Off road camper trailer - shackle problems!

Hi All,

We recently got home from a tip to Fraser Is with our brand new camper trailer. Within two minutes of leaving home the shackles inverted and brought the whole trailer forward ending up with the body of the trailer sitting on the wheels and smoke pouring off them!

The manufacturer came straight out and did a rough fix to get us back to his workshop where they moved the position of the shackles back. We didn't have a problem again on our 10 day trip but have lost a bit of confidence with the set up. He told us that he hadn't set up the shackles to suit the heavy load we were carrying (well under the 1800kg that the leaf springs are rated to carry). He mentioned that since he has moved the shackles they may not be suitable when we are carrying a lighter load?? I didn't think it was unreasonable to expect the camper to be set up to carry either a small amount for a short trip or a large amount for a longer trip... Should it not be capable of carrying anything up to 1800kg (inc the trailer itself of course)?

We are taking the camper back soon for a service and to discuss the suspension issues but just wanted some opinions first. I hope this all makes sense, camper trailer suspension is most certainly not my area of expertise!!

Thanks,
Jess