Develon DX260LC-9 Crawler Excavator Operation and Maintenance Manual (950106-02515DE) (1001 and Up)
Out on a site, this DX260LC-9 usually lives in mud, dust, and tight deadlines—loading trucks, trenching, feeding crushers. This manual helps you set a maintenance rhythm so the machine starts, swings, and digs the same way every day, instead of surprising you when you’re buried in work. Say you’re in peak season and the boom starts moving jerky; with this, you’ll know how to trace the issue, check the hydraulic filters and oil, and decide if you can keep running or need to shut it down before something bigger lets go.
Applications & Use Cases
- Set up daily walk-around checks so you inspect tracks, look for leaks, test lights, and verify fluid levels before the operator even fires it up.
- Plan 250/500‑hour services so you route your grease and filter changes around jobs, not in the middle of a pour or pipe lay.
- Use the troubleshooting flow to isolate weird noises, slow functions, or overheating instead of just throwing parts at it.
- Follow the procedures to bleed fuel or coolant systems properly after a repair so you don’t chase air-lock problems all week.
- Align your maintenance log with the manual’s intervals so you can spot patterns—what usually fails first, what you can stretch, what you really shouldn’t.
FAQ
Q: Is this something I can keep on a tablet and search, or is it just a scanned book?
A: It’s typically a readable PDF, so you can search by term, zoom diagrams, and keep it on a tablet in the truck.
Q: Can I print just the pages I need for the jobsite?
A: Yeah, most folks print the service and lubrication sections they use a lot, then keep the full file clean on a computer or tablet.
Safety Note
Always kill the engine, relieve hydraulic pressure, and lock out the controls before you put your hands near any lines, cylinders, or rotating parts.
Develon DX260LC-9 Crawler Excavator Index:
- DX260LC-9
- Revision
- Foreword
- Intended Use
- Engine and Emission Control System Maintenance
- Machine Capacity
- Attachments
- Product Identification Number (PIN)
- Component Serial Numbers
- Engine Identification
- Your Machine Serial Numbers
- Safety Messages
- Signal Words
- Other Signal Words
- EC DECLARATION OF CONFORMITY
- UK DECLARATION OF CONFORMITY
- Regulation (EU) 2017/654 Annex XV
- Engine operation and maintenance
- Malfunctions & Inducement
- DEVELON Fleet Management System General Information and Privacy Notice
- Safety
- Safety Decals
- Safety Decals With Text
- Safety Decals Without Text (No-Text)
- Information and Location for Safety Decals
- Information and Location for Safety Decals (Continued)
- 1. General Hazard (950205-03804)
- 2. Warning Tag – “Do Not Operate” (950205-03802B)
- 3. Keep Bystanders Away (950205-11463)
- 4. Hot Pressurized Fluid (950205-03781)
- 5. Rotating Fan / Hot Pressurized Fluid / Entanglement in Rotating Parts (950205-07530)
- 6. Battery Explosion (950205-03785)
- 7. Battery Disconnection (950205-03784)
- 8. Flying Debris or Objects (950205-03866)
- 9. Crush Hazard (950205-03805)
- 10. Pressurized Gas and Fluid (950205-03782)
- 11. Fall Hazard (950205-03783)
- 12. Hot Surface (950205-03777)
- 13. Emergency Exit (950205-03810)
- 14. Lifting Capacity Table / Electric Welding Attention / Hydraulic Breaker / ISO Control Pattern (950205-07527)
- 15. Impact Hazard (950205-03963)
- 16. Ultra Low Sulfur Diesel Fuel (950205-03864)
- 17. ROPS Warning (950205-03861)
- 18. Falling Object (950205-03786)
- 19. Fluorinated Greenhouse Gas (EU Only) (950205-06971, 950205-07796B)
- 20. Hydraulic Oil Check (950205-03965)
- 21. Coolant Level Check (950205-05395A)
- 22. Lift/Tie down (950205-03815)
- 23. Tie down (950205-03816)
- 24. Do Not Lift (950205-03570)
- 25. DEF (AdBlue®) (950205-01489A, 950205-07694B)
- 26. BHL Control Pattern (US Only) (950205-03868)
- 27. California Proposition 65 (US Only) (950205-07650)
- General
- Safe Operation is Operator’s Responsibility
- Know Your Machine
- Proper Work Tools and Attachments
- Pressurized Fluids
- Flying or Falling Objects
- Personal Protective Equipment (PPE)
- Correction of Machine Problems
- Crushing and Cutting
- Hot Coolant and Oils – Burn Prevention
- Fire and Explosion Prevention
- Maintenance
- Operation
- Electrical
- Hydraulic System
- Fueling
- Never Use Ether Starting Aids
- Welding and Grinding
- If a Fire Occurs
- Fire Extinguisher and First-aid Kit (Emergency Medical Kit)
- Electrical System and Electrical Shock
- Roll-over Protective Structure (ROPS)
- ROPS Certification
- Protecting Cabin from Flying or Falling Objects (If Equipped)
- Emergency Exit from Operator’s Station
- Regulation 8.35(2) of the Mines Safety and Inspection Regulations (1995)
- Transportation
- Obey State and Local Over-the-Road Regulations
- Loading and Unloading
- Transporting Machine
- Operation
- Before Engine Starting
- Work Site
- Mounting/Dismounting
- Cleaning
- Operator Station
- Seat Belt
- Visibility Information
- Restricted Visibility
- Mirror Adjustment
- Work Site Rules
- Boost Starting or Charging Engine Batteries
- Starting Engine with a Booster Cable
- Connecting Booster Batteries
- Disconnecting Booster Batteries
- Starting Engine
- Swinging or Traveling
- Lifting and Digging
- Operation on Slopes
- Towing
- Attachment
- Equipment Lowering with Engine Stopped
- Engine Stop
- Parking Machine
- Long Term Storage
- Before Storage
- During Storage
- After Storage
- Maintenance
- Warning Tag
- Cleaning
- Proper Tools and Clothing
- Disassembling Precautions
- Use of Lighting
- Fire and Explosion Prevention
- Burn Prevention
- Rubber That Contains Fluorides
- Rubber and Plastics
- Waste Hazardous to the Environment
- Check List After Fire
- Welding Repairs
- Preparation for Electrical Welding On Body Structure
- Warning for Counterweight and Front Attachment Removal
- Lock Inspection Covers
- Working on Machine
- Accumulator
- Compressed Air
- Track Tension Adjustments
- Supports and Blocking for Work Equipment
- High-pressure Lines, Tubes and Hoses
- Battery
- Battery Hazard Prevention
- Environment and Circumstances
- Work Site Areas Requiring Extra Caution
- Digging Under an Overhang
- Deep Digging
- Drop-off or Edge
- Poor Visibility
- Loose or Soft Ground
- High-voltage Cables
- Underground Operation
- Working in Water
- Working in Contaminated Environment
- Operation in Extreme Conditions
- Operation In Extreme Cold
- Operation in Extreme Heat
- Operation In Dusty and Sandy Areas
- Operation in Rainy or Humid Conditions
- Operation in Saltwater Areas
- Operation at High Altitudes
- Operation During Electrical Storms
- Exhaust Ventilation
- Ventilation for Enclosed Area
- Asbestos Information
- Silica Dust Information
- Disposal of Hazardous Materials
- Sound
- Vibration Information
- Hand/Arm Vibration Level
- Whole Body Vibration Level
- Guidelines for Use and Working Conditions of Earth-moving Machinery to Reduce Vibration Levels (ISO/TR 25398 Annex E)
- 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
- 1. Cabin Work Light Button
- 2. Travel Alarm Mute Button
- 3. Lower Wiper and Washer Button
- 4. Upper Wiper, Panto Wiper and Washer Button
- 5. Travel Speed Selector Button
- 6. Light Button
- 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
- 1. Intelligent Floating Boom Button
- 2. Swing Lock Button
- 3. Fine Swing Button
- 27. Jog Shuttle and Buttons
- 1. Work Power Mode Button
- 2. Work Mode Button
- 3. Jog Shuttle
- 4. ESC Button
- 5. Buzzer Alarm Mute Button (If Equipped)
- 6. Audio Button
- 7. Heater and Air Conditioner Button
- 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
- Display Monitor
- 1. Digital Clock
- 2. Select Work Power Mode Button
- 3. Hydraulic Oil Temperature Gauge
- 4. Enigne RPM
- 5. Reset Trip Information Button
- 6. Fuel Level Gauge
- 7. SAVM Expansion Button
- 8. Set SAVM Sound Mute Button
- 9. SAVM Screen
- 10. Set SAVM Button
- 11. User Menu Button
- 12. My Menu Button
- 13. Shortcut
- 14. Change APP Button
- 15. Set SAVM View Mode
- 16. DEF (AdBlue®) Level Gauge
- 17. Select Main Information
- 18. Tachometer
- 19. Engine Coolant Temperature Gauge
- 20. Main Information Indicator
- 21. Select Work Mode Button
- 22 ~ 24. Mode / Indicator / Display Warning Symbols
- Warning Pop-Up Messages
- User Menu
- Access/Exit Method
- User Menu
- Smart Breaker
- Human Detection System (HDS)
- SAVM System (Smart Around View Monitoring System)
- Description
- Operating Conditions and Instructions
- Screen Components and View Modes
- PHM System (Prognostics and Health Management System)
- Stick Steering
- 2D Machine Guidance (2D MG)
- 1. Light Bar
- 2. Information Tags
- 3. Status Bar
- 4. Menu Button
- 5. Detailed Menu Button
- 6. Warning/Caution Notification
- 1. 2D Machine Guidance Notification Message Button
- 2. 2D Machine Guidance Sound ON/OFF Button
- 3. 2D Machine Guidance Settings Menu Button
- 2D Machine Control (2D MC)
- Set Assist
- 1. Set Assist Mode
- 2. Set Grade Precision
- 3. Set Grade Mode
- 4. Set Grade Assist
- Set Virtual Wall
- 1. Enable Height Limit (It can be toggled on/off)
- 2. Set Height Limit
- 3. Enable Front Limit (It can be toggled on/off)
- 4. Set Limit Distance
- 5. Enable Depth Limit (It can be toggled on/off)
- 6. Set Limit Depth
- 7. Enable Cabin Avoidance (It can be toggled on/off)
- 8. Enable Dozer Avoidance (It can be toggled on/off)
- 9. Enable Track Avoidance (It can be toggled on/off)
- Set Swing Control
- 1. Left/Right Swing Assist (It can be toggled on/off)
- 2. Set Left/Right Swing Assist Value
- 3. Left/Right Swing Limit (It can be toggled on/off)
- 4. Set Left/Right Swing Limit Value
- Weighing
- 1. Bucket Count
- 2. Truck Load Weight and Switching Button
- 3. Progress Gauge
- 4. Truck Count
- 5. Material Name and Set Buttons
- 6. Weighing Function Activation Switch (Toggle ON/OFF)
- 7. Set Weighing System Menu Button
- 8. Bucket Load and Remaining Truck Weight
- 9. Target Weight
- 10. Undo Button
- 11. Truck Load Complete Button
- 12. Truck Name and Set Buttons
- 13. Set Target Weight Button
- Lift Assist
- 1. Actual Load (Tons)
- 2. Rated Load (Tons)
- 3. Machine Indicator
- 4. Safe Operating & Warning Indicator
- 5. Vertical Height (Meters)
- 6. Horizontal Reach (Meters)
- 7. Lifting Load Gauge
- 8. Lifting Load (Percent)
- Advanced Lift Assist
- 1. Actual Load (Tons)
- 2. Rated Load (Tons)
- 3. Machine Indicator
- 4. Safe Operating & Warning Indicator
- 5. Vertical Height (Meters)
- 6. Horizontal Reach (Meters)
- 7. Lifting Load Gauge
- 8. Lifting Load (Percent)
- 9. Warning Alarm Mute Button
- 10. Lift Assist Setting Button
- Miscellaneous Electrical Devices
- Cabin Light
- Safety Lever
- Main Fuses (100A, 80A)
- Fuse Boxes
- DAB (Digital Audio Broadcasting) Audio
- Seat Adjustment
- 1. Forward/Backward Adjustment
- 2. Height Adjustment
- 3. Weight Indicator
- 4. Control Stand Height Adjustment
- 5. Tilt Adjustment
- 6. Cushion Slide Adjustment
- 7. Reclining Adjustment
- 8. Lumbar Support Adjustment
- 9. Heating/Ventilation Switch (If Equipped)
- Types of Seat Belts
- 2-Point Support
- 3-Point Support
- 4-Point Support
- Locking and Unlocking
- Engine Emergency Stop Switch
- Emergency Exit Glass Breaking Tool
- Miscellaneous Convenience Devices
- Ceiling Cover
- Opening Ceiling Cover
- Closing Ceiling Cover
- Front Windows
- Front Upper Window
- Front Bottom Window
- Door Side Latch
- Cabin Storage Compartments
- Sun Visor
- Front Window Sun Visor
- Ceiling Door Sun Visor (If Equipped)
- Rear Window Sun Visor (If Equipped)
- Sunglasses Case
- Cup Holder
- Storage Box
- Miscellaneous Access Covers and Doors
- Side Door
- Storage Box Door
- Engine Hood
- Air Gun and Compressor (If Equipped)
- Air Gun
- How to Use Air Compressor
- How to Connect Air Gun
- Connecting the Air Gun in the Cabin
- Connecting the Air Gun Directly to the Air Compressor Motor in the Battery Box
- Operation
- To Operate a New Excavator
- Starting and Stopping Engine
- Inspection Before Starting Engine
- Walk Around Checks
- Checks Before Starting Engine
- Operational Checks Before Starting Engine
- Engine Start
- Hydraulic System Warm-up
- Hydraulic System Warm-up – Cold Weather
- Stopping Engine
- Checks and Maintenance After Stopping Engine
- Wait to Disconnect Indicator
- Safety Lever
- Travel
- Automatic Travel Speed Control
- Travel Control Lever Operation
- General Travel Instructions
- Straight Travel Pedal (If Equipped)
- Operating Instructions
- Engine Speed Control
- Emission Control System
- Low Level DEF
- DEF Quality / Dosing Error
- The Value of the Carbon Dioxide (CO2) Emissions
- Inducement
- After Treatment System
- Active Regeneration
- Manual (Forced) Regeneration
- Mode Selection
- Power Mode
- Work Mode
- Auto Idle Mode
- Power Max Mode
- Work Levers (Joysticks) (ISO Pattern)
- Intelligent Floating Boom Control (If Equipped)
- Intelligent Floating Boom Mode
- Operating a Breaker
- Truck Loading
- Dozer Blade (If Equipped)
- Two-Piece Boom (If Equipped)
- Operating Precautions
- Working in Water
- Escaping From Mud
- Track On One Side Stuck
- Tracks On Both Sides Stuck
- Parking Excavator
- Towing Procedure
- Attachments
- Bucket Replacement and Reversal
- Replacement
- Reversal (If Applicable)
- Hydraulic Attachments (If Equipped)
- Breaker Operation
- Selection of Hydraulic Breaker
- Hydraulic Hoses and Tubing for Breaker
- Breaker Operating Precautions
- To Activate Breaker
- Shear Operation
- One-Way/Two-Way Valve Operation
- Activating Shear with Pedal Valve
- Activating Breaker with Pedal Valve
- Stopper Positions
- Rotating Operation
- Quick Coupler Operation
- To Engage Attachment
- To Release Attachment
- Lifting Objects
- Lifting Unknown Weight
- Lifting Known Weight
- Pick and Carry
- Lifting Objects with Quick Coupler
- Equipment Lowering with Engine Stopped
- Machine without a Boom Lock Valve
- Machine with a Boom Lock Valve
- Inspection, Maintenance and Adjustment
- Maintenance Information
- Operational Hour Meter Reading
- DEVELON Genuine Replacement Parts
- DEVELON Genuine Lubricants
- Windshield Washer Fluid
- Fresh and Clean Lubricants
- Check Drained Oil and Used Filter
- Check for Leaks in Fuel System
- Fuel Strainer
- Welding Instructions
- Do Not Drop Things Inside Machine
- Dusty Work Site
- Avoid Mixing Lubricants
- Locking Inspection Covers
- Check for Leaks in Hydraulic System
- Hydraulic System – Air Bleeding
- Hydraulic Hose Installation
- Checks After Inspection and Maintenance Works
- Coolant, Oil, Fuel – Drain and Change
- Safety Precautions
- Machine Setup Position for Maintenance
- Handling Oil, Fuel, DEF (AdBlue®), Coolant
- Oil
- Fuel
- DEF (AdBlue®)
- Engine Oil
- Grease
- Coolant and Water for Dilution
- Filters
- Electrical System Maintenance
- Recommend Fuel, Coolant, and Lubricant
- Lubrication
- Symbols for “Lubrication and Service Chart”
- Lubrication and Service Chart
- Hydraulic Oil and Filter Service Intervals
- 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
- Additional 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
- Inspection and Maintenance of the Safety Lever
- Exterior Lights, Horn, Control Console Indicator, Gauge Panel – Check
- Overall of Engine Condition – Check
- All Controls and Linkages – 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 (One Piece Boom) – Lubricate
- Boom and Arm Joint Pins (Two – Piece Boom) – 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
- Additional Water Separator – Clean
- 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
- Air Cleaner Outer and Inner Filter – Replace
- 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 and Suction Filter – 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 ISO 8331 and EN982 (CEN))
- Air-Conditioning System
- Check Control Panel
- Check Air Conditioner Hoses
- Check Condenser
- Check Magnetic Clutch
- Bucket
- Bucket Tooth Replacement
- Bucket O-ring Replacement
- Electrical System
- Battery
- Batteries in Cold Weather
- Inspection of Battery Electrolyte Level
- Check Charging State
- Check Battery Terminals
- Battery Replacement
- Fuses
- Junction Box
- Fuse and Relay Identification
- Engine Cooling System
- General
- Antifreeze Concentration Tables
- Table of Standards for Allowed Tap Water
- Fuel Transfer Pump (If Equipped)
- Handling of Accumulator
- Track Tension
- Venting and Priming Hydraulic System
- Main System Pump
- Hydraulic Cylinders
- Swing Motor
- Travel Motor
- General Venting
- Maintenance in Special Conditions
- Transportation
- Loading and Unloading
- Warning for Counterweight and Front Attachment Removal
- Counterweight
- Lifting Machine
- Specification
- Standard Specification
- Overall Dimensions
- One – Piece Boom
- Two – Piece Boom
- Disassembled Parts, Dimension and Weight
- Ground Pressure
- Digging Force
- Arm – Tearout Force
- Bucket – Breakout Force
- Working Range
- One – Piece Boom
- Two – Piece Boom
- Excavator Rated Lift Capacity Tables
- Approximate Weight of Workload Materials
- Index
Develon
