Cylinder Assembly for Hitachi ZX200–ZX890 Excavators | Genuine Hitachi
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Hitachi ZX200–ZX890 Excavator
Cylinder Assembly for Hitachi ZX200–ZX890 Excavators | Genuine Hitachi
Product Overview
The hydraulic cylinder assembly is a fundamental component of your Hitachi excavator's front attachment, converting hydraulic pressure into linear force to control boom raise/lower, arm in/out, and bucket curl/dump functions. These precision-engineered cylinders must withstand extreme loads, high pressures, and continuous operation in mining, quarry, and heavy construction environments.
This is a genuine Hitachi original equipment cylinder assembly, manufactured to exacting OEM specifications for perfect fit, reliable performance, and long service life across the entire ZX series range from 20-ton to 90-ton class machines.
Cylinder Types & Applications
Cylinder Type
Function
Typical Quantity
Boom Cylinder
Raises and lowers the boom assembly
2 per machine
Arm Cylinder
Extends and retracts the arm (dipper)
1 per machine
Bucket Cylinder
Curls and dumps the bucket
1 per machine
Track Adjuster Cylinder
Maintains proper track tension
2 per machine
Technical Specifications
Specifications vary by model. Below are reference ranges for the ZX200–ZX890 series:
Parameter
Boom Cylinder
Arm Cylinder
Bucket Cylinder
Cylinder Bore Diameter
120–170 mm
135–160 mm
115–150 mm
Rod Diameter
85–115 mm
95–120 mm
80–110 mm
Stroke Length
1250–1800 mm
1400–2000 mm
1000–1500 mm
Operating Pressure
34.3 MPa (standard)
34.3 MPa
34.3 MPa
Weight Range
170–450 kg
150–400 kg
120–350 kg
Please verify exact specifications for your specific model with our parts department.
Genuine Hitachi Quality
Component
Feature
Benefit
Cylinder Tube
Precision-honed seamless steel
Smooth bore surface extends seal life
Piston Rod
Induction-hardened, hard chrome-plated
Superior wear and corrosion resistance
Piston
High-strength ductile iron
Reliable force transmission
Seal Kit
Genuine Hitachi polyurethane/NBR
Leak-free operation in extreme conditions
Cylinder Head
High-tensile steel
Rigid support for rod and seals
Cushion Mechanism
Integrated cushioning (select models)
Reduced shock at stroke ends
Key Features
- Precision-machined components for minimal internal leakage
- Hard-chrome plated rods resist corrosion and scoring
- High-temperature seals maintain integrity under heavy loads
- Greaseable pivot points with genuine Hitachi bushings
- Factory pressure-tested before shipment
Compatible Hitachi Models
Series
Models Covered
ZX200 Series
ZX200-3, ZX200-5A, ZX200-5G, ZX200LC, ZX210, ZX210W-3, ZX225US
ZX300 Series
ZX300-5A, ZX330-3, ZX330-5A, ZX330-5G, ZX350-5A
ZX400 Series
ZX470-3, ZX470-5A, ZX470-5G, ZX490
ZX500+ Series
ZX520, ZX670, ZX850, ZX870-3, ZX890-5A
IMPORTANT: Cylinder configurations vary significantly by model year, serial number, and regional specifications. Please provide your machine serial number for exact compatibility confirmation.
Genuine Part Assurance
Assurance
Detail
Authenticity
100% genuine Hitachi part
Packaging
Original Hitachi industrial packaging
Warranty
Full Hitachi manufacturer's warranty
Documentation
Genuine parts certificate included
Traceability
Complete manufacturing records available
Installation Guidelines
Critical Requirements
- Verify part numbermatches your machine's requirements
- Prepare adequate lifting equipment- cylinders are heavy (170kg+ for ZX200 boom cylinder)
- Support attachments securelybefore pin removal
- Inspect pins and bushingsfor wear - replace if necessary
- Use new genuine Hitachi sealson all hydraulic connections
Installation Steps (Boom Cylinder Example)
- Position machine with attachment safely supported
- Disconnect hydraulic hoses, cap immediately to prevent contamination
- Attach nylon slings and hoist to support cylinder weight
- Remove nuts, bolts, and stopper from rod side
- Drive out pin using bar and hammer (use brass drift to protect components)
- Remove thrust plates and carefully lower cylinder
- Clean mounting surfaces thoroughly
- Install new cylinder in reverse order
- Torque all fasteners to Hitachi specifications
- Connect hydraulic lines using new seals
- Bleed air from cylinder by slow cycling
Weight Reference (ZX200-5G)
- Boom Cylinder:Approximately 170 kg
- Arm/Bucket Cylinder:Varies by model
IMPORTANT:Installation must only be performed by qualified technicians with proper lifting equipment. Metal fragments may fly when using hammers - wear appropriate PPE.
Maintenance Recommendations
Interval
Maintenance Task
Daily
Inspect rods for scoring, check for external leaks
Weekly
Grease cylinder pivot points
Every 500 hours
Check rod gland torque, inspect hoses
Every 2000 hours
Check cylinder drift, inspect bushings
As Needed
Replace seals at first sign of leakage
Critical Maintenance Notes
- Always use genuine Hitachi seal kits for repairs
- Protect chrome rods from weld spatter and impacts
- Address any drift or leakage immediately to prevent internal damage
- Keep pivot points properly lubricated
Ordering Information
Product:Hydraulic Cylinder Assembly (Genuine Hitachi)
Application:Hitachi ZX200–ZX890 Series Excavators
Condition:New Genuine OEM Part
Packaging:Original Hitachi industrial packaging
Available Cylinder Types
- Boom Cylinder- Left and Right (specify position)
- Arm Cylinder
- Bucket Cylinder
- Track Adjuster Cylinder
Technical Support
Our parts specialists can assist with:
- Compatibility verification using your machine serial number
- Cylinder identification (boom, arm, bucket, track adjuster)
- Left/right side confirmation
- Installation guidance
- Seal kit cross-referencing
Please have your machine serial number ready when contacting us.
Hitachi is a registered trademark of Hitachi Construction Machinery. All genuine parts are sourced through authorized distribution channels.
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