Your hydraulic fluid level looks low. The fluid level should be at least half way up the reservoir. Top it up and see if that helps. You may have to cycle the system a few times to purge the air.
Is this like your system? http://www.lci1.com/images/Flyers/L...draulic-slide-out-stabilizing-enhancement.pdf
Is this like your system? http://www.lci1.com/images/Flyers/L...draulic-slide-out-stabilizing-enhancement.pdf