How Checking John Deere Tractor 100 Series Spark Plug

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

1. Let engine cool.
2. Lift hood.

Picture Note: Twin cylinder engine shown.

4 Disconnect spark plug wire(s) (A), one on each side on V-twin engines.

5 Remove spark plug(s).

6 Clean spark plug carefully with a wire brush.

7 Inspect spark plug for:

a Cracked porcelain.

b Pitted or damaged electrodes.

c Other wear or damage.

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8 Replace spark plug as necessary.

 

9 Check plug gap (B) with a wire feeler gauge. To change gap, move the

outer electrode.

Gap must be 0.76 mm (0.030 in.)

outer electrode.

Gap must be 0.76 mm (0.030 in.).

10 Install and tighten spark plugs to 20 N•m (15 lb-ft).

11 Connect spark plug wire(s) and lower hood.

03.2024 John Deere Service Advisor 5.3.235 AG/CF Diagnostic Software

How Checking and Cleaning John Deere Tractor 100 Series Engine Air Cleaner Elements s (LA155, LA165 and LA175)

 

1. Park machine safely. (See Parking Safely in the SAFETY section.)
2. Let engine cool.
3. Lift hood.
4. Clean dirt and debris from the air cleaner cover.

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5  Loosen two knobs (A) and remove cover (B).

IMPORTANT:

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.

03.2024 John Deere Service Advisor 5.3.235 AG/CF Diagnostic Software

6 Pull filter assembly from air cleaner base (C). Inspect the foam

precleaner (D) without removing it. If the foam precleaner is dirty:

a.Remove it from the paper filter carefully.

b.Wash precleaner in a solution of warm water and liquid detergent. Do

not use oil.

c.Rinse precleaner thoroughly. Squeeze out excess water in a dry cloth

until precleaner is completely dry.

7 Inspect the paper filter element (E). If the paper filter element is

damaged or dirty, replace with new filter.

8 Clean air cleaner base very carefully, preventing any dirt from falling into

carburetor.

9 Install foam precleaner on paper filter element.

10 Install new filter assembly back onto air cleaner base.

11 Install air cleaner cover and tighten two knobs.

12 Lower hood.

John Deere CAN and Connectivity Health Wizard 1.21

How Checking and Cleaning John Deere Tractor 100 Series Engine Air Cleaner Elements (LA125)

This article explains how to inspect and clean the engine air filter element on a John Deere 100 Series tractor (LA125)

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

 

2. Let engine cool. 

 

3. Lift hood. 

 

4. Clean dirt and debris from the air cleaner cover.

  

  

5. Loosen two knobs (A) and remove cover (B).

 

03.2024 John Deere Service Advisor 5.3.235 AG/CF Diagnostic Software

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.

  

6. Pull filter assembly from air cleaner base (C). Inspect the foam

precleaner (D) without removing it. If the foam precleaner is dirty:

a.Remove it from the paper filter carefully.

b.Wash precleaner in a solution of warm water and liquid detergent. Do

not use oil.

c.Rinse precleaner thoroughly. Squeeze out excess water in a dry cloth

until precleaner is completely dry. 

 

7. Inspect the paper filter element (E). If the paper filter element is

damaged or dirty, replace with new filter. 

 

8. Clean air cleaner base very carefully, preventing any dirt from falling into

carburetor. 

 

9. Install foam precleaner on paper filter element. 

 

10. Install new filter assembly back onto air cleaner base. 

 

11. Install air cleaner cover and tighten two knobs. 

 

12. Lower hood.

 

   John Deere CAN and Connectivity Health Wizard 1.21

How Checking and Cleaning John Deere Tractor 100 Series Engine Air Cleaner Elements (LA135 and LA145)

 

1. Park machine safely. (See Parking Safely in the SAFETY section.)
2. Let engine cool.
3. Lift hood.
4. Clean dirt and debris from the air cleaner cover.

03.2024 John Deere Service Advisor 5.3.235 AG/CF Diagnostic Software

t1

5 Loosen four knobs (A) and remove cover.

IMPORTANT: Avoid damage! To prevent engine damage, do not

allow any foreign objects to fall into the carburetor air intake.

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6 Do not drop anything into the carburetor air intake (B). If anything falls

into the carburetor air intake it must be removed.

7 Lift out filter cartridge (C) and inspect it for damage.

 

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 againstanother object.

• Do not use pressurized air to clean element.
• Replace element only if it is very dirty, damaged or the seal is cracked.

 

• 8Inspect the foam precleaner (D) without removing it. If the foam

precleaner is dirty:

a.Remove it from the filter carefully.

b.Wash precleaner in a solution of warm water and liquid detergent.

c.Rinse precleaner thoroughly. Squeeze out excess water in a dry cloth

until precleaner is completely dry.

9  Clean air cleaner housing carefully. Prevent any dirt from falling into

carburetor.

10 Install foam precleaner mesh side up.

11 Install cartridge. Make sure cartridge and seal are properly seated and

sealing the carburetor air intake area.

12 Install air cleaner cover and tighten knobs. Do not overtighten.

13 Lower hood.

John Deere CAN and Connectivity Health Wizard 1.21

How Cleaning Air Cleaner John Deere Tractor 100 Series Engine Air Cleaner Elements (LA105 and LA115)

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

 

2. Let engine cool. 

 

3. Lift hood. 

 

4. Clean dirt and debris from the air cleaner cover.

03.2024 John Deere Service Advisor 5.3.235 AG/CF Diagnostic Software

 

 

  

5. Lift latch (A) to unlock cover (B). Lift cover forward and remove.

 

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.

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6. Carefully remove and inspect the paper filter element (C). If the paper

filter element is damaged or dirty, replace with new filter. 

 

7. Inspect the foam precleaner (D) without removing it. If the foam

precleaner is dirty:

a.Remove it from the paper filter carefully.

b.Wash precleaner in a solution of warm water and liquid detergent. Do

not use oil.

c.Rinse precleaner thoroughly. Squeeze out excess water in a dry cloth

until precleaner is completely dry

 

8. Clean air cleaner base very carefully, preventing any dirt from falling into

carburetor. 

 

9. Install foam precleaner on paper filter element. 

 

10. Install new paper filter element. 

 

11. Install air cleaner cover and push latch down to lock. 

 

12. Lower hood.

 

 John Deere CAN and Connectivity Health Wizard 1.21

How CleaningJohn Deere Tractor 100 Series Engine Air Intake Screen and Fins

 

CAUTION: Avoid injury! Compressed air can cause debris

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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! An obstructed air intake screen can

cause engine damage due to overheating. Keep air intake screen

and other external surfaces of the engine, including cooling fins,

clean at all times to allow adequate air intake.

03.2024 John Deere Service Advisor 5.3.235 AG/CF Diagnostic Software

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

2 Lift hood.

   Picture Note: Twin cylinder engine shown.

3 Clean air intake screen (A), cooling fins and external surfaces with rag,

brush, vacuum or compressed air.

4 Lower hood.

 

How to Change the Oil and Filter on a John Deere Tractor 100 Series Engine

 

• 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.

03.2024 John Deere Service Advisor 5.3.235 AG/CF Diagnostic Software

1. Run engine to warm oil.
2. Park machine safely. (See Parking Safely in the SAFETY section.)
3. Lift hood.

Picture Note: Twin cylinder engine shown.

4  Put drain pan under drain valve (A).

5  Rotate and remove drain cap (B) and drain oil into oil drain pan. Allow

oil to drain completely.

6 Remove dipstick (C).

t2

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Picture Note: Twin cylinder engine shown.

7 Replace oil filter (D), if equipped.

a.Wipe dirt from around oil filter.

b.Place a drain pan or funnel under filter tray.

c.Remove old filter and filter gasket and dispose of properly. Wipe up

any spilled oil.

d.Put a light coat of fresh, clean oil on the new filter gasket.

e.Install replacement oil filter by turning oil filter to the right (clockwise)

until the rubber gasket contacts filter base. Tighten filter an additional

one-half turn.

8 Install drain cap

IMPORTANT: Avoid damage! Do not overfill. Overfilling can cause

smoking, hard starting, fouling of spark plug, and oil saturation of

air filter.

9 Add oil no higher than FULL mark on dipstick. Use approximately the

amount of oil listed in the Specifications section. Do not overfill.

10 Install dipstick.

11 Start and run engine at idle to check for leaks. Stop engine. Fix any

leaks before operating.

12 Check oil level. Add oil if necessary

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How to Check Engine Fluid Levels (John Deere Tractor 100 Series Engine Maintenance Procedure 1)

 Engine Oil 

 

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Use oil viscosity based on the expected air temperature range during the 

 

period between oil changes.

 

    

The following John Deere oils are preferred: 

 

• TURF-GARD™ 

 

• PLUS- 4™ 

 

 

Other oils may be used if above John Deere oils are not available, 

 

provided they meet the following specification: 

 

• API Service Classification SJ or higher

 

 

 

  03.2024 John Deere Service Advisor 5.3.235 AG/CF Diagnostic Software

Checking Engine Oil Level

 

IMPORTANT: Avoid damage! Failure to check the oil level

regularly could lead to serious engine problems if oil level is out

of the operating range:

• Check oil level before operating.

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

• Keep oil level between the dipstick 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 machine safely. (See Parking Safely in the SAFETY section.) 

 

2. Lift hood. 

 

3. Clean area around dipstick to prevent debris from falling into crankcase

 

  

 

 

Picture Note: Twin cylinder engine shown. 

  

4. Remove dipstick (A). Wipe with clean cloth. 

 

5. Install and tighten dipstick.

 

6. Remove dipstick. 

 

7. Check oil level on dipstick. Oil must be between ADD and FULL marks. 

 

8. If oil level is low, add oil to bring oil level no higher than FULL mark on 

 

dipstick. Do not overfill. 

 

9. Install and tighten dipstick. Lower hood.

 

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John-Deere 3029, 4039, 4045, 6059, 6068 Engines (Saran)-499999CD Disassembly

This article describes the disassembly of John-Deere 3029, 4039, 4045, 6059, 6068 Engines (Saran)-499999CD

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 ENGINE DISASSEMBLY SEQUENCE

The following sequence is suggested when complete

disassembly for overhaul is required. Refer to the

appropriate repair group when removing individual

engine components.

1. Drain all coolant and engine oil. Check engine oilfor metal contaminates (see Groups 25 and 30). 

 

2. Remove fan belts, fan, and alternator (seeGroup 30). 

 

3. Remove turbocharger (if equipped) and exhaust manifold (see Group 35). 

 

4. Remove rocker arm cover with vent tube. On engines having an Option Code label on rocker arm cover, be careful not to damage label (see Group 05). 

 

5. Remove water manifold with thermostats (see Group 30). 

6. Remove oil cooler piping and water pump (seeGroups 25 and 30).(Continued on next page) 

 

7. Remove dipstick, oil filter, and engine oil cooler.

Discard standard-flow oil cooler if oil contained metal

particles (see Group 25). 

 

8. Remove oil pressure regulating valve assembly(see Group 25).

 

9. Remove fuel filter, fuel transfer pump, and fuel lines (see Group 40). 

 

10. Remove injection lines, injection pump, andinjection nozzles (see Group 40). 

 

11. Remove starting motor. 

 

12. Remove rocker arm assembly and push rods.Keep rods in sequence (see Group 05). Check forbent push rods and condition of wear pad contactsurfaces on rockers. 

 

13. Remove cylinder head. Check piston protrusion.Verify piston height selection (see Groups 05 and10).

14. Remove cam followers. Keep in same sequence as removed (see Group 20).

03.2024 John Deere Service Advisor 5.3.235 AG/CF Diagnostic Software 

 

15. Remove oil pan (see Group 25). 

 

16. Remove flywheel and flywheel housing (see Group 15). 

 

17. Remove crankshaft pulley (see Group 15). 

 

18. Remove timing gear cover (see Group 20). 

 

19. Remove oil pump drive gear, outlet tube (and its O-ring in block) and pump body (see Group 25). 

 

20. Remove oil slinger, timing gears and camshaft.Perform wear checks (see  roup 20). 

 

21. Remove balancer shafts (4-cylinder only, if equipped), see Group 20. 

 

22. Remove engine front plate (see Group 20). 

 

23. Remove lube oil system by-pass valve (see  Group 25). 

 

24. Stamp cylinder number on rod (if required). Remove pistons and rods. Perform wear checks with  “PLASTIGAGE”. On 4 and 6-cylinder engines, remove  two at a time (see Group 10). 

 

25. Remove main bearings and crankshaft. Perform  wear checks with  PLASTIGAGE” (see Group 15). 

 

26. Remove cylinder liners and mark each one with  cylinder number from which removed (see Group 10). 

 

27. Remove piston cooling orifices (see Groups 10  and 15). 

 

28. Remove balancer shaft and camshaft bushings (if  equipped), see Group 20.

29. Remove cylinder block plugs and serial number plate (as required) when block is to be put in a “hot  tank” (see Group 10).   

30. Clean out liner bores (upper and lower areas)  with nylon brush (see Group 10).

 

31. Measure cylinder block (see Groups 10, 15, and  20)

 02.2024 John Deere Parts ADVISOR EPC(CF& AG& CCE)