Part of the John Deere Repair Manuals.
Looking for the factory procedures to revive your D-Series machine? This 615-page John Deere 318D technical manual PDF (OEM #TM11398) breaks down the complete powertrain, hydrostatic systems, and electrical circuits for the 318D, 319D, 320D, and 323D Skid Steer Loaders. Inside, you get a massive diagnostic section packed with specific DTC resolutions for both the ECU and EMU, plus complete hydraulic schematics tracing every line from the high-flow pump to the self-leveling valves. Open straight to detailed wiring diagrams for the cab harness and step-by-step teardown procedures for the drive chains. Bring your hydraulic oil temperature to exactly 60°C (140°F) before running the two-speed shift test, and verify seat belt assemblies are replaced every 3 years. Stop wasting shop hours on forum guesswork. Download the file directly to your phone, use the bookmarks to find your schematic, and get your loader back in the dirt.
What's Inside This John Deere 318D to 323D Series Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 7-27 | Safety (Recognize Safety Information, Follow Safety Instructions, Operate Only If Qualified, Wear Protective Clothing, Avoid Unauthorized Machine Modifications, Inspect Machine, Stay Clear of Moving Parts, Avoid High-Pressure Fluids, Avoid High-Pressure Oils, Work in Ventilated Area, Prevent Fires, Prevent Battery Explosions, Handle Chemical Products Safely, Decommissioning: Proper Recycling and Disposal of Fluids and Components, Prepare for Emergencies, Clean Debris From Machine, Use Steps and Handholds Correctly, Start Only From Operator′s Seat, Use and Maintain Seat Belt, Prevent Unintended Machine Movement, Avoid Work Site Hazards, Keep Riders Off Machine, Avoid Backover Accidents, Avoid Machine Tip Over, Operating on Slopes, Operating or Traveling on Public Roads, Inspect and Maintain ROPS, Add and Operate Attachments Safely, Park and Prepare for Service Safely, Service Cooling System Safely, Remove Paint Before Welding or Heating, Make Welding Repairs Safely, Drive Metal Pins Safely, Service Tires Safely, Handle Cab Door Safely) |
| Diagnostic Trouble Codes (Dtcs) | 28-144 | Engine Control Unit Diagnostic Trouble Codes (Foot Throttle Sensor Out of Range High Diagnostic Procedure, Foot Throttle Sensor Out of Range Low Diagnostic Procedure, - Foot Throttle Sensor, Hand Throttle Sensor Out of Range High Diagnostic Procedure, Hand Throttle Sensor Out of Range Low Diagnostic Procedure, - Hand Throttle Sensor, - Engine Oil Pressure High, Engine Air Filter Switch Data Above Normal Diagnostic Procedure, Ambient Air Temperature Out of Range High Diagnostic Procedure, Ambient Air Temperature Out of Range Low Diagnostic Procedure, - Vehicle Identification Number, Fan Coil Output Driver Out of Range Low Diagnostic Procedure, Fan Coil Output Driver Out of Range High Diagnostic Procedure, Manual Purge Mode Switch Active Too Long Diagnostic Procedure, Fan Coil Output Driver Unknown Fault Diagnostic Procedure, Glow Plug Relay Output Out of Range Low Diagnostic Procedure, Glow Plug Relay Output Out of Range High Diagnostic Procedure, - Engine Protection Has Shut Down Engine, Starter Relay Output Out of Range Low Diagnostic Procedure, - Starter Relay Output Moderately High Value, Hydraulic Oil Temperature Data Above Normal Diagnostic Procedure, Hydraulic Oil Temperature Out of Range High Diagnostic Procedure, Hydraulic Oil Temperature Out of Range Low Diagnostic Procedure, Hydraulic Filter Restriction Switch Data Above Normal Diagnostic Procedure, No Emu Data on CAN Bus Abnormal Data Range Diagnostic Procedure, Fan Reversing Coil Output Out of Range Low Diagnostic Procedure, Fan Reversing Coil Output Out of Range High Diagnostic Procedure) |
| Operational Checkout Procedure | 145-159 | Group 10 - Operational Checkout Procedure, Key Switch on, Engine on Checks |
| Engine | 160-175 | Theory of Operation (John Deere Engine, Cold Start Operation) |
| Electrical System | 176-385 | System Information (Electrical: Diagram Information, Schematic Symbols) |
| Power Train | 386-397 | Theory of Operation (Power Train System Operation, Chain Case Operation, Drive Chain Operation, Drive Axle Operation) |
| Hydraulic System | 398-512 | Theory of Operation (Hydraulic System Operation, Hydraulic Oil Filter Manifold Operation, High Flow Pump Operation, If Equipped, Self Leveling Valve Operation, Hydraulic Pump Operation, Hydraulic Fan Operation, Hydraulic Control Valve Operation) |
| Hydrostatic System | 513-587 | Theory of Operation (Hydrostatic System Operation, Hydrostatic Pump Operation, Charge Pump Operation, Hydrostatic Motor Operation, Single Speed, Two Speed, Hydrostatic Control Valve Operation, Park Brake System Operation, Steering Control Operation) |
| Heating and Air Conditioning | 588-614 | Group 05 - Theory of Operation, Air Conditioning System Cycle of Operation, Group 15 - Diagnostic Information, Air Conditioner Runs Constantly, Too Cool Diagnostic Procedure, Group 25 - Tests, Refrigerant Cautions and Proper Handling, Visual Inspection of Components |
| Dealer Fabricated Tools | 615 | Group 99 - Dealer Fabricated Tools, DFT1325 Solenoid Power Harness |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Use and Maintain Seat Belt | 10 | p. 6 |
| Inspect hydraulic hoses periodically | at least once per year | p. 10 |
| Seat belt assembly replacement interval | every 3 years | p. 16 |
| Hydraulic oil temperature is below specification for two speed shift to occur | 318D and 320D machines only | p. 312 |
| Hydraulic Oil Temperature | 60°C 140°F | p. 360 |
| Engine Speed | Fast Idle | p. 360 |
| Park brake release pressure | 1400 kpa (14 bar) (200 psi) | p. 561 |
| Engine Coolant Temperature | 88–94°C | p. 170 |
| 318D | ||
| 318D Engine Speed Fast Idle | 2800 rpm | p. 170 |
| 320D | ||
| 320D Engine Speed Fast Idle | 2800 rpm | p. 170 |
| 318D, 319D (S.N. -203036) | ||
| 318D Turbocharger Boost Pressure | 122 kPa at 2600 rpm | p. 170 |
| 319D (S.N. 203037- ), 320D, 323D (S.N. 202965) | ||
| 320D Turbocharger Boost Pressure | 132 kPa at 2600 rpm | p. 170 |
John Deere 318D to 323D Series Common Problems This Manual Covers
John Deere 320D hydraulics lockup with parking brake unable to release, joystick not centered fault
Check the interlock logic sequence; the system reads joystick position before releasing the park brake. Center both joysticks fully and cycle the seat belt sensor. Test park brake release pressure at the test port; it should read 1724–2068 kPa (17.2–20.7 bar) (250–300 psi) per the spec on page 561. Replace the joystick sensor if pressure is correct but the brake stays locked.
Manual Section: No Hydraulic Functions Diagnostic ProcedureEngine power drops to 99% derate after five minutes of operation with further power loss
Pull codes through the diagnostic trouble code procedures starting; derate almost always traces to an engine air filter switch or hydraulic oil temperature sensor fault. Inspect the air filter housing for restriction and check the fuel filter for clogging. Verify ambient air temperature sensor readings are in range before clearing codes and retesting under load.
Manual Section: Diagnostic Trouble Codes (Dtcs)Engine hard to start and runs rough in cold weather, cranks a long time before catching
Work through the cold start diagnostic on page 167: confirm the engine software version, then check the cold start package and block heater operation. Drain water from the primary fuel filter and inspect the tank vent cap for blockage. Verify engine coolant temperature reaches 88-94°C at operating temperature per page 170 before condemning the glow plug relay.
Manual Section: Engine Hard to Start or Does Not Start When Cold Diagnostic Procedure p. 167Machine overheats with cooling fan running excessively at high RPM during normal operation
Follow the hydraulic fan system diagnostic procedure. Check hydraulic oil level, then measure charge oil pressure cold and at operating temperature; fan speed increases once hydraulic oil temperature climbs above the 43°C minimum listed on page 474. Inspect the fan drive motor for wear and clear debris blocking airflow through the oil cooler.
Manual Section: Hydraulic Fan System Malfunctions Diagnostic ProcedureOnly the right joystick responds; left stick, bucket, and boom functions are completely dead
Run the CAN diagnostics starting; a dead left joystick with locked brakes usually traces to a CAN bus fault rather than a mechanical block. Check CAN high and low wire voltage, confirm termination resistor readings, and test the controller fuse. Verify park brake release pressure reaches 1724–2068 kPa (17.2–20.7 bar) (250–300 psi) per page 561 before condemning the valve block.
Manual Section: Controller Area Network (CAN) DiagnosticsFrequently Asked Questions
How to clear John Deere 318D diagnostic trouble codes?
To clear stored diagnostic trouble codes (DTCs) from the Engagement and Monitor Unit (EMU), first access the service menu by pressing and holding the MENU button for 5 seconds. Then, work through to 'MAIN MENU CODES', select it, and proceed to 'CODES CLEAR' to clear the stored DTCs. The display will show 'CODES CLEARED' for 2 seconds before returning to the menu. p. 313
How to release hydraulic system pressure on a John Deere 318D?
To relieve trapped hydraulic system pressure, sit in the seat, lower the interlocking seat bar, and turn the key to the run position without starting the engine. Switch the park brake to the middle position to engage hydraulic functions, then raise and lower the interlocking seat bar. Finally, pull up and hold the boom release handle (123) to release pressure. p. 467
What is the replacement interval for the seat belt assembly?
The complete seat belt assembly should be replaced every 3 years, regardless of its appearance. This ensures continued safety and proper function of the restraint system. p. 16
What is the recommended hydraulic oil operating temperature?
The recommended hydraulic oil operating temperature for the machine is 43°C (110°F). This temperature ensures optimal performance and proper functioning of the hydraulic system. p. 462
How quickly can I access this John Deere 318D, 319D, 320D, 323D manual after?
A 615-page Technical Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Is this John Deere 318D, 319D, 320D, 323D Technical Manual printable?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Are there hydraulic schematics in this John Deere 318D, 319D, 320D, 323D manual?
A hydraulic system diagram for the John Deere 318D, 319D, 320D, 323D is included.
