Hello Mr. Wilson, what kind of system is on your coach? Electric, hydraulic? Brand name?
If hydraulic, check the pump for the fluid level. Some have fuses at the pump (ours does not). If electric, make sure your house batteries are fully charged. Since you give very little information, with your system, you might need to make sure that the parking brake is fully engaged.
Try starting the generator, let it run for a while to charge the batteries, then give it a try.
Good luck,
MM.
Mr.Mark
2021.5 Pleasure Way Plateau FL Class-B on the Sprinter Chassis
2018 Mini Cooper Hardtop Coupe, 2 dr., 6-speed manual
(SOLD) 2015 Prevost Liberty Coach, 45 ft, 500 hp Volvo
(SOLD) 2008 Monaco Dynasty, 42 ft, 425 hp Cummins