Name: Nachi PVD-00B-18B-5 RA211-61113 Hydraulic Piston Pump for Kubota U15-3 Hitachi ZX17 ZX18 Mini Excavator 5G3 5AG3 6AG3 6AG4
Brand: Lanzhou Fudong Guangqi Trading Co., Ltd
SKU: PVD-0B-18B-5
Availability: InStock

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Nachi PVD-00B-18B-5 RA211-61113 Hydraulic Piston Pump for Kubota U15-3 Hitachi ZX17 ZX18 Mini Excavator 5G3 5AG3 6AG3 6AG4

Nachi hydraulic piston pump for Kubota excavator

PVD-00B-18B-5 hydraulic main pump

RA211-61113 excavator pump with warranty

Place of Origin:

China

Model Number:

PVD-0B-18B-5

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Product Details

Packing:

Wooden Box

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Nachi hydraulic piston pump for Kubota excavator

PVD-00B-18B-5 hydraulic main pump

RA211-61113 excavator pump with warranty

Payment & Shipping Terms

Minimum Order Quantity

1 Pc

Packaging Details

Carton

Delivery Time

7-15days

Payment Terms

T/T

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Product Description

Nachi PVD-00B-18B-5 RA211-61113 Hydraulic Piston Pump for Kubota U15-3 Hitachi ZX17 ZX18 Mini Excavator 5G3 5AG3 6AG3 6AG4

Functioning as the key hydraulic power unit for excavator equipment, the main hydraulic pump is engine-driven to transform mechanical energy into high-pressure hydraulic power for system operation. By transmitting pressurized hydraulic fluid to hydraulic motor units, it enables all mechanical working motions of construction excavators. Most modern construction excavators are equipped with axial variable displacement piston pump systems. Medium and large excavator models utilize an integrated composite unit consisting of dual main pumps and a rear pilot gear pump. Two separate high-pressure oil delivery circuits supply fluid to the main control valve assembly, supporting flexible composite working actions with a rated working pressure ranging from 28MPa to 35MPa. The tail-mounted low-pressure pilot pump runs continuously at 3–4MPa with low flow volume, providing stable pilot pressure oil for joystick control and main valve spool modulation. Piston groups secured on the cylinder block and pump housing revolve alongside the main shaft, completing iterative oil suction and pressurization processes. Altering the inclination of the swash plate adjusts piston travel stroke, which modulates the pump’s effective displacement value. An external servo actuator regulates swash plate movement based on dynamic hydraulic feedback signals. Expanding the swash plate tilt angle improves fluid flow efficiency and machine operating speed, while narrowing the angle reduces fuel usage and prevents engine stalling during operation. The valve plate segregates low-pressure inlet passages and high-pressure outlet passages to realize accurate hydraulic oil distribution. Three integral control functions ensure the pump’s dependable operational stability. Constant power control intelligently decreases pump displacement under increased load conditions, protecting the engine system and boosting power utilization rates. The LS load-sensing system delivers variable fluid flow adapted to on-site working demands and maintains low idle displacement for fuel economy. The HP pressure limiting function suppresses excessive pump displacement at peak pressure levels, preventing burst damage to hydraulic pipelines and hydraulic cylinders. Common operational failures cover internal leakage induced by worn pistons, fractured valve plates or blocked regulator passages, resulting in sluggish machine movement and insufficient power output capacity. A stuck maximum-displacement regulator causes persistent engine overload, black smoke emission and sudden shutdown during heavy-duty construction. Severe internal oil leakage converts hydraulic pressure loss into thermal energy, triggering abnormal overheating of the hydraulic system. Air infiltration into hydraulic circuits, inadequate oil reserves, and damaged bearing or piston components generate abnormal operational noise. Daily maintenance protocols include regular replacement of hydraulic fluid and filter elements to preserve the integrity of precision internal pump parts. Maintaining airtight oil suction pipelines eliminates air ingestion and mechanical vibration, while keeping hydraulic fluid at standard levels ensures consistent pump working performance.

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Nachi PVD-00B-18B-5 RA211-61113 Hydraulic Piston Pump for Kubota U15-3 Hitachi ZX17 ZX18 Mini Excavator 5G3 5AG3 6AG3 6AG4

Nachi hydraulic piston pump for Kubota excavator

PVD-00B-18B-5 hydraulic main pump

RA211-61113 excavator pump with warranty

Nachi hydraulic piston pump for Kubota excavator

PVD-00B-18B-5 hydraulic main pump

RA211-61113 excavator pump with warranty

KX17 1046490005 Excavator Hydraulic Main Pump PVD-00B-15P-6AG3 Piston Pump Excavator Parts

Nachi PVD-00B-18B-5 RA211-61113 Hydraulic Piston Pump for Kubota U15-3 Hitachi ZX17 ZX18 Mini Excavator 5G3 5AG3 6AG3 6AG4

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