HMS Beagle wrote:
Running all four jacks at once? With a heavy camper, each can draw about 10 amps or so. That's 40 amps for four which could trip a thermal breaker. I always run the front two or back two at once, 3-4" at a time alternately going up. You could run all four going down (very low amp draw) but you have to watch very carefully as they will not run at the same speed and you'll end up on three jacks (same is true going up).
I have Rieco Titan jacks. I have one of the heaviest campers on the market and I run all 4 of my RT jacks together while raising the camper. I never had any "cut out" issues with my jacks.