manual retract slides on 2004 cardinal 29LE

[hollywoodeast]

Hi, First time RC owners and we need to move our camper down the rood and wanted to retract the slides but they won't retract with the switch. It is a hydraulic system, we can hear the motor working but nothing happens. we will try with a new battery and add some fluid but does anyone know how to manually retract the slides if we have to resort to that. Thank you so much

2004 Forest River Cardinal 29LE