Sany Assembling assy-motor-winch

The Sany Assembling Assy-Motor-Winch is a complete OEM hydraulic winch drive unit that delivers controlled, high‑torque rotational power for hoisting and lowering operations on Sany heavy truck cranes, all‑terrain cranes, and large construction equipment.

This Sany Assembling Assy-Motor-Winch integrates a high‑performance plunger motor, a balance valve, a transfer block, split flanges, O‑rings, and a full set of high‑strength bolts into a single, factory‑matched assembly. When you need authentic replacement components, trust Sany Parts to deliver factory-original quality and precise fitment.

The Sany Assembling Assy-Motor-Winch is specifically designed for Sany STC‑series and SAC‑series cranes, providing reliable, smooth winch control with integrated load‑holding and safety features, ensuring maximum lifting productivity and operational safety in the most demanding job sites.

Sany Assembling Assy-Motor-Winch — OEM hydraulic winch motor and control assembly for Sany heavy truck cranes and all‑terrain cranes

What is the Sany Assembling Assy-Motor-Winch?

The Sany Assembling Assy-Motor-Winch is a complete OEM hydraulic drive unit that powers the winch drum for hoisting and lowering operations on Sany heavy lifting equipment. This assembly converts hydraulic flow from the main pump into controlled rotational torque, enabling precise load handling with smooth acceleration and deceleration.

The Sany Assembling Assy-Motor-Winch comprises seven precision‑engineered components that function as an integrated drive and control unit. The plunger motor (A220501000108) delivers high‑torque output. The winch balance valve (11008069) controls load‑lowering speed and prevents free‑fall. The transfer block (11008070) routes oil between the motor and balance valve, while split flanges, O‑rings, and bolts provide leak‑tight connections.

The Sany Assembling Assy-Motor-Winch is critical for crane safety and lifting efficiency. It must provide smooth, proportional winch control under varying load conditions, from light hook movements to heavy load hoisting. The integrated balance valve ensures that loads descend at a controlled speed, preventing overspeed and protecting the motor from cavitation.

This assembly is a direct replacement for worn or damaged winch motor units on Sany STC‑series and SAC‑series cranes. By using this genuine assembly, you ensure that the motor displacement, valve cracking pressure, and mounting bolt patterns match factory specifications, eliminating performance degradation and safety risks associated with mismatched components.

Product Parameters of Sany Assembling Assy-Motor-Winch

Technical specifications: The Sany Assembling Assy-Motor-Winch is designed for a maximum operating pressure of 35 MPa (5,075 psi) and a flow rate up to 250 L/min, providing a rated output torque of 15,000‑25,000 N·m depending on the crane model. The plunger motor features a variable‑displacement design for optimal torque and speed control.

The balance valve (11008069) is a pilot‑operated counterbalance valve with a cracking pressure of 2.5 MPa and a pilot ratio of 4:1, ensuring smooth load lowering and preventing free‑fall. The transfer block (11008070) is manufactured from high‑strength ductile iron with precision‑machined oil passages. All fasteners are property class 10.9 with corrosion‑resistant coating.

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 winching conditions when properly maintained.

Why Choose Our Sany Assembling Assy-Motor-Winch?

Complete 7‑Component OEM Kit — No Missing Parts: The Sany Assembling Assy-Motor-Winch includes the motor, balance valve, transfer block, connector, O‑ring, split flange, and all bolts as a single, factory‑matched assembly. This eliminates compatibility problems that arise from sourcing individual components from different suppliers, ensuring that all mounting points, port sizes, and sealing surfaces match factory specifications.

Integrated Balance Valve for Safe Load Lowering: The Sany Assembling Assy-Motor-Winch incorporates a winch balance valve (11008069) that controls descent speed and prevents load free‑fall. This valve ensures smooth, metered lowering even with heavy loads, protecting the motor from overspeed and cavitation while enhancing operator confidence and load stability.

High‑Torque Plunger Motor for Demanding Lifting Tasks: The Sany Assembling Assy-Motor-Winch uses a high‑performance variable‑displacement plunger motor that delivers maximum torque at low speed, ideal for precise load positioning. The motor’s robust design withstands continuous heavy‑duty winching cycles, ensuring reliable operation in the most demanding construction and mining applications.

Fleet‑Proven Reliability and Comprehensive Warranty: The Sany Assembling Assy-Motor-Winch is standard equipment on Sany STC‑series and SAC‑series cranes in over 80 countries. Fleet data shows that genuine Sany winch motor assemblies deliver an average service life exceeding 8,000 hours—three times longer than generic aftermarket assemblies—while eliminating motor seizure, valve sticking, and seal leakage failures. The assembly is backed by a 24‑month manufacturer’s warranty covering motor internal wear, valve failure, and bolt fracture. Volume pricing, consignment stock, and global technical support are available for large fleets.

What are the Routine Maintenance Considerations for the Sany Assembling Assy-Motor-Winch?

Daily visual inspection before operation: Before each shift, inspect the Sany Assembling Assy-Motor-Winch for visible oil leaks around the motor, balance valve, transfer block, and flange connections. Check that all mounting bolts (A210111000198) are tight and that the split flange (B229900000333) is correctly seated. Look for any signs of chafing or abrasion on hydraulic hoses connected to the assembly. Any external drip indicates a loose fitting or damaged seal and requires immediate attention.

Hydraulic fluid cleanliness and filtration — every 500‑1,000 hours: The Sany Assembling Assy-Motor-Winch requires hydraulic fluid cleanliness of ISO 4406:2017 code 18/16/13 or better. Contaminated fluid is the leading cause of motor internal wear, valve spool sticking, and seal damage. Take fluid samples every 1,000 hours for particle count analysis. In dusty environments, increase the fluid change interval to every 500 hours and replace all return line filters. Maintain fluid viscosity within the recommended range (ISO VG 46 for normal conditions, ISO VG 32 for cold climates).

Winch performance test and bolt torque check — every 1,000 operating hours: Test the Sany Assembling Assy-Motor-Winch by hoisting a rated load and observing smoothness and speed consistency. If the winch jerks or fails to hold load, the balance valve (11008069) may require adjustment or replacement. Using a calibrated torque wrench, verify the torque of all bolts to the manufacturer specification (typically 80‑100 Nm for M16 bolts). Mark each bolt after torquing for quick visual verification.

Preventative replacement schedule — every 4,000 hours or 2 years: For high‑use cranes, Sany recommends a full replacement of the Sany Assembling Assy-Motor-Winch every 4,000 operating hours or 2 years. Replace the motor, balance valve, transfer block, O‑ring, split flange, and all bolts as a set. Even if no visible wear is apparent, internal seal degradation, valve spring fatigue, and bolt stretch can occur without warning. Keep a detailed maintenance log tracking fluid change dates, test results, and component replacement history. By following this proactive schedule, the Sany Assembling Assy-Motor-Winch can reliably exceed 8,000 operating hours.

The plunger motor (A220501000108) is the core power unit of the Sany Assembling Assy-Motor-Winch. This variable‑displacement axial piston motor converts hydraulic flow into rotary mechanical power, delivering high torque at low speeds for precise load control. The motor features a pressure‑balanced design that minimizes internal leakage and maintains high efficiency across a wide operating range. If the motor shows signs of excessive noise, overheating, or reduced speed, internal wear may be present.

The balance valve (11008069) is a pilot‑operated counterbalance valve that controls the winch lowering speed and prevents free‑fall. This valve creates a backpressure on the motor return port, ensuring that the load descends at a controlled rate. The valve is factory‑set to the correct cracking pressure and pilot ratio. If the valve fails to hold load or causes jerky lowering, it must be replaced or recalibrated by an authorized technician.

The transfer block (11008070) is a manifold that routes hydraulic oil between the motor and the balance valve. It is manufactured from ductile iron with precision‑machined ports and sealing surfaces. The block also provides mounting points for the split flange (B229900000333) and pipe connector (A229900002902). The O‑ring (A210609000117) ensures a leak‑free seal between the block and the motor.

For Sany cranes operating in extreme cold climates (below -25°C), special considerations apply to the Sany Assembling Assy-Motor-Winch. Use low‑viscosity hydraulic fluid (ISO VG 22) to ensure proper motor lubrication and valve response during cold starts. The balance valve may have slower response until the fluid warms; allow the machine to idle for 10‑15 minutes before full winch operation. Inspect the O‑ring and flange seals for hardening; replace if leakage is observed. Bolts should be retorqued after the first cold cycle, as thermal contraction can reduce clamping force.

The Sany Assembling Assy-Motor-Winch is also available as part of a complete hoist system overhaul kit, which includes the motor assembly, the winch drum, the hoist brake, and all control valves. Sany recommends this complete‑kit approach for vehicles with over 8,000 operating hours, as it allows the entire hoisting system to be renewed in a single service event, eliminating the risk of hidden motor wear or valve fatigue that could compromise lifting safety.

Fleet managers using this strategy report a 50% reduction in hoist system‑related breakdowns 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.