K3V112DT-1LHR-9C32 12T Hydraulic Main Pump SK200 R210 R215 R225 Excavator Construction Machinery Hydraulic Pump 31N6-10051
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
7-15days
Product Description
K3V112DT-1LHR-9C32 12T Hydraulic Main Pump SK200 R210 R215 R225 Excavator Construction Machinery Hydraulic Pump
Function
Driven by the excavator engine, the hydraulic main pump is the key component of the hydraulic system. It converts mechanical energy into high-pressure hydraulic energy, and delivers pressurized fluid to various hydraulic motors to drive boom, arm, bucket, travel and swing operations.
Type
Axial variable displacement piston pumps are widely adopted on engineering excavators. Medium and large excavators use combined dual main pumps with a rear pilot gear pump.
The two high-pressure pumps have independent oil supply passages, which feed oil to the main control valve to realize composite actions, with working pressure of 28~35MPa.
The low-pressure pilot pump at the pump tail operates at 3~4MPa with low flow, supplying pilot control oil for operating levers and main valve spools.
The two high-pressure pumps have independent oil supply passages, which feed oil to the main control valve to realize composite actions, with working pressure of 28~35MPa.
The low-pressure pilot pump at the pump tail operates at 3~4MPa with low flow, supplying pilot control oil for operating levers and main valve spools.
Internal Parts
The housing and cylinder block contain multiple piston assemblies that rotate with the main shaft to complete oil suction and pressurization.
The swash plate changes its tilt angle to adjust piston stroke and pump displacement. The external servo regulator drives the swash plate based on hydraulic feedback.
Increased tilt angle raises flow rate and operation speed; reduced tilt angle cuts fuel consumption and avoids engine stall.
The valve plate divides low-pressure inlet and high-pressure outlet to distribute hydraulic oil.
The swash plate changes its tilt angle to adjust piston stroke and pump displacement. The external servo regulator drives the swash plate based on hydraulic feedback.
Increased tilt angle raises flow rate and operation speed; reduced tilt angle cuts fuel consumption and avoids engine stall.
The valve plate divides low-pressure inlet and high-pressure outlet to distribute hydraulic oil.
Three Control Modes
Constant power regulation automatically lowers pump displacement under increased load to protect the engine and improve power utilization.
The LS load sensing system provides flow on demand and keeps low displacement during idling to reduce fuel consumption.
The HP pressure limiting function reduces pump displacement at peak pressure to prevent hydraulic pipelines and cylinders from rupture.
The LS load sensing system provides flow on demand and keeps low displacement during idling to reduce fuel consumption.
The HP pressure limiting function reduces pump displacement at peak pressure to prevent 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 output power.
Regulator locked at maximum displacement will cause engine overload, black smoke and stall under heavy load.
Excessive internal leakage generates heat from pressure loss and causes hydraulic oil temperature to rise abnormally. Air entrainment, insufficient oil or damaged parts will produce abnormal noise.
Regulator locked at maximum displacement will cause engine overload, black smoke and stall under heavy load.
Excessive internal leakage generates heat from pressure loss and causes hydraulic oil temperature to rise abnormally. Air entrainment, insufficient oil or damaged parts will produce abnormal noise.
Maintenance
Replace hydraulic oil and filters periodically to prevent precision parts from abrasive wear. Keep suction pipelines sealed well to avoid air intake and equipment vibration. Maintain hydraulic fluid at standard level.
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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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K3V112DT-1LHR-9C32 12T | 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
|
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