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+86 13802929623
+86 13802929623
Guangzhou Zhonghai Jiuchuan Machinery Equipment Co., Ltd. supplies excavator hydraulic parts for hydraulic power generation, oil-flow control, travel, swing, digging, lifting and attachment operation.
Our excavator hydraulic parts range includes main hydraulic pumps, swing motors, travel motors, final-drive assemblies, main control valves, hydraulic cylinders, pilot valves, solenoid valves, relief valves, center joints, accumulators, hydraulic hoses, fittings, seals, sensors and component repair kits.
Each component is matched according to the excavator model, machine serial number, hydraulic component nameplate, original part number, pressure and flow requirements, control method and connection dimensions.
The excavator engine drives one or more hydraulic pumps. The pumps draw oil from the hydraulic tank and create the flow required to operate the machine.
The main control valve directs this oil to different actuators, including:
Boom cylinders
Arm cylinders
Bucket cylinders
Swing motor
Left travel motor
Right travel motor
Dozer-blade cylinder
Boom-swing cylinder
Auxiliary attachments
The hydraulic pump primarily creates oil flow. Resistance to that flow produces pressure. Control valves regulate the direction, volume and priority of oil supplied to each function.
The complete system must work as a matched combination. Installing a pump, motor or valve with an incorrect displacement, pressure setting or control configuration can affect machine speed, digging force, controllability and hydraulic temperature.
| Application | Main Hydraulic Requirements | Product Focus |
|---|---|---|
| General Earthmoving | Balanced speed, digging force and reliability | Main pumps, control valves, cylinders and travel motors |
| Mining | High pressure, long operating hours and heavy loads | Main pumps, motors, cooling-related parts and repair packages |
| Quarrying | Shock loading, dust and abrasive contamination | Pump and motor protection, hoses, seals and filtration |
| Demolition | Rapid load changes and attachment operation | Auxiliary valves, high-pressure hoses, cylinders and control components |
| Forestry | Variable attachments and wet environments | Auxiliary hydraulics, hose protection, center joints and seals |
| Material Handling | Smooth, precise and repetitive movement | Control valves, swing components, cylinders and sensors |
| Road Construction | Frequent travel and grading movement | Travel motors, final drives, blade cylinders and pilot controls |
| Marine or Coastal Work | Moisture and corrosion exposure | Hoses, fittings, seals and protected electrical components |
| Cold-Climate Operation | Low-temperature oil flow and seal performance | Correct hydraulic oil, seals, pilot components and warm-up control |
| Hot-Climate Operation | High oil temperature and cooling demand | Pump efficiency, oil coolers, hoses, seals and filtration |
Hydraulic pumps, motors and valves contain precision surfaces and small control passages. Clean handling is therefore important during storage and installation.
Recommended workshop controls include:
Clean the external area before disassembly
Cap open hoses and ports immediately
Keep replacement parts in sealed packaging
Use clean hydraulic oil for assembly
Replace contaminated filters
Inspect the hydraulic tank for debris
Clean or replace affected hoses and coolers
Flush related circuits after major component failure
Avoid reusing visibly damaged seals
Confirm oil level before startup
Bleed air according to the machine procedure
Monitor pressure, temperature and noise after installation
When a pump or motor fails and releases metal particles, replacing only the failed component may allow retained debris to damage the new part.
Confirm:
Component model
Port positions
Shaft or coupling alignment
Mounting surfaces
Seal condition
Hose cleanliness
Hydraulic oil specification
Filter condition
Electrical voltage and connector
Rotation direction
Technicians should:
Keep ports capped until connection
Use the correct seals
Avoid forcing misaligned fittings
Follow the machine torque requirements
Pre-fill components where specified
Check case-drain routing
Confirm suction-line sealing
Avoid applying sealant inside hydraulic passages
The system should be checked for:
External leakage
Abnormal noise
Excessive temperature
Correct pressure
Correct actuator speed
Smooth control response
Stable travel and swing
Hydraulic oil level
Filter restriction
Diagnostic fault codes
Installation and adjustment should be completed according to the excavator service manual.
Guangzhou Zhonghai Jiuchuan implements the ISO 9001 quality-management system and applies inspection controls from incoming materials to shipment.
The machine information, component model, part number and order description are checked before production or order preparation.
Applicable incoming materials are checked according to product and manufacturing requirements.
Important dimensions may be monitored during machining, including:
Mounting surfaces
Shaft dimensions
Bore dimensions
Port threads
Seal grooves
Gear dimensions
Pin holes
Component clearances
Applicable shafts, gears and other wear-related components are monitored through the required heat-treatment process.
Depending on the component, assembly checks may cover:
Correct component combination
Fastener installation
Seal installation
Shaft movement
Port protection
Solenoid configuration
External completeness
Finished products are checked for:
Appearance
Dimensions
Part identification
Mounting configuration
Included accessories
Order quantity
Packaging condition
Batch-related samples and inspection records are retained for three years to support after-sales traceability and repeat orders.
Guangzhou Zhonghai Jiuchuan Machinery Equipment Co., Ltd. supplies excavator hydraulic parts for maintenance, component repair, machine overhaul and aftermarket distribution.
Our team helps customers identify the correct pump, motor, valve, cylinder or repair kit using machine information, component nameplates, original part numbers and connection dimensions.
Send us your excavator model, hydraulic component nameplate, part number and required quantity to receive a matched supply proposal.
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We Look Forward To Working With You.
