SANY Crane Outrigger Cylinder Parts

Cylinder components and seals for SANY truck crane outrigger systems. Outriggers are a structural safety system and the parts scale with the crane: the STC250 sits at 32.1 to 33.1 t operating weight on a 6.4 by 5.35 m outrigger span with 7 t of counterweight, while the STC500 hybrid builds carry 8.5 to 11 t of counterweight on spans up to 8.0 by 6.42 m. Nothing interchanges across the range, and the suffix matters even within one model — the STC250C5-1 and the STC250C5-8 already differ from each other in outrigger span. Outrigger cylinders carry load-holding valves and those must be replaced like for like: substituting a valve with a different cracking pressure on a load-bearing circuit is not a saving worth making. Send both the chassis nameplate and the superstructure serial number, since crane parts are documented in two separate books.