三一重工 QY 50 C

The SANY QY50C is a classic 50-ton class truck crane, and its counterweight system is critical for safe heavy-lifting operations. 1. Core Counterweight Data Total Counterweight: 12.0 tons Fixed Counterweight: 8.0 tons (bolted to the rear of the turntable, non-removable) Removable Counterweight: 4.0 tons (modular cast iron blocks, adjustable per job requirements) Structure: High-density cast iron blocks (1–2 tons per block) with locating pins and lifting eyes, which must be fully locked during operation. Proportion: Accounts for 28.6% of the total machine weight (42 tons), a typical ratio for large-tonnage truck cranes. 2. Counterweight vs. Lifting Capacity 表格 Working Condition Counterweight Configuration Max Rated Lifting Capacity Basic boom + minimum radius Full counterweight (12 tons) 55 tons Basic boom + minimum radius Fixed counterweight only (8 tons) Approx. 40 tons Fully extended main boom (42.5m) + medium radius Full counterweight (12 tons) Approx. 12 tons 3. Key Safety Notes Full counterweight is mandatory for maximum load: The 55-ton maximum lifting capacity is only achievable under full counterweight + fully extended outriggers + solid ground conditions. Never reduce counterweight for critical lifts: When using a jib, in high winds, or on soft ground, the counterweight must remain intact to avoid tipping. Transport compliance: The QY50C can travel with full counterweight (12 tons) without additional disassembly, meeting road axle-load regulations. Pre-operation inspection: Always confirm that counterweight locking pins are fully engaged to prevent detachment during travel or lifting.