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Service Engine


Engine Warranty Maintenance Statement

Maintenance, repair, or replacement of the emission control devices and systems on this engine, which are being done at the customer’s expense, may be performed by any non-road engine repair establishment or individual. Warranty repairs must be performed by an authorized John Deere dealer.

Avoid Fumes

c CAUTION: Avoid injury! Engine exhaust fumes contain carbon monoxide and can cause serious illness or death.

• Move the machine to an outside area before running the engine.

• Do not run an engine in an enclosed area without adequate ventilation.

• Connect a pipe extension to the engine exhaust pipe to direct the exhaust fumes out of the area.

• Allow fresh outside air into the work area to clear the exhaust fumes out.

Engine Oil



Use oil viscosity based on the expected air temperature range during the period between oil changes.

The following John Deere oils are preferred:

• PLUS-50™

• TORQ-GARD SUPREME™

Other oils may be used if above John Deere oils are not available, provided they meet the following specification:

• API Service Classification CH or higher

• ACEA Specification E3 or higher

Checking Engine Speeds

Check engine speeds when engine is warmed up and not under load.

Observe Tachometer.

Slow idle (no load) 1575 rpm

Fast idle (no load) 3370 rpm

If above engine speeds are not to specifications, see your John Deere dealer.

Checking Engine Oil Level

IMPORTANT: Avoid damage! Failure to check the oil level regularly could lead to serious engine problems if oil level is low:

• Check oil level before operating.

• Check oil level when the engine is cold and not running.

• Keep level between the Full and the Add marks.

• Shut off engine before adding oil.


NOTE: Check oil twice a day if you run engine over 4 hours in a day.

Make sure engine is cold when checking engine oil level.

1. Park the machine safely. (See Parking Safely in the SAFETY section.)

IMPORTANT: Avoid damage! Dirt and contamination can enter engine when checking oil level. Clean area around dipstick before loosening or removing.



MX46343

Picture Note: 1023E shown. 1026R similar.

2. Remove dipstick (A), located at the right side of the engine. Wipe with a clean cloth.

3. Install dipstick.

4. Remove dipstick.


MIF

5. Check oil level on dipstick. Oil level should be between levels (B) and (C) on dipstick.

6. If oil level is low:

a. Raise hood.

b. Remove right side panel.


MX46361

Picture Note: 1023E shown. 1026R similar.

c. Remove either oil fill cap (D).

d. Add recommended engine oil until level is within operating range on dipstick. Do not overfill.

e. Install dipstick.

7. If oil is above top hole mark on the dipstick, drain to proper level.

8. Install right side panel if removed.

9. Lower hood if opened.

Changing Engine Oil and Filter

IMPORTANT: Avoid damage! Change the oil more often if the vehicle is used in extreme conditions:

• Extremely dusty conditions.

• Frequent slow or low-speed operation.

• Frequent short trips.


1. Run engine to warm the oil.

2. Park machine safely. (See Parking Safely in the SAFETY section.)

3. Raise hood.

4. Remove right side panel.


MX46341


MX46361

Picture Note: 1023E shown. 1026R similar.

5. Place container under oil drain plug (A) located on under side of engine.

6. Remove drain plug.

7. Wipe dirt from around oil filter (B).

8. Turn filter counter-clockwise to remove.

9. Put a light coat of clean engine oil on the gasket of new filter.

10. Install replacement oil filter by turning filter clockwise until gasket contacts filter base. Tighten additional one half turn.

11. Install drain plug. Do not overtighten.

12. Remove either oil fill cap (C).

13. Add 2.7 L (2.9 qt) engine oil.

14. Install oil fill cap.

15. Start and run engine at idle to check for leaks.

16. Stop engine. Fix any leaks before operating.

17. Check engine oil level. Add oil if necessary.

18. Install right side panel.

19. Lower hood.

Cleaning Dust Unloading Valve

IMPORTANT: Avoid damage! Do not operate engine without air cleaner element and rubber dust unloading valve installed.


1. Park the vehicle safely. (See Parking Safely in the SAFETY section.)

2. Allow engine to cool.

3. Access the engine compartment.


MX22502

4. Squeeze dust unloading valve (A) to clean. Remove and replace if damaged.

Checking Air Restriction Indicator (1026R only)

1. Park the machine safely. (See Parking Safely in the SAFETY section.)

2. Raise hood.


MX27907

3. Check the service window (A) on the indicator.

• Change the air filter if the service window is red.

• Press the top of the indicator housing (B) to reset the indicator after service.

4. Lower hood.

Servicing Air Filter Elements

c CAUTION: Avoid injury! Touching hot surfaces can burn skin. The engine, components, and fluids will be hot if the engine has been running. Allow the engine to cool before servicing or working near the engine and components.

IMPORTANT: Avoid damage! Dirt and debris can enter the engine through a damaged filter element:

• Do not wash paper element.

• Do not attempt to clean paper element by tapping against another object.

• Do not use pressurized air to clean element.

• Replace element only if it is very dirty, damaged or the seal is cracked.


Servicing Primary Air Filter Element:

1. Park machine safely. (See Park Safely in the SAFETY section.)

2. Allow engine to cool.

3. Raise hood.


MX46299

4. Release latches (A) and remove cover (B).


MX46300

5. Remove and discard primary element (D). Replace with a new primary filter element.

6. Install cover (B) with rubber dust unloading valve (C) pointing downward.

7. Hook latches (A) onto cover.

8. Lower hood.

Servicing Secondary Air Filter Element:

IMPORTANT: Avoid damage! Secondary element does not need routine replacement. Visually inspect it without removing from canister. Do not attempt to clean secondary element. If secondary element is replaced, install new primary and secondary element immediately to prevent dust from entering air intake system.


1. Remove cover.

2. Remove and discard primary air filter element.


MX46301

3. Remove and discard secondary air filter element (E). Replace with a new secondary air filter element.

4. Install new primary air filter element.

5. Install cover (B) with rubber dust unloading valve (C) pointing downward.

6. Hook latches (A) onto cover.

7. Lower hood.

Checking Air Filter Intake Hoses and Clamps

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Raise hood.

NOTE: Visually inspect hose for cracks and wear. Squeeze hose to check for deterioration. Hose should not be hard and brittle, nor soft or swollen.


MX46293

3. Check air intake hose (A).

4. Tighten upper (B) and lower (C) clamps if necessary.

5. Lower hood.

Service Cooling System Safely


TS281

c CAUTION: Avoid injury! The radiator will be hot and can burn skin. Built-up pressure may cause explosive release of coolant when the radiator cap is removed:

• Shut off the engine and allow to cool.

• Do not remove the cap unless the radiator and the engine are cool enough to touch with bare hands.

• Slowly loosen the cap to the first stop to release all pressure. Then remove the cap.

Recommended Engine Coolant

IMPORTANT: Avoid damage! Using incorrect coolant mixture can cause overheating and damage to the radiator and engine:

• Do not operate engine with plain water.

• Do not exceed a 50% mixture of coolant and water.

• Aluminum engine blocks and radiators require approved ethylene-glycol based coolant.


The engine cooling system is filled to provide year-round protection against corrosion and cylinder liner pitting, and winter freeze protection to -37 degrees C (-34 degrees F). If protection at lower temperatures is required, consult your John Deere dealer for recommendations.

The following coolants are preferred:

• John Deere COOL-GARD™ II Premix

• John Deere COOL-GARD™ Premix

• John Deere COOL-GARD™ PG Premix

John Deere COOL-GARD™ II Premix and John Deere COOL-GARD™ Premix are available in a concentration of 50% propylene glycol.

John Deere COOL-GARD™ PG Premix is available in a concentration of 55% propylene glycol.

Additional recommended coolants:

• John Deere COOL-GARD™ II Concentrate in a 40% to 60% mixture of concentrate with water.

• John Deere COOL-GARD™ Concentrate in a 40% to 60% mixture of concentrate with water.

If the recommended coolants are unavailable, use an ethylene glycol or propylene glycol base coolant that meets the following specification:

• ASTM D3306 prediluted (50%) coolant.

• ASTM D3306 coolant concentrate in a 40% to 60% mixture of concentrate with water.

Check container label before using to be sure it has the appropriate specifications for your machine. Use coolant with conditioner or add conditioner to coolant before using.

Water Quality

• Water quality is important to the performance of the cooling system. Distilled, deionized, or demineralized water is recommended with ethylene glycol base engine coolant concentrate.

Servicing Cooling System

Checking Cooling System

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Allow engine to cool.

3. Raise hood.


MX35598

4. Check recovery tank (A) coolant level:

• If engine is warm, coolant level should be between the FULL line (B) and the LOW line (C).

• If engine is cold, coolant level should be at the LOW line (C) on the recovery tank.

5. Remove recovery tank cap (D) if needed to add coolant.

6. Add recommended coolant.

7. Install recovery tank cap.

8. Lower hood.

Draining Cooling System

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Allow engine to cool.

3. Raise hood.


MX46344

4. Slowly open radiator cap (A) to the first stop to release all pressure.

5. Close radiator cap tightly.

6. Remove radiator screen, remove radiator drain plug (B) and drain coolant.


MX46343

Picture Note: 1023E shown. 1026R similar.

7. Remove engine block drain plug (C) and drain all coolant.

8. When coolant drains from the recovery tank, remove the radiator cap.

9. Install radiator and install engine block drain plugs.

10. Flush cooling system.

Flushing Cooling System

1. Fill cooling system with clean water and John Deere Cooling System Cleaner, or John Deere Cooling System Quick Flush or an equivalent. Follow directions on the container.

2. Install and tighten radiator cap.

3. Start and run engine until it reaches operating temperature.

4. Stop engine.

5. Remove radiator and engine block drain plugs.

6. Drain cooling system immediately before rust and dirt settle.

7. Install radiator and engine block drain plugs.

Filling Cooling System

IMPORTANT: Avoid damage! Using incorrect coolant mixture can damage the radiator:

• Do not operate engine with plain water.

• Do not exceed a 50% mixture of coolant and water.

• Aluminum engine blocks and radiators require approved ethylene-glycol based antifreeze.


NOTE: John Deere COOL-GARD coolant is recommended when adding new coolant to the cooling system.

Follow the directions on the container for correct mixture ratio.

1. Allow radiator to cool.

2. Fill cooling system.

• Cooling system capacity is 3.7 L (3.9 qt).

3. Install and tighten radiator cap.

4. Run engine until it reaches operating temperature.

5. Stop engine.

6. Check recovery tank coolant level and add coolant if necessary

7. Lower hood.

Checking Radiator Hoses and Clamps

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Raise hood.

3. Remove right side panel.

NOTE: Visually inspect hoses for cracks and wear. Squeeze hoses to check for deterioration. Hoses should not be hard and brittle, nor soft or swollen.


MX46302

4. Check upper radiator hose (A) for damage or cracking. Replace if necessary.

5. Check hose clamps (B) as needed.

6. Check lower radiator hose (C) for damage or cracking. Replace if necessary.

7. Check hose clamps (D) as needed.

8. Install right side panel.

9. Lower hood.

Cleaning Radiator Cooling Screen and Fins

c CAUTION: Avoid injury! Compressed air can cause debris to fly a long distance.

• Clear work area of bystanders.

• Wear eye protection when using compressed air for cleaning purposes.

• Reduce compressed air pressure to 210 kPa (30 psi).

IMPORTANT: Avoid damage! The radiator cooling screen must be clean to prevent engine from overheating and to allow adequate air intake.


Cleaning Radiator Cooling Screen

IMPORTANT: Avoid damage! Reduced air intake can cause overheating. Keep radiator cooling fins clean.

Do not use pressure washers to clean radiator cooling fins. The force produced by pressure washers will damage the radiator and cooling fins.

Reduce compressed air pressure to 210 kPa (30 psi) when cleaning radiator and cooling fins. Spray compressed air straight into radiator. Do not spray radiator on an angle or cooling fins will be bent.


1. Park machine safely. (See Parking Safely in the SAFETY section.) Allow engine to cool.

2. Raise hood.


MX46303

Picture Note: Screen shown partially removed.

3. Lift tabs (A) to slide radiator screen (B) up out of retaining slot.

4. Clean screen with compressed air, brush or cloth.

5. Install screen in front of radiator.

6. Lower hood.

Cleaning Radiator Cooling Fins

IMPORTANT: Avoid damage! Reduced air intake can cause overheating. Keep radiator cooling fins clean.

Do not use pressure washers to clean radiator cooling fins. The force produced by pressure washers will damage the radiator and cooling fins.

Reduce compressed air pressure to 210 kPa (30 psi) when cleaning radiator and cooling fins. Spray compressed air straight into radiator. Do not spray radiator on an angle or cooling fins will be bent.


1. Park machine safely. (See Parking Safely in the SAFETY section.) Allow engine to cool.

2. Raise hood.

3. Remove radiator screen.


MX46304

4. Remove all dirt and debris from fins at front (A) and rear of radiator including fan shroud using compressed air or water.

5. Install radiator screen.

6. Lower hood.

Servicing the Alternator Belt

c CAUTION: Avoid injury! Rotating parts can catch fingers, loose clothing, or long hair. Wait for engine and all moving parts to stop before leaving operator’s station to adjust or service machine.

Checking Belt Tension

1. Park machine safely. (See Parking Safely in the SAFETY section.) Allow engine to cool.

2. Raise hood.

3. Remove left side panel.


MX46305

4. Apply moderate thumb pressure to belt (A) halfway between the pulleys. Belt should deflect inward approximately 9 mm (3/8 in.).

5. Adjust belt tension if deflection is more or less than specified.

Adjusting Belt Tension

1. Loosen adjusting bolt (B) and pivot bolt (C).

2. Apply outward pressure to alternator housing until tension is correct.

3. Tighten bolts (B) and (C).

4. Check belt tension.

5. Install left side panel.

6. Lower hood.

Replacing Belt

NOTE: Replace alternator belt if excessive wear, damage or stretching is detected.

1. Park machine safely. (See Parking Safely in the SAFETY section.) Allow engine to cool.

2. Raise hood.

3. Remove left side panel.

4. Loosen adjusting bolt (B) and pivot bolt (C).

5. Apply inward pressure to alternator housing.

6. Remove belt from alternator sheave, fan sheave and crankshaft sheave.

7. Route belt over fan and remove.

8. Install new belt over fan and onto sheaves.

9. Apply outward pressure to alternator housing until tension is correct.

10. Tighten bolts (B) and (C).

11. Check belt tension. Adjust as necessary.

12. Install right side panel.

13. Lower hood.

Checking and Cleaning Fuel Filter Sediment Bowl and Replacing Filter

c CAUTION: Avoid injury! Fuel vapors are explosive and flammable:

• Do not smoke while handling fuel.

• Keep fuel away from flames or sparks.

• Shut off engine before servicing.

• Cool engine before servicing.

• Work in a well-ventilated area.

• Clean up spilled fuel immediately.

NOTE: Change filter when fuel level is low.

Checking Sediment Bowl

1. Park machine safely. (See Parking Safely in the SAFETY section.) Allow engine to cool.

2. Check fuel sediment bowl. If water and deposits are detected, remove bowl and replace fuel filter.

Cleaning Sediment Bowl and Replacing Fuel Filter


MX46343

1. Move the fuel shut-off valve (A) to the “C” (closed) position (B).

2. Position drain pan under fuel filter sediment bowl (C).

3. Turn locking collar (D) counterclockwise to remove bowl.

4. Remove and discard the fuel filter.

5. Clean bowl.

6. Install new filter to filter head.

7. Install sediment bowl and locking collar.

8. Open fuel shut-off valve.

NOTE: Fuel system is self bleeding.

9. Turn key to the ON position for 10-15 seconds before attempting to start, electric pump will purge air from sediment bowl.

Replacing Inline Fuel Filter

NOTE: Change filter when fuel level is low.



1. Inline fuel filter is located under left foot deck (A)

2. Position drain pan under fuel filter.



3. Clamp fuel line (B) between filter and tank to prevent fuel draining from fuel tank.

4. Remove two spring clamps (C).

NOTE: Flow direction arrow on filter body should point away from tank.

5. Remove old filter (D) and install new filter.

6. Replace two spring clamps.

7. Remove clamp used between filter and tank. Check for leaks.

Fuel Injection Pump

IMPORTANT: Avoid damage! Do not clean a warm or hot fuel injection pump with steam or water. Clean with compressed air if pump is not cooled.


NOTE: The fuel injection pump is calibrated by the engine manufacturer and should not require any adjustments.

If engine is hard to start, lacks power, or runs rough, see Troubleshooting Section of this manual.

After performing the check in the troubleshooting section and your engine is still not performing correctly, contact your John Deere dealer.

Fuel Injection Nozzles

IMPORTANT: Avoid damage! Do not service or remove fuel injection nozzles. Service life of injection nozzles may be shortened by overheating, improper operation, poor fuel quality, or excessive idling.


If injection nozzles are not working correctly or are dirty, engine will run poorly. See your John Deere dealer for service.

Cleaning Front Grille Screens

IMPORTANT: Avoid damage! Grille and side screens must be clean to prevent engine from overheating and to allow adequate air intake.


1. Check front grille screens for dirt, grass clippings and debris.

2. Raise hood and clean screens with a brush or cloth.

3. Lower hood.

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