Develon DX400HD-9 Excavator Shop Manual (950106-04098_A_EN)
Out on quarry floors, demo sites, and heavy construction, the DX400HD-9 lives in dust, rock, and abuse, so when you tear it down you want a clear plan, not guesswork. This shop manual helps you strip the big systems, trace faults, and then reassemble everything so it starts, swings, and digs like it should. Say you’ve got a boom drift and a weak swing at the same time—this is what you’d use to isolate the hydraulic side, pull the components, inspect them on the bench, then torque and bleed the system right on the way back together.
Applications & Use Cases
- Plan a major teardown of the upper and lower structure so you can route hoses, harnesses, and lines cleanly before the house goes back on.
- Trace a hard hydraulic fault by following the general test sequence, then inspect cylinders, pumps, and valves while they’re already apart.
- Check wear on swing bearing, final drives, and undercarriage, then align everything during reassembly so you don’t preload or bind components.
- Verify torque sequences on critical joints so you don’t crush shims, warp housings, or miss a step when you button it back up.
- Isolate electrical issues, test sensors and switches, and make sure connectors are seated and routed so they don’t rub through later.
FAQ
Q: Is this a downloadable manual I can search on my laptop?
A: Yes, it’s typically a PDF, so you can keyword-search sections while you’re at the machine or on the bench.
Q: Can I print just a few sections to take to the jobsite?
A: You usually can; most techs print the pages for the system they’re tearing down so they don’t drag a laptop into the dirt and oil.
Safety Note
Always support the upper structure and heavy components with rated stands and blocking before you work under or between them, and verify they can’t move.
Develon DX400HD-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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