K3V63DT-HNOE Hydraulic Main Pump DH150-7 Excavator Replacement Pump Compatible K3V63DT Series Construction Machinery Parts
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
7-15days
Product Description
K3V63DT-HNOE Hydraulic Main Pump DH150-7 Excavator Replacement Pump Compatible K3V63DT Series Construction Machinery Parts
Function
The main hydraulic pump serves as the central power component for excavator hydraulic circuits. Powered by the engine, it converts mechanical energy into high-pressure hydraulic energy and delivers pressurized fluid to hydraulic motors to actuate all working movements of the excavator.
Type
Engineering excavators are mostly equipped with axial variable displacement piston pumps. Medium and large machines adopt integrated twin main pumps together with a rear pilot gear pump unit.
Two independent high-pressure oil supply lines feed the main control valve to realize compound movements, with nominal working pressure 28~35MPa.
The tail-mounted low-pressure pilot pump operates at 3~4MPa with low flow output, supplying pilot pressure oil for control levers and main valve spools.
Two independent high-pressure oil supply lines feed the main control valve to realize compound movements, with nominal working pressure 28~35MPa.
The tail-mounted low-pressure pilot pump operates at 3~4MPa with low flow output, supplying pilot pressure oil for control levers and main valve spools.
Internal Parts
Piston assemblies installed inside cylinder block and pump casing rotate along with main shaft to finish oil suction and pressure building process.
Swash plate inclination angle adjustment modifies piston stroke, which changes pump displacement value.
External servo regulator drives swash plate responding to hydraulic feedback. Larger tilt angle increases flow rate and operation speed; smaller tilt angle reduces fuel consumption and prevents engine stalling issue.
The valve plate divides low-pressure inlet and high-pressure outlet passages to complete hydraulic oil distribution.
Swash plate inclination angle adjustment modifies piston stroke, which changes pump displacement value.
External servo regulator drives swash plate responding to hydraulic feedback. Larger tilt angle increases flow rate and operation speed; smaller tilt angle reduces fuel consumption and prevents engine stalling issue.
The valve plate divides low-pressure inlet and high-pressure outlet passages to complete hydraulic oil distribution.
Three Control Modes
Constant power control reduces pump displacement automatically when load rises, protecting engine and improving overall power utilization rate.
The LS load-sensing system supplies flow on demand and maintains low displacement at idle to achieve fuel-saving effect.
HP pressure limiting function decreases pump displacement when pressure hits peak value, protecting hydraulic pipelines and cylinders from rupture damage.
The LS load-sensing system supplies flow on demand and maintains low displacement at idle to achieve fuel-saving effect.
HP pressure limiting function decreases pump displacement when pressure hits peak value, protecting hydraulic pipelines and cylinders from rupture damage.
Common Failures
Worn pistons, damaged valve plates or blocked regulators produce internal leakage, leading to slow operation and power shortage.
When regulator is locked at maximum displacement, engine will overload, discharge black smoke and stall under heavy working loads.
Too much internal leakage converts pressure loss into heat, causing hydraulic oil temperature to rise abnormally.
Air intake, insufficient oil level or damaged bearings and pistons will trigger abnormal operating noise.
When regulator is locked at maximum displacement, engine will overload, discharge black smoke and stall under heavy working loads.
Too much internal leakage converts pressure loss into heat, causing hydraulic oil temperature to rise abnormally.
Air intake, insufficient oil level or damaged bearings and pistons will trigger abnormal operating noise.
Maintenance
Replace hydraulic oil and filters regularly to avoid abrasion on precision internal parts. Guarantee tight sealing of suction pipes to prevent air suction and machine vibration. Keep hydraulic fluid at specified level to ensure stable pump performance.
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