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Old 07-17-2019, 03:44 PM   #1
Rivet Master
Al and Missy's Avatar
2002 30' Classic S/O
Fleming Island , Florida
Join Date: Nov 2013
Posts: 4,186
Repair - Fantastic Vent Won't Open

We went to the trailer today to replace some stuff that was removed in preparation for replacing the flooring. The storage area had plugged it in so I turned on the vents to pull out the hot air and turned on the AC. The front vent lift motor was turning but the lid wasn't moving. I pulled down on the knob and tried manual. No Go here either.

I dropped the motor assembly to see if the shaft wasn't engaged properly, but it was. The main shaft in the vent was turning freely. I could push up on the lid and it opened right up.

Then I noticed that there was a roll pin that was partially pulled out of the cast housing that the shaft turned in. I lifted the arm that seemed to be what raised the lid to discover that it had a half circle gear on the end. I figured out that the half circle gear was supposed to engage with a worm gear in the housing that the shaft turned and the rotational axis of the circle gear was the roll pin.

I dropped the fan body proper leaving the frame in place to get better access. With a combination of pushing rearward on the lever and wiggling it I got it so I could see the hole in the center of the gear through the side of the housing and maneuvered it as close as I could to aligning in the hole. I then used a pair of channel-lock water pump pliers to squeeze the pin back into the housing.

I checked everything to see that it worked and put it all back together.

I had always wondered if I could drive with the vents open. I think I remember us finishing a days drive and seeing the vent lid partially open when we stopped apparently having forgotten to close it before we left. My theory is that the vibration from the wind wiggled the lid and the arm enough to dislocate the roll pin. To be sure I will not intentionally drive with a vent open again, at least until I get my covers put on.

“You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO WBCCI 1322
2002 Classic 30 Slideout -S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
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Old 07-17-2019, 04:30 PM   #2
3 Rivet Member
teagues's Avatar
2008 20' Safari SE
Charlotte , North Carolina
Join Date: Feb 2007
Posts: 142
Good catch!

I had just backed into a campsite a few years when the neighbor walked over to point out that our cover was flapping with the wind. It was going from closed position, to 180 degrees back until it smashed into our roof, then closed again, back and forth... Windy day, for sure!

It took a while to figure out that the pin you mentioned had come completely loose. Fortunately, the pin and the arm both fell into the fan housing, and not onto the highway somewhere, and thanks to the very late sunset in Montana I was able to figure out how to get it all back together and duct tape the new holes in the cover before nightfall.

I never drove with the vent open that I can recall, so I'm not sure why it happened.
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