If you have a loader or hoe or pretty much anything around that can lift high enough just run a chain down under the pan coming up both sides. If the belly pan is hinged at the back end it will easily drop down and you can lift it back up. I have also lowered pans with a floor transmission jack that I bolted some 4 foot pieces of angle iron to in order to keep everything stable. Come a long on the canopy and chain underneath and up the other side works too. Just kind of crude on the paint. Another method I have not tried but told of was to use long threaded rod. Take a bolt out, thread in the ready rod, spin a nut up and then do it on the other side. Take all the bolts out and lower. Like I said I have not tried that method and it certainly sounds the most painful. Cheers. B