Hydraulic Main Pump K3V112DTP - 9T8L SY205 Main Pump SY215 Main Pump SY2158L Main Pump Hydraulic Pump Excavator
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
7-15days
Product Description
Hydraulic Main Pump K3V112DTP - 9T8L SY205 Main Pump SY215 Main Pump SY2158L Main Pump Hydraulic Pump Excavator
Function
The hydraulic main pump is the primary power component of excavator hydraulic systems. Driven by the engine, it converts mechanical energy into high-pressure hydraulic energy, and delivers pressurized medium to hydraulic motors to drive boom, stick, bucket, travel and swing operations.
Type
Axial variable piston pumps are extensively used on engineering excavators. Medium and large excavators adopt integrated dual main pumps with a rear pilot gear pump.
The dual high-pressure pumps have independent oil supply routes, feeding the main control valve for composite actions, with working pressure 28~35MPa.
The low-pressure pilot pump at the pump tail operates at 3~4MPa with low flow, providing pilot control oil for operating handles and main valve spools.
The dual high-pressure pumps have independent oil supply routes, feeding the main control valve for composite actions, with working pressure 28~35MPa.
The low-pressure pilot pump at the pump tail operates at 3~4MPa with low flow, providing pilot control oil for operating handles and main valve spools.
Internal Parts
Multiple piston assemblies inside the housing and cylinder block rotate with the main shaft to complete oil suction and pressurization.
The swash plate adjusts tilt angle to change piston stroke and pump displacement. The external servo regulator controls the swash plate via hydraulic feedback signals.
A larger tilt angle increases flow and operation speed; a smaller angle reduces fuel consumption and prevents engine stall.
The valve plate separates low-pressure inlet and high-pressure outlet for hydraulic fluid distribution.
The swash plate adjusts tilt angle to change piston stroke and pump displacement. The external servo regulator controls the swash plate via hydraulic feedback signals.
A larger tilt angle increases flow and operation speed; a smaller angle reduces fuel consumption and prevents engine stall.
The valve plate separates low-pressure inlet and high-pressure outlet for hydraulic fluid distribution.
Three Control Modes
Constant power regulation automatically lowers pump displacement under increased load to protect the engine and optimize power use.
The LS load sensing system provides flow on demand and keeps low displacement at idle to cut fuel consumption.
The HP pressure limiting function minimizes pump displacement at peak pressure to protect hydraulic pipelines and cylinders from rupture.
The LS load sensing system provides flow on demand and keeps low displacement at idle to cut fuel consumption.
The HP pressure limiting function minimizes pump displacement at peak pressure to protect hydraulic pipelines and cylinders from rupture.
Common Failures
Internal leakage caused by worn pistons, damaged valve plates or blocked regulators leads to slow operation and insufficient power output.
Regulator locked at maximum displacement causes engine overload, black smoke and stall under heavy loads.
Excessive internal leakage generates extra heat and causes hydraulic oil temperature to rise abnormally. Air entrainment, low hydraulic fluid or damaged bearings and pistons result in abnormal noise.
Regulator locked at maximum displacement causes engine overload, black smoke and stall under heavy loads.
Excessive internal leakage generates extra heat and causes hydraulic oil temperature to rise abnormally. Air entrainment, low hydraulic fluid or damaged bearings and pistons result in abnormal noise.
Maintenance
Replace hydraulic oil and filters regularly to prevent abrasive damage to precision parts. Keep suction pipelines tightly sealed to avoid air intake and equipment vibration. Maintain hydraulic fluid at the standard level to ensure normal pump operation.
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Machinery Test Report
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Provided |
Warranty
|
3 Months |
|
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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K3V112DTP - 9T8L | 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
|
Excavator Machinery
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Size
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Standard Size
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Color | Black |
Company Profile
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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