Hitachi ZAX70-5A / ZAX70-5G Main Hydraulic Pump – China Remanufactured (YD00013056 / K7SP36)

Description

Product Video

Detail Information

Note: The application information provided is for reference only. Please confirm the part number and compare it with the old component before purchasing. If you have any questions, please feel free to contact us.
It is worth choosing a product that features stable performance, high reliability, easy installation, and quick response.

1. Key Features & Benefits

• Factory-spec remanufactured Kawasaki K7SP36 pump – This pump (OEM YD00013056, model K7SP36) is an axial piston swash plate hydraulic pump of dual-section design with a displacement of 36 cm³/rev, delivering two separate flow circuits. It has been completely disassembled, cleaned, crack‑inspected, and rebuilt in our ISO‑certified facility. All wear components – cylinder block, piston assemblies, valve plate, swashplate, bearings, and seals – are replaced with new, high‑quality parts. The result is performance and reliability comparable to a new unit at a fraction of the cost.

• Original Kawasaki design for 7‑ton class excavators – The K7SP36 is designed for a maximum pressure of up to 35 MPa (350 bar) and a maximum speed of up to 2,500 rpm. It powers the boom, arm, bucket, swing, and travel circuits with smooth, responsive hydraulic flow. This is the exact pump platform used on Hitachi ZAX70-5G, ZAX70-5A, ZX70-5G, ZX70-5A, ZX75UR-3, ZX75US-3, ZX85US-3 mini excavators.

• Restored 7‑ton class hydraulic power – After remanufacturing, this pump delivers rated working pressure of 35 MPa (≈5,076 psi). Your excavator regains full digging force, fast cycle times, and precise attachment control – exactly as when the machine was new.

• Integrated load‑sensing (power control) system – The factory control system is fully rebuilt and calibrated. It continuously matches pump output to actual working demand, reducing fuel consumption, preventing engine stall under sudden load, and extending the life of the hydraulic system.

• New bearings and precision‑ground wear surfaces – All bearings are replaced – never reused. The cylinder block and valve plate are re‑ground to restore flatness, ensuring minimal internal leakage, cooler oil, and better efficiency.

• Direct bolt‑on replacement – Mounting flange, drive shaft spline, and hydraulic port configurations are restored to original Hitachi/Kawasaki specifications. No modifications, no adapters – your mechanic unbolts the old pump and bolts this one in.

• Hydraulic test stand validated – Each remanufactured pump is run on a test stand to verify rated pressure, flow, case drain leakage, and control response. A test report is available upon request.

• Pre‑shipment visual verification – We send you clear, high‑resolution photographs of the actual pump (mounting flange, splines, port threads, castings) before packing. You approve – we ship. Never blind.

• Fast delivery – 5–8 working days from our Guangzhou warehouse. Monthly capacity 300 units.

2. Applications

The remanufactured Hitachi ZAX70-5A / ZAX70-5G main pump is ideal for 7‑ton class excavators used in a variety of job sites:

• Urban construction & utilities – Sidewalk repairs, water/gas line trenching, fibre‑optic cable installation. The pump’s dual‑section design provides independent flow to separate circuits, delivering precise control for delicate digging near existing utilities while offering enough power for breaking compacted surfaces.

• Residential landscaping & pool excavation – Pool digs, retaining walls, grading, and drainage work. The pump’s smooth response and quiet operation are essential for noise‑sensitive neighbourhoods.

• Agriculture & land management – Drainage ditch cleaning, irrigation trenching, pond maintenance, and fence post holes. The pump’s high pressure (35 MPa) provides the attachment power needed for augers, trenchers, and rippers.

• Mining support & quarry maintenance – Site cleanup, equipment pad grading, and light aggregate handling. Abrasive dust and vibration demand robust seals and bearings – our reman process delivers new components to withstand these harsh conditions.

• Equipment rental fleet – Mini excavators are the most frequently rented machines. A remanufactured pump offers predictable service life (3,000–5,000 hours) at a cost that makes proactive replacement financially sensible – avoiding costly mid‑rental failures.

• Forestry & vegetation clearance – Steep slopes, fallen timber, hidden obstacles. The integral power control prevents engine stall under sudden load spikes, maintaining consistent power for saws, grapples, and mulchers.

3. FAQ – Frequently Asked Questions

Q1: Is this pump an exact replacement for my ZAX70-5A or ZAX70-5G?
A: Yes. The K7SP36 (OEM YD00013056) is the factory‑spec main pump for Hitachi ZAX70-5A, ZAX70-5G, ZX70-5A, ZX70-5G, ZX75UR-3, ZX75US-3, and ZX85US-3 mini excavators. It is also used on Kobelco SK75-8, SK75-10, and Case CX80, CX85D. To confirm compatibility, send us your machine serial number and a photo of the old pump nameplate – we will verify within 2 hours.

Q2: Is this a new pump or a remanufactured unit?
A: It is professionally remanufactured. All internal wear components (bearings, seals, cylinder block, valve plate, pistons) are replaced or re‑ground to OEM specs. The result is a pump that performs like new – at a fraction of the cost.

Q3: Do you offer a warranty?
A: Warranty period is 3 to 6 months depending on product details. We do not provide warranty service for original used or remanufactured parts. Our value is delivered upfront: careful remanufacturing, thorough testing, and pre‑shipment visual verification. For customers who require a warranty‑covered option, we can quote new aftermarket units – ask our sales team.

Q4: How long does delivery take?
A: Delivery is 5–8 working days after order confirmation from our Guangzhou warehouse. Express shipping (DHL/FedEx/UPS) is available for urgent orders.

Q5: What payment methods do you accept?
A: We accept T/T (wire transfer), XTransfer, PayPal, and Western Union.

Q6: What is the weight and size of this pump?
A: The pump weighs approximately 67 kg and dimensions are approximately 35 × 45 × 45 cm.

Q7: How can I verify the pump is ready before shipping?
A: Before packing, we send you clear, high‑resolution photographs of the actual unit – mounting flange, splines, port threads, casting marks, and overall condition. You approve shipment only after reviewing these images. We never ship blind.

Q8: What oil should I use with this pump?
A: Hitachi recommends ISO VG 46 hydraulic oil for standard temperatures. For high‑temperature environments or continuous heavy duty, ISO VG 68 is recommended. Always refer to your machine operator‘s manual.

Still have questions? Contact Hongtengda Parts – we reply within 24 hours.