Sagging is normal on older slide covers and you should make a support to keep the water out of the sagging area.
Slide out awning tension adjustment.
There are two main manufacturers of slide topper awnings dometic a e and carefree of colorado.
You can leave the support arms hanging freely but it might help to simply slide the stops back into the leg channel.
The following link will take you to a document that describes the proper and safe procedure for adjusting the slidetopper tension and replacing fabric.
Step up to the awning and clear out any leaves or twigs from the awning seam.
When you release the tension in the spring the cotter pin that is inserted in the holes in the awning arms are removed.
You do not need to put the screws back in.
Depending on the make and model there is a different method to adjust the tension.
Roll the awning back up to observe how tight it is.
Park the rv and set the brake.
How to adjust the tension on an rv slide out awning step 1.
If your rv slide out awning is equipped with an air bladder use the internal air pump and flip the switch to on to inflate and add tension to the fabric.
Inflate the awning s air bladder to provide tension to the awning fabric.
Reattach the rear awning leg and lower both leg sections completely.
If you are satisfied move on.
There is a fine line on slide awning tension for correct extension of room and correct tension on the cover.
Since you do not tell me who manufactured your slideout topper awnings it will be very hard for me to tell you how to adjust the tension on them.
The spring tension on the slide topper can be adjusted but you must do it carefully because there is considerable energy in the stored spring if it were to get away from you.
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Place the step stool near the lip.