Develon DX380LC-7K Crawler Excavator Shop Manual (950106-02643_C_EN)

Out on sites, this DX380LC-7K usually lives in rock, mud, demo rubble, and tight production schedules. This shop manual’s what you use when you’re past quick fixes and you’re ready to tear in deep without guessing. It walks you through planning the teardown, where to stop and inspect, and how to put it all back so you don’t chase the same fault next week. Say you’ve got swing noise and metal in the oil: with this, you’ll trace the problem, strip the swing gear train in order, inspect the bearings and shims, then reassemble and torque in sequence so backlash stays where it should.

Applications & Use Cases

• Plan a major boom/stick teardown: lay out parts, route hoses correctly, and mark pins so you can align everything clean on reassembly.
• Strip and rebuild final drives, checking gear wear patterns, isolating bad bearings, then torquing the case in the right cross pattern.
• Verify hydraulic pump work: test, remove, inspect coupling and shims, then bleed and re-time the system so it doesn’t cavitate on startup.
• Check and reset undercarriage components, inspect rollers and idlers, align track frames, and verify tension after you button it up.
• Diagnose weird swing or travel issues by following step‑by‑step checks that narrow it down before you start buying parts.

FAQ

Q: Is this a PDF I can search on my laptop or tablet?

A: Yes, it’s typically a searchable PDF, so you can jump to systems or terms instead of scrolling forever.

Q: Can I print just the sections I need to take out to the machine?

A: You usually can; most techs print the key procedures and wiring or hose diagrams so they don’t trash a whole manual in the mud.

Safety Note

Always support raised components with rated stands or blocking before you get under them, even if the hydraulics seem to be holding fine.

Develon DX380LC-7K Crawler Excavator Index:

• DX380LC-7K
  • Safety, Specification and Systems Operation
    • Track Excavator Maintenance Safety
      • Safety Instructions
      • Safety Messages
      • General
      • Long Term Storage
      • Maintenance
      • Environment and Circumstances
    • General Specifications
      • Safety Instructions
      • General
      • Standard Specification
      • Performance Tests
      • Preparation for Performance Tests
      • Operational Performance Standard Table
      • Operational Performance Test
    • Engine Specifications
      • Safety Instructions
      • Engine Specification
      • Engine Performance Curves
      • Tightening Torques
    • Hydraulic Systems and Structure Specifications
      • Safety Instructions
    • General Maintenance Instructions
      • Safety Instructions
      • Welding Precautions and Instructions
      • Hydraulic System – General Precautions
      • Maintenance Service and Repair Procedure
      • Hydraulic System Cleanliness and Oil Leaks
      • Cleaning and Inspection
    • Standard Torques
      • Safety Instructions
      • Torque Values for Standard Metric Fasteners
      • Torque Values for Standard U.S. Fasteners
      • Type 8 Phosphate Coated Hardware
      • Torque Values for Hose Clamps
      • ORFS Swivel Nut Recommended Torque
      • Torque Values for Split Flanges
      • Torque Wrench Extension Tools
      • Loctite Applications
    • Engine
      • Safety Instructions
      • General Information
      • Mechanical System
      • Fuel System
      • Lubricating System
      • Cooling System
      • Intake and Exhaust System
      • Engine Control and Electrical System
      • After Treatment System
    • Systems Operation, Description and Inspection
      • Safety Instructions
      • General
      • Hydraulic Schematic
      • Hydraulic Component
    • Components Operation, Description and Inspection
      • Safety Instructions
      • Main Pump
      • Main Control Valve
      • Swing Device
      • Fan Pump
      • Fan Motor
      • Joystick Valve
      • Travel Control Valve
      • EPPR Valve (By Pass Cut Valve)
      • EPPR and Solenoid Valve (Travel/Swing Operation)
      • Boom Floating Valve
      • Center Joint
      • Travel Device
      • Cylinder
    • Systems Operation and Description
      • Safety Instructions
      • General Schematics
      • Power Supply
      • Starting System
      • Charging System
      • AVM System
      • EPOS system
      • Gauge Panel System
      • Air Conditioner System
      • Refrigerant System Repairs
      • Troubleshooting
  • Removal and Installation
    • Engine
      • Safety Instructions
      • Before Removing and Installing
      • ECU (Engine Control Unit)
      • V-Belt
      • Alternator
      • Starter Motor
    • Hydraulic Systems and Structure
      • Safety Instructions
      • Before Removing and Installing
      • Drive Coupling
      • Undercovers
      • Joystick Valve(Work Lever)
      • Travel Control Valve
      • Main Control Valve
      • Main Pump
      • Hydraulic Oil Tank
      • Fuel Tank
      • Swing Device
      • Fan Pump
      • Fan Motor
      • Center Joint
      • Track Guard
      • Travel Device
      • Cabin
      • Air Condenser Filter
    • Electric and Electronic
      • Safety Instructions
      • Before Removing and Installing
      • Battery Assembly
      • EPOS Controller
      • TMS Controller
      • AVM Controller
      • Microphone Controller
      • Smart Key Controller
      • DC-DC Controller
      • Cabin Photo Sensor
      • Cabin Switches
      • Around View Monitor
      • Display Monitor
      • Hour Meter
      • Wiper Motor
  • Troubleshooting Guide
    • Wiring Harness Layout
      • Safety Instructions
      • Wiring Device
    • Error Code
      • Safety Instructions
      • 1. Engine Fault Code List
      • EPOS Error Code
  • Schematics
    • DX380LC-7 Hydraulic Schematic
    • DX380LC-7 Electric Schematic
    • Main Harness

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