Develon DX140LC-7K Crawler Excavator Shop Manual (950106-03086_B_EN)

Out on sites, this DX140LC-7K is usually trenching, loading trucks, or cleanup work around utilities and road jobs, in dust, mud, and cold starts. This shop manual’s what you use when you’re past simple filters and need to tear in deep without guessing. Say you’ve got a swing motor noise: with this, you can trace the issue, plan the teardown, inspect the guts on the bench, then reassemble it without leaving a shim out or a bearing half-seated.

Applications & Use Cases

• Plan a major teardown by laying out the workspace, routing hoses out of the way, and isolating the right circuits before you crack anything open.
• Follow general torque sequences so you don’t warp housings when you align and bolt down final drives, swing gearboxes, or track components.
• Inspect internal parts while they’re apart—bushings, pins, gears—so you can decide what to replace now instead of splitting it again next month.
• Trace hydraulic faults step‑by‑step, test pressures at the proper ports, and verify whether it’s a valve, pump, or actuator before buying parts.
• Bleed fuel and hydraulic systems correctly after repairs so you don’t fight hard starts, cavitation, or lazy functions.

FAQ

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

A: Yes, it’s typically a searchable PDF, so you can jump to systems or keywords instead of flipping pages.

Q: Can I print just the sections I need for the jobsite?

A: You usually can; most techs print the teardown and torque pages, stick them in sleeves, and keep the full file on a tablet or laptop.

Safety Note

Always support the upperstructure and attachments properly before you work under or around them, and verify all pressure has been relieved from the hydraulic system.

Develon DX140LC-7K Crawler Excavator Index:

• DX140LC-7K
  • Safety, Specification and Systems Operation
    • Track Excavator Maintenance Safety
      • Safety Instructions
      • 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
      • Approximate Weight of Workload Materials
    • Engine Specifications
      • Safety Instructions
      • Engine Specification
      • Engine Performance Curves
      • Tightening Torques
    • Hydraulic Systems and Structure Specifications
      • Safety Instructions
      • Hydraulic System
    • Elec and Electric Specifications
      • Safety Instructions
      • Electrical System
    • 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 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
      • Special Tools
      • Fuel System
      • Cooling System
      • Exhaust System
      • Lubrication system
      • Electrical System
      • After Treatment System
    • Components Operation, Description and Inspection
      • Safety Instructions
      • Main Pump
      • Main Control Valve
    • Systems Operation and Description
      • Safety Instructions
      • Power Supply
      • Starting System
      • Charging System
      • AVM System
      • Gauge Panel System
      • EPOS 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 Installing
      • Drive Coupling
      • Undercovers
      • Joystick Valve(Work Lever)
      • Travel Control Valve
      • Main Control Valve
      • Main Pump
      • Hydraulic Oil Tank
      • Fuel Tank
      • Swing Device
      • 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
      • EPOS ERROR CODE
      • 1. Engine Fault Code List
  • Schematics
    • DX140LC-7K Hydraulic Schematic
    • DX140LC-7K Electric Schematic
    • Main Harness
    • Cabin Harness

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