Sany Piping-Outrigger-Rear

The Sany Piping-Outrigger-Rear is a comprehensive OEM hydraulic conduit network engineered to power the rear stabilization systems on Sany heavy mining trucks and construction cranes. This Sany Piping-Outrigger-Rear assembly integrates multiple rubber hoses, steel pipes, a critical dual-directional hydraulic lock, pipe connectors, an oil catcher, and mounting hardware to deliver reliable fluid flow to rear outrigger cylinders. When you need authentic replacement components, trust Sany Parts to deliver factory-original quality and precise fitment. The Sany Piping-Outrigger-Rear is specifically designed for Sany SKT90S, SKT105S, and SKT130S mining trucks, as well as Sany STC-series truck cranes, ensuring stable, responsive rear outrigger operation under the most demanding load conditions.

Sany Piping-Outrigger-Rear — OEM hydraulic conduit assembly for rear outrigger systems on Sany heavy mining trucks and construction cranes

What is the Sany Piping-Outrigger-Rear?

The Sany Piping-Outrigger-Rear is a specialized hydraulic conduit assembly that delivers pressurized fluid from the chassis hydraulic system to the rear outrigger cylinders on Sany heavy mining trucks and construction cranes. This comprehensive network enables controlled extension and retraction of the rear stabilizer beams, providing the stable platform required for safe lifting and dumping operations.

This assembly comprises 22 precision-engineered components that work as an integrated fluid distribution system. Multiple rubber hoses provide flexible connections that absorb chassis vibration, while steel pipes create rigid pathways that maintain alignment. A dual-directional hydraulic lock prevents unintended cylinder retraction under load, and an oil catcher collects any minor weepage before it can reach the ground. The Sany Piping-Outrigger-Rear is the lifeline for rear stabilization.

The dual-directional hydraulic lock (B222200000021) is the most critical safety component in this assembly. This pilot-operated check valve mechanically blocks return flow until pilot pressure is applied, preventing the outriggers from retracting under load even if a hydraulic line fails. This fail‑safe design protects personnel and equipment during lifting operations. The Sany Piping-Outrigger-Rear includes this lock as a factory‑calibrated component.

The Sany Piping-Outrigger-Rear is a direct replacement for worn or damaged hydraulic conduits on Sany SKT90S (60‑ton capacity), SKT105S (72‑ton capacity), and SKT130S mining dump trucks, as well as Sany STC‑series truck cranes and SYM dump trucks. By using this genuine assembly, you ensure that all pipe bends match factory routing specifications, eliminating misrouted lines that could cause chafing, overheating, or restricted flow.

Product Parameters of Sany Piping-Outrigger-Rear

Technical specifications: The Sany Piping-Outrigger-Rear is designed for maximum system pressures of 28 to 35 MPa (4,060 to 5,075 psi), compatible with Sany SKT series mining truck hydraulic systems. The dual-directional hydraulic lock (B222200000021) is a pilot‑operated check valve with a cracking pressure of 0.5 MPa and a maximum holding pressure of 40 MPa, providing fail‑safe cylinder locking.

All rubber hoses are high‑impulse rated (4SP/4SH) with continuous working pressure of 35 MPa and burst pressure exceeding 140 MPa. Steel pipes are cold‑drawn seamless tubing, zinc‑nickel coated for 500+ hours of salt spray resistance. The oil catcher (A810201062325) is manufactured from oil‑resistant NBR composite with a fluid capture capacity of approximately 50 milliliters. All components are manufactured under ISO 9001:2025 certification and are 100% traceable to Sany’s original production batches. The Sany Piping-Outrigger-Rear has been validated for over 8,000 field hours.

Why Choose Our Sany Piping-Outrigger-Rear?

Complete 22‑Piece OEM Kit — Perfectly Matched Components: The Sany Piping-Outrigger-Rear includes every hose, steel pipe, connector, and valve component as a matched set. This eliminates compatibility problems that arise from mixing aftermarket parts. All steel pipes are pre‑formed to match the exact chassis routing of Sany SKT series trucks, ensuring correct clearance from moving components without the need for field bending that could cause kinking.

Fail‑Safe Hydraulic Lock for Maximum Safety: The Sany Piping-Outrigger-Rear includes a genuine dual‑directional hydraulic lock (B222200000021) that prevents the outriggers from drifting downward during lifting operations. This lock is factory‑calibrated and cannot be sourced separately as a matched assembly from aftermarket suppliers. It maintains holding pressure even if a supply line is ruptured, providing a fail‑safe condition that protects personnel and equipment.

Integrated Oil Catcher for Environmental Compliance: The Sany Piping-Outrigger-Rear features a dedicated oil catcher (A810201062325) that collects any hydraulic oil weeping from pipe connectors before it can reach the ground. This helps mining operations comply with environmental regulations while providing early visual indication of developing seal wear. The catcher is made of translucent NBR material, allowing easy inspection of collected fluid without removal.

Fleet‑Proven Reliability and Comprehensive Warranty: The Sany Piping-Outrigger-Rear is standard equipment on Sany SKT series mining trucks in over 60 countries. Fleet data from 2,000+ Sany SKT trucks shows that genuine Sany rear outrigger piping delivers an average service life exceeding 8,000 hours—three times longer than generic assemblies—while reducing rear outrigger hydraulic failure incidents by over 60%. The assembly is backed by a 24‑month manufacturer’s warranty covering lock failure, hose rupture, pipe cracking, and connector leakage.

What are the Routine Maintenance Considerations for the Sany Piping-Outrigger-Rear?

Daily visual inspection before operation: Inspect all rubber hoses for cuts, bulging, or abrasion. Look for dripping oil around the dual‑directional hydraulic lock (B222200000021) and all pipe connectors. Check the oil catcher (A810201062325)—if fluid is present, note the quantity and location. A bulging hose indicates internal braid failure and requires immediate replacement. Any visible leak requires immediate repair.

Hydraulic fluid quality and filtration — every 500‑1,000 hours: Maintain hydraulic fluid cleanliness of ISO 4406:2017 code 18/16/13 or better. Contaminated fluid is the leading cause of spool sticking and seal wear. Take samples every 1,000 hours for particle count analysis. In dusty mining environments, increase the fluid change interval to every 500 hours and replace all return line filters. Never mix different hydraulic fluid types, as incompatible additives can damage seals.

Connector torque check and hose replacement — every 1,000 hours: Using a calibrated torque wrench, verify the torque of all pipe connectors to 28‑32 Nm for 12 mm fittings and 35‑40 Nm for 18 mm fittings. Mark each fitting after torquing. If any connector is loose, replace the ferrule before reassembly—never reuse a compressed ferrule. Inspect all rubber hoses for heat cracks or ozone deterioration; replace any hose with visible cracking or hardening of the cover layer.

Preventative replacement schedule — every 4,000 hours or 2 years: For high‑use mining trucks, Sany recommends a full replacement of the Sany Piping-Outrigger-Rear every 4,000 hours or 2 years. Replace all rubber hoses as a set—rubber deteriorates with age even without visible cracks. Replace all sealing ferrules and O‑rings (A210609000312). Replace the dual‑directional hydraulic lock if any internal leakage is detected. Drain and clean the oil catcher. By following this proactive schedule, the Sany Piping-Outrigger-Rear can reliably exceed 8,000 hours of service.

The dual-directional hydraulic lock (B222200000021) is the most critical safety component in the Sany Piping-Outrigger-Rear. This pilot-operated check valve prevents the rear outrigger cylinders from retracting under load by mechanically blocking return flow until pilot pressure is applied. If the lock fails, outriggers may drift downward, creating a tipping hazard. Symptoms include outrigger pad lift‑off during crane operation or constant need to re‑level the machine after set‑up. Any suspected lock failure requires immediate replacement of the entire lock assembly—field repair is not possible.

The oil catcher assembly (A810201062325) is a unique Sany environmental protection feature that captures any hydraulic oil weeping from the pipe connectors before it can reach the ground. This device also serves as an early warning system: if the oil catcher is full, inspect all pipe connectors on that side for developing leaks. The catcher is made of translucent NBR material, allowing the operator to see the fluid level without removing the assembly. Always clean and reinstall the catcher after inspection.

For Sany mining trucks operating in extreme cold climates (below -25°C), special considerations apply to the Sany Piping-Outrigger-Rear. The standard hydraulic fluid becomes more viscous, causing slow cylinder response. Sany recommends using low‑viscosity synthetic hydraulic fluid (ISO VG 22) for arctic applications. Rubber hoses remain flexible down to -40°C but should be inspected more frequently for cracking. The hydraulic lock may be slower to release in cold conditions; warm up the system by cycling outriggers slowly 3‑4 times before full operation. Steel pipes become more brittle—avoid harsh impacts.

The Sany Piping-Outrigger-Rear is also available as part of a complete rear outrigger hydraulic system rebuild kit, which includes the piping assembly, the dual‑directional hydraulic lock, the oil catcher, and all sealing washers and O‑rings. Sany recommends this complete‑kit approach for vehicles with over 8,000 operating hours, as it allows the entire rear outrigger hydraulic circuit to be renewed in a single maintenance event, minimizing downtime. Fleet managers using this strategy report a 50% reduction in outrigger‑related breakdowns. Contact our parts specialists through the Get Quotation button for custom kits.