Develon DX380LC-7 Crawler Excavator Shop Manual (950106-02126_C_EN)

Out on big earthmoving sites, quarries, or demo jobs, the DX380LC-7 is working hard in dust, mud, and bad weather, so when it’s time to tear it down you want a clear game plan, not guesswork. This shop manual helps you plan major teardowns, trace faults through systems, and then reassemble everything so it’ll start, swing, and dig like it should. Say you’ve got weak boom lift and you suspect an internal cylinder or main control valve issue—this manual walks you through how to isolate the problem, strip those components, inspect them on the bench, then torque and align everything on the way back together.

Applications & Use Cases

• Plan your workspace before a big job: where to stage parts, how to route hoses out of the way, and what to tag so you don’t mix lines on reassembly.
• Trace a hydraulic fault step-by-step, checking pressures and functions in order so you verify the bad area before you start pulling iron apart.
• Tear down swing, travel, or pump components, then inspect wear surfaces and shims while they’re apart so you don’t put worn parts back in.
• Follow general torque sequences and alignment patterns so flanges, housings, and final drives pull down square and don’t preload bearings.
• Reassemble valve stacks and linkages while you test movement, bleed air, and check for binding, so you catch mis-routed hoses or missed pins early.

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 sections by keyword instead of scrolling forever.

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

A: Usually, yes—you can print specific sections, stick them in a sleeve, and keep the laptop clean and away from the grease.

Safety Note

Always support the upperstructure and attachments properly before you get under anything, and never rely on hydraulics alone to hold weight while you inspect or test.

Develon DX380LC-7 Crawler Excavator Index:

• 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
    • Hydraulic System
    • Structure
  • 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
    • Main Oil Circuit
    • Pilot Oil Circuit
    • Return and Drain Oil Circuit
    • Main system operation
    • Pilot System Operation
  • Components Operation, Description and Inspection
    • Safety Instructions
    • Main Pump
    • Main Control Valve
    • Swing Device
    • Fan Pump
    • Fan Motor
    • Joystick Valve
    • Travel Control Valve
    • Solenoid 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
    • DEF (adblue®) Quality Sensor
    • Sensors – After Treatment
    • Engine Assembly
  • Hydraulic Systems and Structure
    • Safety Instructions
    • Before Removing And Instralling
    • Main Pump
    • Drive Coupling
    • Undercovers
    • Hydraulic Oil Tank
    • Fuel Tank
    • Swing Device
    • Fan Pump
    • Fan Motor
    • Joystick Valve (Work Lever)
    • Travel Control Valve
    • Center Joint
    • Travel Device
    • Main Control Valve
    • Cabin
  • Electric and Electronic
    • Safety Instructions
    • Before Removing and Installing
    • Battery Assembly
    • EPOS Controller
    • TMS Controller
    • AVM Controller
    • Microphone Controller
    • Smart Key Controller
    • Wiper 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
    • EPOS Error Code
    • 1. Engine Fault Code List

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