HPV102 Hydraulic Main Pump ZX200 ZX220 Excavator Parts Construction Machinery Parts
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
7-15days
Product Description
HPV102 Hydraulic Main Pump ZX200 ZX220 Excavator Parts Construction Machinery Parts
Serving as the central power component of the excavator hydraulic circuit, the main hydraulic pump receives power from the engine to convert mechanical energy into high-pressure hydraulic energy. It conveys pressurized hydraulic fluid to hydraulic motors to drive all working actions of the excavator. Most engineering excavators are outfitted with axial variable displacement piston pumps. Medium and large construction machines adopt an integrated structure of twin main pumps and a rear pilot gear pump assembly. Two individual high-pressure oil supply lines supply fluid to the main control valve, enabling compound working movements, with a standard working pressure of 28 to 35MPa. The low-pressure pilot pump mounted at the machine tail works at 3–4MPa with low flow output, offering pilot pressure oil for control lever and main valve spool operation. Inside the pump body, piston assemblies installed on the cylinder block and pump shell rotate with the main shaft, finishing the processes of oil suction and pressurization. Adjustments to the swash plate’s tilt angle change piston stroke, which directly modulates pump displacement. The external servo regulator controls swash plate movement according to hydraulic feedback. A larger swash plate angle increases fluid flow and operating speed, whereas a smaller angle reduces fuel usage and prevents engine shutdown under load. The valve plate separates low-pressure inlet and high-pressure outlet channels to complete hydraulic oil distribution work. The pump is equipped with three core control modes. Constant power control lowers pump displacement automatically under growing loads, protecting the engine and boosting power utilization efficiency. The LS load-sensing system supplies fluid flow based on actual working demands and maintains low displacement at idle status to achieve fuel savings. The HP pressure limiting function cuts down pump displacement when pressure reaches the peak value, protecting hydraulic pipelines and cylinders from rupture. Common operational failures include internal leakage caused by worn pistons, broken valve plates or blocked regulators, resulting in slow machine movement and insufficient power output. A locked regulator at maximum displacement will cause engine overload, black smoke exhaust and stalling during heavy-load operation. Excessive internal leakage turns pressure loss into heat, leading to abnormal hydraulic oil temperature rise. Air suction into the system, insufficient hydraulic oil volume, and damaged bearings or pistons will generate abnormal running noise. Daily maintenance requires regular replacement of hydraulic oil and filters to avoid wear on precision internal components. It is necessary to ensure good tightness of suction pipelines to prevent air ingestion and machine vibration, and keep hydraulic oil at the prescribed level to maintain stable pump working performance.
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Machinery Test Report
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Provided |
Warranty
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3 Months |
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Video outgoing-inspection
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Provided | Brand Name |
OEM
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Place of Origin
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China | Product Name |
Hydraulic Pump
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Model
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HPV102 | MOQ |
1 Piece
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| Quality |
High-Quality
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Delivery time
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7-15 Days
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Standard or Nonstandard
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Standard
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Application
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Excavator Machinery
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Size
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Standard Size
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Color | Black |
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Company
Lanzhou Fudong Guangqi Trading Co., Ltd
Location
No. 7 West South Binhe Road, Xigu District, Lanzhou City, Gansu Province, China
Contact Person
Liang