Excavator Parts K5V80DTP-HNOV(PTO) Hydraulic Main Pump DH150-7 Hydraulic Pump DH150-7 Hydraulic Pump
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
7-15days
Product Description
Excavator Parts K5V80DTP-HNOV(PTO) Hydraulic Main Pump DH150-7 Hydraulic Pump DH150-7 Hydraulic Pump
Function
The hydraulic main pump acts as the core power component of excavator hydraulic circuits. Driven by the prime engine, it realizes the conversion from mechanical energy to high-pressure hydraulic energy, and transports pressurized medium to boom, stick, bucket, travel and swing hydraulic motors to drive all operational movements.
The hydraulic main pump acts as the core power component of excavator hydraulic circuits. Driven by the prime engine, it realizes the conversion from mechanical energy to high-pressure hydraulic energy, and transports pressurized medium to boom, stick, bucket, travel and swing hydraulic motors to drive all operational movements.
Type
Axial variable displacement piston pumps are widely applied on engineering excavators. Medium and large tonnage excavators adopt integrated dual main pumps equipped with a rear pilot gear pump.
The dual high-pressure pump adopts dual independent oil supply passages, which feed oil to different ports of the main control valve to realize composite actions, with working pressure of 28~35MPa.
The low-pressure pilot pump mounted on the pump tail operates at 3~4MPa with low flow rate, and provides pilot control oil for operating handles and main valve spools.
Axial variable displacement piston pumps are widely applied on engineering excavators. Medium and large tonnage excavators adopt integrated dual main pumps equipped with a rear pilot gear pump.
The dual high-pressure pump adopts dual independent oil supply passages, which feed oil to different ports of the main control valve to realize composite actions, with working pressure of 28~35MPa.
The low-pressure pilot pump mounted on the pump tail operates at 3~4MPa with low flow rate, and provides pilot control oil for operating handles and main valve spools.
Internal Parts
Housing and cylinder block: Multiple piston assemblies rotate synchronously with the main shaft to complete oil suction and pressure buildup.
The swash plate changes its tilt angle to adjust piston stroke and pump volumetric displacement.
The external servo regulator drives the swash plate according to hydraulic feedback signals. Increased tilt angle raises displacement and flow rate to speed up operation; reduced tilt angle lowers fuel consumption and eliminates engine stall risk.
The valve plate separates the low-pressure inlet and high-pressure outlet to complete fluid distribution.
Housing and cylinder block: Multiple piston assemblies rotate synchronously with the main shaft to complete oil suction and pressure buildup.
The swash plate changes its tilt angle to adjust piston stroke and pump volumetric displacement.
The external servo regulator drives the swash plate according to hydraulic feedback signals. Increased tilt angle raises displacement and flow rate to speed up operation; reduced tilt angle lowers fuel consumption and eliminates engine stall risk.
The valve plate separates the low-pressure inlet and high-pressure outlet to complete fluid distribution.
Three Control Modes
Constant power regulation reduces pump displacement automatically under increased load to protect the engine from stall and achieve full power utilization.
LS load sensing system provides flow on demand and maintains low displacement during idling to reduce fuel consumption.
HP pressure limiting function minimizes pump displacement when system pressure reaches the peak value, protecting hydraulic pipelines and cylinders from rupture damage.
Constant power regulation reduces pump displacement automatically under increased load to protect the engine from stall and achieve full power utilization.
LS load sensing system provides flow on demand and maintains low displacement during idling to reduce fuel consumption.
HP pressure limiting function minimizes pump displacement when system pressure reaches the peak value, protecting hydraulic pipelines and cylinders from rupture damage.
Common Failures
Internal leakage caused by worn pistons or valve plate, or regulator blockage, will lead to slow operation and insufficient output power.
Regulator locked at maximum displacement will cause engine overload, black smoke and stall under heavy load conditions.
Excessive internal leakage converts pressure loss into thermal energy and triggers abnormal rise of hydraulic oil temperature.
Air entrainment, insufficient hydraulic fluid or damaged bearings and pistons will result in abnormal operating noise.
Internal leakage caused by worn pistons or valve plate, or regulator blockage, will lead to slow operation and insufficient output power.
Regulator locked at maximum displacement will cause engine overload, black smoke and stall under heavy load conditions.
Excessive internal leakage converts pressure loss into thermal energy and triggers abnormal rise of hydraulic oil temperature.
Air entrainment, insufficient hydraulic fluid or damaged bearings and pistons will result in abnormal operating noise.
Maintenance
Replace hydraulic oil and filter elements periodically to prevent abrasive damage to precision parts. Ensure good tightness of suction pipelines to avoid air intake and equipment vibration. Keep hydraulic fluid at the standard level to prevent pump failure.
Replace hydraulic oil and filter elements periodically to prevent abrasive damage to precision parts. Ensure good tightness of suction pipelines to avoid air intake and equipment vibration. Keep hydraulic fluid at the standard level to prevent pump failure.
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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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K5V80DTP-HNOV(PTO) | 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 | Red |
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