Mine is doing the same thing. My problem goes beyond greasing. I have purchased new front jacks but not knowing there are two different lengths of course I bought the shorter most common ones. At this time I only have about 6 inches of movement up or down. My project for tomorrow is to remove the jacks, take them apart and switch the gears, bearings, shafts and thrust washer from the new ones into the old housings. As near as i can tell they should all fit. Heartland in their infinate wisdom did not provide any zerk fittings for greasing nor did they mention anything about the need to do this. But then it wouldn't have mattered anyway as the street side jack is in a sealed compartment with no access. I had to remove the sheet metal wall in front of the propane tank to gain access. I cut it out and left a one inch flange all the way around to attach a new panel to with sheet metal screws. I'll let you know how the repair goes...Don