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K3V63DT-9POH Hydraulic Pump K3V63DT Steel Main Pump for SY135 Construction Excavator Parts

K3V63DT hydraulic pump

steel main pump for excavator

SY135 excavator hydraulic parts

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K3V63DT hydraulic pump

steel main pump for excavator

SY135 excavator hydraulic parts

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Product Description

K3V63DT-9POH Hydraulic Pump K3V63DT Steel Main Pump for SY135 Construction Excavator Parts

Function

Being the core power element of excavator hydraulic systems, the hydraulic main pump is driven by the engine. It realizes conversion of mechanical energy into high-pressure hydraulic energy and transmits pressurized medium to each hydraulic motor to drive boom, stick, bucket, travel and swing functions.

Type

Axial variable piston pumps are widely adopted on construction excavators. Medium and large tonnage excavators use integrated dual main pumps matched with a rear pilot gear pump.
The dual high-pressure pumps adopt separate oil supply routes, feeding oil to main control valve ports to realize coordinated composite actions, working pressure range: 28~35MPa.
The low-pressure pilot pump fixed at pump tail runs at 3~4MPa with low flow volume, providing pilot control oil for operation handles and main valve spools.

Internal Parts

The housing and cylinder block contain multiple piston assemblies rotating synchronously with main shaft to finish oil suction and pressurization work.
Changing swash plate tilt angle adjusts piston stroke length and pump volumetric displacement.
External servo regulator actuates swash plate based on hydraulic feedback signals. Larger angle increases displacement and flow for faster operation; smaller angle lowers fuel consumption and prevents engine stall risk.
The valve plate separates low-pressure inlet and high-pressure outlet channels to complete fluid distribution work.

Three Control Modes

Constant power regulation automatically cuts pump displacement as load increases, protecting engine and making full use of output power.
The LS load-sensing system supplies flow according to actual working requirement and maintains low displacement at idle to reduce fuel consumption.
HP pressure limiting function reduces pump displacement at system peak pressure, protecting hydraulic pipes and cylinders from breakage damage.

Common Failures

Internal leakage induced by piston wear, valve plate damage or regulator clogging results in slow action speed and insufficient power output.
Regulator locked at maximum displacement position causes engine overload, black smoke emission and engine stall under heavy load conditions.
Excessive internal leakage converts pressure loss into heat energy, causing abnormal temperature rise of hydraulic oil.
Air mixing in hydraulic oil, insufficient fluid volume or damaged bearings and pistons generate abnormal running noise.

Maintenance

Carry out regular replacement of hydraulic oil and filter elements to prevent precision parts from abrasive damage. Ensure good sealing of suction pipelines to avoid air intake and equipment vibration. Keep hydraulic oil at standard level to prevent pump malfunction.

Machinery Test Report	Provided	Warranty	3 Months
Video outgoing-inspection	Provided	Brand Name	OEM
Place of Origin	China	Product Name	Hydraulic Pump
Model	K3V63DT-9POH	MOQ	1 Piece
Quality	High-Quality	Delivery time	7-15 Days
Standard or Nonstandard	Standard	Application	Excavator Machinery
Size	Standard Size	Color	Red

K3V63DT-9POH Hydraulic Pump K3V63DT Steel Main Pump for SY135 Construction Excavator Parts 0 Company Profile

Tags：

K3V63DT-9POH Hydraulic Pump K3V63DT Steel Main Pump for SY135 Construction Excavator Parts

K3V63DT hydraulic pump

steel main pump for excavator

SY135 excavator hydraulic parts

K3V63DT hydraulic pump

steel main pump for excavator

SY135 excavator hydraulic parts

PVD-0B-16S 19020-21500 Hydraulic Main Pump For Takeuchi Excavator TB016 Excavator Hydraulic Parts

PVD Hydraulic Pump PVD-0B-24P-8G3 For KubotaU25-3 Hydraulic Pump RB511-61112 Excavator Construction Machinery Parts

Original E349 Fan Pump 524-0924524 Repair Kit New Excavator Spare Parts Replacement Seal Gasket Bearing Set

K5V140DTP-YT6K-17T LC10V00014F1 Hydraulic Pump SK350-8 Excavator Parts Main Pump Construction Machinery Pump Parts

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Maintenance

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