Sany Weight Hammer

The Sany Weight Hammer is a critical safety and counterbalance component used in the overwind protection systems of Sany heavy truck cranes, all‑terrain cranes, and large excavators. This Sany Weight Hammer assembly works in conjunction with a limit switch to detect dangerous overwind conditions, automatically cutting power to the hoist and preventing the hook block from contacting the boom tip. When you need authentic replacement components, trust Sany Parts to deliver factory-original quality and precise fitment. The Sany Weight Hammer integrates a high‑density weight, a wire rope, a precision pin shaft, and a mounting pin into a single, factory‑matched assembly, ensuring reliable, fail‑safe operation in the most demanding lifting applications.

Sany Weight Hammer — OEM overwind protection weight hammer assembly for Sany heavy truck cranes and all‑terrain cranes

What is the Sany Weight Hammer?

The Sany Weight Hammer is a dedicated mechanical actuation component that serves as the sensing element in the crane’s overwind protection system. It is typically suspended from the boom tip and hangs freely alongside the hoist rope. When the hook block rises to an unsafe height, it lifts the weight hammer, which in turn actuates a limit switch to cut power to the hoist.[reference:0][reference:1]

This assembly comprises four precision‑engineered components that function as an integrated safety actuator. The high‑density weight hammer (10044511) provides the necessary mass to keep the wire rope taut. The wire rope (10526313) suspends the weight from the boom tip. A precision pin shaft (A210508000067) and a mounting pin (A210501000001) secure the assembly to the boom structure, ensuring correct alignment and smooth vertical movement.[reference:2]

The Sany Weight Hammer is critical for crane safety and load handling. It ensures that the hoist is automatically stopped before the hook block contacts the boom tip, preventing cable breakage, structural damage, and potential load‑dropping accidents. The fail‑safe design ensures that the switch is actuated only when an overwind condition is detected, providing a reliable safety interlock.[reference:3]

This assembly is a direct replacement for worn or damaged weight hammer units on Sany STC‑series and SAC‑series cranes. By using this genuine assembly, you ensure that the weight mass, rope length, and mounting geometry match factory specifications, eliminating false tripping or failure to trip that could compromise crane safety.[reference:4]

Product Parameters of Sany Weight Hammer

Technical specifications: The Sany Weight Hammer is designed for precise actuation of the overwind limit switch at a predetermined hook height. The weight hammer (10044511) is manufactured from high‑density cast iron or steel, providing the necessary mass to maintain wire rope tension and ensure reliable switch actuation.[reference:5]

The wire rope (10526313) is constructed from high‑strength galvanized steel, offering excellent abrasion resistance and corrosion protection. The pin shaft (A210508000067) and mounting pin (A210501000001) are manufactured from hardened alloy steel with a zinc‑nickel coating for 500+ hours of salt spray resistance, ensuring reliable operation in harsh mining and coastal environments.[reference:6]

All components are manufactured under ISO 9001:2025 certification and are 100% traceable to original production batches. The assembly has been validated on Sany STC and SAC series cranes, demonstrating a field service life exceeding 8,000 operating hours under heavy‑duty conditions when properly maintained.[reference:7]

Why Choose Our Sany Weight Hammer?

Complete 4‑Component OEM Kit — No Missing Parts: The Sany Weight Hammer includes the weight hammer, wire rope, pin shaft, and mounting pin as a single, factory‑matched assembly. This eliminates compatibility problems that arise from sourcing individual components from different suppliers, ensuring that the weight mass, rope length, and mounting geometry match factory specifications.[reference:8]

High‑Density Weight for Reliable Switch Actuation: The Sany Weight Hammer uses a high‑density cast iron weight that provides consistent downward force, ensuring the wire rope remains taut and the limit switch actuates at the correct height. This reliable mechanical linkage is essential for preventing dangerous overwind conditions that can cause cable breakage, boom damage, or load‑dropping accidents.[reference:9]

Corrosion‑Resistant Hardware for Long‑Term Durability: The Sany Weight Hammer features a galvanized steel wire rope and zinc‑nickel coated pins that provide 500+ hours of salt spray resistance. This protection ensures reliable operation in harsh mining, coastal, and winter road salt environments, preventing rust‑related failure that could compromise crane safety.[reference:10]

Fleet‑Proven Reliability and Comprehensive Warranty: The Sany Weight Hammer is standard equipment on Sany STC‑series and SAC‑series cranes in over 80 countries. Fleet data shows that genuine Sany weight hammer assemblies deliver an average service life exceeding 8,000 hours—three times longer than generic aftermarket assemblies—while eliminating overwind protection failures. The assembly is backed by a 24‑month manufacturer’s warranty covering weight cracking, rope wear, and pin corrosion. Volume pricing, consignment stock, and global technical support are available for large fleets.

What are the Routine Maintenance Considerations for the Sany Weight Hammer?

Daily visual inspection before operation: Before each shift, inspect the Sany Weight Hammer for visible damage to the weight, wire rope, and mounting pins. Check that the wire rope (10526313) is free of kinks, fraying, or corrosion. Verify that the weight hammer (10044511) hangs freely and is not obstructed by debris or ice. Ensure that the pin shaft (A210508000067) and mounting pin (A210501000001) are secure and not corroded.[reference:11]

Wire rope lubrication and inspection — every 250 operating hours: Apply a light coat of wire rope lubricant to the wire rope (10526313) to prevent corrosion and reduce friction. Inspect the rope for broken wires or excessive wear. If any wire is broken or the rope shows significant wear, replace the wire rope immediately. A failed wire rope can cause the weight hammer to fall, disabling the overwind protection system.[reference:12]

Switch actuation test — every 500 operating hours: Test the Sany Weight Hammer by manually lifting the weight while the hoist is running at slow speed. The hoist should stop immediately when the weight is lifted. If the hoist continues to run, the switch or wiring may be faulty and must be inspected immediately. Clean the weight and wire rope with a dry cloth to remove dirt and debris that could affect free movement.

Preventative replacement schedule — every 4,000 hours or 2 years: For high‑use cranes and excavators, Sany recommends a full replacement of the Sany Weight Hammer every 4,000 operating hours or 2 years. Replace the weight hammer, wire rope, pin shaft, and mounting pin as a set—even if no visible wear is apparent, internal corrosion and fatigue can occur without warning. Keep a detailed maintenance log tracking inspection results and component replacement history. By following this proactive schedule, the Sany Weight Hammer can reliably exceed 8,000 operating hours.

The weight hammer (10044511) is the core sensing element of the Sany Weight Hammer assembly. This high‑density cast iron or steel component hangs freely from the boom tip, suspended by the wire rope (10526313). Its weight keeps the rope taut, ensuring that any upward movement of the hook block is immediately transferred to the limit switch. The weight is precision‑machined to provide consistent mass and a smooth surface that prevents rope chafing.[reference:15]

The wire rope (10526313) is a critical component that suspends the weight hammer from the boom tip. It is constructed from high‑strength galvanized steel with a minimum breaking load that exceeds the weight of the hammer by a significant safety margin. The rope is designed to withstand the constant tension and abrasion of daily crane operation, but it should be inspected regularly for signs of wear, kinking, or corrosion.[reference:16]

The pin shaft (A210508000067) and mounting pin (A210501000001) secure the weight hammer assembly to the boom structure. These pins are manufactured from hardened alloy steel with a precision‑ground surface that ensures smooth rotation and alignment. The pins are zinc‑nickel coated for corrosion resistance, providing long‑term reliability in harsh environments.[reference:17]

For Sany cranes operating in extreme cold climates (below -25°C), special considerations apply to the Sany Weight Hammer. The wire rope may become stiff in cold conditions; allow the machine to idle for 10‑15 minutes before full operation to warm the rope and reduce stiffness. The weight hammer should be checked for ice buildup that could affect its free movement. The pins should be lubricated with low‑temperature grease to prevent binding. Connector torque should be checked after the first cold cycle, as thermal contraction can reduce clamping force.

The Sany Weight Hammer is also available as part of a complete hoist safety system overhaul kit, which includes the weight hammer assembly, the overwind limit switch, and all necessary wiring and connectors. Sany recommends this complete‑kit approach for vehicles with over 8,000 operating hours, as it allows the entire hoist safety system to be renewed in a single service event, eliminating the risk of hidden rope wear or pin corrosion that could compromise crane safety.

Fleet managers using this strategy report a 50% reduction in hoist‑related safety incidents and a 40% reduction in total crane maintenance costs over the equipment’s life. Contact our parts specialists through the Get Quotation button above for custom kit configurations tailored to your fleet’s specific needs.