Definitely clean and lube the hydraulic rams as the first step. The zerks on the jacks need grease (but not all Power Gear jacks models have the zerks).
If that doesn't do it, I would start looking at the valves for the rear jacks. They control the flow of hydraulic fluid to the individual jacks.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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