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Service Mower


Installing or Removing Mower Drive Belt at Engine Drive Sheave (122 cm (48 in.) Deck)

NOTE: This procedure is for easy installing and removing.


MX10523Y


MX10520Y

1. Put lift lever in lowest position.

c CAUTION: Avoid injury! Idler arm is under load when removing or installing a new belt. Injury can occur if released suddenly. Keep hands and fingers from the surrounding area of the arm.

2. Put a 15mm closed wrench or a socket on the idler sheave nut (A), move idler sheave toward front of tractor and hold to release belt tension.

3. Install the belt on the drive sheave (B).

4. Release idler sheave to tighten belt.

5. Use same procedure to remove belt.

Removing Mower

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

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

3. Put lift lever in lowest position, bringing deck down onto blocks.

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

Disconnect spark plug wire(s) or battery negative (-) cable to prevent engine from starting accidently.

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


MX10517Y; MX7681

Picture Note: 107 cm (42 in.) only.

4. On machines with 107 cm (42 in.), disconnect PTO drive cable (A).

a. Remove spring locking pin (B), pull and hold PTO drive cable out, lift up and remove from bracket (C).

b. Remove cable spring (D) from idler sheave bracket (E).

c CAUTION: Avoid injury! Mower lift arms can pinch fingers. Lift arms are spring loaded and can snap back when deck is removed.

Lock lift lever before pulling pin to remove mower deck.


MX10516Y

5. Remove spring locking pins and washers (F) and disconnect rear draft arms (G), two on each side.


MX10521Y

Picture Note: 107 cm (42 in.) shown.

6. Remove spring locking pin and washer (H) and front draft rod (I) from mower deck bracket (J).

7. Remove mower drive belt from drive sheave (K).

8. Remove wood blocks from both sides and slide mower out from under the machine.

9. When operating the machine without the mower deck:

Remove rear draft arms and front draft rod from tractor and attach them to the mower deck.


MX10514

On 107 cm (42 in.) only: Push PTO drive cable into clip (L) and hook end of cable spring with hardware (M) into peg on left side of machine frame.

Installing Mower

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

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

Disconnect spark plug wire(s) or battery negative (-) cable to prevent engine from starting accidently.

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

2. Put lift lever in the transport position.

3. Slide mower under machine.

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

5. Put lift lever in lowest position.


MX10516Y

6. Fasten rear draft arms (A), two on each side, with washers and spring locking pins (B).

IMPORTANT: Avoid damage! To prevent clutch damage, make sure front draft rod is installed correctly. Secure rod with washer and spring locking pin on the left side of mower deck bracket.



MX10529AY

Picture Note: 107 cm (42 in.) used for photo purposes.

7. Install front draft rod (C) into mower deck bracket (D) and secure with washer and spring locking pin (E) on the left side of bracket as shown.

c CAUTION: Avoid injury! Idler arm is under load when removing or installing a new belt. Injury can occur if released suddenly. Keep hands and fingers from the surrounding area of the arm.


MX10520Y

Picture Note: 122 cm (48 in.) used for photo purposes.

8. Put mower drive belt on engine drive sheave (F).

On 122 cm (48 in.): Put a 15 mm closed wrench or a socket on the idler sheave nut, move idler sheave (G) and tensioning arm toward front of tractor and hold while installing belt on drive sheave.


MX10521Y

On 107 cm (42 in.): Make sure belt is routed through both belt guides (H).

9. Remove wood blocks from both sides of mower deck.

10. On machines with 107 cm (42 in.): Attach PTO drive cable.


MX7681; MX10517Y

Picture Note: 107 cm (42 in.) only.

a. Route cable under mower belt and brake rod and attach cable spring (I) to idler sheave bracket (J).

b. Pull out on cable (K), align black end of cable with slot in bracket (L) and release cable into slot. Secure with spring locking pin (M).

11. Level mower.

Replacing Mower Drive Belt (107 cm (42 in.) Deck)

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

Disconnect spark plug wire(s) or battery negative (-) cable to prevent engine from starting accidently.

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

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

2. Remove mower deck.

3. Remove drive belt.


MX10511

a. Remove three capscrews and belt shield (A).


MX10512

b. Loosen sheaves (B) and belt guides (C).

c. Remove mower belt.

4. Inspect belt for wear or damage; replace as necessary.

5. Clean top surface of mower deck and sheaves.

6. Install belt on mower deck as shown. Make sure belt is in the groove of each sheave and inside belt guides (C).

7. Tighten sheaves to 47 Nm (35 lb-ft).

8. Install belt shield.

9. Install mower deck.

10. Adjust mower belt tension and spindle brakes, if necessary.

Replacing Mower Drive Belt (122 cm (48 in.) Deck)

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

Disconnect spark plug wire(s) or battery negative (-) cable to prevent engine from starting accidently.

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

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

2. Remove mower deck.

3. Remove drive belt.


MX10505a

a. Remove seven capscrews and left and right belt shields (A).


MX10506a

b. Loosen sheaves (B) and (C).

c. Remove mower belt.

4. Inspect belt for wear or damage; replace as necessary.

5. Clean top surface of mower deck and sheaves.

6. Install belt on mower deck as shown. Make sure belt is in the groove of each sheave.

7. Tighten sheaves to 47 Nm (35 lb-ft).

8. Install belt shields.

9. Install mower deck.

Adjusting Mower Belt Tension (107 cm (42 in.) Deck)


MX7681

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

2. Loosen nuts (A) and move cable bracket (B) away from the center of deck to tighten belt tension. Tighten nuts.

Adjusting Spindle Brakes (107 cm (42 in.) Deck)

c CAUTION: Avoid injury! The mower blades should stop in approximately five seconds when the mower or PTO is disengaged.

If you believe that your blades may not be stopping in that period of time, take your machine to your authorized dealer where they can safely check and service your machine.

IMPORTANT: Avoid damage! Avoid belt damage.

Spindle brake engagement should be checked and corrected every time the mower belt tension is adjusted.

Mower belt tension should be adjusted, if required, before brakes are adjusted.


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

2. Remove mower deck.


MX10512

3. Remove left belt shield and adjust two blade brakes (A).


MX10507

4. Measure distance from spindle brake bracket (B) to nut (C) on end of brake rod.

Bracket to nut distance should be: 2 - 3 mm (0.08 - 0.12 in).

5. If adjustment is required, turn nut (C) on end of brake rod in correct direction to set brake at proper distance from pulley.

6. Adjust both brakes.

7. Install left belt shield.

8. Install mower deck.

Checking for Bent Mower Blades

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

Replace blades if defective. Never straighten or weld them.

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

2. Raise mower to highest 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

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

Disconnect spark plug wire(s) or battery negative (-) cable to prevent engine from starting accidently.

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.

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


MX10510

3. Loosen and remove two cap screws (A) and blade (B). Do not remove two nuts/bushings (C) inside holes of the blade adapter.

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

Installing Mower Blades


MX10510

1. Make sure that two nuts/bushings (C) are in place.

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

3. Align the center hole (D) in the blade with the spindle shaft (E) and put the blade onto the mower spindle.

4. Install and hand tighten cap screws (A) until mower blade is in full contact (fully seated) with spindle.

5. Block mower blade with a piece of wood to prevent spinning and tighten cap screws to 62 Nm (46 lb-ft).

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.


MIF

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.