John Deere

OMM145864

Issue I1

Lawn Tractors

LT150, LT160

PIN (125001-)

Introduction

Product Identification

Safety

Operating

Replacement Parts

Service Intervals

Service Lubrication

Service Engine

Service Transmission

Service Mower

Removing Mower

Installing Mower

Replacing Mower Drive Belt (38-Inch and 42C Decks)

Replacing Mower Drive Belt (Freedom 42 Deck)

Adjusting Mower Timing Belt Tension (Freedom42 Deck)

Replacing Mower Timing Belt And Adjusting Blade Timing (Freedom42 Deck)

Adjusting Spindle Brakes

Checking for Bent Mower Blades

Servicing Mower Blades (38-Inch and 42C Decks)

Servicing Mower Blades (Freedom42 Deck)

Sharpening Blades

Balancing Blades

Service Electrical

Service Miscellaneous

Troubleshooting

Storage

Assembly

Specifications

Warranty

John Deere Quality Statement

Service Record

All Manuals Close Window

Service Mower


Removing Mower

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

2. Allow engine and muffler to cool completely.

c CAUTION: Avoid injury! Rotating blades are dangerous. Before adjusting or servicing mower:

Disconnect spark plug wire(s) to prevent engine from starting accidently.

Always wear gloves when handling mower blades or working near blades.

3. Adjust mower cutting height to lowest position.

4. Move mower engagement lever to stop position.

5. Put wood blocks under each side of mower deck.

c CAUTION: Avoid injury! If lift pedal is spring-assisted it may have unexpected movement.

Lock lift pedal when installing or removing mower deck.

NOTE: If you have a lift assist installed on your machine, you may need to lower deck and then pull lift pedal back by hand to lock the lift lever.

6. Lower mower deck onto blocks and lock lift pedal.


MX11142b

Picture Note: View from beneath left side of tractor looking across mower deck, up, and toward rear

7. Remove spring locking pin (A) and washer (B) from adjustment pin (C) on end of PTO engagement rod (D).

8. Remove adjustment pin from arm hole (E) and place PTO engagement rod (D) on mower deck.


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9. Remove belt from engine drive sheave (F) and belt guides (G).


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10. Remove spring locking pin (H) from front draft rod (I).


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11. Remove front draft rod (I) from hole in tractor bracket (J) and from mower brackets (K).


MX11179


MX11140

Picture Note: Close-up of draft arm and J-pin

12. Pull and rotate J-pin (L) to release and move draft arm (M) away from deck bracket (N). Repeat on other side.

13. Raise draft arms to transport position:

a. Pull and hold lift pedal by hand.

b. Unlock lift latch handle.

c. Push down and hold lift pedal.

d. Pull up latch handle to lock draft arms in transport position.

14. Remove wood blocks from both sides and slide mower out from under tractor.

Installing Mower

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

2. Allow engine and muffler to cool completely.

3. Adjust mower cutting height to lowest position.

c CAUTION: Avoid injury! Rotating blades are dangerous. Before adjusting or servicing mower:

Disconnect spark plug wire(s) to prevent engine from starting accidently.

Always wear gloves when handling mower blades or working near blades.


MX11141

Picture Note: J-pin pulled back to show hole alignment for draft arm and deck bracket

4. Slide mower deck, guide wheels in front, under tractor and line up deck bracket (A) with draft arm (B).

5. Put wood blocks under each side of mower deck.

6. Unlock lift latch handle.

c CAUTION: Avoid injury! If lift pedal is spring-assisted it may have unexpected movement.

Lock lift pedal when installing or removing mower deck.

7. Pull lift pedal by hand to lower draft arms. Hold pedal securely and lock lift latch handle.


MX11140

8. Pull back J-pin (C) and insert through deck bracket (A) and draft arm (B). Make sure pin installs completely through deck bracket.


MX11178a

9. Install front draft rod (D) into hole in tractor bracket (E) and then into mower bracket (F). Make sure nut and rounded bushing are on front side of tractor bracket.


MX11177

10. Install spring locking pin (G) with loop of pin hanging down.

IMPORTANT: Avoid damage! The belt will be damaged if installed wrong. Route the belt properly through belt guides. See belt routing label on deck.



MX11176

11. Put mower drive belt on engine drive sheave (H) and route through both belt guide loops (I). Make sure belt is on all sheaves and idlers and is inside all belt guides, front and rear.

12. Remove wood blocks from both sides of mower.

IMPORTANT: Avoid damage! If the mower engagement rod is not adjusted properly, the mower belt may slip or drag on blade sheave resulting in belt damage.


NOTE: Make sure:

Mower is at lowest possible cutting height

Mower is at mowing position

Mower engagement lever is pulled back into stop position

Gauge wheels are not touching the ground.


MX11142b

Picture Note: View from beneath left side of tractor looking across mower deck, up and toward rear

13. Move PTO engagement rod (J) over brakeshaft (K) and align adjustment pin (L) with hole in tractor arm (M).

14. If pin (L) does not line up, loosen lock nut (N) and turn pin until pin slips freely into hole. Tighten lock nut.

15. Insert adjustment pin into hole in tractor arm.

16. Install washer (O) and spring locking pin (P) to fasten adjustment pin to arm.

17. Level mower.

Replacing Mower Drive Belt (38-Inch and 42C Decks)

NOTE: In this procedure the mower deck is removed for easier access.

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

2. Allow engine and muffler to cool completely.

3. Remove mower if desired.


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4. Remove three cap screws (A) or lock nuts (on 42C) and belt shield.

5. On 42C deck, remove wear plate beneath shield.


MX11144

6. Loosen rear idler (B) and tensioning sheave (C). On 42C deck, also loosen fixed idler (D).

7. Remove mower belt.

8. Clean top of mower.

9. Install new belt on mower as shown above.

10. Tighten rear idler and tensioning sheave.

11. On 42C deck, install wear plate and tighten fixed idler.

12. Install belt shield and fasten with three cap screws or lock nuts (on 42C).

13. Install mower deck and adjust mower engagement rod, if necessary.

Replacing Mower Drive Belt (Freedom 42 Deck)

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

2. Allow engine and muffler to cool completely.

3. Remove mower.


MX5359

4. Remove self-tapping cap screws (A).

5. Move brake assembly (B) away from sheave (C) and drive belt.

6. Loosen idler (D) and tensioning idler (E) just enough to slip belt past the guides.

7. Remove drive belt and clean top of mower.

8. Install new belt on mower deck as shown.

9. Tighten idler (D) and tensioning idler (E).

10. Align brake assembly (B) with right spindle sheave (C) and fasten with self-tapping cap screws (A). Brake pad must seat against top of sheave.

11. Install mower and adjust mower engagement rod, if necessary.

Adjusting Mower Timing Belt Tension (Freedom42 Deck)

1. Park machine safely.

2. Move lift lever to mowing position and move to left side of mower.

NOTE: Mower timing belt cover can be unfastened and flipped open on the left side, exposing the tension adjustment mechanism, without having to remove the mower or the timing belt cover.


MX5360

Picture Note: Mower removed for photo clarity

3. Remove flange lock nut (A) to flip open left spindle cover.

4. Check timing belt for damage. If the belt is damaged, replace the timing belt. If not damaged, complete remaining steps to adjust belt.


MX5361

5. Remove top washer first, then loosen idler assembly center nut (B) one full turn only.


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6. Check that blades are timed properly (90 from each other). If blades are out of time, set blades to proper timing.


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7. Turn left spindle sprocket (C) to be sure belt is seated properly in the sprockets and idlers.

IMPORTANT: Avoid damage! Incorrect belt tensioning can cause belt damage. Do not over tighten belt tensioning spring assembly.


8. Loosen jam nut (D) and adjusting nut (E) so that there is a small air gap between washer (F) and mating surface of spring bushing (G).

9. Rotate adjusting nut (E) clockwise until washer (F) makes solid contact with the mating surface of spring bushing (G).

10. Tighten idler assembly center nut (B) to 87 Nm (64 lb-ft).

11. Tighten jam nut (D) against adjusting nut (E) to 27 Nm (20 lb-ft).

12. Turn left spindle sprocket (C) to be sure belt is seated properly in the sprockets and idlers.

NOTE: The position of the drain holes in the spindle sheave (A) and the indentations in the timing sprocket (M) are in alignment with the mower blades (K) and (L).


MX0236

13. Check that blades are timed properly (90 from each other). If blades are out of time, set blades to proper timing.

14. Install top washer on top of center nut (B) and close left spindle cover.

15. Fasten cover with flange lock nut and tighten to 14 Nm (10 lb-ft).

Replacing Mower Timing Belt And Adjusting Blade Timing (Freedom42 Deck)

IMPORTANT: Avoid damage! Damage may occur to the belt or blades after a major blade impact:

Check blades for damage and timing.

Check the timing belt for damage and proper tensioning.


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

2. Allow engine and muffler to cool completely.

3. Remove mower.

4. Remove mower drive belt.

c CAUTION: Avoid injury! Mower blades are sharp. Always wear gloves when handling mower blades or working near blades.

IMPORTANT: Avoid damage! Check blade bolt torque any time mower is removed.


5. Carefully hold blade with glove, use a hand torque wrench, and tighten bolt to 57 Nm (42 lb-ft).


MX5358

6. Move spindle brake assembly (A) and mower engagement rod assembly (B) back to clear timing belt cover (D).

7. Remove five flange lock nuts (C) and cover (D).


MX0234

8. Turn jam nut (E) and adjusting nut (F) counterclockwise to end of threaded rod, and remove tensioning spring assembly.


MX3866

9. Remove washer and center nut (G) and move fixed idler assembly (H) close to the spindle sprocket. Do not loosen other idler assembly hardware.

10. Raise idler assembly upward as you carefully remove timing belt from the left spindle sprocket.


MX3863

11. Remove spacer (I) located between fixed idler assembly plates and carefully pull belt from assembly.


MX3866

12. Loosen two belt guides (J) and rotate away from left sprocket.

13. Remove timing belt, replace if necessary.

IMPORTANT: Avoid damage! Mower blades can collide if not properly timed. Blades must be aligned perpendicular (90 ) to each other.


NOTE: The position of the drain holes in the spindle sheave (K) and the indentations in the timing sprocket (L) are in alignment with the mower blades (M) and (N).


MX0236

14. Position mower blades (M) and (N) 90 from each other.

IMPORTANT: Avoid damage! Handle timing belts with care.

Do not crimp.

Do not fold.

Do not twist.



M92926a M92927a


MX3866

15. Install new mower deck timing belt:

a. Route belt around right spindle sprocket (O) located under the mower drive belt sheave.


MX3863

b. Route belt around outside of idlers and then in between the fixed idlers (P), pulling a belt loop through the idler assembly.

c. Insert spacer (I) between fixed idler plates and idlers.

d. Install the fixed idler assembly on the stud of the left support plate as you wrap belt loop around left spindle sprocket (Q).


MX3866

16. Install washer and center nut (G) on fixed idler assembly. Leave nut loose at this time.


MX0238

Picture Note: Underside of deck shown for illustration only

17. Check that blades (M) and (N) are 90 from each other.

IMPORTANT: Avoid damage! Incorrect belt tensioning can cause belt damage. Do not over tighten belt tensioning spring assembly.



MX0234

18. Install tensioning spring assembly and adjust timing belt tension:

a. Align notch (R) in idler assembly with tab on spring bushing (S).

b. Rotate adjusting nut (F) clockwise until the washer (T) makes solid contact with the surface of the spring bushing (S).

c. Turn adjusting nut an additional 1/2 turn to allow for new belt stretch. Do not over tighten.

d. Rotate right spindle sheave clockwise and observe that belt is riding properly in sprockets and idlers.

e. Tighten jam nut (E) against adjusting nut.


MX3867

19. Tighten center nut (G) to 73 Nm (54 lb-ft).

20. Install top washer on top of center nut.


MX0235

21. Adjust belt guides:

IMPORTANT: Avoid damage! Check belt guide-to-sprocket rim clearance. Measuring clearance incorrectly can cause belt or blade damage.


a. Hold a 1 mm (0.039 in.) shim/gage between belt guides and sprocket rim, location (U), and rotate belt guides (J) clockwise against gage.

b. Tighten belt guide nuts to 24 Nm (18 lb-ft).


MX3861

Picture Note: Right spindle sheave removed for photo clarity

c. Remove gage. Clearance (V), one on each side, should be 1contact belt guide.


MX5358

22. Install timing belt cover (D) and fasten with five nuts (C). Tighten nuts to 14 Nm (10 lb-ft.).

23. Install mower drive belt.

24. Install mower and adjust mower engagement rod, if necessary.

Adjusting Spindle Brakes

c CAUTION: Avoid injury! Rotating blades are dangerous. Mower blades must stop within 5 seconds after mower is turned off. Check spindle brake measurement every 25 hours or once a year (whichever comes first).

NOTE: This procedure applies only to the 38 and 42C.

The Freedom42 mower has a self-adjusting spindle brake assembly - no adjustment is necessary.

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

2. Adjust mower cutting height to lowest position.

3. Lower deck.

4. Push mower engagement lever forward.

5. Remove belt shields.


BRAKEADJ

Picture Note: 38 deck used for illustration

6. Measure distance between brake pad surface (A) and pulley braking surface (B). Brake to pulley distance should be 2 - 3 mm (0.08 - 0.12 in.) at both spindles.


MIF

Turn adjusting nuts (C) on end of brake rods in correct direction to set brakes at proper distance from pulleys. Adjust at both spindles (D).

7. Install belt shields.

Checking for Bent Mower Blades

c CAUTION: Avoid injury! Mower blades are sharp. Always wear gloves when handling mower blades or working near blades.

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

2. Raise mower to transport position to access blades.


MX4897

Picture Note: Mower deck with side discharge used for illustration

3. Measure distance (A) between blade tip and flat ground surface.

4. Rotate blade 180 and measure distance between other blade tip and flat ground surface.

5. Install new blade if the difference between the two measurements is more than 3 mm (1/8 in.).

6. Repeat for all blades.

Servicing Mower Blades (38-Inch and 42C Decks)

c CAUTION: Avoid injury! Mower blades are sharp. Always wear gloves when handling mower blades or working near blades.

Removing Mower Blades

1. Raise mower deck to gain access to mower blades. If necessary, remove mower deck after allowing engine and muffler to cool completely.

2. Block mower blade with a piece of wood to prevent it from rotating.


M88119a

3. Loosen and remove cap screw (A), hardened washer (B), blade washer (C) and blade (D).

4. Inspect blades; sharpen, balance or replace blades as necessary.

Installing Mower Blades

NOTE: Do not lubricate cap screw.

1. Check that deflector cup (A) is properly seated between mower spindle and blade (B).


MIF

2. Position mower blade (B) with the cutting edge towards the ground onto the mower spindle.

3. Install blade washer (C) with cup side toward the blade.

4. Install hardened washer (D).

5. Install and hand tighten cap screw (E) until mower blade is in full contact with spindle.

6. Block mower blade with a piece of wood to prevent rotating and tighten cap screw to 53 Nm (39 lb-ft.).

Servicing Mower Blades (Freedom42 Deck)

c CAUTION: Avoid injury! Service mower blades safely.

Disconnect spark plug wires or negative (-) battery cable to prevent accidental startup.

Mower blades are sharp. Always wear gloves when handling or working near blades.

Removing Mower Blades

1. Park machine safely. (See Parking safely in Safety section.)

2. Raise mower deck to gain access to mower blades. If necessary, remove mower deck.

3. Hold mower blade with glove to prevent blade from rotating.


M88112g

4. Loosen and remove bolt with washer (A), and blade (B).

5. Inspect blades; sharpen, balance or replace blades as necessary.

Installing Mower Blades

1. Check mower to be sure you are installing the blades on the correct side. Right and left sides are marked on rear draft brackets of mower deck.


MX0238

There are direction arrows located on each outside edge of the mower. There is a right and a left side blade. The blades are marked for identification.

2. Check that deflector cup (A) is properly seated between mower spindle and blade.


M88112g

3. Position mower blades (B), with the cutting edge towards the ground, onto the mower spindle and align key on bottom of spindle with slot in blade.

IMPORTANT: Avoid damage! Improperly installed blades can loosen during operation. Do not lubricate or use power tools when installing the blade bolt or the bolt will be ineffective.

Use a hand torque wrench and tighten bolts to blade bolt torque of: 57 Nm (42 lb-ft.)


4. Install and hand tighten bolt with washer (C) until mower blade is in full contact with spindle.

5. Hold mower blade with glove to prevent rotating and tighten bolts to 57 Nm (42 lb-ft.).

6. Check mower deck timing and adjust if necessary.

Sharpening Blades

c CAUTION: Avoid injury! Mower blades are dangerous!

Always wear gloves while working on blades.

Always wear safety eye protection when grinding.

Sharpen blades with grinder, hand file, or electric blade sharpener.


MX8333

Keep original bevel (A) when grinding.

Blade should have 0.40 mm (1/64 in.) cutting edge (B) or less.

Balance blades before installing.

Balancing Blades

c CAUTION: Avoid injury! Mower blades are sharp. Always wear gloves when handling mower blades or working near blades.

1. Clean blade.


M61524

2. Put blade on nail in a vise. Turn blade to horizontal position.

3. Check balance. If blade is not balanced, heavy end of blade will drop.

4. Grind bevel of heavy end. Do not change blade bevel.