Sany Oil Pump Assy

The Sany Oil Pump Assy is a complete OEM hydraulic fluid power unit that supplies high‑pressure oil to the lifting, steering, braking, and suspension circuits on Sany heavy mining trucks and construction machinery.

This Sany Oil Pump Assy integrates a high‑pressure plunger pump, a gear pump, split flanges, pipe connectors, O‑rings, and hardened fasteners into a single, ready‑to‑install assembly. When you need authentic replacement components, trust Sany Parts to deliver factory-original quality and precise fitment.

The Sany Oil Pump Assy is specifically designed for Sany SKT90S, SKT105S, and SKT130S mining dump trucks, as well as Sany STC-series cranes, ensuring reliable fluid power delivery under the most demanding load conditions.

Sany Oil Pump Assy — OEM hydraulic fluid power unit for Sany heavy mining trucks and construction equipment

What is the Sany Oil Pump Assy?

The Sany Oil Pump Assy is a complete, factory-assembled hydraulic power unit that supplies pressurized oil to the lifting, steering, braking, and suspension circuits on Sany heavy mining trucks and construction machinery.

This assembly is the heart of the chassis hydraulic system, converting mechanical rotational energy from the engine or transmission into hydraulic flow at system pressures up to 28 MPa (4,060 psi) for the main lifting circuit.

The Sany Oil Pump Assy comprises 15 precision-engineered components that work as an integrated fluid power unit. A high‑displacement plunger pump (B220301000588) provides the high‑pressure oil required for dump body lifting operations.

A gear pump (A220301000288) supplies lower‑pressure oil to steering, pilot control, and lubrication circuits. Multiple split flanges (A229900002488, B229900000332, A229900005120), pipe connectors, O‑rings, and hardened fasteners complete the assembly, ensuring leak‑tight integration with the vehicle’s hydraulic network.

The Sany Oil Pump Assy is designed to deliver the exact flow and pressure required by Sany’s chassis hydraulic systems. For the SKT90S mining dump truck, the lifting hydraulic pump typically delivers 240 L/min at 2,000 rpm at a system pressure of 130 bar (1,885 psi) for the lifting circuit.

The high‑pressure plunger pump is designed to improve lifting efficiency by up to 30%, enabling a full dump body raise cycle in under 20 seconds—a critical advantage in high‑productivity mining operations.

The Sany Oil Pump Assy is a direct replacement for worn or damaged pump assemblies 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-series dump trucks.

By using this genuine assembly, you ensure that the pump displacement, pressure ratings, and mounting flange configurations match factory specifications, eliminating compatibility issues that arise from mismatched aftermarket components.

Product Parameters of Sany Oil Pump Assy

Technical specifications: The Sany Oil Pump Assy is designed for maximum system pressures of 28 MPa (4,060 psi) for the main lifting circuit, with a hydraulic flow capacity of up to 240 L/min at 2,000 rpm.

The plunger pump (B220301000588) is a high‑displacement axial piston pump with variable displacement capability, providing flow on demand to reduce energy consumption when lifting functions are not active.

The gear pump (A220301000288) is a fixed‑displacement unit supplying 30‑40 L/min for steering and pilot control circuits, typically operating at 16‑20 MPa.

All fasteners (washers A210401000001, A210401000002; screws A210204000181, A210204000024; bolt A210111000039) are property class 10.9 or better, zinc‑nickel coated for 500+ hours of salt spray resistance.

O‑rings are NBR compound (B230101000647) rated for -40°C to +120°C operation. Split flanges feature precision‑machined sealing grooves and are supplied with pre‑installed O‑rings for immediate installation.

The Sany Oil Pump Assy is manufactured under ISO 9001:2025 certification and is 100% traceable to Sany’s original production batches.

The assembly has been validated on Sany SKT series mining trucks operating in Australian iron ore mines, Chilean copper mines, and Canadian oil sands, demonstrating a field service life exceeding 8,000 operating hours under heavy‑duty conditions.

Why Choose Our Sany Oil Pump Assy?

Complete 15‑Piece OEM Kit — Perfectly Matched Components: The Sany Oil Pump Assy includes every component—plunger pump, gear pump, all split flanges, pipe connectors, O‑rings, and fasteners—as a single, factory‑matched assembly.

This eliminates compatibility problems that arise from sourcing individual pump sections, flanges, and seals from different suppliers. The internal clearances between the plunger pump and its mounting plate are pre‑set at the factory, ensuring correct alignment and preventing premature seal wear or shaft breakage.

High‑Pressure Plunger Pump for Fast Lifting Cycles: The Sany Oil Pump Assy features a high‑displacement axial piston pump (B220301000588) that delivers the flow and pressure required for rapid dump body raising and lowering.

On Sany SKT90S and SKT105S mining trucks, this pump enables a single lifting cycle in under 20 seconds, improving cycle times by up to 30% compared to standard pumps.

The variable displacement design reduces engine load when the lifting circuit is not active, contributing to lower fuel consumption and extended component life.

Leak‑Free Connections with Precision Flanges: The Sany Oil Pump Assy uses split flanges (A229900002488, B229900000332, A229900005120) and a right‑angle flange connector (A210770000615) that create leak‑tight, vibration‑resistant connections between the pump sections and the hydraulic hoses.

These flanges eliminate the need for threaded adapters that can loosen under severe chassis vibration. Each flange is supplied with the correct O‑ring (B230101000647) and is machined to exact tolerances, ensuring proper compression of the sealing element without over‑compression that could cause seal failure.

Fleet‑Proven Reliability and Comprehensive Warranty: The Sany Oil Pump Assy is standard equipment on Sany SKT series mining trucks and Sany cranes in over 60 countries.

Fleet data from 2,000+ Sany SKT trucks shows that genuine Sany oil pump assemblies deliver an average service life exceeding 8,000 hours—three times longer than generic aftermarket pumps—while reducing hydraulic system failures by over 50%.

The assembly is backed by a 24‑month manufacturer’s warranty covering pump cavitation, seal leakage, flange thread damage, and bearing failure. Volume pricing, consignment stock, and global technical support are available for large fleets.

What are the Routine Maintenance Considerations for the Sany Oil Pump Assy?

Daily visual inspection before operation: Before each operating shift, inspect the Sany Oil Pump Assy for visible oil leaks around the plunger pump (B220301000588) and gear pump (A220301000288).

Look for fluid seepage at the split flange interfaces and pipe connectors. Check that all mounting bolts (A210111000039) and screws (A210204000181, A210204000024) remain tight.

Any external leak indicates a failed seal, loose fastener, or cracked flange and requires immediate investigation. Also listen for unusual pump noise—whining or knocking sounds may indicate cavitation or internal wear.

Hydraulic fluid quality and filtration — every 500‑1,000 hours: The Sany Oil Pump Assy requires hydraulic fluid cleanliness of ISO 4406:2017 code 18/16/13 or better. Contaminated fluid is the leading cause of plunger pump failure and gear pump wear.

Take fluid 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.

Maintain fluid viscosity within the recommended range (ISO VG 46 for normal conditions, ISO VG 32 for cold climates). Never mix different hydraulic fluid types.

Pump performance testing — every 2,000 operating hours: Test the flow and pressure output of the Sany Oil Pump Assy using a calibrated flow meter and pressure gauge.

For the plunger pump (B220301000588), measure flow at rated engine speed. If flow has dropped by more than 15% from specification, internal wear is indicated and overhaul is required.

For the gear pump (A220301000288), if case drain flow exceeds 10% of pump output, internal clearance wear is excessive. Record all test results in the maintenance log to track performance trends.

Preventative overhaul schedule — every 4,000 hours or 2 years: For high‑use mining trucks, Sany recommends a full overhaul or replacement of the Sany Oil Pump Assy every 4,000 operating hours or 2 years.

Overhaul the plunger pump with a genuine seal kit, replacing all wear components (slippers, cylinder block, valve plate, piston assemblies). Rebuild the gear pump with a new seal kit and inspect gear teeth for wear beyond 0.1 mm depth.

Replace all split flange O‑rings and sealing washers. Replace all mounting fasteners, as thread locker effectiveness degrades with age. Keep a detailed maintenance log tracking fluid change dates, pump test results, and overhaul history.

By following this proactive schedule, the Sany Oil Pump Assy can reliably exceed 8,000 hours of service.

The plunger pump (B220301000588) is a variable‑displacement axial piston pump. This design allows the pump to deliver only the flow required by the lifting circuit at any given moment, reducing power consumption and heat generation compared to fixed‑displacement pumps.

When the dump body is not being raised or lowered, the pump destrokes to a minimal flow, lowering engine load and reducing fuel consumption. The pump housing is manufactured from high‑strength cast iron with integrated porting that eliminates external piping between the pump sections.

The gear pump (A220301000288) is a fixed‑displacement unit that supplies oil to the steering circuit, pilot control circuits, and lubrication systems. Unlike the plunger pump, the gear pump runs continuously at full displacement whenever the engine is running.

This pump is equipped with pressure‑balanced wear plates that maintain high volumetric efficiency throughout its service life. The gear pump is flange‑mounted directly to the rear of the plunger pump, creating a compact, integrated package that simplifies installation and reduces the number of external hydraulic connections that could leak.

For Sany mining trucks operating in extreme cold climates (below -25°C), special considerations apply to the Sany Oil Pump Assy. Use low‑viscosity hydraulic fluid (ISO VG 22) to ensure adequate flow during cold starts.

Allow the engine to idle for 10‑15 minutes before applying full load to the hydraulic system, allowing the fluid to warm and the pump to establish proper lubrication. The plunger pump’s variable displacement mechanism may be slower to respond in cold conditions; cycle the dump body slowly several times before full operation.

The O‑rings remain flexible down to -40°C, but the pump drive shaft seal may be more prone to leakage at low temperatures—inspect regularly.

The Sany Oil Pump Assy is also available as part of a complete hydraulic system rebuild kit, which includes the pump assembly, a new hydraulic filter, all suction and return hoses, and a full set of sealing washers and O‑rings.

Sany recommends this complete‑kit approach for vehicles with over 8,000 operating hours, as it allows the entire hydraulic power generation system to be renewed in a single maintenance event, minimizing downtime and maximizing return on investment.

Fleet managers using this strategy report a 45% reduction in hydraulic system‑related breakdowns. Contact our parts specialists through the Get Quotation button for custom kits.