Editorial Technical Reference

Hydraulic Crane

This page explains how Hydraulic Crane is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A lifting device that uses hydraulic systems to generate force for hoisting and moving heavy loads.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Hydraulic Crane

Definition
A hydraulic crane is a mechanical lifting device that employs hydraulic cylinders and fluid power to create substantial force for lifting, lowering, and transporting heavy materials. It consists of a boom, hydraulic system, outriggers, and control mechanisms, designed for construction, manufacturing, logistics, and industrial applications where precise load handling is required. The crane's structure is typically fabricated from high-strength steel and alloy steel, providing the necessary strength and durability for demanding environments. Key parameters include a maximum lifting capacity ranging from 5 to 50 metric tons, a maximum boom length from 10 to 40 meters, and a maximum working radius from 8 to 30 meters. The hydraulic system operates at a pressure of 20 to 35 bar, and the engine power ranges from 100 to 300 kilowatts. The maximum lifting height at full boom extension is 10 to 35 meters, with hoisting speeds from 0.5 to 2.5 meters per minute and slewing speeds from 1 to 3 revolutions per minute. The crane is designed to operate in temperatures from -20°C to 50°C, and electrical enclosures are rated IP54 to IP65. The total weight without counterweight is 10 to 50 metric tons, with adjustable counterweights from 2 to 10 metric tons for stability. These specifications are reference ranges and must be verified for the specific model and application. Standards such as ISO 4301-1, ISO 3046-1, and IEC 60529 are referenced for procurement and verification, but do not imply certification or compliance of any particular product. Always confirm model-specific values and standards with the legal manufacturer or supplier.
Working Principle
Hydraulic cranes operate using Pascal's law, where pressure applied to an incompressible fluid in a closed system is transmitted equally in all directions. An engine-driven hydraulic pump pressurizes hydraulic fluid, which flows through control valves to hydraulic cylinders. The pressurized fluid extends the cylinders, creating mechanical force that lifts the boom and load. Control valves regulate fluid flow direction and pressure for precise movement, while relief valves prevent system overload.
Common Materials
High-strength steel, Alloy steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Maximum Lifting CapacityRequired5–50 metric tonsThe heaviest load the crane can safely lift under specified conditionsISO 4301-1
Maximum Boom LengthRequired10–40 metersFully extended length of the main boom from pivot point to tip
Maximum Working RadiusRequired8–30 metersMaximum horizontal distance from crane center to load hook at full extension
Hydraulic System PressureRequired20–35 barOperating pressure of the main hydraulic system
Engine PowerRequired100–300 kilowattsPower output of the crane's engine or motorISO 3046-1
Maximum Lifting Height10–35 mAt maximum boom length
Hoisting Speed0.5–2.5 m/minNo-load to full-load
Slewing Speed1–3 r/min360° continuous rotation
Operating Temperature Range-20–50 °CBelow -20°C hydraulic oil thickens
Ingress Protection RatingIP54–IP65For electrical enclosuresIEC 60529
Total Weight10–50 tWithout counterweight
Counterweight2–10 tAdjustable for stability

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Hydraulic Boom
    Extendable arm that provides reach and elevation for lifting operations
    Material: High-strength steel with telescoping sections
  • Hydraulic Cylinders
    Convert hydraulic pressure into linear mechanical force to extend/retract boom and lift loads
    Material: Steel with chrome-plated rods and seals
  • Hydraulic Pump
    Generates hydraulic pressure by converting mechanical energy from the engine into fluid flow
    Material: Cast iron or aluminum housing with steel gears/vanes
  • Control Valves
    Regulate direction, flow rate, and pressure of hydraulic fluid to control crane movements
    Material: Steel or brass bodies with internal spools and seals
  • Outriggers
    Extendable supports that provide stability by distributing crane weight and load forces
    Material: High-strength steel beams with hydraulic extension
  • Hook Block
    Assembly containing the load hook and sheaves for wire rope routing and load attachment
    Material: Forged steel hook with alloy steel sheaves
  • Operator Cabin
    Enclosed space with controls, displays, and seating for crane operation
    Material: Steel frame with safety glass and ergonomic controls
  • Engine
    Drives the hydraulic pump that feeds the whole circuit.
  • Relief Valves
    Cap system pressure and dump flow before overload.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Hydraulic Crane.

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 350 bar (system dependent)
flow rate: 10-300 L/min (pump dependent)
temperature: -20°C to +80°C
slurry concentration: Not applicable (hydraulic oil only)
Media Compatibility
✓ Hydraulic oil (ISO VG 32-68) ✓ Water-glycol fluids (fire-resistant) ✓ Synthetic ester fluids (biodegradable)
Unsuitable: Saltwater/marine environments (corrosive to hydraulic components)
Sizing Data Required
  • Maximum load capacity (tons)
  • Required lifting height/reach (meters)
  • Operating duty cycle (intermittent/continuous)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Hydraulic Cylinder Seal Failure
Cause: Contamination from dirt or metal particles in hydraulic fluid, improper seal installation, or excessive pressure/temperature causing seal degradation
Hydraulic Pump Cavitation
Cause: Insufficient fluid supply, clogged inlet filters, excessive pump speed, or fluid viscosity issues leading to vapor bubble formation and implosion damage
Maintenance Indicators
  • Unusual knocking or whining noises from hydraulic pump during operation
  • Visible hydraulic fluid leaks at cylinder seals, hose connections, or valve assemblies
Engineering Tips
  • Implement strict hydraulic fluid contamination control with regular sampling and filtration maintenance
  • Establish preventive maintenance schedule for hydraulic component inspections and pressure testing before visible failure occurs

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 4309:2017 - Cranes - Wire ropes - Care, maintenance, installation, examination and discard ANSI/ASME B30.5 - Mobile and Locomotive Cranes DIN EN 13001-2 - Crane safety - General design - Part 2: Load actions

Quoted from the published standard.

Manufacturing Precision
  • Cylinder bore diameter: +/-0.025mm
  • Mounting surface flatness: 0.15mm per meter
Quality Inspection
  • Pressure test: 1.5 times maximum working pressure for 30 minutes
  • Non-destructive testing (NDT): Magnetic particle inspection of critical welds

Manufacturers of Hydraulic Crane

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Jiangsu OUCO Heavy Industry and Technology Co.,Ltd.
Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
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Manufacturing capability
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Inspection readiness
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Supplier transparency
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Frequently Asked Questions

What is the maximum lifting capacity of a hydraulic crane?

According to the reference data, the maximum lifting capacity ranges from 5 to 50 metric tons, depending on the model and configuration. Always check the specific crane's load chart and verify with the manufacturer.

What standards apply to hydraulic cranes?

Relevant standards include ISO 4301-1 for lifting capacity classification, ISO 3046-1 for engine power, and IEC 60529 for ingress protection. These are reference standards; actual compliance must be confirmed with the supplier.

How does the hydraulic system work in a crane?

The hydraulic system uses Pascal's law. A pump pressurizes fluid, which is directed by control valves to cylinders. The pressure extends the cylinders, generating force to lift the boom and load. Relief valves prevent overpressure.

What are the operating temperature limits?

The operating temperature range is -20°C to 50°C. Below -20°C, hydraulic oil thickens, which may affect performance. Always follow manufacturer guidelines for extreme conditions.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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