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Service Mower


Removing or Installing Mower Drive Belt at Engine Drive Sheave (122 cm (48 in.) and 137 cm (54 in.) Mower Deck)

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

2. Put lift lever in lowest position.

c CAUTION: Avoid injury! Component is spring-assisted and under tension. Injury can occur if spring-assisted component is released suddenly.


MX10520Y

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

4. Remove belt (B) from drive sheave (C), and release tension on sheave nut (A).

5. To install the belt on the drive sheave, rotate idler sheave nut clockwise to move idler sheave toward front of tractor, and install belt on drive sheave.

6. Release idler sheave nut to tighten belt.

Removing Mower Deck

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

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

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


MX7681a

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

4. On machines with 107 cm (42 in.), disconnect mower engagement drive cable (A) on left side of mower deck.

a. Remove spring locking pin (B), pull and hold mower engagement 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.


MX16568

5. Remove spring locking pins and washers (F) and disconnect rear draft arm (G) and adjustable lift links (H) on each side.


MX10521Y

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

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

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

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

9. When operating the machine without the mower deck:

• Remove front draft rod from machine and attach it to the mower deck.


MX10514

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

Installing Mower Deck

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

2. Put attachment lift lever in the transport position.

3. Slide mower under machine.

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

5. Put attachment lift lever in lowest position.


MX16568

6. Fasten rear draft arm (A) and adjustable lift link (B), on each side, with washers and spring locking pins (C).

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.



MX10521Y

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

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

c CAUTION: Avoid injury! Component is spring-assisted and under tension. Injury can occur if spring-assisted component is released suddenly.


MX10520Y

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

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

• On 122 cm (48 in.) and 137 cm (54 in.) mower decks: Put a 15 mm closed wrench or a socket on the idler sheave nut (H) and rotate clockwise, moving idler sheave and tensioning arm toward front of tractor. Hold while installing belt on drive sheave.


MX10521Y

• On 107 cm (42 in.) mower deck: Make sure belt is routed through both belt guides (I).

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

10. On machines with 107 cm (42 in.) mower deck: Attach mower engagement drive cable.


MX7681a

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

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

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

11. Level mower deck.

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

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).

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 N•m (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.) and 137 cm (54 in.) Mower Decks)

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

2. Remove mower deck.


MX38398

Picture Note: 122 cm (48 in.) mower deck shown.

3. Remove five capscrews and left and right belt shields (A).

4. Remove drive belt.

a. Loosen left side sheaves (B) and (C).

b. Remove mower belt.

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

6. Clean top surface of mower deck and sheaves.

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

8. Tighten sheaves to 47 N•m (35 lb-ft).

9. Install belt shields.

10. Install mower deck.

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

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

2. Move mower engagement (PTO) lever or switch to OFF position.


MX7681a

3. Loosen nuts (A) and move cable bracket (B) away from the center of mower deck to tighten belt tension. Move bracket until almost all slack is out of cable but cable is not too tight. Tighten nuts.

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

Using Wash Port to Clean Mower Deck

NOTE: Follow this procedure after each use to prevent buildup and remove corrosive lawn chemicals.

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


MX38397

2. Attach a garden hose with quick-coupler to wash port (A) on the mower deck.

3. Turn on water.

4. Start engine.

5. Run at full throttle.

6. Engage mower blades.

7. Flush water under deck for approximately one minute.

8. Disengage mower blades.

9. Stop engine.

10. Turn off water and remove garden hose from wash port.

Checking for Bent Mower Blades

c CAUTION: Avoid injury! Blades are sharp. Always wear gloves when handling 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 deck 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 accidentally.

• Always wear gloves when handling mower blades 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. Block mower blade with a piece of wood to prevent it from spinning.


MX16569

4. Loosen and remove nut (A), washer (B), and blade (C).

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

Installing Mower Blades

1. Position mower blade (C) with the cutting edge towards the ground.

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

3. Install washer, with cupped side towards blade, and install nut to secure blade onto splined spindle shaft.

4. Block mower blade with a piece of wood to prevent spinning and tighten nut:

• 42 in. and 48 in. decks: Models with M12 nut , 75 N•m (55 lb-ft) - use 18 mm socket. Models with 5/8 in. nut, 88 N•m (65 lb-ft) - use 15/16 in. socket.

• 54 in. deck: 88 N•m (65 lb-ft).

Sharpening Blades

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