2014 Thor Palazzo 33.3 Shade Parts: Auto Stops & Large Springs

The correct spring and auto stop cannot be confirmed from the 2014 Thor Palazzo 33.3 model, a 60-inch shade description or a previous spring not fitting. Identify each blackout and screen shade's manufacturer, series and installed mechanism first; check the two shades separately.

For an identified compatible Irvine Slow-Rise system, the manufacturer's spring chart places shade widths of 60 inches and above in the Large category. That is shade width, not drop, tube diameter or spring length. It does not establish the installed system. The current spring listing is described for 2019-and-newer premium shades and calls for separate confirmation on older systems. This answer does not approve that spring for an original 2014 installation or declare it incompatible.

Measure the exposed aluminum tube's outside diameter, not its inside opening, fabric roll or end cap. Record shade width and drop separately, and compare the existing assembly length, end fittings, markings and attachment details. Irvine's reference distinguishes Slow-Rise auto stops from Valu-Line 1-inch and 3/4-inch versions. The RL-A3100 listing is a comparison reference, not confirmation that it fits your shades. An upper-stop fault and a spring/raising-speed fault are separate identification questions.

Provide label photos and clear views of each tube end, broken auto stop and old spring next to a ruler. Have the identified shade manufacturer or a qualified shade service professional confirm the exact assemblies before ordering or working on a tensioned spring. No particular part, full repair or fit guarantee is established here.