Name: Hydraulic Pump PVD-1B-28P-8AG4 4331671 4358274 4399045 Hydraulic Piston Pump for EX30 Cx26c Excavator Main Pump
Brand: Lanzhou Fudong Guangqi Trading Co., Ltd
SKU: PVD-1B-24BP-8AG5
Availability: InStock

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Hydraulic Pump PVD-1B-28P-8AG4 4331671 4358274 4399045 Hydraulic Piston Pump for EX30 Cx26c Excavator Main Pump

Hydraulic Piston Pump for EX30 Excavator

Hydraulic Main Pump with warranty

PVD-1B-28P-8AG4 Hydraulic Pump

Place of Origin:

China

Model Number:

PVD-1B-24BP-8AG5

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Product Details

Packing:

Wooden Box

Highlight:

Hydraulic Piston Pump for EX30 Excavator

Hydraulic Main Pump with warranty

PVD-1B-28P-8AG4 Hydraulic Pump

Payment & Shipping Terms

Minimum Order Quantity

1 Pc

Packaging Details

Carton

Delivery Time

7-15days

Payment Terms

T/T

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+8615294125097

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Product Description

Hydraulic Pump PVD-1B-28P-8AG4 PVD-1B-32P PVD-1B-31BP-8AG5-4865B Hydraulic Piston Pump for EX30 Cx26c Excavator Main Pump

Acting as the primary power constituent of excavator hydraulic systems, the main hydraulic pump relies on engine propulsion to transform mechanical energy into high-pressure hydraulic potential energy. By conveying pressurized hydraulic medium to hydraulic motors, it enables all functional operating actions of construction excavators. The majority of engineering-grade excavators are outfitted with axial variable displacement piston pumps. Large and medium excavator models feature an integrated twin main pump system coupled with a rear pilot gear pump module. Two autonomous high-pressure oil supply circuits feed hydraulic fluid to the main control valve, enabling synchronized compound working motions within a 28MPa–35MPa rated working pressure range. The low-pressure pilot pump installed at the machine tail maintains stable operation at 3–4MPa with low flow rates, providing calibrated pilot pressure oil for control lever operation and main valve core adjustment. Piston groups fixed to the cylinder block and pump casing rotate in tandem with the main shaft, executing cyclic oil suction and pressure buildup processes. Adjustments to the swash plate tilt angle modify piston stroke dimensions, which governs the pump’s displacement capacity. An external servo controller adjusts swash plate posture based on dynamic hydraulic feedback data. A steeper swash plate angle elevates fluid flow rate and operational efficiency, whereas a shallower angle minimizes fuel consumption and prevents engine flameout. The valve plate partitions low-pressure inlet ducts and high-pressure outlet ducts to realize systematic hydraulic oil distribution. The pump integrates three pivotal control functions to ensure fail-safe operation under various working conditions. Constant power control logic automatically scales down pump displacement under rising load pressure, protecting the engine assembly and improving comprehensive power utilization. The LS load-sensing mechanism provides on-demand fluid flow corresponding to actual working loads and maintains low idle displacement for effective fuel conservation. The HP pressure limiting function restricts maximum pump displacement at peak pressure values, preventing rupture and structural damage to hydraulic piping and oil cylinders. Recurring equipment faults involve internal leakage stemming from degraded pistons, cracked valve plates or clogged regulating components, resulting in slow operational response and insufficient power delivery. A seized maximum-displacement regulator induces engine overload, exhaust black smoke and operational stalling during heavy-duty construction tasks. Excessive internal oil leakage converts pressure attenuation into heat, causing abnormal temperature spikes in hydraulic fluid. Air intrusion into the hydraulic system, substandard oil levels, and damaged bearing or piston components produce anomalous mechanical noise. Daily equipment upkeep requires periodic renewal of hydraulic oil and filter cartridges to mitigate wear of precision internal pump parts. Operators must verify intact sealing of oil suction pipelines to prevent air ingestion and mechanical vibration, and uphold standard hydraulic fluid levels to preserve stable pump operational performance.

Machinery Test Report	Provided	Warranty	3 Months
Video outgoing-inspection	Provided	Brand Name	OEM
Place of Origin	China	Product Name	Hydraulic Pump
Model	PVD-1B-28P-8AG4	MOQ	1 Piece
Quality	High-Quality	Delivery time	7-15 Days
Standard or Nonstandard	Standard	Application	Excavator Machinery
Size	Standard Size	Packing	Wooden Box

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Hydraulic Pump PVD-1B-28P-8AG4 4331671 4358274 4399045 Hydraulic Piston Pump for EX30 Cx26c Excavator Main Pump

Hydraulic Piston Pump for EX30 Excavator

Hydraulic Main Pump with warranty

PVD-1B-28P-8AG4 Hydraulic Pump

Hydraulic Piston Pump for EX30 Excavator

Hydraulic Main Pump with warranty

PVD-1B-28P-8AG4 Hydraulic Pump

YANMAR ViO27-5B 17245873501 17245873611 Mini Excavator Hydraulic Main Pump PVD-1B-24BP-8AG5 for Construction Machinery High Pressure Gear Pump

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