Develon DX400HD-9 Excavator Operation and Maintenance Manual (950106-04091_A_EN)
Out on quarry pads, demo sites, and muddy pipeline jobs, this DX400HD-9 isn’t a toy—it’s moving rock, loading trucks, and chewing through long days. This operation and maintenance manual helps you set a rhythm: what to check before you turn the key, what to service every so many hours, and how to trace problems before they shut you down. Say you’re in peak season and the boom feels slow; instead of guessing, you’ll know how to inspect the hydraulic lines, test for air, and decide if you can finish the shift or need to stop and bleed the system.
Applications & Use Cases
- Set up a daily walk‑around: trace leaks, check track tension, verify fluid levels, and spot loose hardware before something fails under load.
- Plan your periodic services so you can route filters, oils, and grease work into slow days, not when trucks are lined up waiting.
- Isolate odd noises or vibration by following the manual’s sequences to inspect pins, align attachments, and test swing and travel functions.
- Use the start‑up and shut‑down routines to keep the engine, DEF, and hydraulics happy, so the machine usually fires right up after sitting.
- Train new operators to run it correctly—no riding the relief valves, no skipping warm‑up—so you don’t undo months of careful maintenance.
FAQ
Q: Is this manual searchable on a laptop or tablet, or is it just a flat scan?
A: It’s typically a searchable PDF, so you can jump to sections fast, though how well it searches can vary by copy.
Q: Can I print just the pages I need for the jobsite?
A: Yes, most folks print the service intervals, lubrication charts, and key procedures, then stick them in a binder or plastic sleeve by the machine.
Safety Note
Always verify pressure is relieved and components are supported before you crack any hydraulic line or climb under the attachment.
Develon DX400HD-9 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
