Groundsmaster® 4500-D or 4700-D Rotary Mower

Move the seat adjustment lever on the side of the seat outward, slide the seat to the desired position, and release the lever to lock the seat into position (Figure 14).

Figure 14

1. Weight gauge
2. Weight adjustment lever
3. Seat adjustment lever
4. Seat-back adjustment lever
5. Armrest adjustment knob

Rotate the knob to adjust the armrest angle (Figure 14).

Move the lever to adjust the seat-back angle (Figure 14).

The weight gauge indicates when the seat is adjusted to the weight of the operator (Figure 14). Adjust the height by positioning the suspension within the range of the green region.

Use this lever to adjust the seat to your weight (Figure 14). Pull the lever up to increase the air pressure and push the lever down to decrease the air pressure. The proper adjustment is correct when the weight gauge is in the green region.

1. From the Main Menu, scroll down to the Settings Menu and press the right button.

2. In the Settings Menu, scroll down to the Protected Menu and press the right button.

3. To enter the PIN code, use the center button to set the first digit then press the right button to move on to the next digit.

4. Use the center button to set the second digit then press the right button to move on to the next digit.

5. Use the center button to set the third digit then press the right button to move on to the next digit.

6. Use the center button to set the fourth digit then press the right button.

7. Press the middle button to enter the code.

You can change the ability to view and change the settings in the Protected Menu. Go to the Protected Menu and scroll down to Protect Settings. Using the right button, changing Protect Settings to the OFF position allows you to view and change the settings in the Protected Menu without entering the PIN code. Changing Protect Settings to the ON position hides the protected options and requires entering a PIN code to change the setting in the Protected Menu. After you have set the PIN code, you must turn the key to the OFF position and then to the ON position to enable and save this feature.

1. In the Protected Menu, scroll down to Protect Settings.

2. To view and change the settings without entering a PIN code, use the right button to change the Protect Settings to OFF.

3. To view and change the settings with a PIN code, use the left button to select ON, set the PIN code, and turn the key to the OFF position and then to the ON position.

1. In the Settings Menu, scroll down to Auto Idle.

2. Press the right button to change the auto idle time between Off, 8S, 10S, 15S, 20S, and 30S.

1. In the Settings Menu, scroll down to Mow Speed and press the right button.

2. Use the right button to increase the maximum mow speed in 5% increments between 50% and 100%.

3. Use the center button to decrease the maximum mow speed in 5% increments between 50% and 100%.

4. Press the left button to exit.

1. In the Settings Menu, scroll down to Transport Speed and press the right button.

2. Use the right button to increase the maximum transport speed in 5% increments between 50% and 100%.

3. Use the center button to decrease the maximum transport speed in 5% increments between 50% and 100%.

4. Press the left button to exit.

1. In the settings menu, scroll down to Smart Power.

2. Press the right button to switch between ON and OFF.

3. Press the left button to exit.

1. In the Settings Menu, scroll down to Counter Balance and press the right button.

2. Press the right button to switch between Low, Med, and High.

When finished with the Protected Menu, press the left button to exit to the Main Menu, then press the left button to exit to the Run Menu.

1. In the Settings Menu, scroll down to Turnaround.

2. Press the right button to switch between ON and OFF.

3. Press the left button to exit.

You can view the average fuel consumption rate for the lifetime of the machine in the Service Menu.

Before you start the engine and use the machine, check the oil level in the engine crankcase; refer to Checking the Engine-Oil Level.

Before you start the engine and use the machine, check the cooling system; refer to Checking the Cooling System.

Before you start the engine and use the machine, check the hydraulic system; refer to Checking the Hydraulic-Fluid Level.

Drain water or other contaminants from the water separator; refer to Draining Water from the Fuel/Water Separator.

Check the rear axle and rear-axle gearbox for leaks; refer to Checking the Rear Axle and Gearbox for Leaks.

The correct air pressure in the tires is 138 kPa (20 psi).

Important: Maintain the recommended pressure in all tires to ensure a good quality of cut and proper machine performance. Do not under-inflate the tires.Check the air pressure in all the tires before operating the machine.

Figure 18

Torque the wheel lug nuts to 115 to 136 N∙m (85 to 100 ft-lb) in the order shown in Figure 19 and Figure 20.

Figure 19

Front Wheels

Figure 20

Rear Wheels

Important: The cutting units often cut approximately 6 mm (1/4 inch) lower than a reel cutting unit with the same bench setting. It may be necessary to set the cutting-unit bench measurement at 6 mm (1/4 inch) above that of reel cutting units cutting in the same area.

Important: Access to the rear cutting units is greatly improved by removing the cutting unit from the machine.

1. Park the machine on a level surface, engage the parking brake, lower the cutting unit to the ground, shut off the engine, and remove the key.

2. Loosen the bolt securing each height-of-cut bracket to the height-of-cut plate (front and each side) as shown in Figure 21.

3. Beginning with front adjustment, remove the bolt.

   

   Figure 21

   1. Height-of-cut bracket
   2. Height-of-cut plate
   3. Spacer

4. While supporting the chamber, remove the spacer (Figure 21).

5. Move the chamber to the desired height of cut and install a spacer into the designated height-of-cut hole and slot (Figure 22).

   

   Figure 22

6. Position the tapped plate in-line with the spacer.

7. Install the bolt finger-tight.

8. Repeat steps 4 through 7 for each side adjustment.

9. Torque all 3 bolts to 41 N∙m (30 ft-lb). Always tighten the front bolt first.

   Note: Adjustments of more than 3.8 cm (1-1/2 inches) may require temporary assembly to an intermediate height to prevent binding (e.g., changing from 3.1 to 7 cm (1-1/4 to 2-3/4 inches) height of cut).

The interlock switches are designed to shut off the machine when you rise from the seat when the traction pedal is pressed. However, you may rise from the seat while the engine is running and the traction pedal is in the NEUTRAL position. Although the engine continues to run when you disengage the PTO switch and release the traction pedal, shut off the engine before rising from the seat.

1. Park the machine on a level surface, engage the parking brake, lower the cutting units, and turn the key to the OFF position.

2. Press the traction pedal and turn the key to the ON position.

   Note: If the engine cranks, there is a malfunction in the interlock system. Correct this malfunction before operating the machine.

3. Turn the key to the ON position, rise from the seat, and move the PTO switch to ON.

   Note: The PTO should not engage. If the PTO engages, there is a malfunction in the interlock system. Correct this malfunction before operating the machine.

4. Engage the parking brake, turn the key to the ON position and move the traction pedal out of the NEUTRAL position.

   Note: The InfoCenter displays "traction denied" and the machine should not move. If the machine does move, there is a malfunction in the interlock system. Correct this malfunction before operating the machine.

Note: Lower the cutting units onto a clean section of turf or hard surface to avoid throwing dust and debris.

To verify this stopping time, have someone stand back from the cutting units at least 6 m (20 ft) and watch the blades on 1 of the cutting units. Disengage the PTO and record the time it takes for the blades to come to a complete stop. If this time is greater than 7 seconds, adjust the braking valve. Call your authorized Toro distributor for assistance in making this adjustment.

Important: Bleed the fuel system if any of the following have occurred:

• The engine has shut off due to lack of fuel.

• Maintenance has been performed upon the fuel system components.

1. Remove your foot from the traction pedal and ensure that it is in NEUTRAL. Ensure that the parking brake is engaged.

2. Press down and hold the engine-speed switch to set the engine to low-idle speed.

3. Turn the key to the RUN position. The glow indicator should illuminate.

4. When the glow indicator dims, turn the key to the START position.

   Important: Do not run the starter motor more than 15 seconds at a time or premature starter failure may result. If the engine fails to start after 15 seconds, turn the key to the OFF position, check the controls and procedures, wait 15 additional seconds, and repeat the starting procedure.

5. Release the key immediately when the engine starts and allow it to return to the RUN position.

6. Press the engine-speed switch to set the desired engine speed.

   When the temperature is less than -7°C (20°F), the starter motor can be run for 30 seconds on then 60 seconds off for 2 attempts.

   Important: Shut off the engine and allow the engine to cool before you check for oil leaks, loose parts, or other malfunctions.

Important: Allow the engine to idle for 5 minutes before shutting it off after a full-load operation. This allows the turbocharger to cool down before shutting off the engine. Failure to do so may lead to turbocharger trouble.

Note: Lower the cutting units to the ground whenever machine is parked. This relieves the hydraulic load from the system, prevents wear on system parts and also prevents accidental lowering of the cutting units.

1. Press down and hold the engine-speed switch to set the engine to low-idle speed.

2. Move the PTO switch to the OFF position.

3. Engage the parking brake.

4. Rotate the ignition key to the OFF position.

5. Remove the key to prevent accidental starting.

Practice driving the machine, because it has a hydrostatic transmission and its characteristics may differ from other turf-maintenance machines. Some points to consider when operating the traction unit, cutting unit, or other implements are that the transmission, engine speed, and the load on the mower blades or other implements affect machine performance.

With Toro Smart Power™, the operator does not have to listen to the engine speed in heavy load conditions. Smart Power prevents the engine from bogging down in heavy cutting conditions by automatically controlling the machine speed and optimizing cutting performance.

You can use the brakes to assist in turning the machine. However, use them carefully, especially on soft or wet grass, because the turf may be torn accidentally. Another benefit of the brakes is to maintain traction. For example, in some slope conditions, the uphill wheel slips and loses traction. If this situation occurs, press the uphill brake pedal gradually and intermittently until the uphill wheel stops slipping, This action increases the traction on the downhill wheel.

Important: Allow the engine to idle for 2 minutes before shutting it off after a full-load operation. This allows the turbo charger to cool down before shutting the engine off. Failure to do so may lead to turbo-charger trouble.

Before shutting off the engine, disengage all controls and set the engine speed to slow. Setting the engine speed to slow reduces high engine rpm, noise, and vibration. Turn the key to the OFF position to shut off the engine.

The engine cooling fan is normally controlled by the machine. The machine has the ability to reverse the fan to blow debris off the rear screen. Under normal operating conditions, the machine controls the fan speed and direction based on coolant and hydraulic-fluid temperature, and the fan automatically reverses direction to blow debris off the rear screen.

You can manually reverse the fan by pressing the 2 outer buttons of the InfoCenter for 2 seconds—the fan completes a manually initiated reverse cycle. Reverse the fan when the rear screen is clogged or prior to moving the machine into the shop or a storage area.

Figure 23

The cruise-control switch locks in the pedal position to maintain the desired ground speed. Pressing the rear of the switch turns the cruise control off, the middle position of the switch enables the cruise-control function, and the front of the switch sets the desired ground speed.

Note: Pressing either the brake pedal or moving the traction pedal into the REVERSE position, for 1 second, also disengages the pedal position.

Use the 2 rear-transport latches for the No. 6 and 7 cutting units when moving the machine over long distances, rough terrain, when transporting, or storing the machine.

Figure 24

Use the cutting-unit storage lanyards to prevent the forward outer cutting units from settling when the machine is parked overnight or if it is being stored for an extensive period. You can also use the cutting-unit storage lanyards to prevent the cutting units from floating while the machine is transporting between mowing tasks.

Figure 25

Stowing the Lanyards

Note: Stow the lanyards when you are not using them.

1. Ensure that the PTO is disengaged.

2. Park the machine on a level surface.

3. Engage the parking brake.

4. With the cutting units lowered, slip the loop of the lanyard into the slot in the reinforcement plate of the roller support (Figure 27).

Figure 27

1. Reinforcement-plate slot (roller support)
2. Lanyard loop

• Remove the key and shut off the fuel (if equipped) before storing or hauling the machine.

• Use care when loading or unloading the machine into a trailer or a truck.

• Use full-width ramps for loading the machine into a trailer or a truck.

• Tie the machine down securely.

In an emergency, you can move the machine forward by actuating the bypass valve in the variable-displacement hydraulic pump and pushing or towing the machine.

Important: Do not push or tow the machine faster than 3 to 4.8 km/h (2 to 3 mph). If you push or tow at a faster speed, internal transmission damage may occur.The bypass valves must be open whenever you push or tow the machine.

1. Open the hood and locate the bypass valves (Figure 28) on the top of pump, behind the battery/storage boxes.

2. Rotate each valve 3 turns counter-clockwise to open and allow the fluid to bypass internally.

   Note: Do not open the valve more than 3 turns. Because fluid is bypassed, the machine can be slowly moved without damaging the transmission.

   

   Figure 28

   1. Bypass valve (2)

3. Push or tow the machine forward.

   Important: If you must push or tow the machine in reverse, refer to the Reverse Tow Kit (Part No. 136-3620).

4. Finish pushing or towing the machine and close the bypass valve. Torque the valve to 70 N∙m (52 ft-lb).

Note: Use properly-rated DOT-approved straps in 4 corners to tie down the machine.

• On each side of the frame by the operator’s platform

• On the rear bumper

Figure 29

Figure 30

Use the following as points to lift the machine:

Front of the machine—at the frame of the machine, forward of the wheel-drive motors (Figure 31)

Important: Do not support the machine at the wheel-drive motors. Keep the lifting equipment clear of hydraulic tubing and hoses.

Figure 31

Rear of the machine—at the center of the axle (Figure 32)

Locate the jackstands of the specified capacity at both sides of the gear case and under the axle.

Important: Do not support the machine at the tie rod.

Figure 32

Tilt the hood to access the chassis as shown in Figure 33.

Figure 33

Tilt the seat to access the hydraulic lift compartment as shown in Figure 34.

Figure 34

Grease specification: No. 2 lithium grease

The grease fitting locations and quantities are as follows:

• Brake-shaft pivot bearings (5) as shown in Figure 35

  

  Figure 35

• Rear-axle-pivot bushings (2) as shown in Figure 36)

  

  Figure 36

• Steering-cylinder ball joints (2) as shown in Figure 37

  

  Figure 37

  1. Top fitting on kingpin

• Tie-rod ball joints (2) as shown in Figure 37

• Kingpin bushings (2) as shown in Figure 37

  Important: Lubricate the top fitting on the kingpin no more than annually (2 pumps).

• Lift-arm bushings (1 per cutting unit) as shown in Figure 38

  

  Figure 38

• Lift-cylinder bushings (2 per cutting unit) as shown in Figure 38

• Cutting-unit spindle-shaft bearings (2 per cutting unit) as shown in Figure 39

  Note: You can use either fitting, whichever is more accessible. Pump grease into the fitting until a small amount appears at the bottom of the spindle housing (under the cutting unit).

  

  Figure 39

• Cutting-unit carrier-arm bushings (1 per cutting unit) as shown in Figure 39

• Rear roller bearings (2 per cutting unit) as shown in Figure 40

  

  Figure 40

  Important: Make sure that the grease groove in each roller mount aligns with the grease hole in each end of the roller shaft. To help align the groove and the hole, there is also an alignment mark on 1 end of the roller shaft.

Check the air-cleaner body for damage which could cause an air leak. Replace it if it is damaged. Check the whole intake system for leaks, damage, or loose hose clamps.

Service the air-cleaner filter only when the service indicator (Figure 41) requires it. Changing the air filter before it is necessary only increases the chance of dirt entering the engine when you remove the filter.

Figure 41

1. Air-cleaner indicator

Important: Ensure that the cover is seated correctly and seals with the air-cleaner body.

1. Replace the air cleaner (Figure 42).

   

   Figure 42

   Note: Do not clean a used element because cleaning it can damage the filter media.

   Important: Never attempt to clean the safety filter (Figure 43). Replace the safety filter after every 3 primary filter services.

   

   Figure 43

   1. Air-cleaner safety filter

2. Reset the indicator (Figure 41) if it shows red.

In addition to the listed service interval, drain and clean the tank if the fuel system becomes contaminated or if you are storing the machine for an extended period. Use clean fuel to flush out the tank.

Inspect the fuel lines for deterioration, damage, or loose connections.

1. Clean the area around the fuel-filter head (Figure 49).

   

   Figure 49

   1. Fuel-filter head
   2. Fuel filter

2. Remove the filter and clean the filter head mounting surface (Figure 49).

3. Lubricate the filter gasket with clean lubricating engine oil; refer to the engine owner's manual for additional information.

4. Install the dry filter canister, by hand, until the gasket contacts the filter head, then rotate it an additional 1/2 turn.

5. Start the engine and check for fuel leaks around the filter head.

The fuel-pickup tube, located inside the fuel tank, is equipped with a screen to help prevent debris from entering the fuel system. Remove the fuel-pickup tube and clean the screen as required.

1. Remove the hose clamp that secures the fuel supply hose to the fitting of the fuel-pickup tube (Figure 50).

   

   Figure 50

   1. Fitting (fuel-pickup tube)
   2. Hose clamp
   3. Fuel supply hose
   4. Rubber bushing
   5. Screen

2. Separate the hose from the fitting (Figure 50).

3. Lift the fuel-pickup tube from the fuel tank (Figure 50).

   Note: Lift the tube straight from the bushing in the tank.

4. Clean any debris from the screen at the end of the fuel-pickup tube (Figure 50).

5. Insert the fuel-pickup tube through the rubber bushing and into the tank (Figure 50).

   Note: Ensure that the fuel-pickup tube is fully seated into the rubber bushing.

6. Install the supply hose onto the fitting of the fuel-pickup tube, and secure the hose with the hose clamp that you removed in step 1.

Prime the fuel system before starting the engine for the first time, after running out of fuel, or after fuel system maintenance (e.g., draining the filter/water separator, replacing a fuel hose).

To prime the fuel system, perform the following steps:

1. Ensure that fuel is in the fuel tank.

2. Turn the ignition key to the ON position for 10 to 15 seconds.

   Note: This allows the fuel pump to prime the fuel system.

Important: Do not use the engine starter motor to crank the engine to prime the fuel system.

Important: Before welding on the machine, disconnect the negative cable from the battery to prevent damage to the electrical system. Also, you must disconnect the engine, InfoCenter, and machine controllers before welding on the machine.

Note: Keep the terminals and the entire battery case clean, because a dirty battery discharges slowly. To clean the battery, wash the entire case with a solution of baking soda and water. Rinse with clear water. Coat the battery posts and cable connectors with Grafo 112X (skin-over) grease (Toro Part No. 505-47) or petroleum jelly to prevent corrosion.

1. Unlatch and raise the operator's console panel (Figure 51).

   

   Figure 51

   1. Operator's console panel
   2. Latch

   Danger

   Battery electrolyte contains sulfuric acid, which is fatal if consumed and causes severe burns.

   • Do not drink electrolyte and avoid contact with skin, eyes, or clothing. Wear safety glasses to shield your eyes and rubber gloves to protect your hands.

   • Fill the battery where clean water is always available for flushing the skin.

2. Remove the rubber boot from the positive terminal and inspect the battery.

3. Remove the negative cable (black) from the negative (-) terminal and the positive cable (red) from the positive (+) terminal of the battery (Figure 52).

   Warning

   Incorrect battery cable routing could damage the machine and cables, causing sparks. Sparks can cause the battery gasses to explode, resulting in personal injury.

   • Always disconnect the negative (black) battery cable before disconnecting the positive (red) cable.

   • Always connect the positive (red) battery cable before connecting the negative (black) cable.

   Warning

   Battery terminals or metal tools could short against metal components, causing sparks. Sparks can cause the battery gasses to explode, resulting in personal injury.

   • When removing or installing the battery, do not allow the battery terminals to touch any metal parts of the machine.

   • Do not allow metal tools to short between the battery terminals and metal parts of the machine.

   

   Figure 52

   1. Positive battery cable
   2. Negative battery cable

4. Connect a 3 to 4 A battery charger to the battery posts. Charge the battery at a rate of 3 to 4 A for 4 to 8 hours.

   Warning

   Charging the battery produces gasses that can explode.

   Never smoke near the battery and keep sparks and flames away from battery.

5. When the battery is charged, disconnect the charger from the power outlet and battery posts.

6. Install the positive cable (red) to the positive (+) terminal and the negative cable (black) to the negative (-) terminal of the battery (Figure 52).

7. Secure the cables to the posts with bolts and nuts.

   Note: Make sure that the positive (+) terminal is all the way on the post and the cable is positioned snug to the battery. The cable must not contact the battery cover.

8. Coat both battery connections with Grafo 112X (skin-over) grease, Part No. 505-47, petroleum jelly, or light grease to prevent corrosion.

9. Slide the rubber boot over the positive terminal.

10. Close the console panel and secure the latch.

The fuse block for the machine is located in the right storage box

Figure 53

1. Loosen the latch for the cover of the right storage box and raise the cover (Figure 54) to expose the fuse block (Figure 55).

   

   Figure 54

   1. Latch
   2. Right storage box

2. Replace the open fuse(s) as needed (Figure 55).

   

   Figure 55

   1. Fuses

3. Close the cover of the right storage box and secure the cover with the latch (Figure 54).

There should be no end-play in the planetary drives/drive wheels (i.e., the wheels should not move when you pull or push them in a direction parallel to the axle).

1. Park the machine on a level surface, engage the parking brake, lower the cutting units, shut off the engine, and remove the key.

2. Chock the rear wheels and raise the front of machine, supporting the front axle/frame on jack stands.

   Danger

   A machine on a jack may be unstable and slip off the jack, injuring anyone beneath it.

   • Do not start the engine while the machine is on a jack.

   • Always remove the key from the switch before getting off the machine.

   • Block the tires when you are raising the machine with a jack.

   • Support the machine with jack stands.

3. Grasp 1 of the front drive wheels and push/pull it toward and away from the machine, noting any movement.

   

   Figure 57

   1. Front drive wheels

4. Repeat step 3 for the other drive wheel.

5. If either wheel moves, contact your authorized Toro distributor to have the planetary drive rebuilt.

Lubricant Specification: high quality SAE 85W-140 gear lubricant

1. Park the machine on level surface, position the wheel so that the fill plug is at the 12 o'clock position, the check plug is at 3 o'clock position, and the drain plug is at the 6 o'clock position (Figure 58).

   

   Figure 58

   1. Fill plug (12 o’clock position)
   2. Check plug (3 o’clock position)
   3. Drain plug (6 o’clock position)

2. Remove the check plug at the 3 o’clock position (Figure 58).

   The oil level should be at the bottom of the check-plug hole.

   

   Figure 59

   1. Check-plug hole
   2. Check plug

3. If the oil level is low, remove the fill plug at the 12 o’clock position and add oil until it begins to flow out of the hole at the 3 o’clock position.

4. Check the O-ring for the plug(s) for wear or damage.

   Note: Replace the O-ring(s) as needed.

5. Install the plug(s).

6. Repeat steps 1 through 5 on the planetary gear assembly at the other side of the machine.

Lubricant specification: high quality SAE 85W-140 gear lubricant

Planetary and brake housing lubrication capacity: 0.65 L (22 fl oz)

Visually inspect the rear axle and rear-axle gearbox for leaks.

Figure 64

The rear axle is filled with SAE 85W-140 gear lube. The capacity is 2.4 L (80 fl oz). Visually inspect for leaks daily.

1. Park the machine on a level surface, engage the parking brake, lower the cutting units, shut off the engine, and remove the key.

2. Remove a check plug from 1 end of the axle and ensure that the lubricant is up to the bottom of the hole (Figure 65).

   Note: If the level is low, remove the fill plug and add enough lubricant to bring the level up to the bottom of the check-plug holes.

   

   Figure 65

   1. Check plug
   2. Fill plug

Lubricant specification: high-quality SAE 85W-140 gear lubricant

Axle capacity: 2.4 L (80 fl oz)

1. Park the machine on a level surface, engage the parking brake, lower the cutting units, shut off the engine, and remove the key.

2. Clean the area around the 3 drain plugs—1 on each end and 1 in the center (Figure 66).

   

   Figure 66

   1. Drain-plug location

3. Remove the oil-level check plugs and the main-axle-vent cap to ease draining the gear lubricant.

4. Remove the drain plugs and allow the gear lubricant to drain into the pans.

5. Install the plugs.

6. Remove a check plug and fill the axle with approximately 2.4 L (80 fl oz) of 85W-140 gear lube or until the lubricant is up to the bottom of the hole.

7. Install the check plug.

The gear box is filled with SAE 85W-140 gear lube. The capacity is 0.5 L (16 fl oz). Visually inspect for leaks daily.

1. Park the machine on a level surface, engage the parking brake, lower the cutting units, shut off the engine, and remove the key.

2. Remove the check/fill plug from the left side of the gear box and ensure that lubricant is up to the bottom of the hole (Figure 67).

   Note: If the level is low, add enough lubricant to bring the level up to the bottom of the hole.

   

   Figure 67

   1. Gearbox
   2. Check/fill plug

1. Park the machine on a level surface, engage the parking brake, lower the cutting units, shut off the engine, and remove the key.

2. Measure the center-to-center distance (at axle height) at the front and rear of the steering tires (Figure 68).

   Note: The front measurement must be 3 mm (1/8 inch) less than the rear measurement.

   

   Figure 68

   1. Front of the machine
   2. 3 mm (1/8 inch) less than the rear measurement
   3. Center to center distance

3. To adjust, remove the cotter pin and nut from either tie rod ball joint (Figure 69). Remove the tie-rod ball joint from the axle-case support.

   

   Figure 69

   1. Tie-rod clamp
   2. Tie-rod ball joint

4. Loosen the clamps at both ends of the tie rods (Figure 69).

5. Rotate the detached ball joint inward or outward 1 complete revolution and tighten the clamp at the loose end of the tie rod.

6. Rotate the entire tie-rod assembly the same direction (inward or outward) 1 complete revolution and tighten the clamp at the connected end of the tie rod.

7. Install the ball joint in the axle-case support, tighten the nut finger-tight, and measure the toe-in.

8. Repeat procedure if necessary.

9. Tighten the nut and install a new cotter pin when the adjustment is correct.

Coolant specification: 50/50 mixture of water and ethylene glycol antifreeze

Cooling system capacity: 8.5 L (9 US qt).

1. Park the machine on a level surface, engage the parking brake, lower the cutting units, shut off the engine, and remove the key.

2. Carefully remove the radiator cap.

   

   Figure 70

   1. Expansion tank

3. Check the coolant level in the radiator. The radiator should be filled to the top of the filler neck and the expansion tank filled to the FULL mark (Figure 70).

4. If the coolant is low, add a 50/50 mixture of water and ethylene glycol anti-freeze. Do not use water only or alcohol/methanol based coolants.

5. Install the radiator cap and expansion-tank cap.

This machine is equipped with a hydraulically driven fan drive system that automatically (or manually) reverses to reduce oil cooler/radiator and screen debris buildup. While this feature can help reduce the time required to clean oil cooler/radiator, it does not eliminate the need for routine cleaning. Periodic cleaning and inspection of the radiator/cooler is still required.

1. Park the machine on a level surface, engage the parking brake, lower the cutting units, shut off the engine, and remove the key.

2. Unlatch and swing open the rear screen (Figure 71).

   Note: To remove the screen, lift it off the hinge pins.

3. Clean the screen thoroughly of all debris.

   

   Figure 71

   1. Rear-screen latch

4. Thoroughly clean both sides of the oil cooler and the radiator with compressed air (Figure 72).

   Note: Start from the front and blow the debris out toward the back. Then clean from the back side and blow toward the front. Repeat procedure several times until you remove all chaff and debris.

   

   Figure 72

   1. Oil cooler/radiator

   Important: Cleaning the oil cooler/radiator with water promotes premature corrosion damage to components and compacts debris.

5. Close the rear screen and secure it with the latch.

Adjust the service brakes when there is more than 25 mm (1 inch) of free travel of the brake pedal, or when the brakes do not work effectively. Free travel is the distance the brake pedal moves before you feel braking resistance.

1. Park the machine on a level surface, engage the parking brake, lower the cutting units, shut off the engine, and remove the key.

2. Release the locking latch from the brake pedals so that both pedals work independently of each other.

3. To reduce free travel of the brake pedals, tighten the brakes as follows:

   1. Loosen the front nut on the threaded end of the brake cable (Figure 73).

      

      Figure 73

      1. Brake cable

   2. Tighten the rear nut to move the cable rearward until the brake pedals have 13 to 25 mm (1/2 to 1 inch) of free travel.

   3. Tighten the front nuts after the brakes are adjusted correctly.

Proper tension of the belt allows 10 mm (3/8 inch) of deflection when a force of 4.5 kg (10 lb) is applied on the belt midway between the pulleys.

If the deflection is not 10 mm (3/8 inch), loosen the alternator-mounting bolts (Figure 74).

Note: Increase or decrease the alternator-belt tension and tighten the bolts. Check the deflection of the belt again to ensure that the tension is correct.

Figure 74

1. Mounting bolt
2. Alternator

Inspect the hydraulic lines and hoses daily for leaks, kinked lines, loose mounting supports, wear, loose fittings, weather deterioration, and chemical deterioration. Make all necessary repairs before operating the machine.

1. Park the machine on a level surface, engage the parking brake, lower the cutting units, shut off the engine, and remove the key.

2. Disconnect and remove the hydraulic motor from the cutting unit (Figure 78). Cover the top of the spindle to prevent contamination.

   

   Figure 78

   1. Motor-mounting screws

3. Remove the lynch pin (for Groundsmaster 4500 machines) or retaining nut (for Groundsmaster 4700 machines) securing the cutting unit-carrier frame to the lift-arm pivot pin (Figure 79).

   

   Figure 79

   1. Lynch pin
   2. Lift-arm pivot pin

4. Roll the cutting unit away from the machine.

1. Move the cutting unit into position in front of the machine.

2. Slide the cutting unit-carrier frame onto the lift-arm-pivot pin (Figure 79). Secure the cutting unit to the pin with the lynch pin (for Groundsmaster 4500 machines) or retaining nut (for Groundsmaster 4700 machines).

3. Install the hydraulic motor to the cutting unit (Figure 78). Make sure that the O-ring is in position and not damaged.

4. Grease the spindle.

Inspect the front roller for wear, excess wobble, or binding. Service or replace the roller or components if any of these conditions exist.

The cutting unit comes from the factory preset at 5 cm (2 inches) height of cut and blade rake of 7.9 mm (0.310 inch). The left and right heights are also preset to within ± 0.7 mm (0.030 inch) of the other.

The cutting unit is designed to withstand blade impacts without deformation of the chamber. If the blade strikes a solid object, inspect the blade for damage and the blade plane for accuracy.

Replace the blade if it hits a solid object, is out of balance, or is bent. Always use genuine Toro replacement blades to ensure safety and optimum performance.

1. Park the machine on a level surface, raise the cutting unit to the transport position, engage the parking brake, shut off the engine, and remove the key.

   Note: Block or lock the cutting unit to prevent it from accidentally falling.

2. Grasp the end of the blade using a rag or thickly-padded glove.

3. Remove the blade bolt, anti-scalp cup, and blade from the spindle shaft (Figure 83).

   

   Figure 83

   1. Blade bolt
   2. Anti-scalp cup

4. Install the blade, anti-scalp cup, and blade bolt and tighten the blade bolt to 115 to 149 N∙m (85 to 110 ft-lb).

   Important: The curved part of the blade must be pointing toward the inside of the cutting unit to ensure proper cutting.

   Note: After striking a foreign object, torque all spindle-pulley nuts to 115 to 149 N∙m (85 to 110 ft-lb).

Two areas must be considered when checking and servicing the mower blade—the sail and the cutting edge. Both cutting edges and the sail, which is the turned-up portion opposite of the cutting edge, contribute to a good quality of cut. The sail is important because it lifts the grass up straight, thereby producing an even cut. However, the sail gradually wears down during operation. As the sail wears down, the quality of cut degrades, although the cutting edges are sharp. The cutting edge of the blade must be sharp so that the grass is cut rather than torn. A dull cutting edge is evident when the tips of the grass appear brown and shredded. Sharpen the cutting edges to correct this condition.

1. Park the machine on a level surface, raise the cutting unit, engage the parking brake, put the traction pedal in NEUTRAL, put the PTO lever in the OFF position, shut off the engine, and remove the key from the ignition.

2. Examine the cutting ends of the blade carefully, especially where the flat and curved parts of the blade meet (Figure 84).

   Note: Because sand and abrasive material can wear away the metal that connects the flat and curved parts of the blade, check the blade before using the mower. If wear is noticed (Figure 84), replace the blade.

   

   Figure 84

   1. Cutting edge
   2. Curved area
   3. Wear/slot forming
   4. Crack

3. Examine the cutting edges of all of the blades and sharpen the cutting edges if they are dull or nicked (Figure 85).

   Note: Sharpen only the top of the cutting edge and maintain the original cutting angle to ensure sharpness (Figure 85). The blade remains balanced if you remove the same amount of metal from both cutting edges.

   

   Figure 85

   1. Sharpen at the original angle.

   Note: Remove the blades and sharpen them on a grinder. After sharpening the cutting edges, install the blade with the anti-scalp cup and blade bolt; refer to Inspecting and Sharpening the Cutting Unit Blade(s).

4. Ensure that the blade is straight and parallel; lay the blade on a level surface and check its ends. The ends of the blade must be slightly lower than the center, and the cutting edge must be lower than the heel of the blade.