My HF 1175# trailer appears to be high in two corners (right front, left rear) and low in the opposite corners (left front, right rear). I say "appears" because I don't have a truly flat surface to set the trailer on and I can't measure it. I've measured corner to corner in the two subframes (the two halves that used to fold) and they are square. I have a 6 foot flatbar for a straightedge and everything that I can measure seems flat. I loosened the bolts holding the two subframes together but wasn't able to change anything. I was thinking the suspension was all that is left but I don't think the suspension spans both subframes, but maybe that doesn't matter.
Any suggestions here? Go ahead and loosen the suspension? How can I measure this if it indeed exists?