It shows symptoms of being hit dead center in the past, with the floor too high. Also looks to me like it needs to be adjusted forward. If it will go forward, do that first.
If you can push down on a corner, does the opposite corner rise or stay the same? If it rises, there is a gap between the rubber lid bumper and the body. The fix is lowering the latch. If all downward adjustment is used up, the center support is probably too high. See sentence #1.
|