is possible. I was thinking of grinding off the shoulders on the swing out bolts and opening up the holes in the brackets to get more play. To prevent rotation, I could dowel the swing out and the brackets using 0.250" pins.

    I really want to avoid having to shim the Z-bracket, because that might require new holes next to the old ones in the corner of the camper.
  • https://www.youtube.com/watch?v=Vy6gKROASGQ

    Can you loosen the bolts make some adjustment and then retighten them? There will be some slop in those bolts holes that may give just enough movement to get things lined up. If not, maybe a few strokes with a rat-tail file will get you what you need.

    Bradw