A cracked, faded, or missing head block cover does more than look bad -- it exposes the pivot hardware inside your Solera Regal awning arm to road debris, UV radiation, and water intrusion. Lippert part 643918 is the direct OEM replacement, snapping back into place to restore a clean finished appearance and shield the arm's internal mounting hardware from the elements.
The Solera Regal is one of Lippert's premium awning arm systems, found on a wide range of Class A motorhomes, fifth wheels, and travel trailers. The head block cover sits at the upper pivot point of each awning arm, concealing the mounting hardware and providing a finished curbside appearance. When this cover cracks or breaks -- common after years of UV exposure and road vibration -- it leaves the arm internals unprotected and the rig looking worn.
Lippert 643918 is the genuine OEM part, meaning it uses the same material, color match, and snap-fit geometry as the original cover that came on your coach. No trimming, no adapters, no improvised fixes -- it clips into place and looks like it belongs there, because it does.
Engineered to the original Solera Regal arm specification. No drilling or modification required.
Matches factory color on white-trimmed Solera Regal awning arms. Resists fading and chalking.
At 0.37 lbs., this cover adds virtually no weight while restoring full coverage to the pivot area.
Seals out moisture, road grime, and debris that can accelerate wear on internal arm hardware.
The head block cover protects the pivot bolt, bushings, and arm casting at the point of greatest mechanical stress on your awning. A missing or cracked cover allows water to sit in the pivot cavity, which accelerates corrosion on the arm hardware. In climates with road salt or high humidity, this can shorten arm service life significantly. A new cover is a low-cost way to extend the life of a much more expensive assembly.
This cover is designed specifically for the Solera Regal awning arm system sold under the Lippert brand. The Solera Regal uses a distinct head block geometry that differs from other Solera product lines (such as the Solera Flat, Solera Pro, or standard Solera arms). Before ordering, confirm your awning arm label reads "Solera Regal" or cross-reference your coach's build sheet against Lippert part 643918. Vendor cross-reference: 72-4484.
If the head block cover cracked from UV stress, inspect the rest of the plastic components on your awning arm at the same time. Common companion parts on Solera Regal arms include the lower arm end cap, the arm tension spring, and the awning fabric itself. Addressing multiple wear items in one service session saves labor time and keeps your awning system looking uniform.