Groundsmaster® 3300 and 3310 All-Wheel Drive Traction Unit

Refer to the following table for the weight that is shipped with each machine:

Ensure that your machine has the minimum amount of rear weight per your traction unit and attachment combination. For Model 31902A, you can also add more rear weight for improved slope performance.

• To determine the minimum number of weights required, refer to the Minimum Required Rear Weight table.

• To achieve an improved slope performance, add the number of each weights as listed in the Required Rear Weight for Improved Slope Performance table.

  To ensure proper ROPS performance, do not add more weight beyond the weight that is listed in this table.

Note: If you have an equipped CE Kit, refer to the kit Installation Instructions for the appropriate slope decal for your traction unit and attachment combination. Ensure that the correct amount of rear weight is added (i.e., weight to meet required slope standard or weight to meet improved slope performance).

Minimum Required Rear Weight

Traction Unit Model Number	Attachment Model Number(s) or Name	Number of Weights Required
		19 kg (42 lb)	6 kg (15 lb)	Total
31902A	31970, 31971, 31974	0	0	0
	31970, 31971, 31974 and Sunshade	0	0	0
	31972, 31973, 31975	0	0	0
	31972, 31973, 31975 and Sunshade	1	0	1
	02835	1	0	1
	02835 and Sunshade	1	0	1
	M-B Rotary Broom	1	0	1
31903A	31970, 31971	5	2	7
	31972, 31973
	02835
	MSC23345
	M-B Rotary Broom
	Erskine Snowthrower

Required Rear Weight for Improved Slope Performance

Traction Unit Model Number	Attachment Model Number(s) or Name	Number of Weights Required
		19 kg (42 lb)	6 kg (15 lb)	Total
31902A	31970, 31971, 31974	4	0	4
	31970 and Sunshade	4	0	4
	31971, 31974 and Sunshade	3	0	3
	31972, 31973, 31975	3	1	4
	31972, 31973, 31975 and Sunshade	2	0	2
	02835	2	2	4
	02835 and Sunshade	1	0	1

If you need to add rear weight, contact your authorized Toro distributor for additional weights and refer to the following installation procedures:

1. Loosen the hardware that secures the weight-lock rod to the bumper.

   

   Figure 17

   1. Weight-lock rod
   2. Nut
   3. Weight—19 kg (42 lb)

2. Add the required amount of weights.

3. Tighten the weight-lock-rod hardware to secure the weight to the bumper.

1. Refer to your authorized Toro distributor to order the following parts:

   Part Name	Quantity	Part Number
   Screw (3/8 x 3-1/2 inches)	2	116-4701
   Washer	2	125-9676
   Nut (3/8 inch)	2	104-8301

2. Use the hardware to secure the weights to the bumper (Figure 18).

   

   Figure 18

   1. Hardware
   2. Weight—6 kg (15 lb)

The attachment lift switch raises the attachment to the highest position (i.e., the TRANSPORT position) and lowers the attachment to the lowest position (i.e., the OPERATING) position.

• Raise the attachment: Press the rear of the switch.

• Lower the attachment: Press the front of the switch.

Raise the attachment to the TRANSPORT position whenever you transport the machine between locations. Lower the attachment to the OPERATING position whenever you are not using the machine.

• Engage the PTO: Pull up on the switch.

• Disengage the PTO: Push the switch down.

The only time you should engage the PTO is when the PTO attachment is in the OPERATING position (lowered to the ground with the driveshaft connected) and you are ready to begin operation.

Note: If you leave the operator’s seat while the PTO switch is in the ON position, the machine will automatically shut off the engine; refer to Resetting the PTO Function.

The key switch has 3 positions: OFF, ON/PREHEAT, and START.

Use the switch to start or shut off the engine [refer to Starting the Engine or Shutting Off the Engine] or to review the display-screen information [refer to Understanding the Display-Screen Information].

Use the switch to adjust the engine speed.

• Increase the engine speed: Press and release the front part of the switch to increase the speed by 100 rpm. Press and hold to increase the speed to the maximum amount.

• Decrease the engine speed: Press the rear part of the switch to decrease the speed by 100 rpm. Press and hold to decrease the speed to the minimum amount (idle).

The display screen shows information about your machine, such as the operating status, various diagnostics, and other information.

Refer to Understanding the Display-Screen Information for more display-screen information.

Refer to Using the Display-Screen Button.

Use the switch (Figure 25) to turn the windshield wipers on or off.

Rotate the fan-control knob (Figure 25) to regulate the speed of the fan.

Press the switch (Figure 25) to turn the dome light on or off.

Rotate the temperature-control knob (Figure 25) to regulate the air temperature in the cab.

Use this switch (Figure 25) to turn the air conditioning on or off. Use the fan-control knob to control the air-conditioning.

Open the recirculation vents (Figure 25) when the air conditioning is on.

Check the following machine systems each day before operating the machine:

• Air-cleaner indicator; refer to Servicing the Air Cleaner

• Engine oil; refer to Checking the Engine-Oil Level

• Coolant system; refer to Checking the Cooling System and Coolant Level

• Hood screen and radiator; refer to Checking the Cooling Fins

• Hydraulic-fluid level; refer to Checking the Hydraulic-Fluid Level

• PTO-shaft grease points; refer to Greasing the Bearings and Bushings

Tire air pressure specification: 138 kPa (20 psi)

Check the air pressure in the front and rear tires. Add or remove air as needed to set the air pressure in the tires to the tire air pressure specification.

Important: Maintain pressure in all tires to ensure a good quality of cut and proper machine performance.Check the air pressure in all the tires before operating the machine.

Figure 27

The purpose of the safety-interlock system is to prevent the engine from cranking or starting unless the traction pedal is in neutral and the PTO switch is in the OFF position. In addition, the engine should stop when the following occurs:

• The PTO switch is set to the ON position and you are not in the seat.

• The traction pedal is pressed but you are not in the seat.

• The traction pedal is pressed and the parking brake is engaged.

1. Move the PTO switch to OFF position and remove your foot from traction pedal.

2. Rotate the key switch to the START position. If the engine cranks, proceed to step 3.

   Note: If engine does not crank, there may be a malfunction in the safety-interlock system.

3. With the engine running, rise from the seat and set the PTO switch to the ON position . The engine should shut off within 2 seconds. If the engine shuts off, proceed to step 4.

   Important: If engine does not shut off, there is a malfunction in the safety-interlock system. Refer to your authorized Toro distributor.

4. With the engine running and the PTO switch set to the OFF position, raise off the seat and press the traction pedal. The engine should shut off within 2 seconds. If engine shuts off, proceed to step 5.

   Important: If engine does not shut off, there is a malfunction in the safety-interlock system. Refer to your authorized Toro distributor.

5. Engage the parking brake. With the engine running and the PTO switch set to the ON position, press the traction pedal. The engine should shut off within 2 seconds. If engine shuts off, the switch is operating correctly; the interlock system is ready for machine operation.

   Important: If engine does not shut off, there is a malfunction in the safety-interlock system. Refer to your authorized Toro distributor.

The display screen shows information about your machine, such as the operating status, various diagnostics, and other information about the machine. There are two main-information screens (Figure 31) and a main menu screen.

Figure 31

1. Battery level and hour meter screen
2. Engine temperature and engine speed screen

Using the Display-Screen Button

Use the display-screen button (shown in Figure 32) to toggle between the 2 main-information screens and to access the main menu.

Figure 32

1. Display screen
2. Display-screen button

• To access the main menu: Hold down the display-screen button until the menu items appear on the screen.

• To select a menu item: Quickly press the display-screen button twice.

  You can also perform this action to toggle an option (e.g., toggling between English or metric units in the SETTINGS screen).

• To return to the previous screen (e.g., returning to the MAIN MENU screen from the SETTINGS screen, or returning to the main-information screens from the MAIN MENU screen): Hold down the display-screen button until the previous screen appears.

• To scroll down to the next menu item: Press the display-screen button once.

Understanding the Menu Items

Main Menu

Menu Item	Description
FAULTS	Contains a list of the recent machine faults. Refer to the Service Manual or your authorized Toro distributor for more information on the FAULTS menu.
SERVICE	Contains information on the machine such as hours of use, counts and DPF regeneration. Refer to the Service table.
DIAGNOSTICS	Lists various states and data that the machine currently has. You can use this information to troubleshoot certain issues, as it quickly tells you which machine controls are on/off and lists control levels (e.g., sensor values).
SETTINGS	Allows you to customize and modify configuration variables on the InfoCenter display. Refer to the Settings table.
ABOUT	Lists the model number, serial number, and software version of your machine. Refer to the About table.

Service

Menu Item	Description
HOURS	Lists the total number of hours that the key, engine, and PTO have been on.
COUNTS	Lists the number of engine and PTO starts.
DPF REGENERATION	Allows you to control DPF settings; refer to Understanding the Diesel-Particulate Filter and Regeneration.

Settings

Menu Item	Description
UNITS	Controls the units used on the display screen. The menu choices are English or metric.
LANGUAGE	Controls the language used on the display screen.
BACKLIGHT	Controls the brightness of the display screen.
CONTRAST	Controls the contrast of the display screen.
PROTECTED MENUS	Allows a person authorized by your company with the PIN code to access protected menus (i.e., the slope sensor setting and the ability to clear the fault log).
PROTECT SETTINGS	When disabled, you can access protected settings without entering the PIN code.
TURNAROUND	Engages or disengages Turnaround mode. This setting is used with the flail mower; refer to the flail Operator’s Manual for more information.
SLOPE SENSOR INSTALLED	Shows whether or not a slope sensor is installed. If a slope sensor is removed from the machine, this setting can be disabled to clear the slope-sensor communication fault.
LOW RPM PTO ENGAGE	Engages or disengages Low RPM PTO Engage mode. This setting is used with the flail mower; refer to the flail Operator’s Manual for more information.

Protected under Protected Menus—accessible only by entering PIN

Diagnostics

Menu Item	Description
DECK	Indicates if the cutting unit inputs/outputs are active.
PTO	Indicates if the PTO is active.
ENGINE	Indicates if the engine inputs/outputs are active.

About

Menu Item	Description
MODEL	Lists the model number of the machine.
SN	Lists the serial number of the machine.
S/W REV	Lists the software revision of the master controller.
CE MODE	Indicates if CE Mode is enabled or disabled.

Understanding the Display-Screen Icons

Refer to the following table for a description of each display-screen icon:

Display-Screen Icons

	Engine speed
	Engine fault
	Hour meter
	Air intake heater is active
	Operator must sit in seat
	Parking brake is engaged
	Neutral
	PTO is engaged
	PTO is disabled
	Indicates when the cutting units are being lowered
	Indicates when the cutting units are being raised
	PIN passcode
	Battery
	Coolant temperature
	Reset-standby regeneration request
	Parked or recovery regeneration request
	A parked or recovery-standby regeneration is processing.
	High exhaust temperature
	NOx control diagnosis malfunction; drive the machine back to the shop and contact your authorized Toro distributor.

The diesel-particulate filter (DPF) removes soot from the engine exhaust.

The DPF regeneration process uses heat from the engine exhaust that is increased by the catalyst to reduce accumulated soot into ash.

To keep the DPF clean, remember the following:

• Run the engine at full engine speed when possible to promote DPF self-cleaning.

• Use the correct engine oil.

• Minimize the amount of time that you idle the engine.

• Use only ultra low sulfur diesel fuel.

Operate and maintain your machine with the function of the DPF in mind. Engine under load generally produces adequate exhaust temperature for DPF regeneration.

Important: Minimize the amount of time that you idle the engine or operate the engine at low-engine speed to help reduce the accumulation of soot in the DPF.

Understanding the Regeneration Icons

Icon	Icon Definition
	• Parked or recovery regeneration icon-regeneration is requested.
	• Perform the regeneration immediately.
	• Notes that a regeneration is acknowledged
	• Notes that a regeneration is in progress and the exhaust temperature is elevated
	• Inhibit regeneration is selected
	• NOx control system malfunction; the machine requires service.

Types of Diesel Particulate Filter Regeneration

Types of diesel particulate filter regeneration that are performed while the machine is operating:

Regeneration Type	Conditions that cause DPF regeneration	DPF description of operation
Reset	Occurs every 100 hours	• When the high exhaust-temperature icon is displayed in the InfoCenter, a regeneration is in progress.
	Also occurs if normal engine operation surpasses the allowed soot accumulation amount within the filter
		• During reset regeneration, the engine computer maintains an elevated engine speed to ensure filter regeneration.
		• Avoid shutting off the engine while the reset regeneration is processing.

Types of diesel particulate filter regeneration that require you to park the machine:

Regeneration Type	Conditions that cause DPF regeneration	DPF description of operation
Parked	Occurs because the computer determines that the automatic DPF cleaning has not been sufficient.	• When the reset-standby/parked or recovery regeneration icon or a regeneration is requested.
	Also occurs because you initiate a parked regeneration
	May occur because the inhibit regen has been initiated and has disabled the automatic DPF cleaning from occuring	• Perform the parked regeneration as soon as possible to avoid needing a recovery regeneration.
	May result from using the incorrect fuel or engine oil	• A parked regeneration requires 30 to 60 minutes to complete.
		• You must have at least a 1/2 tank of fuel in the tank.
		• You must park the machine to perform a parked regeneration.
Recovery	Occurs because the request for parked recovery has been ignored, allowing the DPF to be critically plugged	• When the reset-standby/parked or recovery regeneration icon a recovery regeneration is requested.
		• A recovery regeneration requires up to 3 hours to complete.
		• You must have at least a 1/2 tank of fuel in the machine.
		• You must park the machine to perform a recovery regeneration.

1. Sit on the operator’s seat and fasten the seat belt.

2. Ensure that the parking brake is engaged and the PTO is disengaged.

3. Preheat the engine by rotating the key switch to the ON/PREHEAT position.

   Note: An automatic timer controls the preheat for 6 seconds.

4. Rotate the key to the START position, crank the engine for no longer than 15 seconds, and allow the key to return to the ON/PREHEAT position.

   Note: If additional preheating is required, turn the key to the OFF position, then to the ON/PREHEAT position. Repeat this process as needed.

5. Move the throttle to idle speed or partial throttle and run the engine until it warms up.

Note: If you leave the operator’s seat while the PTO switch is in the ON position, the machine will automatically shut off the engine.

Perform the following to reset the PTO function:

1. Push down the PTO switch.

2. Start the engine; refer to Starting the Engine.

3. Pull up the PTO switch.

Engage the turnaround mode whenever you install the flail mower (Model 02835).

Turnaround mode allows you to quickly raise the flail mower above the turf when completing a quick turn at the end of a mowing pass, or while navigating around obstacles.

When you lower the flail mower to the OPERATING position, you can quickly press and release the attachment lift switch rearward to slightly raise the flail when you perform a quick turn. Once you have completed the turn, press the lift switch to lower the flail back to the ground and resume mowing.

1. Use the throttle control to lower the engine speed.

2. Move the PTO switch to the OFF position.

3. Rotate the key switch to the OFF position and remove the key from the switch.

You can rotate the cutting unit from the TRANSPORT position (A in Figure 33) to the SERVICE position (B in Figure 33). Use the SERVICE position to maintain the cutting unit blades or clean underneath the cutting unit; refer to your cutting unit Operator’s Manual.

Figure 33

1. TRANSPORT position
2. SERVICE position

If you must tow or push the machine, set the traction pump to bypass the hydraulic fluid. Move the machine at a speed below 4.8 kph (3 mph) for a very short distance.

Important: If you exceed towing limits, severe damage to the hydraulic pump may result.If you must move the machine more than a short distance, transport it on a trailer.

1. Access the bypass valve from under the machine.

   

   Figure 39

   Bottom View

   1. Right-front tire
   2. Bypass valve
   3. Traction pump

2. Use a 14 mm (9/16 inch) box-end wrench to loosen the bypass valve, then open the valve no more than 3 revolutions.

   Important: Do not start or run the engine when the valve is set to the bypass position.

3. After towing and before starting the engine, tighten the bypass valve to 12 N·m (9 ft-lb).

• 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.

• Remove the key before storing or hauling the machine.

1. Release the straps from each side of the machine (Figure 42).

   

   Figure 42

2. Raise the hood (Figure 42).

Note: If your machine is equipped with a hood lock, use a key to unlock and raise the hood.

The machine has grease fittings that you must lubricate regularly with No. 2 lithium grease.

Important: Lubricate the machine immediately after every washing.

• Idler arm (Figure 43)

  

  Figure 43

  1. Idler arm

• PTO driveshaft (Figure 44)

  Important: Grease the driveshaft before each use or daily.

  

  Figure 44

  1. Grease fittings

• Axle pivot pin (Figure 45)

  

  Figure 45

  1. Axle pivot pin

• Front of the machine (Figure 46):

  • Attachment pivot hubs (2)

  • Lift-cylinder bushings (2)

  • Lift-arm pivot pins (2)

  

  Figure 46

  Front of the machine

  1. Attachment pivot hubs
  2. Lift-cylinder bushings
  3. Lift-arm pivot hubs

• Rear of the machine (Figure 47):

  • Hydraulic-cylinder ball joint (2)

  • Axle spindle hubs (2)

  

  Figure 47

  Rear of the machine (bumper removed)

  1. Axle spindle hubs
  2. Steering-cylinder ball joint

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

Service the air-cleaner element only when the restriction indicator (Figure 51) requires it. Changing the air cleaner element before it is necessary increases the chance of dirt entering the engine when you remove the element.

Figure 51

1. Air-cleaner restriction indicator

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

1. Replace the air filter element (Figure 52).

   

   Figure 52

   Important: Do not clean a used element; cleaning it can damage the filter media.

2. Reset the restriction indicator (Figure 51) if it shows red.

1. Drain water from the fuel/water separator as shown in Figure 53.

   

   Figure 53

2. Prime the filter and the lines to the high pressure pump; refer to Priming the Fuel System.

1. Replace the fuel/water separator as shown in Figure 53.

   

   Figure 54

2. Prime the filter and the lines to the high pressure pump; refer to Priming the Fuel System.

1. Clean the area around the fuel-filter head (Figure 55).

   

   Figure 55

   1. Fuel-filter head
   2. Fuel filter

2. Remove the filter and clean the filter head mounting surface (Figure 55).

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. Prime the filter and the lines to the high pressure pump; refer to Priming the Fuel System.

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

Drain and clean tank if fuel system becomes contaminated or if you store the machine for an extended period. Use clean diesel fuel to flush out the tank.

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

Prime the fuel system after the following scenarios:

• Replacing the fuel filter.

• Draining the water separator after each use or daily.

• Running out of fuel.

• Replacing a fuel hose or open the fuel system for any reason.

To prime the fuel system, perform the following steps:

Important: Do not use the engine-starter motor to crank the engine for fuel-system priming.

1. Ensure that fuel is in the fuel tank.

2. Perform the following steps to prime the filter and the lines to the high-pressure pump to prevent wear or damage to the pump:

   1. Cycle the key to the ON position for 15 to 20 seconds.

   2. Cycle the key to the OFF position for 30 to 40 seconds.

      Note: This allows the ECU to power down.

   3. Cycle the key to the ON position for 15 to 20 seconds.

   4. Inspect for leaks around the filter and hoses.

   5. Start the engine and inspect for leaks.

The battery is adjacent to the fuel tank on the left side of the machine. To access the battery, raise the hood, unscrew the thumb screw that secures the cover over the battery, and remove the cover (Figure 56).

Note: The screw is retained with a locking washer.

Figure 56

1. Battery cover
2. Thumb screw

1. Remove the negative battery cable from the battery post (Figure 57).

   

   Figure 57

   1. Negative battery cable
   2. Positive battery cable

2. Lift the insulator and remove the positive battery cable from the battery post (Figure 57).

1. Connect the positive cable to the battery and tighten the battery-clamp nut (Figure 58).

   

   Figure 58

   1. Positive battery cable
   2. Negative battery cable

2. Connect the negative cable to the battery and tighten the battery-clamp nut (Figure 58).

   Important: Ensure that the cable-clamp fasteners do not interfere with the fuel tank.

A retainer (Figure 59) holds the battery in the tray. Loosen the retainer hardware to remove the battery; tighten it when installing the battery.

Note: To access the battery, refer to Accessing the Battery. Replace the cover when you install the battery.

Figure 59

1. Retainer hardware
2. Retainer

Important: Before welding on the machine, disconnect the negative cable from the battery to prevent damage to the electrical system.

Check the battery condition weekly or after every 50 hours of operation. Keep the terminals and the entire battery case clean, as a dirty battery will discharge slowly.

1. Access the battery; refer to Accessing the Battery.

2. Remove the rubber insulator from the positive terminal and inspect the battery. If the battery is dirty, do the following steps:

   1. Wash the entire case with a solution of baking soda and water.

   2. Coat both battery posts and cable connectors with Grafo 112X (skin-over) grease (Toro Part No. 505-47) to prevent corrosion.

   3. Slide the rubber insulator over the positive terminal.

   4. Close the battery cover.

Wheel-lug nut torque specification: 102 to 108 N∙m (75 to 80 ft-lb)

Torque the lug nuts at the front and rear wheels (4-wheel-drive machines only) in the pattern as shown in Figure 64 and Figure 65 to the specified torque.

• Front wheels: refer to Figure 64

  

  Figure 64

• Rear wheels (4-wheel-drive machines only): refer to Figure 65

  

  Figure 65

If you separate the PTO-driveshaft telescoping end the from the clutch end, ensure that the paint markings are aligned and the key aligns with the missing spline in the clutch end (Figure 66) when you install the telescoping end. The end yokes should also be aligned as shown in Figure 66.

Important: If the driveshaft is not aligned, severe imbalance may occur in the driveline system.

Figure 66

1. Paint markings

The coolant reservoir is filled at the factory with a 50/50 solution of water and ethylene glycol base extended-life coolant.

Important: Use only commercially available coolants that meet the specifications listed in the Extended Life Coolant Standards Table.Do not use conventional (green) inorganic-acid technology (IAT) coolant in your machine. Do not mix conventional coolant with extended-life coolant.

Coolant Type Table

Extended Life Coolant Standards

Important: Coolant concentration should be a 50/50 mixture of coolant to water.

• Preferred: When mixing coolant from a concentrate, mix it with distilled water.

• Preferred option: If distilled water is not available, use a pre-mix coolant instead of a concentrate.

• Minimum requirement: If distilled water and pre-mix coolant are not available, mix concentrated coolant with clean drinkable water.

When the engine is cold, the coolant level should be no higher than the COLD mark on the side of the expansion tank (Figure 67). When the engine is warm, the coolant level should be no higher than the FULL (HOT) mark.

If the coolant is above the COLD mark when the engine is cold, it may leak out of the tank when the engine gets hot during operation.

1. When the engine is cold, check the level of the coolant in the expansion tank.

   

   Figure 67

   1. Cap
   2. FULL (HOT) mark
   3. COLD mark

2. If the coolant is not visible at the COLD mark or below when cold, remove the expansion-tank cap and add the recommended replacement coolant [refer to Coolant Specification] as required to bring the level to the COLD mark.

   Important: Do not use water only or alcohol-based coolants.Do not fill past the COLD mark on the tank.

3. Install the expansion-tank cap.

Figure 68

1. Hood-air-intake screen

1. Raise the hood; refer to Raising the Hood.

2. Use compressed air to clean the hood screen (shown in Figure 68). Direct the air out from the machine.

• Use compressed air to clean the radiator fins. Direct the air out from the machine (Figure 69).

  Important: Do not use water to clean the fins.

  

  Figure 69

  1. Compressed-air direction

• Straighten any bent fins.

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

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), perform the following steps:

1. Loosen the alternator-mounting bolt (Figure 63).

   

   Figure 72

   1. Mounting bolt
   2. Alternator

2. Increase or decrease the alternator-belt tension and tighten the bolt.

3. Check the deflection of the belt again to ensure that the tension is correct.

1. Allow the engine to cool.

2. Raise the engine hood.

3. Adjust the air gap so that a 0.3 mm (0.012 inch) feeler gauge slides in between the clutch lining and friction plate with light pressure (Figure 75).

   Note: You can decrease the gap by turning the adjusting nuts clockwise (Figure 75). The maximum service gap is 0.6 mm (0.024 inch). Adjust all 3 air gaps to 0.4 mm (0.012 inches).

   

   Figure 75

   1. Clutch
   2. Adjusting nut (3)
   3. 0.3 mm (0.012 inch) air gap (3)

4. After the 3 air gaps are adjusted, check all 3 again.

   Note: Adjusting 1 air gap can alter the other gaps.

You can adjust the traction pedal for operator comfort or to reduce the maximum forward speed of the machine.

1. Move the traction pedal fully forward (Figure 76).

   Note: The traction pedal should contact the traction-pedal stop before the pump reaches full stroke.

   

   Figure 76

   1. Traction pedal
   2. Traction-pedal stop
   3. Jam nut (top of the footrest plate)

2. If the traction pedal does not contact the traction-pedal stop or if you want to reduce the forward speed of the machine, perform the following:

   1. Hold the traction-pedal stop (Figure 76) with a wrench.

   2. Loosen the jam nut at the bottom of the footrest plate (Figure 77).

      

      Figure 77

      1. Jam nut (bottom of the footrest plate)

   3. Move the traction pedal to the full forward position (Figure 76).

   4. While holding the traction-pedal stop, adjust the jam nut that is above the footrest plate (Figure 76) until the traction pedal makes contact with the stop.

   5. Lengthen the traction-pedal stop position by rotating the stop 1 full rotation counterclockwise away from the jam nut above the footrest plate.

      Note: Shortening the traction-pedal-stop position will increase the forward speed of the machine.

   6. While holding the traction-pedal stop, torque the jam nut at the bottom of the footrest plate (Figure 76 and Figure 77) to 37 to 45 N∙m (27 to 33 ft-lb).

   7. Check that the traction pedal contacts the traction-pedal stop before the pump reaches full stroke.

      Note: If the traction pedal does not contact the traction-pedal stop, repeat steps 1 through 7.

The reservoir is filled at the factory with approximately 22.7 L (6 US gallons) of high-quality hydraulic fluid. Check the level of the hydraulic fluid before the engine is first started and daily thereafter; refer to Checking the Hydraulic-Fluid Level.

Recommended replacement fluid: Toro PX Extended Life Hydraulic Fluid; available in 19 L (5 US gallon) pails or 208 L (55 US gallon) drums.

Note: A machine using the recommended replacement fluid requires less frequent fluid and filter changes.

Alternative hydraulic fluids:If Toro PX Extended Life Hydraulic Fluid is not available, you may use another conventional, petroleum-based hydraulic fluid having specifications that fall within the listed range for all the following material properties and that it meets industry standards. Do not use synthetic fluid. Consult with your lubricant distributor to identify a satisfactory product.

Note: Toro does not assume responsibility for damage caused by improper substitutions, so use products only from reputable manufacturers who will stand behind their recommendation.

High Viscosity Index/Low Pour Point Anti-wear Hydraulic Fluid, ISO VG 46

Note: Many hydraulic fluids are almost colorless, making it difficult to spot leaks. A red dye additive for the hydraulic fluid is available in 20 ml (2/3 fl oz) bottles. A bottle is sufficient for 15 to 22 L (4 to 6 US gallons) of hydraulic fluid. Order Part Number. 44-2500 from your authorized Toro distributor.

Important: Toro Premium Synthetic Biodegradable Hydraulic Fluid is the only synthetic biodegradable fluid approved by Toro. This fluid is compatible with the elastomers used in Toro hydraulic systems and is suitable for a wide-range of temperature conditions. This fluid is compatible with conventional mineral oils, but for maximum biodegradability and performance, the hydraulic system should be thoroughly flushed of conventional fluid. The oil is available in 19 L (5 US gallon) pails or 208 L (55 US gallon) drums from your authorized Toro distributor.

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

2. Remove the plug from the hydraulic tank (Figure 78).

   

   Figure 78

3. Remove the dipstick from the hydraulic tank and wipe it with a clean cloth (Figure 78).

4. Insert the dipstick into the hydraulic tank.

5. Remove the dipstick and check the fluid level (Figure 79).

   • If you have a cutting unit equipped: The hydraulic-fluid level is at the appropriate level when the fluid appears between the lower 2 marks on the dipstick (A in Figure 79). It is also acceptable for the fluid level to be above the lower marks.

   • If you have the Hydraulic Driven Attachment Hose Kit equipped: The hydraulic-fluid level is at the appropriate level when the fluid appears between the upper 2 marks on the dipstick (B in Figure 79).

   

   Figure 79

6. If the fluid level is below the appropriate lower mark (per your equipped attachment; refer to step 5) on the dipstick, add the specified hydraulic fluid into the tank. Repeat steps 3 through 5 until the fluid level appears between the appropriate 2 marks on the dipstick.

7. Insert the dipstick and plug into the hydraulic tank.

8. Hand-tighten the plug.

   Important: Do not use a tool to tighten the plug.

9. Check all hydraulic hoses and fittings for leaks.

If the hydraulic fluid becomes contaminated, contact your authorized Toro distributor; the system must be flushed. Contaminated fluid looks milky or black when compared to clean fluid.

Important: Use Toro replacement filters; refer to the machine Parts Catalog. Using any other filter may void the warranty on some components.

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

2. Place a large drain pan under the hydraulic-fluid tank.

3. Remove the hydraulic-tank cap and dipstick.

4. Remove the drain plug (Figure 80) from the bottom of the tank and let the hydraulic fluid flow into the pan.

   

   Figure 80

   1. Hydraulic filter
   2. Drain plug

5. Clean the area around the filter-mounting area.

6. Place a drain pan under the filter (Figure 80), remove the filter, and let any remaining oil drain into the pan.

7. Lubricate the new filter gasket and fill the filter with hydraulic fluid.

8. Ensure that the filter-mounting area is clean and screw the filter on until the gasket contacts the mounting plate; then tighten the filter an additional 1/2 turn.

9. Fill the hydraulic tank with hydraulic fluid; refer to Checking the Hydraulic-Fluid Level.

   Important: Use only the hydraulic fluids specified. Other fluids could cause system damage.

10. Install the drain plug when the hydraulic fluid stops draining.

11. Install the reservoir dipstick and cap.

12. Start the engine and use all of the hydraulic controls in the following order to distribute hydraulic fluid throughout the system:

    1. Use the traction pedal to move the machine forward and backward.

    2. Use the steering wheel to move the tires all the way to the right and left.

    3. Use the lift switch to raise and lower the attachment (e.g., cutting unit).

13. Check for leaks and shut off the engine.

14. Check the hydraulic fluid level in the tank; refer to Checking the Hydraulic-Fluid Level.

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.

Important: Use care around the cab seals (Figure 81). If you are using a pressure washer, keep the washer wand at least 0.6 m (2 ft) away from the machine. Do not use the pressure washer directly on the cab seals or under the rear overhang.

Figure 81

1. Seal
2. Keep wand 0.6 m (2 ft) away.
3. Do not pressure wash under the rear overhang.

1. Remove the knobs and grates from the cab rear overhang (Figure 82).

   

   Figure 82

   1. Filter
   2. Knob
   3. Grate

2. Remove the air filters from the cab.

3. Clean the filters by blowing clean, oil-free, compressed air through them.

   Important: If either filter has a hole, tear, or other damage, replace the filter.

4. Use the knobs and grates to install the filters into the cab (Figure 82).

The purpose of the cab condenser filter is to prevent large debris, such as grass and leaves, from entering the cab condenser and condenser fans.

1. Pull the screen cover straight down.

2. Clean the condenser filter with water.

   Note: Do not use a pressure washer.

   Important: If the filter has a hole, tear, or other damage, replace the filter.

3. Allow the filter to dry before installing it into the machine.

4. Rotate the filter screen around the tabs until the latch locks into the latch-mount assembly (Figure 83).

   

   Figure 83

   1. Latch-mount assembly
   2. Condenser filter
   3. Screen cover

Note: Refer to the Parts Catalog for the appropriate bulb part number.

1. Use a screwdriver to remove the light lens from the control panel. (Figure 84).

   

   Figure 84

   1. Screwdriver
   2. Bulb
   3. Lens

2. Remove the bulb from the light base (Figure 84).

3. Install a new bulb into the light base.

4. Install the lens into the control panel.

Note: The windshield-wiper-fluid reservoir is located next to the engine on the right side of the machine.

1. Remove the cap (Figure 85) on the reservoir.

   

   Figure 85

   1. Reservoir cap
   2. Reservoir

2. Fill the reservoir with wiper fluid.

3. Replace the cap on the reservoir.