Develon DL320-7 Wheeled Loader Operation and Maintenance Manual (950106-02234GE) (10001 and Up)
A DL320-7 usually lives in the rough stuff—quarries, feed yards, batch plants, snow piles—where it’s loading, hauling, and jockeying around all day. This operation and maintenance manual keeps you on a steady service rhythm so the loader starts, steers, and lifts when you need it, not when it feels like it. Picture this: you’re in peak season, machine won’t build air, and you’re losing trucks; with the manual, you can trace the daily checks you skipped and know exactly what to inspect and when.
Applications & Use Cases
- Set up a daily walk‑around so you always check fluids, leaks, tire damage, and loose hardware before the loader ever leaves the yard.
- Follow the service intervals to know when to change filters, bleed fuel and cooling systems, and test safety circuits instead of guessing.
- Use it to isolate weird behavior—slow lift, spongy brakes, hard starts—by tracing through the recommended checks in the right order.
- Verify you’re operating it correctly: warm‑up, shutdown, parking on grades, bucket positioning, and how to route it safely around people and trucks.
- Plan downtime during slow periods so you can inspect pins, align steering, and check wear parts before busy season hits.
FAQ
Q: Is this manual searchable, or am I stuck flipping pages?
A: The digital version is typically searchable by keyword, so you can jump straight to the system you’re working on.
Q: Can I print a copy to keep in the cab or shop?
A: Usually yes; most folks print key sections—daily checks, lubrication chart, basic troubleshooting—and keep the full file on a laptop or tablet.
Safety Note
Always relieve system pressure and secure the loader on level ground before you inspect, test, or bleed any hydraulic or brake components.
Develon DL320-7 Wheeled Loader Index:
- DL320-7
- Revision
- Table of Contents
- Foreword
- Intended Use
- Engine and Emission Control System Maintenance
- Machine Capacity
- Product Identification
- Product Identification Number (PIN)
- Engine Identification
- Machine Serial Numbers
- Safety Messages
- 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
- Information and Location for Safety Decals
- 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
- Fire Extinguisher and First-Aid Kit (Emergency Medical Kit)
- Electrical System and Electrical Shock
- Roll-over Protective Structure (ROPS)/ Falling Object Protective Structure (FOPS)
- Regulation 8.35(2) of the Mines Safety and Inspection Regulations (1995)
- Transportation
- Obey State and Local Over-The-Road Laws and Regulations
- Loading and Unloading
- Transporting Machine
- Operation
- Before Engine Starting
- Work Site
- Check Tire Pressure and Condition
- Mounting / Dismounting
- Cleaning
- Window Maintenance
- Operator Station
- Seat Belt
- Visibility Information
- Boost Starting or Charging Engine Batteries
- Starting Engine
- Traveling
- Lifting and Digging
- Operation on Slopes
- Towing
- Attachment
- Equipment Lowering With Engine Stopped
- Preventing Risk of Injuries or Death From Arm and Bucket
- Engine Stop
- Parking Machine
- Long Term Storage
- Before Storage
- During Storage
- After Storage
- Cleaning
- Hydraulic System
- Lubrication
- Battery
- Cooling System Care
- Preservation / Storing Machine
- 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
- Welding Repairs
- Lock Inspection Covers
- Working on Machine
- Accumulator
- Compressed Air
- Supports and Blocking for Work Equipment
- High-pressure Lines, Tubes and Hoses
- Battery
- Environment and Circumstances
- Work Site Areas Requiring Extra Caution
- High-voltage Cables
- Underground Operation
- Working in Water
- Working in Contaminated Environment
- Operation Under Abnormal Conditions
- Exhaust Ventilation
- Asbestos Information
- Silica Dust Information
- Disposal of Hazardous Materials
- Sound
- Vibration Information
- Operating Controls
- Component Locations
- Operator’s Area
- Operational Controls and Panels
- Start / Stop Button
- Smart Key
- HVAC (Heating, Ventilation and Air Conditioning) Control Keypad
- 12V Power Socket
- USB Power Socket
- Microphone
- Steering Column
- Accelerator Pedal
- Brake Pedal
- Differential Lock Button (Manual / If Equipped)
- Multifunction Keypad
- Joystick Lever (Elec / Hyd)
- Finger Tip Lever (If Equipped)
- Finger Tip Lever (Elec/If Equipped)
- Rear Defrost Switch
- Hazard Warning Light Switch
- Quick Coupler Switch (If Equipped)
- Air Compressor Switch (If Equipped)
- Auto Grease System Switch (If Equipped)
- Parking Brake Switch
- Pilot Cutoff Switch
- Mirror Adjustment Switch
- Emergency Start Switch
- Photo Sensor
- Left Side Electric Steering Control Unit (If Equipped)
- Electric Steering Selector Button
- FNR Control Switch
- Kick Down Button
- Electric Steering Joystick
- Position Adjustment Knob
- Armrest Cutoff
- Front Gauge Panel
- Right / Left Turn and Hazard Warning Light
- Transmission Actual Gear
- Communications Status Symbol
- Transmission Select Gear
- Engine Coolant Temperature Gauge
- Hydraulic Oil Temperature Gauge
- Transmission Oil Temperature Gauge
- Fuel Gauge
- DEF (AdBlue®) Level Gauge
- RPM Indicator / Hour Meter
- Speedometer
- Indicator Display
- Warning Symbol Indicator
- Display Monitor
- Functional Check
- Setting a Password
- Main Warning Lamp
- Menu Selector Button
- Back Button
- Digital Clock
- Main Information Indicator
- Power Mode Indicator
- Camera Indicator
- Bookmark Button
- Main Information Selector Button
- Power Mode Selector Button
- View Mode Selector Button
- Weighing System Information Display
- HVAC Display
- Multifunction Keypad Indicator
- Audio Display
- Mode Symbol Display
- Indicator Display
- Display Warning Symbols
- Inclination Indicator
- Warning Pop-Up Messages
- User Menu
- Access Method
- Exiting / Escaping Menus
- Maintenance
- Fuel Efficiency Performance
- Machine Configuration
- Weighing Configuration
- Gauge Panel Configuration
- Operator Management
- Operator Management (Keyless Start)
- Weighing System (If Equipped)
- Weighing System Message Indicator
- Weighing Measure Weight Indicator
- Current Truck Load Weight
- Weight Remaining Relative to Target
- Target Weight
- Progress Indicator
- Cancel Previous Task Button
- Pause / Resume Button
- Count Indicator
- Count Reset Button
- Weighing System Management Button
- Zero Calibration Button
- Around View Monitoring (AVM) System (If Equipped)
- Proximity Alarm System
- Transparent Bucket System
- 1. Main Display
- 2. Rear Distance Display Button
- 3. Display On/Off Button
- 4. Left/Right View Reversal Button
- 5. Day/Night Mode Switch Button
- Camera Installation Position
- Operation Condition and Method
- Screen Composition
- HVAC (Heating, Ventilation and Air Conditioning) Operation
- Location Of Vents
- Operation
- Automatic Temperature Control Button
- Mode Selector Button
- Air Conditioner Button
- Temperature Control Button
- Fan Speed Selector Buttons
- OFF Button
- Defroster Button
- Air Inlet Selector Button
- Memory Function
- Additional Operating Instructions
- Seat Adjustment
- Grammer Seat
- 1. Weight Adjustment
- 2. Height Adjustment
- 3. Seat Pan Angle Adjustment
- 4. Seat Depth Adjustment
- 5. Absorber
- 6. Armrest Adjustment
- 7. Armrests
- 8. Headrest
- 9. Seat Heater
- 10. Lumbar Support
- 11. Backrest Adjustment
- 12. Fore/Aft Isolator
- 13. Fore/Aft Adjustment
- Mechanical Seat
- 1. Adjusting Seat Forward/Backward Lever
- 2 and 3. Adjusting Seat’s Angle and Height Lever
- 4. Weight Adjustment Knob
- 5. Backrest Adjustment Lever
- 6. Angle Adjustment of Armrest
- 7. Headrest
- Recommendations for Limiting Vibrations
- Sears Seat
- Forward / Backward Adjustment
- Height and Firmness Adjustment
- Headrest
- Seat Heater Switch
- Armrest Adjustment
- Lumbar Adjustment
- Backrest Adjustment
- Seat Belt
- Seat Belt Locking and Unlocking
- Miscellaneous Electrical Devices
- Cabin Light
- Circuit Breaker (50A, 80A)
- Electrical Box
- Junction Box
- DAB (Digital Audio Broadcasting) Audio
- Miscellaneous Convenience Devices
- Cabin Storage Compartments
- Sun Visor
- Sun Visor (Left, Right)
- Sunglass Case
- Cup Holder
- Tool Box
- Grease Gun Clip
- Engine Emergency Stop Switch
- Emergency Exit Glass Breaking Tool
- Full Fender
- Miscellaneous Access Covers and Doors
- Remote Door Switch
- Cabin Door Side Latch
- Side Door
- Radiator Cover
- Wheel Chocks
- Air Gun and Compressor (If Equipped)
- Air Gun
- How to Use Air Compressor
- How to Connect Air Gun
- Operation
- To Operate a New Wheel Loader
- Monitoring System
- New Machine Break-in Procedures
- Starting and Stopping Engine
- Inspection Before Starting Engine
- Operational Checks Before Starting Engine
- Engine Start
- After Start Limit Logic
- Automatic Warming Up Operation
- Plug Heater (If Equipped)
- Stopping Engine
- Checks and Maintenance After Stopping Engine
- Wait to Disconnect Indicator
- Travel
- F/R (Forward/Reverse) Travel Control System
- Machine Shut Down
- If Engine Stalls While Traveling
- Towing Procedure
- Emission Control System
- Coolant Temperature
- Engine Oil Pressure
- Charging Indicator Light
- Aftertreatment System
- Attachments (If Equipped)
- Arm Kick Out Button
- Adjustment of Bucket Position Switch
- Quick Coupler Operation
- Auto Grease System (If Equipped)
- Overview
- Location
- Lubricants
- Pump Display and Control Elements of Control Screen
- Pump Display Mode
- Pump Programming
- Maintenance
- Troubleshooting
- Inspection, Maintenance and Adjustment
- Maintenance Information
- Safety Precautions
- Arrival Inspections and Delivery Instructions
- Machine Setup Position for Maintenance
- Service Position
- Handling Oil, Fuel, DEF (AdBlue®) Coolant
- Oil
- Fuel
- Biodiesel (FAME)
- DEF (AdBlue®)
- Engine Oil
- Coolant and Water for Dilution
- Grease
- Filters
- Electrical System Maintenance
- Recommend Fuel, Coolant, and Lubricant
- Lubrication
- Symbols for “Lubrication and Service Chart”
- Fluid Capacities
- Table of Recommended Lubricants
- Transmission Oil
- Axle Oils
- Maintenance Intervals
- 10 Hour / Daily Service
- Front Attachment Pins – Lubricate
- Engine Oil Level – Check
- Transmission Oil Level – Check
- Hydraulic Oil Level – Check
- Fuel Level – Check
- DEF (AdBlue®) Tank Level – Check
- Pre Fuel Filter and Water Separator – Drain
- 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
- Mirrors – Check
- Structure – Inspect
- All Switches – Check
- Exterior Lights, Horn, Control Console Indicator, Gauge Panel – Check
- Overall of Engine Condition – Check
- Back Up Alarm and Rear Camera (If Equipped) – Check
- All Tires Pressure and Damage or Abnormal Wear – Inspect
- All Controls and Linkages – Check
- Pipes and Hoses – Check
- Brake System – Test
- 50 Hour / Weekly Service
- Perform All Daily Service Checks
- Front Attachment Pins – Lubricate
- Steering Cylinder Rod and Head Ends – Lubricate
- Upper and Lower Center Pins – Lubricate
- Air Conditioner and Alternator Belt Tension (After First 50 Hours) – Check
- Exterior of Radiator, Oil Cooler and Air Conditioner Condenser – Clean
- Air Conditioner Outer Filter – Clean
- Fuel Tank Water and Sediment – Drain
- Air Compressor Tank (If Equipped) – Check
- Oil Bath Precleaner (If Equipped) – Check
- 250 Hour / Monthly Service
- Perform All Daily and 50 Hour Service Checks
- Front Attachment Pins – Lubricate
- Driveshaft – Lubricate
- Center Propeller Shaft – Lubricate
- Hydraulic Oil Tank – Drain
- Oil Bath Precleaner (If Equipped) – Change
- Air Conditioner Belt Tension – Check
- Transmission Oil and Filter – Replace
- Hydraulic Oil Return Filter – Replace
- Auto Grease System (If Equipped) – Check
- 500 Hour / 3 Month Service
- Perform All Daily, 50 and 250 Hour Service Checks
- Air Cleaner Outer Filter – Clean
- Brake and Pilot Filter – Change
- Engine Oil and Filter – Change
- Adjust Valve Clearance – Check
- Axle Differential and Planetaries Oil – Change
- Air Conditioner Outer Filter – Replace
- Air Conditioner Inner Filter – Clean
- Hydraulic Oil Contamination – Check
- Air Compressor Filter (If Equipped) – Clean
- 1,000 Hour / 6 Month Service
- Perform All Daily, 50, 250, and 500 Hour Service Checks
- Air Conditioner Inner Filter – Replace
- Engine – Check and Adjust
- Hydraulic Oil Tank Breather Filter – Replace
- Hydraulic Oil Return Filter – Replace
- Fuel Filter – Replace
- Pre Fuel Filter and Water Separator – Replace
- Fuel Cap Filter – Change
- Drive Belt – Check
- 1,500 Hour / 9 Month Service
- Perform All Daily, 50, 250 and 500 Hour Service Checks
- Axle Differential And Planetaries Oil – Change
- 2,000 Hour / Yearly Service
- Perform All Daily, 50, 250, 500 and 1,000 Hour Service Checks
- Transmission Oil and Filter – Drain, Replace
- Air Cleaner Inner / Outer Filter – Replace
- Coolant – Change
- Hydraulic Oil and Oil Suction Strainer – Replace, Clean
- Oil Bath Precleaner (If Equipped) – Clean
- Brakes – Bleed
- Brake Accumulator – Check
- Axle Brake Disk – Check
- Steering, Brake, Driveshaft, Engine, and Fuel System – Check
- 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
- 4,500 Hour / 2 Year Service
- DEF (AdBlue®) Breather Filter – Replace
- DEF (AdBlue®) Filter – Replace
- 8,000 Hour / 4 Year Service
- 12,000 Hour / 6 Year Service
- Hose In-service Lifetime Limit (European Standard ISO 8331 and EN982 CEN)
- Electrical System
- Engine Cooling System
- General
- Antifreeze Concentration Tables
- Table of Standards for Allowed Tap Water
- Handling of Accumulator
- Pilot Accumulator
- Brake Accumulators
- LIS Accumulator
- Steering Accumulator
- Tires
- Inflating Tires
- Wheel Nut, Tightening Check
- Wheel Nut Torque
- Check Tire for Damage
- Recommended Air Pressure
- Severe Conditions Maintenance
- Transportation
- Transporting Machine
- Lifting Machine
- Specification
- General Specifications
- Working Range and Dimensions
- Working Capacities
- Bucket Capacity
- Stability Data (EN – and ISO – Norms)
- Approximate Weight of Workload Materials
- Index
Develon
