I extended all the jacks and retracted them using the manual valves. Then I followed the RVA website trouble shooting by extending all the jacks, cleaning them and spraying them with WD40. Then I extended and retracted them all 3 times to bleed any possible air. Now all the jacks hold solid at their extended lengths.
Thanks for the advice.
Diplomat 40PDQ 2005
Jeep Cherokee toad
2005 Diplomat 40PDQ, Jeep Cherokee Toad
Randy, Pam & Rascal (150lb Rottweiler in a Jack Russell Terrier body)