Linkbelt 3900Q Quantum Excavator Service Repair Manual

Table of Contents

1. Explanation

• Contents
• Safety
• Introduction
• Precautions
• Standard Torque Specifications
• Numerical Value Conversion Table

2. Specifications

• Major Equipment Specifications
  • Lower Mechanism
    • General View Lower Assembly Drawing
    • Travel Equipment
    • Take-up
    • Upper Roller
    • Lower Roller
    • Recoil Spring
    • Shoe
  • Upper Mechanism
    • Swing Equipment
  • Engine
    • Engine
    • Radiator
    • Engine Control
    • Fuel Tank
  • Hydraulic Pump
    • Hydraulic Pump
    • Sump Tank
    • Rotating Joint
  • Controls
    • Remote Control Valve
    • By-pass Oil Filter
    • Excavator Attachment
  • Filters, Fluids and Lubricants
• Performance
  • Main Body Weight
  • Lifting Capacities

3. Main Body Disassembly and Servicing Procedures

• Lower Mechanism
  • Travel Equipment
  • Drive Sprocket
  • Take-up Roller
  • Upper Roller
  • Lower Roller
  • Recoil Spring Disassembly and Assembly
  • Recoil Spring
  • Grease Cylinder
  • Track Shoe
  • Rotating Joint
• Attachment
  • Bucket Cylind er
  • Arm Cylinder
  • Boom Cylinder
• Maintenance Standards

4. Major Components Disassembly and Servicing Procedures

• Tightening Torque for Major Parts
• Take-up Roller
• Upper Roller
• Lower Roller
• Recoil Spring
• Rotating Joint

5. Major Hydraulic Components Disassembly and Servicing Procedures

• Hydraulic Pump
  • Instruction of Hydraulic Pump
  • Maintenance of Hydraulic Pump
  • Instruction of Regulator
  • Maintenance of Regulator
• Travel Mechanism
  • Motor Assembly
  • S/A; Motor
  • S/A; Reduction Gear
• Swing Mechanism
  • Motor Assembly
  • S/A; Motor
  • S/A; Reduction Gear
• Control Valve
• Hydraulic Cylinder
  • Specification and Structure
  • Maintenance of Cylinder
• Remote Control Valve
• Valve (8-spool Solenoid Valve)
• Valve (Shuttle Valve)
• Valve (Cushion Valve)
• Valve (Stack Valve)