K3V140DT-9ND9 Hydraulic Pump Excavator Construction Machinery Parts XE335C Piston Pump Parts
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
7-15days
Product Description
K3V140DT-9ND9 Hydraulic Pump Excavator Construction Machinery Parts XE335C Piston Pump Parts
Function
As the prime power source of excavator hydraulic circuits, main hydraulic pump is driven by prime engine, converting rotational mechanical energy into high-pressure hydraulic power. It conveys pressurized fluid to boom, stick, bucket, travel and slew drive motors to implement all excavation movements.
Type
Axial variable piston pump is the mainstream configuration for engineering diggers; medium & large tonnage machines adopt integrated twin main pump with built-in rear pilot gear pump.
Dual main pump operates at 28~35MPa with two independent oil outlets feeding main control valve separately for compound action. Rear pilot gear pump runs at 3~4MPa low pressure to supply pilot control oil for operating levers and valve spools.
Dual main pump operates at 28~35MPa with two independent oil outlets feeding main control valve separately for compound action. Rear pilot gear pump runs at 3~4MPa low pressure to supply pilot control oil for operating levers and valve spools.
Internal Construction
Pump housing and cylinder block assemble multiple piston assemblies, completing oil intake and pressurization synchronously with main shaft rotation. Swash plate tilt angle modifies piston stroke and pump displacement. Side-mounted servo regulator adjusts swash angle by hydraulic feedback: larger inclination boosts displacement & flow for quicker operation; smaller angle cuts delivery volume to save fuel and prevent engine shutdown under heavy load. Valve plate isolates low-pressure inlet chamber and high-pressure outlet for oil distribution.
Three Control Modules
Constant power regulation cuts pump displacement along with load increase to match engine output and avoid stall. LS load sensing outputs flow matching real system demand and maintains minimal displacement in idle for energy conservation. Pressure cutoff lowers displacement to bottom limit once pressure hits rated peak to guard pipelines and cylinders against bursting.
Common Defects
Abraded pistons or valve plate causing internal leakage or seized regulator leads to sluggish and underpowered machine movement. Regulator locked at full displacement triggers engine overload, excessive black smoke and choking. Serious inner leakage converts power loss into thermal energy and elevates hydraulic fluid temperature. Air suction, insufficient oil or damaged internal bearings and pistons result in abnormal knocking noise.
Maintenance
Replace hydraulic fluid and filter elements on scheduled cycle to avoid particle abrasion on precision components; keep suction pipeline fully sealed to prohibit air ingress and machine judder; sustain standard oil level to prevent irreversible pump damage.
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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
|
K3V140DT-9ND9 | MOQ |
1 Piece
|
| 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
|
Standard Size
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Color | Grey |
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