Originally Posted by lwherron
<<snip>>... the master tube looked to be bent down. Lubed the zerks.
Any ideas how to straighten the master tube? <<snip>>
If the tube is not pinched, a modest bend should not create that much resistance - especially if you just greased it. I believe the cable running though the tubes makes a 90 degree turn at each corner, so a modest change of direction should not make that much difference - unless there's more to the sag in the pipe than you described.
With that assumption, I'd suggest looking more deeply for another cause. If something is binding - or dragging due to no lube, a cable off a pulley, or some other reason, you might damage or break the cable and pipe system, and that could turn this into a nasty, expensive repair.
I don't know that your lift mechanism is represented in this diagram/description - https://www.customcylindersintinc.co...f-lift-systems
- but this gives you an idea of the complexity of a typical lift (Goshen system).
You might Google the precise data for your camper (make/model/year/other) and see if you can get an exact match for your lift. From there, you may be able to download a detailed manual or diagram that will point you to potential trouble spots.
As for jacking the tube, the one thing that could ruin your day would be to crush or kink the tube. If you can't muster the strength to straighten the tube with your hands, I'd be concerned that the tube - perhaps made from material similar to thin-wall conduit - could get crushed, kink, or even crack.
If you try this, you might make a "cradle" for the tube with about 12" of 2"x4" with a groove in the board to nest the tube. If you have bench tools like a table saw, you already know how to do this. If not, take a circular saw and a rip guide and make repeated cuts, about 1/2" deep, side by side, in the center of the 3 1/2" wide side of the board. MAKE THE GROOVE IN A LONGER BOARD FIRST AND THEN CUT THE BOARD TO LENGTH.
Once the groove is just barely wide enough to fit the tube SNUGLY, place it on the underside of the tube and GENTLY begin jacking. Unless there is open space above to tube to allow it to go slightly beyond straight, when you release jack pressure, it will spring back to a slight sag, but that would certainly be straight enough.
One other suggestion. Call a Rockwood dealer SERVICE DESK and ask if the sticking lift is a problem and where to look first. I've had VERY good luck getting phone advice by telling the dealer (truthfully) that I live more than an hour from the dealer. If I need proprietary parts, I order from them and have them mailed/shipped. They've never refused to help me with a DIY repair. I'm not sure when Forest River bought Rockwood, but be prepared for the fact that Forest River dealers may not be completely familiar with older Rockwoods. But if they've seen the problem a few times, they may know where to point you.