Bomba Hidráulica Principal Hitachi ZAX70-5A / ZAX70-5G – Nova Original (YD00013056 / K7SP36)

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Informações detalhadas

Engineered by Kawasaki, precision‑matched to Hitachi. Delivers the three‑circuit flow your 7‑ton excavator demands.

The K7SP36 is not a generic replacement pump. It is a dual‑section axial piston pump with a separate pilot gear pump, factory‑engineered by Kawasaki specifically for 6–8‑ton Hitachi mini excavators. Your machine originally left the factory with this exact hydraulic architecture – not an aftermarket compromise, not a remanufactured core. This is a brand‑new, genuine pump built to the same tolerances and tested to the same standards as the unit that powered your ZAX70-5A or ZAX70-5G on day one.

1. Principais recursos e benefícios

The K7SP36 is part of a twin‑pump series arrangement that makes the ZAX70-5 series one of the most responsive 7‑ton machines in its class. On the ZX70-5G, this K7SP36 unit is connected in series with a K7V28 pump. Together, they split the excavator’s hydraulic demand between high‑flow working circuits (boom, arm, bucket) and high‑pressure travel/swing circuits – without robbing power from one function to feed another.

• Genuine Hitachi OEM specification – OEM part number YD00013056 for the K7SP36 series pump. This is the exact replacement for ZAX70-5A, ZAX70-5G, ZX70-5A, ZX70-5G, ZX75UR-3, ZX75US-3, ZX85US-3, plus Kobelco SK75-8/SK75-10 and Case CX80/CX85D mini excavators.

• Dual‑section, twin‑pump hydraulic architecture – The 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. On the ZX70-5G, this unit is connected in series with a K7V28 pump, collectively constituting the hydraulic pump assembly. This power‑splitting design delivers flow to independent circuits, ensuring smooth, responsive multi‑function operation without internal power loss.

• High operating pressure for 7‑ton class work – Designed for a maximum pressure of 35 MPa (≈5,076 psi) and a maximum speed of up to 2,500 rpm. This pressure capability matches the ZAX70-5A/5G main relief valve settings, delivering consistent digging force, swing torque, and travel power hour after hour.

• Integral gear pump for pilot control circuit – The pilot circuit is supplied by a separate gear pump section inside the K7SP36 assembly. On the ZAX70-5G, the pilot oil circuit operates at 3.9 MPa with a flow rate of 21 L/min – enough to keep joystick response sharp and independent of the main pump load.

• High‑strength Kawasaki / Hitachi construction – Built with induction‑hardened cylinder blocks, coated piston slippers, precision‑matched valve plates, and high‑strength alloys. Advanced sealing systems and internal lubrication pathways reduce friction, prevent contamination ingress, and maintain consistent hydraulic power through thousands of operating hours with minimal performance degradation.

• Factory flow rate matched to ZAX70 machines – The ZAX70-5G delivers a total flow of 2 × 63 L/min from the two main pumps plus 52.5 L/min from the third pump, with the pilot pump flow slightly reduced from 22.5 to 21 L/min compared to earlier 70 models. This flow rate translates directly to smoother multi‑function action and faster cycle times.

• Substituição direta do tipo "aparafusar e usar" – Mounting flange, drive shaft spline, port configurations, and bolt patterns match your ZAX70-5A/5G exactly. Your mechanic unbolts the old pump and bolts this one in. No modifications, no adapters, no fabrication.

• Verificação visual pré-envio – Before packing, we send you clear, high‑resolution photographs of your actual pump: mounting flange, splines, port threads, and castings. You approve shipment – we never ship blind.

• Entrega rápida – 5–8 working days from our Guangzhou warehouse. Monthly supply capacity 300 units.

2. Aplicativos

The K7SP36 main hydraulic pump is the power source for 6–8‑ton Hitachi and compatible mini excavators. A genuine new pump delivers consistent, factory‑spec performance where it matters most:

• Construção urbana e utilidades – Sidewalk repairs, water/gas line trenching, fibre‑optic cable installation, and small‑scale demolition in tight access spaces. The K7SP36’s three‑circuit hydraulic layout keeps boom, bucket, and travel independent – swing the cab while curling the bucket without losing power to either function. The dual‑section design maintains smooth, coordinated operation even with multiple simultaneous movements, critical for urban job sites where space is limited.

• – Reparos de calçadas, valas para linhas de água e gás, instalação de cabos de fibra óptica. O design compacto tudo-em-um do PHV-4B oferece controle de deslocamento preciso, enquanto a mudança de duas velocidades permite reposicionamento rápido em canteiros de obras de rua longos. As características de partida e parada suaves evitam danos a superfícies acabadas. – Pool digs, retaining walls, grading, and drainage work in residential neighborhoods demand low noise and vibration. The K7SP36’s precise flow control and Kawasaki hydraulic architecture deliver quiet operation and predictable response – no jerky movements near finished surfaces. The ZAX70-5G also offers switchable standard and breaker modes, allowing attachment flow to be tailored for heavy hammers.

• – Escavações de piscinas, muros de contenção, nivelamento e trabalhos de drenagem em bairros residenciais exigem baixo ruído e vibração. A operação hidráulica silenciosa do PHV-4B reduz reclamações da vizinhança, e seu alto torque em baixa velocidade fornece a tração necessária para solo compactado e argila. – Drainage ditch cleaning, irrigation trenching, pond maintenance, and fence post holes. The pump’s high pressure output (35 MPa) provides the tractive force and attachment power needed for pulling through soft, muddy fields.

• – Limpeza de valas de drenagem, valas de irrigação, manutenção de lagoas, buracos para postes de cerca e limpeza leve de vegetação rasteira. A vedação aprimorada mantém água, silte e detritos orgânicos fora da caixa de engrenagens. O alto torque no modo de baixa velocidade puxa a máquina através de campos macios e lamacentos. – Site cleanup, drainage maintenance, equipment pad grading, and light aggregate handling. Abrasive dust and sharp rock fragments demand robust sealing and wear‑resistant internal components – the K7SP36’s induction‑hardened cylinder blocks and coated piston slippers are engineered for these harsh conditions.

• Manutenção de frotas de equipamentos para aluguel – Mini excavators are among the most frequently rented machines. A pump failure during a rental causes costly emergency recovery, lost revenue, and customer complaints. A genuine new pump provides predictable service life (6,000–8,000 hours) and allows you to budget for replacements without the risk of mid‑rental failures.

• – Miniescavadeiras estão entre as máquinas mais frequentemente alugadas. Múltiplos operadores com hábitos de condução variados aceleram o desgaste dos acionamentos finais. Um motor de deslocamento novo genuíno fornece vida útil previsível (mais de 5.000 horas) e evita falhas dispendiosas no meio do aluguel, contas de reboque e reclamações de clientes. – Steep slopes, fallen timber, hidden obstacles. The Kawasaki pump control system prevents engine stall when sudden load spikes occur, maintaining consistent hydraulic power for saw attachments and grapples.

3. FAQ - Perguntas frequentes

Q1: Is this pump an exact replacement for my ZAX70-5A or ZAX70-5G?
A: Yes. The YD00013056 (K7SP36) is the factory‑spec main pump for Hitachi ZAX70-5A and ZAX70-5G (also known as ZX70-5A / ZX70-5G). It also directly fits Hitachi ZX75UR-3, ZX75US-3, ZX85US-3, Kobelco SK75-8, SK75-10, and Case CX80, CX85D mini excavators. 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 genuine pump or a remanufactured unit?
A: It is brand new / genuine original, not remanufactured. All internal components are new. The pump is manufactured by Kawasaki to Hitachi‘s original specifications (Japanese origin) and meets all OEM performance standards.

Q3: What is the difference between the K7SP36 and the K7V28?
A: The K7SP36 and K7V28 are connected in series on the ZX70-5G excavator, collectively constituting the complete hydraulic pump assembly. The K7SP36 is the dual‑section main pump (36 cm³/rev) delivering two flow circuits, while the K7V28 is an additional pump section for other functions.

Q4: Do I need to modify anything to install this pump?
A: No. The mounting flange, spline, and port configurations match the Hitachi K7SP36 exactly. However, because the K7SP36 and K7V28 are in series, verify that both pumps are replaced together if the serial arrangement has been compromised.

P5: Quanto tempo leva para a entrega?
A: Delivery is 5–8 working days after order confirmation from our Guangzhou warehouse. Express shipping (DHL, FedEx, UPS) is available for urgent orders.

P6: Quais formas de pagamento vocês aceitam?
R: T/T, XTransfer, PayPal, Western Union.

Q7: Do you offer a warranty?
R: O período de garantia é de 3 a 6 meses, dependendo dos detalhes do produto. Não fornecemos serviço de garantia para peças originais genuínas. For warranty‑covered options, ask our sales team.

Q8: How can I verify the pump is genuine before shipping?
A: Before packing, we send you clear, high‑resolution photographs of the actual unit. You approve shipment only after reviewing these images. We never ship blind.

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