مضخة هيدروليكية Kawasaki K5V200DT-9N44 31QB-10030 لـ حفارة Hyundai R485VS

R485VS Hydraulic Main Pump | 31QB‑10030 K5V200DT‑9N44 Axial Piston Pump | Hyundai Excavator Aftermarket Replacement Parts

Product Brief

This K5V200DT‑9N44 dual‑variable axial piston main pump, OEM number 31QB‑10030, serves as the core hydraulic power unit for Hyundai heavy‑duty R485VS excavator. Designed for 48‑ton class heavy earth‑moving, quarry excavation and rock‑digging assignments, it converts engine mechanical energy into high‑pressure hydraulic flow to sustain heavy digging, boom lifting, swing operation and continuous long‑shift site work. This aftermarket pump is widely sourced by mining contractors, field repair workshops and cross‑border spare‑part distributors across Africa, Middle East and Latin America for equipment overhaul and direct component replacement.

Under persistent heavy impact load and high‑temperature operating conditions, large‑tonnage main pumps are prone to cylinder block scuffing, piston shoe abrasion, valve plate damage and progressive internal leakage. Typical failure manifestations include insufficient digging breakout force, lagging compound movements, abnormal rise of hydraulic oil temperature, harsh metallic knocking noise from pump housing and obvious power attenuation. Sudden pump breakdown at quarry or construction sites will trigger lengthy equipment downtime and bring substantial economic losses for project operators.

Our aftermarket main pump strictly replicates OEM specifications for mounting flange dimension, spline parameters, solenoid valve interface and system pressure setting. No cutting or secondary modification is required during on‑site swap, supporting direct drop‑in installation to minimize machine idle time. As a cost‑effective alternative to high‑priced original assemblies with extended lead‑times, this pump delivers stable hydraulic output under factory wholesale pricing, perfectly matching bulk procurement demands for heavy machinery spare‑part suppliers.

Unique Product Competitive Advantages

1. Precisely calibrated for Hyundai R485VS electronic‑controlled hydraulic system, non‑interchangeable with other heavy excavator models
Manufactured against original installation drawing standards, this main pump maintains consistent solenoid mounting position, oil port layout and pressure calibration parameters. Well‑matched friction pairs effectively lower inner leakage after assembly. No adapter block or extra machining work is needed for replacement.
2. Reinforced friction pair components to prolong service life under heavy‑load quarry conditions
Numerous low‑cost substitute pumps suffer rapid performance decay under rock‑digging conditions due to inferior friction‑pair raw materials. Our core internal components adopt standardized heat‑treatment and fine‑grinding craft, improving anti‑wear performance amid sharp load fluctuation. It helps equipment fleet operators cut down overall pump replacement frequency for heavily‑utilized heavy excavators.
3. Comprehensive bench performance testing before shipment to eliminate hidden on‑site failure risks
Every finished hydraulic pump completes pressure endurance test, flow calibration and leakage inspection on professional hydraulic test bench prior to packing. Defective units are filtered out inside factory, avoiding re‑work burdens for maintenance crews and unexpected shutdown losses on construction or quarry sites.
4. Economical aftermarket solution to control heavy‑equipment operational expenditure
Genuine OEM main pumps for 48‑ton excavators come with steep purchase cost and long delivery cycle. Our aftermarket pump achieves comparable working performance at factory direct price, effectively reducing annual maintenance expense for enterprises managing multiple large‑size excavator units.
5. Flexible global logistics solutions for wholesale purchasers
In‑stock goods can be dispatched rapidly upon payment confirmation. Air freight is available for urgent breakdown repair orders; consolidated sea freight and full‑container service deliver cost‑saving options for long‑term bulk buyers.

Factory Production Strength

Our manufacturing facility focuses on R&D and production of aftermarket hydraulic main pumps, travel motors and swing motors covering multiple heavy‑duty excavator brands. We possess complete production workflows including alloy steel forging, precision grinding, professional heat‑treatment processing and finished‑product hydraulic bench test. Dedicated simulation test equipment reproduces real‑world quarry heavy‑load operating status to continuously optimize component wear resistance and pressure stability. Our hydraulic assemblies are exported to multiple overseas regions and maintain stable long‑term partnerships with global construction machinery spare‑part wholesalers.

Frequently Asked Customer Questions

Q1: Can this 31QB‑10030 K5V200DT‑9N44 main pump fit excavator models other than Hyundai R485VS?
A1: Cross‑model installation is not supported. Different heavy excavator models adopt main pumps with different flange sizes, solenoid parameters and pressure setup. Please double‑verify machine model and OEM part number before placing orders.

Q2: What typical hydraulic malfunctions can this pump resolve?
A2: It addresses faults triggered by worn pistons, scratched valve plate and damaged internal components: weak digging force, slow compound movements, high hydraulic oil temperature, internal leakage and abnormal knocking noise of main pump.

Q3: Are quantity‑based preferential prices available for bulk‑volume orders?
A3: Yes, tier‑based discount policy applies according to purchase quantity. We can also arrange full‑container sea shipment to cut comprehensive logistics expenditure.

Q4: What packaging solution is adopted for long‑distance ocean transportation?
A4: Anti‑rust oil is coated on all metal surfaces. The whole pump is wrapped by waterproof shock‑proof PE film, then secured inside reinforced export‑grade plywood case, to prevent collision deformation and moisture corrosion during lengthy overseas transit.