Editorial Technical Reference

Crawler Excavator

This page explains how Crawler Excavator 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 heavy construction machine with a tracked undercarriage, used for digging, trenching, and material handling.

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

Product Specifications

Technical details and manufacturing context for Crawler Excavator

Definition
A crawler excavator is a self-propelled, tracked heavy equipment vehicle designed for earthmoving, excavation, and material handling tasks. It consists of a rotating superstructure mounted on a crawler undercarriage, featuring a boom, stick, and bucket attachment operated by hydraulic cylinders. The tracked design provides superior stability and traction on uneven or soft terrain compared to wheeled excavators, making it ideal for construction, mining, demolition, and infrastructure projects. Typical specifications for this class include an operating weight of 20–40 tons, engine power of 110–250 kW (ISO 9249), bucket capacity of 0.8–1.6 m³ (ISO 7451), maximum digging depth of 6–8 m (ISO 6015), and maximum digging reach of 9–11 m (ISO 6015). Track width ranges from 500–800 mm, and ground pressure is 40–80 kPa. Hydraulic system operates at 1.0–1.6 MPa with a flow rate of 200–400 L/min. Swing speed is 8–12 r/min, gradeability is 35–70% (ISO 6015), and operating temperature range is -20 to 50°C. Materials commonly used include high-strength steel, cast iron, and rubber tracks. These values are reference ranges; actual specifications must be confirmed with the legal manufacturer or supplier for the specific model and application. The machine is typically powered by a diesel engine, and its hydraulic system enables precise control. For procurement, verify model-specific parameters and applicable standards with the manufacturer.
Working Principle
The excavator's diesel engine powers hydraulic pumps that generate high-pressure fluid flow to actuate hydraulic cylinders and motors. These control the movement of the undercarriage tracks, the 360-degree rotation of the superstructure (via a swing motor), and the articulation of the boom, stick, and bucket. Operator inputs from joysticks in the cab regulate valve blocks to direct hydraulic flow, enabling precise digging, lifting, and material placement. The hydraulic system operates at a pressure of 1.0–1.6 MPa and a flow rate of 200–400 L/min, providing the force and speed needed for various tasks. The tracked undercarriage distributes weight to achieve ground pressure of 40–80 kPa, ensuring stability on soft ground. The swing speed of 8–12 r/min allows efficient cycle times. Gradeability of 35–70% enables operation on slopes. The operating temperature range of -20 to 50°C defines the environmental limits for normal operation. Regular maintenance of hydraulic fluid, filters, and seals is essential to prevent leaks and maintain performance. Monitoring hydraulic pressure and flow can indicate system health; deviations may signal wear or blockages.
Common Materials
High-strength steel, Cast iron, Rubber tracks
Technical Parameters
ParameterTypical rangeNotes & selection driver
Operating WeightRequired20–40 tonTotal weight of the excavator including standard equipment and fluids
Engine PowerRequired110–250 kWRated power output of the diesel engineISO 9249
Bucket CapacityRequired0.8–1.6 Volume capacity of the standard digging bucketISO 7451
Max Digging DepthRequired6–8 mMaximum vertical digging depth from ground levelISO 6015
Track Width500–800 mmWidth of individual crawler tracks
Swing Speed8–12 r/minHigher speed improves cycle time
Max Digging Reach9–11 mMeasured from swing centerISO 6015
Ground Pressure40–80 kPaLower pressure for soft ground
Hydraulic Flow Rate200–400 L/minMain pump flow at rated speed
Gradeability35–70 %Maximum gradient for travelISO 6015
Operating Temperature Range-20–50 °COutside range may require special fluids

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
  • Undercarriage
    Provides mobility and stability via tracked propulsion system
    Material: High-strength steel with rubber track pads
  • Swing Bearing
    Enables 360-degree rotation of the superstructure
    Material: Alloy steel with hardened raceways
  • Boom
    Main structural arm that supports the stick and bucket
    Material: High-tensile steel
  • Stick Part
    Intermediate arm connecting boom to bucket for reach adjustment
    Material: High-tensile steel
  • Bucket
    Digging attachment for excavating and handling materials
    Material: Abrasion-resistant steel with replaceable teeth
  • Hydraulic System
    Provides power transmission through fluid pressure to actuate all movements
    Material: Steel pipes, hydraulic hoses, alloy pumps and valves
  • Operator Cab
    Enclosed compartment with controls, seating, and safety features for the operator
    Material: Steel frame with safety glass, ergonomic seating
  • Diesel Engine
    Prime mover; drives the hydraulic pumps that feed every function.
  • Swing Motor
    Turns the superstructure on the swing bearing.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Crawler Excavator.

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Hydraulic system: 350 bar max
flow rate: Hydraulic pump: 200-400 L/min
temperature: -20°C to 50°C
slurry concentration: Not applicable (solid material handling only)
Media Compatibility
✓ soil and earth excavation ✓ rock and aggregate handling ✓ demolition debris
Unsuitable: underwater or submerged operations
Sizing Data Required
  • maximum digging depth (m)
  • bucket capacity (m³)
  • operating weight requirement (tons)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Track link and bushing wear
Cause: Abrasive wear from soil and debris ingress, compounded by inadequate lubrication and high tension loads during operation.
Hydraulic cylinder seal failure
Cause: Contamination of hydraulic fluid with particulates, leading to scoring of cylinder rods and degradation of seals, often due to poor filtration maintenance.
Maintenance Indicators
  • Excessive track sag or visible misalignment indicating worn components or improper tension.
  • Unusual hydraulic system noises (e.g., whining, knocking) or visible fluid leaks around cylinders and hoses.
Engineering Tips
  • Implement a strict track tension and lubrication schedule, adjusting for operating conditions to minimize abrasive wear and extend undercarriage life.
  • Use high-quality hydraulic filters and perform regular fluid analysis to detect contamination early, preventing seal and component degradation.

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 6165:2012 - Earth-moving machinery - Basic types - Vocabulary ANSI/SAE J1163 - Operation and Maintenance of Crawler Mounted Excavators

Quoted from the published standard.

Manufacturing Precision
  • Hydraulic cylinder bore: +/-0.025mm
  • Track link pin hole alignment: 0.15mm flatness
Quality Inspection
  • Non-Destructive Testing (NDT) - Magnetic Particle Inspection for critical welds
  • Functional test - Hydraulic system pressure and cycle testing

Manufacturers of Crawler Excavator

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

Saintyol DAWIN Machinery
Shandong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
SINOMACH
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
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
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Frequently Asked Questions

What are the typical operating weight and engine power of a crawler excavator?

For this class of crawler excavator, the operating weight typically ranges from 20 to 40 tons, and the engine power is between 110 and 250 kW (measured per ISO 9249). These are reference ranges; the exact values depend on the specific model and configuration. Always confirm with the manufacturer or supplier.

What is the maximum digging depth and reach?

The maximum digging depth is typically 6 to 8 meters, and the maximum digging reach is 9 to 11 meters, both measured per ISO 6015. These values are indicative for this size class and may vary with the attachment and setup. Verify with the manufacturer for the intended application.

What hydraulic pressure and flow rate does the system use?

The hydraulic system operates at a pressure of 1.0 to 1.6 MPa and a flow rate of 200 to 400 L/min. These parameters influence the digging force and speed. Confirm the exact values for the specific model, as they affect performance and compatibility with attachments.

What are the operating temperature limits?

The recommended operating temperature range is -20°C to 50°C. Outside this range, special fluids or modifications may be required. Always consult the manufacturer's guidelines for operation in extreme conditions to ensure reliability and safety.

Data Basis

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

Preliminary Technical Classification
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