Excavator Hydraulic Pump Components Hpv55t Hpv75 Hpv105 Hpv135 Hpv165 Hpv210 Hpv280 Hydraulic Pump Repair Kit
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
7-15days
Product Description
Excavator Hydraulic Pump Components Hpv55t Hpv75 Hpv105 Hpv135 Hpv165 Hpv210 Hpv280 Hydraulic Pump Repair Kit
Serving as the core power component of excavator hydraulic circuits, the main hydraulic pump obtains driving force from the engine to convert mechanical energy into high-pressure hydraulic energy. It delivers pressurized hydraulic fluid to hydraulic motors to enable all working movements of the excavator. Most engineering construction excavators are fitted with axial variable displacement piston pumps. Medium and large excavator models use integrated dual main pumps and a rear pilot gear pump unit. Two independent high-pressure oil supply circuits supply oil to the main control valve, supporting compound working motions, with a rated working pressure ranging from 28MPa to 35MPa. The low-pressure pilot pump mounted at the machine tail runs at 3–4MPa with low flow output, providing pilot pressure oil for control handle and main valve spool control. Piston groups fixed on the cylinder block and pump shell rotate along with the main shaft, completing oil absorption and pressurization processes. Changing the swash plate inclination angle adjusts piston stroke, which modulates the pump’s displacement value. The external servo regulator controls swash plate movement based on hydraulic feedback signals. Increasing the tilt angle improves flow rate and operation speed, while decreasing it reduces fuel consumption and avoids engine shutdown. The valve plate divides low-pressure inlet and high-pressure outlet passages to realize hydraulic oil distribution. The pump is equipped with three core control functions for reliable operation. Constant power control automatically lowers pump displacement under increased load conditions, protecting the engine and raising power utilization efficiency. The LS load-sensing system supplies flow according to actual working demands and maintains low idle displacement to save fuel. The HP pressure limiting function cuts pump displacement at peak pressure values, protecting hydraulic pipelines and oil cylinders from rupture damage. Common malfunctions include internal leakage due to worn pistons, broken valve plates or blocked regulators, leading to slow operation speed and insufficient power output. A locked maximum-displacement regulator will cause engine overload, black smoke exhaust and stalling during heavy-duty operation. Excessive internal leakage turns pressure loss into thermal energy, triggering abnormal hydraulic oil temperature rise. System air intake, insufficient hydraulic oil level, and damaged bearings or pistons will generate abnormal operating noise. Daily maintenance requires regular replacement of hydraulic oil and filter elements to prevent abrasion of precision internal components. Ensure good tightness of oil suction pipes to prevent air ingestion and machine vibration, and keep hydraulic fluid at the standard level to maintain stable pump performance.
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Machinery Test Report
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Provided |
Warranty
|
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
|
HPV75 | MOQ |
1 Piece
|
| 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
|
Standard Size
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Packing | Wooden Box |
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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