Staff Answer
Jul 27, 2026 - 07:59 AM
Based on the dimensions you provided, this arm assembly appears to be a good match.
The Dometic 3312487.006U is the standard-height arm for Dometic 9100/9200 Series Power Awnings on coaches with straight sides. The key dimensions are:
- Back (wall) channel: 65-5/8"
- Front channel: 64-7/8"
Your measurements:
- Wall bracket: 65-5/8" (matches)
- Extended arm: 49-5/8"
- Support arm: 64-3/4" (very close to the 64-7/8" front channel specification)
The 49-5/8" measurement is not one of the published dimensions for this assembly, but depending on where it was measured (pivot-to-pivot vs. overall length), it can vary.
If your existing awning is a Dometic 9100 or 9200 power awning and the wall channel measures 65-5/8", this is very likely the correct replacement arm.
To be 100% certain, either or both of the below would be helpful if it can be sent to info@hitchweb.com
- the part number from your existing arm (usually on a sticker), or
- the model number of the awning
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