Develon DX400LC-9 Excavator Shop Manual (950106-04098_A_EN)
These DX400LC-9s usually live in rock, mud, and demolition mess, running hard all day with operators who don’t baby them. This shop manual’s for when you’re past quick fixes and need to strip big components, trace a problem through the systems, and put it all back together without guessing. Say you’ve got weak digging force and metal in the filters—this helps you plan the teardown, inspect the hydraulic guts while they’re on the bench, then reassemble and bleed the system so you don’t cook a new pump on startup.
Applications & Use Cases
- Plan a major teardown: lay out the workspace, route hoses out of the way, and tag wiring so you can actually find everything during reassembly.
- Trace and isolate hydraulic issues by following logical test steps instead of just throwing parts at it.
- Check wear points on swing, boom, and final drives while they’re open, so you don’t button it up and miss a bad bearing or shim stack.
- Follow general torque sequences and alignment tips so flanges seal, slew rings sit flat, and track frames stay square.
- Verify control linkage and pilot settings after rebuilds, then test functions safely before you send it back to work.
FAQ
Q: Is this a PDF I can search on my laptop or phone?
A: Yeah, 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 for the jobsite?
A: You usually can; most techs print the procedures and diagrams they’ll trash with grease, then keep the main file clean on a device.
Safety Note
Always support the upperstructure and attachments with rated stands or blocking before you get under anything or pull major pins.
Develon DX400LC-9 Excavator Index:
- DX400LC-9, DX400HD-9
- 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
- Front, Specifications
- Track Shoes, Wear Limits and Tolerances
- Idler, Wear Limits and Tolerances
- Upper Roller, Wear Limits and Tolerances
- Lower Roller, Wear Limits and Tolerances
- Engine Specifications
- Safety Instructions
- Engine Specification
- Engine Performance Curves
- Ambient Temperature Sensor
- Tightening Torques
- Hydraulic Systems and Structure Specifications
- Safety Instructions
- Main Control Valve
- Main Pump
- Swing Device
- Travel Device
- Other Hydraulic Components
- 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
- Component location
- Fuel System
- Lubrication system
- Electrical System
- Intake/Exhaust System
- Cooling System
- Aftertreatment System
- Systems Operation, Description and Inspection
- Safety Instructions
- Overview – Components Layout
- Components Operation, Description and Inspection
- Safety Instructions
- Main Pump
- Main Control Valve
- Swing Device
- Systems Operation and Description
- Safety Instructions
- Components Layout of Electrical System
- Weighing and Lift Assist
- SAVM (Smart Around View Monitoring)
- Radar System
- Human Detection System
- Stick Steer
- PHM (Prognostics & Health Management)
- 2D MG/MC Calibration
- ALA Service Calibration
- Service Menu
- Air Conditioner System
- Refrigerant System Repairs
- Troubleshooting
- Electrical System
- 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
- Fan Pump
- Center Joint
- Track Guard
- Travel Device
- Cabin
- Air Condenser Filter
- Electric and Electronic
- Safety Instructions
- Before Removing and Installing
- Battery Assembly
- EPOS Controller
- Slave EPOS Controller
- TGU Controller
- SAVM Controller
- Microphone Controller
- Smart Key Controller
- Wiper Controller
- DC-DC Controller
- PHM Controller
- Display Controller
- ESU Controller
- 3D MC Controller
- Cabin Photo Sensor
- Cabin Switches
- Display Monitor
- Hour Meter
- Smart Junction Box
- Wiper Motor
- Troubleshooting Guide
- Wiring Harness Layout
- Safety Instructions
- Wiring Device
- Error Code
- Safety Instructions
- EPOS Error Code
- Engine Fault Code List
- Schematics
- Hydraulic Schematic
- Electric Schematic
- Main Harness
- Cabin Harness
- Cabin Harness (Floor)
- MCV Joint Harness
- Counterweight Harness
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