K3V112DT-1E42 Hydraulic Pump K3V112DT-1E42 Excavator 14603650 14595621 for EC220D
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
7-15days
Product Description
K3V112DT-1E42 Hydraulic Main Pump Excavator Parts Digger Spare Construction Machinery Parts
Function
The main hydraulic pump is the central power part of an excavator’s hydraulic circuit. It receives power from the engine, turns mechanical energy into high-pressure hydraulic energy, and sends pressurized medium to hydraulic motors to drive all boom, stick, bucket, travel and swing movements.
Type
Engineering excavators commonly use axial variable displacement piston pumps. Medium and large tonnage machines are fitted with integrated dual main pumps and a rear pilot gear pump.
These two high-pressure pumps have separate oil supply paths, feeding the main control valve to achieve combined working actions, with working pressure between 28MPa and 35MPa.
The low-pressure pilot pump mounted on the pump tail runs at 3~4MPa with low flow rate, providing pilot oil for operating handles and main valve spools.
These two high-pressure pumps have separate oil supply paths, feeding the main control valve to achieve combined working actions, with working pressure between 28MPa and 35MPa.
The low-pressure pilot pump mounted on the pump tail runs at 3~4MPa with low flow rate, providing pilot oil for operating handles and main valve spools.
Internal Parts
Multiple piston groups inside the housing and cylinder block rotate with the main shaft to finish oil suction and pressure build-up.
The swash plate adjusts its tilt angle to change piston stroke and pump displacement.
The external servo regulator actuates the swash plate according to hydraulic feedback signals. A larger angle increases flow and speed; a smaller angle lowers fuel use and prevents engine stall.
The valve plate separates low-pressure inlet and high-pressure outlet to distribute hydraulic fluid.
The swash plate adjusts its tilt angle to change piston stroke and pump displacement.
The external servo regulator actuates the swash plate according to hydraulic feedback signals. A larger angle increases flow and speed; a smaller angle lowers fuel use and prevents engine stall.
The valve plate separates low-pressure inlet and high-pressure outlet to distribute hydraulic fluid.
Three Control Modes
Constant power regulation reduces pump displacement when load increases, protecting the engine and making full use of power.
The LS load sensing system supplies flow as needed and maintains low displacement at idle to save fuel.
The HP pressure limiting function minimizes pump displacement at maximum pressure to protect hydraulic pipelines and cylinders.
The LS load sensing system supplies flow as needed and maintains low displacement at idle to save fuel.
The HP pressure limiting function minimizes pump displacement at maximum pressure to protect hydraulic pipelines and cylinders.
Common Failures
Worn pistons, faulty valve plates or blocked regulators lead to internal leakage, causing slow operation and insufficient power.
If the regulator is locked at maximum displacement, the engine will overload, produce black smoke and stall under heavy loads.
Too much internal leakage converts pressure loss into heat, resulting in abnormal hydraulic oil temperature rise. Air, low oil or damaged parts will cause abnormal noise.
If the regulator is locked at maximum displacement, the engine will overload, produce black smoke and stall under heavy loads.
Too much internal leakage converts pressure loss into heat, resulting in abnormal hydraulic oil temperature rise. Air, low oil or damaged parts will cause abnormal noise.
Maintenance
Periodically replace hydraulic oil and filter elements to avoid abrasive damage to precision parts. Keep suction pipelines tightly sealed to prevent air intake and vibration. Maintain hydraulic fluid at standard level.
|
Machinery Test Report
|
Provided |
Warranty
|
3 Months |
|
Video outgoing-inspection
|
Provided | Brand Name |
OEM
|
|
Place of Origin
|
China | Product Name |
Hydraulic Pump
|
|
Model
|
K3V112DT-1E42 | MOQ |
1 Piece
|
| Quality |
High-Quality
|
Delivery time
|
7-15 Days
|
|
Standard or Nonstandard
|
Standard
|
Application
|
Excavator Machinery
|
|
Size
|
Standard Size
|
Color |
Black |
Company Profile
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