K3V140DTP-9T1L Hydraulic Main Pump for Hyundai SY285 Excavator Kawasaki Type Piston Pump 31N8-10010 31N8-10011
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
7-15days
Product Description
K3V140DTP-9T1L Hydraulic Main Pump for Hyundai SY285 Excavator Kawasaki Type Piston Pump 31N8-10010 31N8-10011
Function
The hydraulic main pump is an essential power component of excavator hydraulic systems. Driven by the prime engine, it converts mechanical energy into high-pressure hydraulic energy, and transports pressurized medium to hydraulic motors to drive boom, arm, bucket, traveling and slewing movements.
Type
Axial variable displacement piston pumps are the mainstream for construction excavators. Medium and large excavators use integrated double main pumps equipped with a rear pilot gear pump.
The twin high-pressure pumps adopt individual oil supply passages, feeding oil to different ports of the main control valve for compound actions, with working pressure 28~35MPa.
The low-pressure pilot pump installed at the pump rear works at 3~4MPa with low flow, supplying pilot control oil for operating handles and main valve spools.
The twin high-pressure pumps adopt individual oil supply passages, feeding oil to different ports of the main control valve for compound actions, with working pressure 28~35MPa.
The low-pressure pilot pump installed at the pump rear works at 3~4MPa with low flow, supplying pilot control oil for operating handles and main valve spools.
Internal Parts
The housing and cylinder block hold several piston assemblies. They rotate together with the main shaft to complete oil suction and pressure generation.
Adjusting the swash plate inclination can change piston stroke and pump volumetric displacement.
The external servo regulator drives the swash plate according to hydraulic feedback. Larger angle increases flow rate and operation speed; smaller angle reduces fuel consumption and prevents engine stall.
The valve plate separates low-pressure inlet and high-pressure outlet to realize fluid distribution.
Adjusting the swash plate inclination can change piston stroke and pump volumetric displacement.
The external servo regulator drives the swash plate according to hydraulic feedback. Larger angle increases flow rate and operation speed; smaller angle reduces fuel consumption and prevents engine stall.
The valve plate separates low-pressure inlet and high-pressure outlet to realize fluid distribution.
Three Control Modes
Constant power regulation reduces pump displacement automatically as load increases, protecting the engine and achieving maximum power utilization.
The LS load sensing system delivers flow on demand and keeps low displacement at idle to cut fuel cost.
The HP pressure limiting function lowers pump displacement at peak system pressure to protect hydraulic pipelines and cylinders from rupture.
The LS load sensing system delivers flow on demand and keeps low displacement at idle to cut fuel cost.
The HP pressure limiting function lowers pump displacement at peak system pressure to protect hydraulic pipelines and cylinders from rupture.
Common Failures
Worn pistons, damaged valve plates or clogged regulators cause internal leakage, which results in slow operation and power shortage.
A locked regulator at maximum displacement will lead to engine overload, black exhaust and stall under heavy working conditions.
Severe internal leakage produces extra heat and triggers abnormal hydraulic oil temperature rise. Air entrainment, low oil level or defective parts will cause abnormal noise.
A locked regulator at maximum displacement will lead to engine overload, black exhaust and stall under heavy working conditions.
Severe internal leakage produces extra heat and triggers abnormal hydraulic oil temperature rise. Air entrainment, low oil level or defective parts will cause abnormal noise.
Maintenance
Replace hydraulic oil and filters on a regular basis to prevent abrasive damage to precision components. Ensure suction pipelines are tightly sealed to avoid air intake and equipment vibration. Keep hydraulic fluid at the standard level to prevent pump failure.
|
Machinery Test Report
|
Provided |
Warranty
|
3 Months |
|
Video outgoing-inspection
|
Provided | Brand Name |
OEM
|
|
Place of Origin
|
China | Product Name |
Hydraulic Pump
|
|
Model
|
K3V140DTP-9T1L | MOQ |
1 Piece
|
| Quality |
High-Quality
|
Delivery time
|
7-15 Days
|
|
Standard or Nonstandard
|
Standard
|
Application
|
Excavator Machinery
|
|
Size
|
Standard Size
|
Color | Grey |
Comapny peofile
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Lanzhou Fudong Guangqi Trading Co., Ltd
Location
No. 7 West South Binhe Road, Xigu District, Lanzhou City, Gansu Province, China
Contact Person
Liang