I read it once..
The manual details what valves to manually open and close and then you can use a drill to run the pump to bring up the jacks. It sounded like something I did NOT want to do and I stored the bit of info that it was somewhere in the manual in the back of my head for Just in case!
Sorry I don't have the manual as it is in the unit in winter storage.
I think if you google the jack manufacture you can get the manual on line in a pdf format.
Lee and Neva
2015 Ceder Creek 36CKTS