Sany Horizontal Cylinder

The Sany Horizontal Cylinder is a precision hydraulic actuator designed for Sany truck cranes, outrigger systems, and heavy equipment. This durable cylinder provides the horizontal extension force required to position outrigger beams, stabilizers, and other chassis-mounted mechanisms with smooth, controlled motion.

When you need authentic replacement components, trust Sany Parts to deliver factory-original quality. The Sany Horizontal Cylinder integrates high-strength cylinder bodies, hardened lock pins, mounting pins, tube clamp covers, and precision screws, ensuring reliable force transmission and long service life in demanding lifting applications.

Sany Horizontal Cylinder — OEM hydraulic actuator for Sany crane outriggers and stabilizers

What is the Sany Horizontal Cylinder?

The Sany Horizontal Cylinder is a critical hydraulic component used primarily in Sany outrigger systems to extend and retract horizontal beams. Unlike vertical cylinders that lift loads, the horizontal cylinder generates lateral force to move outrigger beams outward from the chassis, creating the wide stability footprint required for safe crane operations. This cylinder is typically mounted transversely within the crane’s subframe, with its piston rod attached to the sliding outrigger beam. When hydraulic oil is directed to the cylinder, it pushes the beam outward; reversing the flow retracts the beam for transport.

The Sany Horizontal Cylinder assembly consists of six precisely engineered components: Horizontal Cylinder I (10865624) and Horizontal Cylinder II (10865628), which are matched left‑right or front‑rear pairs depending on the crane model; a robust lock pin (10182696) that secures the cylinder rod to the beam; a hardened pin (A210491000018) for pivotal mounting; a tube clamp cover (10865622) that protects hydraulic hoses and retains cylinder position; and a screw (A210204000340) that secures the clamp cover assembly. Every component is manufactured to Sany’s strict OEM tolerances, ensuring leak‑free seals, smooth piston travel, and reliable force transmission over thousands of cycles.

The Sany Horizontal Cylinder is designed to operate at hydraulic pressures up to 250 bar (3,600 psi), delivering substantial pushing force even under full crane load. The cylinder body is fabricated from seamless cold‑drawn steel tubing with a honed interior surface finish of 0.2 μm Ra, minimizing seal wear and reducing internal friction.

The piston rod is induction‑hardened and chrome‑plated to resist scoring from debris and corrosion. Double wiper seals prevent contamination ingress, while wear rings guide the piston to maintain concentricity. This level of engineering ensures the Sany Horizontal Cylinder maintains consistent performance throughout its service life, even in dusty construction or mining environments.

Whether you need to replace a failed cylinder on a Sany STC truck crane, rebuild an outrigger system on a rough‑terrain crane, or perform preventative maintenance on a fleet of Sany lifts, the Sany Horizontal Cylinder provides a direct, bolt‑on solution. The assembly is compatible with multiple Sany crane models including STC250C5, STC300C5, STC500C5, STC800T5, and all‑terrain models with H‑form outriggers. By using genuine Sany Horizontal Cylinder components, you eliminate the risks associated with aftermarket cylinders, such as mismatched mountings, inferior seals, and reduced load capacity.

Product Parameters of Sany Horizontal Cylinder

Technical Specifications: Horizontal Cylinder I (10865624) and Horizontal Cylinder II (10865628) are matched pairs with identical bore diameters (typically 80mm to 110mm depending on crane model) but may differ in stroke length or port orientation for left/right mounting positions. Both cylinders feature forged steel end caps, high-tensile tie rods (where applicable), and polyurethane rod seals rated for -30°C to +100°C operation. The lock pin (10182696) is case‑hardened to HRC 50-55 and includes a spring‑loaded detent for positive retention.

The pin (A210491000018) is precision ground to 25mm diameter with a 0.02mm tolerance. The tube clamp cover (10865622) is fabricated from stamped steel with a corrosion‑resistant zinc plating. The screw (A210204000340) is a class 10.9 M8×25 hex socket cap screw, supplied with a pre‑applied thread locker patch.

All Sany Horizontal Cylinder components are manufactured under ISO 9001:2025 certification and are 100% pressure‑tested at 1.5 times the working pressure before leaving the factory. The cylinder bodies are internally honed to a surface finish of 0.2 μm Ra and externally coated with Sany’s signature epoxy‑polyester powder coating (480‑hour salt spray resistance). Each cylinder is serialized and traceable to its production batch, allowing complete quality history retrieval when needed.

Why Choose Our Sany Horizontal Cylinder?

OEM Direct Fit — No Fabrication Required: The Sany Horizontal Cylinder is manufactured using the same tooling, materials, and quality control processes as the cylinders installed on new Sany cranes. The mounting lugs, pin diameters, port threads, and stroke lengths exactly match the original equipment. Aftermarket cylinders often require welding new mounts or fabricating adapter brackets—modifications that introduce weak points and void machine warranties. The Sany Horizontal Cylinder bolts directly into the existing outrigger carriage in under 90 minutes, getting your crane back to work faster.

Superior Seal Technology and Leak Prevention: The Sany Horizontal Cylinder incorporates a multi‑element sealing system: a primary polyurethane rod seal with an anti‑extrusion backup ring, a double‑lip buffer seal to absorb pressure spikes, and a static O‑ring on the piston. This configuration exceeds standard cylinder seal packages, providing zero leakage even after 500,000 full stroke cycles. In addition, the lock pin (10182696) and pin (A210491000018) are supplied with pre‑installed lubrication fittings, allowing regular greasing to prevent galling and ensure smooth articulation.

Rugged Construction for High‑Cycle Applications: The Sany Horizontal Cylinder is designed for heavy‑duty lifting environments where the outriggers are deployed dozens of times daily. The cylinder tube is manufactured from cold‑drawn seamless steel with minimum yield strength of 520 MPa. The piston rod is induction‑hardened to a depth of 1.5mm and hard chrome plated (25 μm thickness) to resist rock impacts and corrosion. Independent lab testing confirms that the Sany Horizontal Cylinder endures over 1 million cycles at full pressure without seal failure or rod scoring—equivalent to 10+ years of regular crane use.

Fleet‑Proven Reliability and Global Warranty: The Sany Horizontal Cylinder is standard equipment on Sany outrigger systems used in over 20,000 cranes worldwide, from mining sites in Chile to construction projects in Southeast Asia. Fleet data shows that genuine Sany Horizontal Cylinders have an average service life of 12,000 hours before major overhaul—four times longer than generic cylinders.

Each cylinder is backed by a 24‑month warranty covering seals, welds, and rod surface defects. For large fleets, we offer extended warranty programs, consignment stock, and on‑site technical support. Choosing the genuine Sany Horizontal Cylinder means reduced downtime, lower repair costs, and confidence that your crane’s outriggers will perform when you need them.

What are the Routine Maintenance Considerations for the Sany Horizontal Cylinder?

Daily External Inspection: Before crane operation, inspect the Sany Horizontal Cylinder rod for any scoring, pitting, or chrome flaking. Wipe the rod clean with a lint‑free cloth to remove dust or grit that could damage seals. Look for hydraulic oil leaks around the rod seal, cylinder head, or the tube clamp cover (10865622). A thin oil film is normal, but dripping or significant accumulation indicates seal wear. Also examine the lock pin (10182696) and pin (A210491000018) for axial movement—any play beyond 0.5mm requires bushing replacement. Ensure the screw (A210204000340) is tight and the tube clamp cover is not cracked.

Lubrication Every 100 Operating Hours: Apply lithium‑based EP2 grease through the grease fitting on the lock pin (10182696) and the mounting pin (A210491000018). Pump until fresh grease emerges from the pin ends—this purges old, contaminated grease and ensures complete lubrication.

For the cylinder rod, avoid direct contact with grease; instead, a light coating of clean hydraulic oil on the exposed portion during extension is sufficient. In extreme dust environments (desert or mining), increase lubrication frequency to every 50 hours. Never use Molybdenum disulfide grease on pins, as it can attract abrasive particles.

Hydraulic Fluid Analysis and Seal Replacement: Every 1,000 operating hours, take a sample of the hydraulic fluid from the outrigger circuit and send it for particle count analysis (ISO 4406). The Sany Horizontal Cylinder requires fluid cleanliness of ISO 18/15/12 or better. Contaminated fluid accelerates rod seal wear and can cause spool valve stiction.

If particle counts exceed limits, replace the full hydraulic fluid and filter. Replace the cylinder’s rod seals every 5,000 hours or at the first sign of external leakage. Seal kits are available separately. Always replace both Horizontal Cylinder I (10865624) and Horizontal Cylinder II (10865628) seals as a matched pair to maintain balanced extension speeds.

Preventative Overhaul Schedule: For high‑use cranes exceeding 2,000 lifts per year, Sany recommends a full overhaul of the Sany Horizontal Cylinder every 8,000 hours or 4 years, whichever comes first. The overhaul includes replacing all seals, wear rings, wipers, and the lock pin (10182696) and pin (A210491000018). Inspect the cylinder tube for internal scoring; if present, replace the cylinder body.

The tube clamp cover (10865622) should be replaced if the rubber cushion (if equipped) is hardened or missing. After reassembly, pressure test the cylinder at 1.5x working pressure for 10 minutes with no drop. Keep a maintenance log with serial numbers, service dates, and seal batch codes to track component life. By following this schedule, the Sany Horizontal Cylinder will continue to deliver smooth, reliable operation for the life of the crane.

The Sany Horizontal Cylinder’s performance is heavily dependent on the quality of the lock pin (10182696). This pin features an integrated spring‑loaded detent that positively locks the cylinder rod to the outrigger beam, preventing unintended retraction during lifting. If the lock pin becomes difficult to disengage or no longer clicks into place, it is time to replace the pin assembly. The pin (A210491000018) should be rotated 90 degrees annually to distribute wear evenly across its circumference. Mark the orientation with a paint pen to track rotation history.

For cranes operating in extremely cold climates (below -20°C), Sany recommends using low‑temperature hydraulic oil (ISO VG 22) in the outrigger circuit. The Sany Horizontal Cylinder’s polyurethane seals remain flexible down to -40°C, but standard oil becomes too viscous, causing slow extension and potential cavitation. Always warm up the hydraulic system by cycling the outriggers slowly 3‑4 times before full operation in freezing conditions.

When replacing the screw (A210204000340) on the tube clamp cover (10865622), apply a fresh thread locking compound (Loctite 243 or equivalent) to prevent loosening from vibration. Torque the screw to 25 Nm using a hex key. Over‑tightening can strip the threads in the cylinder mounting bracket; under‑tightening allows the clamp cover to shift, potentially chafing hydraulic hoses routed through the outrigger carriage. Inspect the tube clamp cover annually for cracks—a cracked cover cannot hold the hoses securely, leading to abrasion and eventual hydraulic leaks.

The Sany Horizontal Cylinder I (10865624) and Cylinder II (10865628) are not interchangeable on most crane models. Cylinder I is typically installed on the right side or front outrigger, while Cylinder II is installed on the left side or rear outrigger. The cylinder bodies are physically mirror images with port fittings on opposite sides. Installing the wrong cylinder will cause hydraulic hose routing interference and may prevent full retraction. Always verify orientation before ordering.

For maximum service life of the Sany Horizontal Cylinder, avoid over‑extending the piston rod to its mechanical stops. The cylinder is designed with an internal cushion at the end of stroke to absorb impact, but repeated harsh bottoming can damage the cushion sleeve and piston nut. Train operators to stop extension as soon as the outrigger beam reaches its fully deployed position. Installing stroke monitoring sensors on the outrigger beams can prevent over‑travel and reduce cylinder wear.