Sany Suspension Assy-Rear

The Sany Suspension Assy-Rear is a comprehensive heavy-duty load-bearing system for Sany mining dump trucks and off‑highway vehicles. This complete Sany rear suspension system manages all vertical, lateral, and longitudinal forces between the rear axles and the chassis. It provides exceptional stability, load equalization, and shock absorption in demanding mining conditions. When you need authentic replacement components, trust Sany Parts to deliver factory-original quality and precise fitment. The Sany Suspension Assy-Rear incorporates 38 precision components, including the Sany walking beam suspension assembly, center support, rear steel plate spring, thrust rod, central shaft, hollow shaft, and all associated fasteners.

Sany Suspension Assy-Rear — OEM rear suspension assembly for Sany mining dump trucks and heavy construction equipment

What is the Sany Suspension Assy-Rear?

The Sany Suspension Assy-Rear is a complete rear-axle suspension system that supports the middle and rear axles of Sany multi‑axle heavy trucks, mining dump trucks, and construction vehicles. This Sany rear suspension assembly transmits all forces between the vehicle’s chassis and the rear wheels, including vertical loads from payload, lateral forces during cornering, and longitudinal forces during acceleration and braking.

The Sany Suspension Assy-Rear is engineered to distribute weight evenly across the rear axles, maintaining tire contact and traction even on severely uneven terrain. This load‑equalizing function reduces peak axle stresses by up to 35% compared to rigid suspension designs, protecting axle housings, wheel bearings, and tire tread from premature wear. The Sany walking beam suspension is the heart of this design, allowing independent articulation of tandem axles.

This assembly comprises 38 precision‑engineered components that function as an integrated system. The suspension walking beam assembly (10136396) serves as the central pivot structure, allowing the rear axles to articulate independently while maintaining proper alignment. The center support assembly (11448811) provides the mounting interface between the walking beam and the chassis frame. This configuration makes the Sany tandem suspension highly durable.

The rear steel plate spring assembly (A229900003121) is a multi‑leaf progressive spring pack that provides primary load‑bearing and shock‑absorbing functions. The rear spring pressure plate (11474701) secures the spring to the axle. The thrust rod assembly (A810314990006) and thrust rod bracket (10136119) control axle wind‑up and maintain proper pinion angle, preventing driveline vibration and premature u‑joint wear. For severe mining conditions, the Sany mining truck suspension is built to last.

Central to the Sany Suspension Assy-Rear is the central shaft (A820301021100), Sany Suspension Assy-Rear supported by the hollow shaft (A820201020000) and the end cover (A810314990009). These components form the pivot point around which the walking beam rotates during articulation, allowing the middle and rear axles to maintain ground contact even when traversing deep ruts or climbing over rocks. This walking beam design is the hallmark of the Sany Suspension Assy-Rear.

Additional components include the suspension walking beam pin (A820301021095), tie bolt (A820301021097), spring lock pin (A820301015960), and multiple washers and pins. The Klemmkeil (A820201010000) provides precise clamping force adjustment, and the sliding board (A820403000753) reduces friction. The shock absorber (10125894) with pressure plate (10490661) damps spring oscillations and prevents bottom‑out. Every Sany Suspension Assy-Rear kit includes these matched parts.

The steel wire (11050378) provides a secondary retention safety mechanism. The adjusting pillow (A820299001611), rear suspension rocker (A820301021118), and oil cup (A210804000002) complete the assembly, ensuring lubrication to pivot points for smooth operation. Whether rebuilding a Sany SKT90S, SKT105S, or SKT130S mining truck, this Sany mining truck suspension delivers factory performance.

Product Parameters of Sany Suspension Assy-Rear

Technical specifications: The Sany Suspension Assy-Rear is rated for rear axle loads up to 40 tons per axle. The walking beam and center support are high‑strength cast steel. The rear steel plate spring is a progressive multi‑leaf pack (10‑14 leaves) of SUP11A spring steel (1300‑1500 MPa tensile). The thrust rod features bonded rubber bushings. The central shaft is forged alloy steel, case‑hardened. All components are ISO 9001:2025 certified and 100% traceable. The Sany walking beam suspension is engineered for extreme durability.

The spring is 100% magnetic particle inspected. Walking beam pins are induction‑hardened (HRC 50‑55) and zinc‑flaked. The spring lock pin provides audible locking. The shock absorber is a twin‑tube hydraulic unit (55 mm piston). The Sany mining truck suspension has been field‑validated for over 12,000 operating hours in Australian, Chilean, and Canadian mining operations.

Why Choose Our Sany Suspension Assy-Rear?

Complete 38‑Piece OEM Kit — Perfectly Matched Components: The Sany Suspension Assy-Rear includes every component from the walking beam to the last washer. This eliminates compatibility problems from mixing aftermarket parts. The walking beam and center support are machined as a matched set. The spring lock pin is pre‑calibrated for Sany’s U‑bolt assembly. The Klemmkeil matches Sany’s precise wedge angle, delivering correct clamping force without over‑stressing the spring. This is the only way to maintain genuine Sany Suspension Assy-Rear performance.

Superior Spring Steel and Walking Beam Construction: The rear steel plate spring (A229900003121) uses SUP11A silicon‑manganese spring steel, heat‑treated to tempered martensite. Leaf tips are tapered and shot‑peened. The suspension walking beam (10136396) is high‑strength ductile iron with internal ribbing. Independent tests show walking beam castings endure over 2 million cycles, and leaf springs survive 500,000 full compressions—three times the life of generic springs. The Sany walking beam suspension is built for the toughest mining conditions.

Precision Thrust Rod and Load Equalization: The thrust rod assembly (A810314990006) and bracket (10136119) control axle wind‑up and maintain driveline angles. Bonded rubber bushings absorb driveline shocks. The walking beam design automatically equalizes load between middle and rear axles, reducing peak axle stresses by up to 35% compared to rigid suspensions. This protects axle housings, bearings, and tires, giving longer component life and a smoother ride. The Sany tandem suspension excels at load sharing.

Fleet‑Proven Reliability and Comprehensive Warranty: Standard on over 3,000 Sany SKT trucks in 60+ countries. Fleet data shows 12,000‑hour average service life—three times longer than generic components—and over 70% fewer spring breakages. The thrust rod and walking beam pins have zinc‑flake coating and hardened bearing surfaces. Backed by a 24‑month warranty on casting defects, spring breakage, and bushing delamination. Volume pricing, consignment stock, and global technical support are available. This is the Sany mining truck suspension that keeps your fleet moving.

What are the Routine Maintenance Considerations for the Sany Suspension Assy-Rear?

Daily visual inspection before operation: Inspect the rear steel plate spring (A229900003121) for cracked leaves or broken center bolts. Check the walking beam (10136396) for cracks around pin bosses. Examine the thrust rod (A810314990006) and bracket (10136119) for damaged rubber bushings. Look for hydraulic leaks on shock absorber (10125894). Ensure the lock pin (A820301015960) is fully engaged with its detent visible. Regular inspections keep your Sany rear suspension safe.

Lubrication every 250 operating hours: Grease the central shaft (A820301021100) through the oil cup (A210804000002) using lithium EP2 grease. Pump until fresh grease emerges from hollow shaft seals. Also lubricate walking beam pins (A210491000018, A210491000020). In extreme dust environments (mining), increase frequency to every 100 hours. The sliding board (A820403000753) is self‑lubricating and requires no grease. Proper lubrication extends the life of the Sany walking beam suspension.

U‑bolt torque inspection (every 1,000 hours): Retorque U‑bolt nuts (A210308000027, A210319000024, A210355000009, A210307000012) to 350‑400 Nm in a cross pattern. New U‑bolts must be retorqued after 50 hours. After torquing, verify the spring lock pin (A820301015960) is fully engaged. Mark nuts with paint pen for quick visual checks. Loose U‑bolts are a leading cause of spring breakage and axle misalignment. Maintaining correct torque is vital for any Sany tandem suspension.

Preventative overhaul every 8,000 hours or 4 years: Replace all rubber components (thrust rod bushings, walking beam pivot bushings, central shaft bushings). Replace walking beam and center support if pin bore wear exceeds 0.5 mm. Replace leaf spring if sag exceeds 15 mm. Replace shock absorber (10125894), Klemmkeil (A820201010000), adjusting pillow (A820299001611), and all washers and nuts. Keep a detailed maintenance log of torques and replacements to extend service life beyond 16,000 hours. A proactive plan keeps your Sany mining truck suspension in top condition.

The suspension walking beam (10136396) is the central structural element. Its pin bores are line‑bored after casting for perfect concentricity. A cracked walking beam is indicated by uneven tire wear (scalloping) or a clunking noise over potholes. Field welding is prohibited—replace the beam. The Sany walking beam suspension depends on the integrity of this component.

The thrust rod (A810314990006) controls axle wind‑up. Worn bushings cause clunking during throttle or brake application and uneven tire wear. Replace the entire rod assembly when bushings wear—the rod ends are permanently bonded. The steel wire (11050378) provides secondary retention. This design is unique to the Sany rear suspension.

The Klemmkeil (A820201010000) is a precision wedge that centers the axle on the spring. If worn, the axle may misalign, causing steering pull and rapid tire wear. The adjusting pillow (A820299001611) provides fine geometry adjustment; check its torque during every U‑bolt inspection. These details make the Sany mining truck suspension outstanding.

For arctic conditions (below -25°C), use low‑temperature bushings, synthetic shock absorber fluid, and low‑temperature grease in the central shaft and oil cup. The steel wire and lock pin remain reliable. Operators should avoid harsh impacts to prevent brittle spring failure. The Sany tandem suspension performs well even in extreme cold with proper care.

Sany recommends replacing the entire rear suspension as a complete kit after 8,000 hours. This system replacement prevents the “weak link” failure that often follows partial repairs. Fleet owners using this strategy report 50% fewer suspension‑related service calls and 35% lower total maintenance costs. Your Sany rear suspension investment pays off.

The Sany Suspension Assy-Rear includes fail‑safe features: the steel wire retains a failed thrust rod, and the spring lock pin holds loosened U‑bolt nuts. These safety features are preserved only with genuine Sany components, contributing to Sany’s outstanding mining safety record. Choose the authentic Sany walking beam suspension for peace of mind.