Develon DX400LC-9 Crawler Excavator Operation and Maintenance Manual (950106-04091_A_EN)
This DX400LC-9 usually lives in the rough stuff—quarries, demo sites, pipe trenches, big dirt jobs. This manual’s about keeping that excavator predictable: you’ll trace small issues early, stick to a maintenance rhythm, and avoid surprise shutdowns when you’re buried in work. Say you start a night shift and the boom feels sluggish; instead of guessing, you can step through the book, check filters, verify hydraulic oil level, and decide if you can run it or need to shut it down.
Applications & Use Cases
- Set up daily walk‑arounds so you inspect tracks, trace leaks, check fluid levels, and spot loose hardware before it turns into downtime.
- Plan 250/500-hour services so you don’t miss filters, grease points, and adjustments that usually get skipped when the job’s busy.
- Use the troubleshooting flow to isolate odd noises, test functions, and route wiring checks instead of just throwing parts at it.
- Verify proper attachment changes, then align and test the hydraulics so you don’t blow hoses or cook a pump.
- Bleed air from fuel or hydraulic systems the right way after repairs, so the machine starts and cycles like it should.
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 and find terms quickly.
Q: Can I print just a few pages to keep in the cab?
A: You usually can; most folks print the service intervals, lubrication chart, and key procedures for jobsite use.
Safety Note
Always lock out the machine and verify all pressure is relieved before you crack any hydraulic line or fitting.
Develon DX400LC-9 Crawler Excavator Index:
- Foreword
- EC Declaration of Conformity
- UK Declaration of Conformity
- Safety
- Safety Decals
- Safety Decals With Text
- Safety Decals Without Text (No-Text)
- Information and Location for Safety Decals
- General
- Transportation
- Operation
- Long Term Storage
- Maintenance
- Environment and Circumstances
- Operating Controls
- Component Locations
- Operator’s Area
- Operational Controls And Panels
- 1. Safety Lever
- 2. Dozer Lever
- 3. Air Compressor Switch (If Equipped)
- 4. After Treatment System Switch
- 5. 24V Power Socket
- 6. Machine Check Connector (OBD: On Board Diagnostics)
- 7. USB for Display Monitor
- 8. Auxiliary Mode Switch
- 9. Emergency Start Mode Switch
- 10. Swing Break Release Switch
- 11. Speaker for Display Monitor
- 12. DAB Audio (If Equipped)
- 13. 12V Power Socket
- 14. USB Charger
- 15. Quick Coupler Switch (If Equipped)
- 16. Key Pad
- 17. Engine Speed Control Dial
- 18. Micro Phone (If Equipped)
- 19. Start/Stop Button
- 20. Smart Key
- 21. Hour Meter
- 22. Display Monitor
- 23. Additional Display Monitor (If Equipped)
- 24. Photo Sensor
- 25. Mobile Phone Wireless Charging Console
- 26. Multifunction Keypad
- 27. Jog Shuttle and Buttons
- 28. Breaker/Power Max Button
- 29. Intelligent Floating Boom Temporary Reset
- 30. Shear Switch (If Equipped)
- 31. Store Truck
- 32. On/Off Weighing
- 33. One Touch Deceleration Button
- 34. Horn Button
- 35. Rotating Switch (If Equipped)
- 36. Additional Button
- 37. On/Off Grade Assist
- 38. Auto Grease System Switch (If Equipped)
- Display Monitor
- User Menu
- Access/Exit Method
- User Menu
- Smart Breaker
- Human Detection System (HDS)
- SAVM System (Smart Around View Monitoring System)
- PHM System (Prognostics And Health Management System)
- Stick Steering
- 2D Machine Guidance (2D MG)
- 2D Machine Control (2D MC)
- Weighing
- Lift Assist
- Advanced Lift Assist
- Miscellaneous Electrical Devices
- Seat Adjustment
- Types Of Seat Belts
- Engine Emergency Stop Switch
- Emergency Exit Glass Breaking Tool
- Miscellaneous Convenience Devices
- Miscellaneous Access Covers And Doors
- Air Gun And Compressor (If Equipped)
- Operation
- To Operate A New Excavator
- Starting And Stopping Engine
- Safety Lever
- Travel
- Operating Instructions
- Operating Precautions
- Parking Excavator
- Towing Procedure
- Attachments
- Hydraulic Attachments (If Equipped)
- Lifting Objects
- Lifting Objects With Quick Coupler
- Auto Grease System (If Equipped)
- Inspection, Maintenance and Adjustment
- Maintenance Information
- Machine Setup Position For Maintenance
- Handling Oil, Fuel, DEF (AdBlue®), Coolant
- Electrical System Maintenance
- Recommend Fuel, Coolant And Lubricant
- Fluid Capacities
- Table Of Recommended Lubricants
- Maintenance Intervals
- 10 Hour / Daily Service
- Boom, Arm and Front Attachment Pins – Lubricate
- Engine Oil Level – Check
- Hydraulic Oil Level – Check
- Fuel Level – Check
- DEF (AdBlue®) Tank Level- Check
- Pre Fuel Filter and Water Separator – Check
- Swing Reduction Gear Oil Level – Check
- Dust Net – Clean
- Coolant Level – Check
- Window Washer Liquid Level – Check
- Bucket Teeth and Side Cutters – Inspect
- Cooling Fan Blade – Inspect
- Air Intake System and Emission Control System – Check
- Seat Belt – Inspect
- AVM (Around View Monitoring system) – Check
- Mirrors – Check
- Structure – Inspect
- All Switches and Travel Alarm (If Equipped) – Check
- Safety Lever – Check
- Exterior Lights, Horn, Control Console Indicator, Gauge Panel – Check
- Overall of Engine Condition – Check
- All Controls and Linkages – Check
- Oil Bath Precleaner (If Equipped) – Check
- 50 Hour / Weekly Service
- Perform All Daily Service Checks
- Arm and Bucket Joint Pins – Lubricate
- Swing Bearing – Lubricate
- Fuel Tank Water and Sediment – Drain
- Air Compressor and Tank – Check
- Engine Fan Belt – Check
- Track Assemblies (Links, Shoes, Rollers, Idlers) – Inspect
- 250 Hour / Monthly Service
- Perform All Daily and 50 Hour Service Checks
- Boom and Arm Joint Pins – Lubricate
- Engine Fan and Alternator Belts – Check
- Breaker Filter (If Equipped) – Replace
- Final Drive Gear Oil – Change
- Hydraulic Oil Return Filter – Replace
- Pilot Filter – Replace
- Swing Reduction Gear Oil – Change
- Pin and Bushings of the Front End Attachment – Inspect
- Battery Fluid – Check
- Bolts and Nuts – Inspect
- Fuel System Hose Clamps – Inspect
- 500 Hour / 3 Month Service
- Perform All Daily, 50 and 250 Hour Service Checks
- Track Spring – Check
- Swing Gear and Pinion – Lubricate
- Engine Oil and Filter – Replace
- Air-Conditioning Outer Filter – Clean
- Air-Conditioning Inner Filter – Clean
- Cooling System – Clean
- Air Cleaner Outer Filter – Clean
- Final Drive Gear Oil – Check
- Air Compressor Filter (If Equipped) – Clean
- 1,000 Hour / 6 Month Service
- Perform All Daily, 50, 250 and 500 Hour Service Checks
- Swing Reduction Gear – Lubricate
- Hydraulic Oil Tank Breather Filter – Replace
- Hydraulic Oil Return Filter – Replace
- Pre Fuel Filter – Replace
- Main Fuel Filter – Replace
- Pilot Filter – Replace
- Final Drive Gear Oil – Change
- Swing Reduction Gear Oil – Change
- Air-Conditioning Outer Filter – Replace
- Air-Conditioning Inner Filter – Replace
- Check and Adjust Engine**
- 2,000 Hour / Yearly Service
- Perform All Daily, 50, 250, 500 and 1,000 Hour Service Checks
- Hydraulic Oil Suction Strainer – Cleaning
- Air Cleaner Outer and Inner Filter – Replace
- Oil Bath Precleaner (If Equipped) – Change
- Alternator and Starter** – Check
- Rubber Antivibration Shock Mounts – Check
- Perform and Record Results of Cycle Time Tests
- Inspect Machine to Check for Cracked or Broken Welds or other Structural Damage
- Adjust Valve Clearance** – Check
- Head Bolt Torques – Check
- 4,000 Hour / Biennial Service
- Hydraulic Oil – Replace
- Major Parts – Periodic Replacement
- 4,500 Hour / Biennial Service
- DEF (AdBlue®) Filter – Replace
- DEF (AdBlue®) Breather Filter – Replace
- 6,000 Hour / 3 Year Service
- 8,000 Hour / 4 Year Service
- 12,000 Hour / 6 Year Service
- Hose In-service Lifetime Limit (European Standard ISO8331 and EN982(CEN))
- Air-Conditioning System
- Bucket
- Electrical System
- Engine Cooling System
- Fuel Transfer Pump (If Equipped)
- Handling Of Accumulator
- Track Tension
- Venting And Priming Hydraulic System
- Maintenance In Special Conditions
- Transportation
- Loading And Unloading
- Lifting Machine
- Specification
- Standard Specification
- Overall Dimensions
- Disassembled Parts, Dimension And Weight
- Ground Pressure
- Digging Force
- Working Range
- Excavator Rated Lift Capacity Tables
- Approximate Weight Of Workload Materials
Develon
