The most promising lead is from Sumitomo Heavy Industries Construction Cranes (HSC). They manufacture an “HLX” series of crawler cranes, which includes models like the 800HLX (80t capacity) and 1500HLX (150t capacity) . A logical “HLX-500” could be a model in this family, but the available data does not list it. The HLX designation typically signifies the “High-Lift” or “Heavy-Duty” variant of their standard crawler crane line .

Given the lack of specific data for an “HLX-500,” it is possible there is a minor error in the model number (e.g., it could be an 800HLX or a model from a different manufacturer). Alternatively, it may be a very new or niche model not yet widely documented in the provided search results.

Other Products Found with the Name “HLX-500”:
Donner HLX-500 Electric Guitar: A headless electric guitar from Donner, known for its compact design and modern features .

Fire Hydrant HLX-500: An identifier for a specific fire hydrant in a Kentucky dataset; this is a location marker, not a product for sale .

Smart-AVI HLX-500 HDMI Extender: A device for extending HDMI signals over long distances via LAN cables .

The Terrain Crane You Might Be Looking For:
If you are looking for an off-road capable (rough terrain) crane, the specifications of models from other manufacturers might be helpful for comparison. For example, the Terex TRT 50 is a 50-ton rough terrain crane with a 37.4m main boom, which falls in the same capacity class that an “HLX-500” might represent . Similarly, the XCMG XCR50_E is a 50-tonne capacity rough terrain crane .