Groundsmaster® 3280-D Traction Unit

Important: Use only electrolyte with a specific gravity of 1.265 to initially fill battery.

1. Remove the battery from the machine.

   Important: Do not add electrolyte while the battery is in the machine. You could spill it, causing corrosion.

2. Clean the top of the battery and remove the vent caps (Figure 9).

   

   Figure 9

   1. Vent caps

3. Carefully fill each cell with electrolyte until it covers the plates with about 6 mm (1/4 inch) of fluid (Figure 10).

   

   Figure 10

   1. Electrolyte

4. Allow the plates to soak in the electrolyte for 20 to 30 minutes.

   Note: Add electrolyte as necessary to bring the electrolyte level to 6 mm (1/4 inch) of the bottom of the fill well (Figure 10).

   Warning

   Charging the battery produces gasses that can explode.

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

1. Connect a 3 to 4 A battery charger to the battery posts. Charge the battery at a rate of 3 to 4 amps until the specific gravity of the electrolyte is 1.250 or higher and the temperature of the battery is at least 16°C (60°F), with all cells freely discharging gas.

2. When the battery is charged, disconnect the charger from the electrical outlet and then disconnect the charger from the battery posts.

   Note: Incomplete charging may result in gassing of the battery and the overflow of battery acid, causing corrosive damage to the machine.

   Warning

   Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling.

1. Install the battery into the machine.

2. Install the positive-battery cable (red) to the positive (+) terminal, and slide the rubber boot over the positive terminal (Figure 11).

   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.

   • Connect the cables to the correct battery post.

   • 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.

   

   Figure 11

   1. Positive (+)
   2. Negative (-)
   3. Front of the machine

   Note: Route the battery cables away from all sharp edges or moving parts.

3. Install the negative-battery cable (black) to the negative (-) terminal of the battery (Figure 11).

The left and right brake pedals (Figure 17) connect to the left and right front wheels. Since both brakes work independently of each other, you can use the brakes to turn sharply or to increase traction if 1 wheel tends to slip while operating on certain slope conditions. However, you can damage wet grass or soft turf whenever you use the brakes to turn sharply. To stop the machine quickly, press both brake pedals together. Always lock the brakes together when transporting the machine (Figure 18).

Whenever you shut off the engine, engage the parking brake to prevent the machine from accidentally moving. To engage the parking brake, push the lock arm (Figure 18) on the left brake pedal so that it locks together with the right pedal. Then push down fully on both pedals, pull the parking brake knob out (Figure 17), and release the pedals. To release the parking brake, press both pedals until the parking-brake knob retracts. Before starting the engine, release the lock arm from the left brake pedal so that both pedals work independently with each front wheel.

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

• Air Cleaner Indicator; refer to Checking the Air Cleaner Indicator

• 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 Hood Screen and Radiator for Debris

• Hydraulic system; refer to Checking the Hydraulic System and Fluid Level

Tire air pressure specification (front and rear tires): 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 22

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 PTO switch is set to the ON position and the operator off the seat;

• the traction pedal is pressed with the operator off the seat;

• the traction pedal pressed with the parking brake engaged.

1. Move 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, raise off 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.

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.

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.

Important: Always use the seat belt when the roll bar is in the raised and locked position. Do not use the seat belt when the roll bar is in the lowered position.

Lowering the Roll Bar

Important: Lower the roll bar only when absolutely necessary.

Important: Secure the seat with the seat latch.

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

2. Remove the cotter pins and pins from the roll bar (Figure 24).

3. Lower the roll bar and secure it in place with the pins and cotter pins (Figure 24).

Figure 24

Raising the Roll Bar

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

2. Remove the cotter pins and pins from the roll bar (Figure 25).

3. Raise the roll bar and secure it in place with the pins and cotter pins (Figure 25).

Figure 25

1. Remove the knob from the parking brake and the screws from the steering-column cover (Figure 26).

   

   Figure 26

   1. Parking-brake knob
   2. Mounting screw (4)

2. Slide the cover up the steering shaft to expose the pivot bracket (Figure 27).

   

   Figure 27

   1. Pivot plate
   2. Small nut
   3. Large nut

3. Loosen the small nut and rotate the pivot bracket until it tightens the large nut below it (Figure 27).

4. Tighten the small nut.

5. Install the steering-column cover and the parking-brake knob.

Important: You might need to bleed the fuel system in any of the following situations: initially starting up a new machine, the engine no longer running due to lack of fuel, or fuel system components replaced or serviced.

1. Raise the roll bar and lock it into place.

2. Sit on the seat and fasten the seat belt.

3. Engaged the parking brake and the set the PTO switch to the OFF position.

4. Remove your foot from traction pedal and ensure that it is in neutral.

5. Rotate the key switch to the ON/PREHEAT position.

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

6. After preheating, rotate the key switch to the START position, crank the engine for no longer than 15 seconds, and release the key when the engine starts.

   Note: If the engine is still cold, preheat it more by turning the key to the OFF position, then to the ON/PREHEAT position. Repeat this process as required.

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

   Important: When you start the engine for the first time; or after you change the engine oil or overhaul the engine, transmission, or axle; operate the machine in forward and reverse for 1 to 2 minutes. Also, operate the lift lever and PTO lever to ensure that all parts are properly operating. Turn the power-steering wheel to the left and right to check the steering response. Then shut the engine off, check the fluid levels, and check for oil leaks, loose parts, and any other malfunctions.

1. Move the throttle control rearward to the SLOW position.

2. Move the PTO switch to the OFF position.

3. Rotate key switch to the OFF position.

4. Remove the key from the switch to prevent accidental starting.

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 knob; refer to Figure 19 and PTO Switch.

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

3. Pull up the PTO switch knob; refer to Figure 19 and PTO Switch.

1. Park the machine on a level surface.

2. Engage the parking brake.

3. Ensure that the fuel tank is at least half full.

4. Unlatch and raise the hood.

5. Open the air-bleed screw on the fuel-injection pump (Figure 28).

   

   Figure 28

   1. Air-bleed screw

6. Rotate the key switch to the ON position.

   The electric fuel pump begins forcing air out around the air-bleed screw.

7. Leave the key switch in the ON position until a solid stream of fuel flows out around the screw.

8. Tighten the screw and rotate key switch to the OFF position.

   Note: The engine should start after you perform this procedure. However, if the engine does not start, air may be trapped between the injection pump and the injectors; refer to Purging the Air from the Fuel-Injector Tubing.

9. Wipe clean any fuel that has accumulated around the injection pump.

• Practice driving before operating the machine, because it has a hydrostatic transmission and its characteristics are different than some turf-maintenance machines.

• To maintain enough power for the machine and deck while mowing, regulate the traction pedal to keep the engine speed (rpm) high and constant. Decrease the ground speed as the load on the cutting blades increases; increase the ground speed as the load on the blades decreases. This allows the engine, working with the transmission, to sense the proper ground speed while maintaining a high blade-tip speed necessary for good quality of cut. Therefore, allow the traction pedal to move upward as the engine speed decreases, and press pedal slowly as the speed increases. When driving from 1 work area to another (with no load and the deck raised), have throttle in the FAST position and press the traction pedal slowly but fully to attain the maximum ground speed.

• Lock the brake pedals together before transporting the machine.

• You can use the brakes to assist in turning the machine; but, use them carefully on soft or wet grass because doing so may damage the turf. You can also use the brakes to control the direction of the deck when trimming along fences or similar objects. A third way you can use the brakes is to maintain traction. For example; in some slope conditions, the uphill wheel slips and loses traction. If this happens, press the uphill brake pedal gradually and intermittently until the uphill wheel stops slipping, thus increasing the traction on the downhill wheel. If you do not want independent braking, set the lever on left brake pedal with right pedal. This provides simultaneous braking at both wheels.

• Before shutting off the engine, move all controls to the NEUTRAL position and move the throttle to the SLOW position. Rotate the key switch to the OFF position to shut off the engine.

• The engine does not run when the engine coolant is in over temperature condition. Let the engine and cooling system cool, and check the cooling system; refer to Checking the Cooling System and Coolant Level.

In an emergency, you can move the machine a very short distance by actuating the bypass valve in the 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. If you must move the machine a considerable distance, transport it on a truck or trailer.

Important: The bypass valve must be open whenever you push or tow the machine. Close the valve once you have pushed or towed the machine to the desired location.

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

  

  Figure 30

  1. Tie-down loops

Grease specification: No. 2 lithium grease.

Important: Dusty and dirty operating conditions could cause dirt to get into the bearings and bushings, resulting in accelerated wear.

Note: Lubricate grease fitting immediately after every washing, regardless of interval specified.

1. Wipe grease fitting clean.

2. Pump grease into the bearing or bushing.

3. Wipe up excess grease.

The bearing and bushing lubrication points are as follows:

• PTO universal shaft (Figure 34)

  

  Figure 34

• Lift-arm pivot bushings (Figure 35)

  

  Figure 35

• Brake pivot bushings (Figure 36)

  

  Figure 36

• Brake cables (drive wheel and brake pedal ends) (Figure 36)

• PTO tension pivot (Figure 37)

  

  Figure 37

• Rear PTO bearing (Figure 37)

• Rear wheel spindle bushings (Figure 38)

  

  Figure 38

• Steering-plate bushings (Figure 39)

  

  Figure 39

• Axle-pin bushing (Figure 39)

• Drive shaft (3) (Figure 40)

  Note: 4-wheel drive models only.

  

  Figure 40

• Tie-rod ends (2) (Figure 41)

  

  Figure 41

• Cylinder-rod ends (2) (Figure 41)

• Steering pivots (2) (Figure 41)

• Axle-pivot pin (Figure 41)

Note: Improper wash-down procedures negatively affect bearing life. Do not wash down the machine when it is still hot and avoid directing high-pressure or high-volume spray at the bearings.

• Engine oil-type: API classification level: CH-4 or higher.

• Engine oil viscosity:

  • Preferred oil: SAE 15W-40 (above 0°F)

  • Alternate oil: SAE 10W-30 or 5W-30 (all temperatures)

Note: Toro Premium Engine Oil is available from your distributor in either 15W-40 or 10W-30 viscosity. See the parts catalog for part numbers.

The engine is shipped with oil in the crankcase.

Note: The best time to check the engine oil is when the engine is cool before it has been started for the day. If you have already run the engine, allow the oil to drain back down to the sump for at least 10 minutes before checking.

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

2. Open the hood.

3. Check the engine-oil level as shown in Figure 45.

   

   Figure 45

4. If the oil level is at or below the ADD mark on the dipstick, remove the oil-fill cap (Figure 46) and add oil to bring the oil level to the FULL mark on the dipstick.

   Do not overfill the engine with oil.

   

   Figure 46

   1. Oil-fill cap

5. Install the oil-fill cap and close the hood.

Crankcase capacity: approximately 3.8 L (4 US qt) with the filter.

1. If possible, run engine just before changing oil to warm it.

2. Position the machine on a level surface.

3. Open the hood.

4. Align a drain pan under the oil pan and in line with the drain plug (Figure 47).

   

   Figure 47

   1. Drain plug

5. Clean the area around the drain plug.

6. Remove the drain plug and allow the oil to flow into the drain pan.

7. Install the drain plug and wipe up any spilled oil.

8. Remove and replace the oil filter (Figure 48).

   

   Figure 48

   1. Oil filter

9. Fill the crankcase with specified oil; refer to the Engine Oil Specification and Checking the Engine-Oil Level.

Drain the water or other contaminants from the water separator (Figure 49) daily.

1. Place a clean container under the fuel filter.

2. Loosen the drain plug on the bottom of the filter canister (Figure 49).

   

   Figure 49

   1. Filter canister

3. Clean the area where the filter canister mounts.

4. Remove the filter canister and clean the mounting surface.

5. Lubricate the gasket on the filter canister with clean oil.

6. Install the filter canister by hand until the gasket contacts mounting surface, then rotate it an additional 1/2 turn.

7. Tighten the drain plug on the bottom of the filter canister.

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.

Note: Perform this procedure only if you have purged air from the fuel system using the normal priming procedures and engine does not start; refer to Purging the Fuel-Injection Pump.

1. Loosen the tube nut at the No. 1 injector nozzle and holder assembly at the injection pump (Figure 50).

   

   Figure 50

   1. No. 1 injector nozzle

2. Move the throttle to the FAST position.

3. Rotate the key switch to the START position and watch the fuel flow around the tube nut.

4. Rotate the key switch to the OFF position when you attain a solid flow of fuel from the tube.

5. Tighten the tube nut securely.

6. Wipe clean any fuel that has accumulated around the injector nozzle and the injection pump.

7. Repeat steps 1 through 6 for the remaining nozzles.

The fuse blocks and fuses are located under the control panel (Figure 54).

Figure 54

1. Fuse blocks

Important: The information presented below is and overview of the standard control module. Refer to the Service Manual for the machine for troubleshooting procedures using the standard control module.

The standard control module (SCM) monitors and controls standard electrical features of the machine.

Yellow LED indicators on the printed-circuit board identify the inputs and outputs.

The SCM monitors inputs of the following:

• Controls in the NEUTRAL position

• Parking brake position

• Power takeoff (PTO) operation

• Engine starting function

• High temperature condition

The SCM controls outputs features include the following:

• The SCM energizes the outputs for the PTO, starter, and the ETR (energize to run) solenoids.

• Output LEDs monitor relay condition indicating the presence of voltage at 1 of 3 specific output terminals.

Note: The SCM does not connect to an external computer or hand held device, it is not programmable, and it does not record intermittent fault troubleshooting data.

The Standard Control Module Decal

The decal on the SCM only includes symbols. The output box shows the 3 LED output symbols. All other LEDs are inputs. To identify the conditions the symbols indicate, refer to the chart in Standard Control Module Chart.

Figure 55

Prevent corrosion of wiring terminals by applying Grafo 112X (Skin-over) grease, Toro Part No. 505-47, to the inside of all harness connectors whenever you replace the harness.

Important: Whenever working with the electrical system, always disconnect the battery cables, negative (-) cable first, to prevent possible wiring damage from short-outs.

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 in a crossing pattern as shown in Figure 56 to the specified torque.

Figure 56

Rear Axle-Lubricant Specification: SAE 80W-90 weight gear lube

Clutch lubricant specification: Mobilfluid 424™

Important: Do not use engine oil (such as 10W30) in the bidirectional clutch. Anti-wear and extreme pressure additives cause undesirable clutch performance.

Note: Determine the left and right sides of the machine from the normal operating position.

1. Move the machine to a level surface, shut off the engine and remove the key from the key switch.

2. Torque the 4 bolts for the steering-cylinder mount (Figure 64) to 65 to 81 N∙m (48 to 60 ft-lb).

   

   Figure 64

   1. Bolt—4 each (steering-cylinder-mount)

If the machine moves when the traction pedal is in the neutral position, adjust the traction cam.

The rear-axle-steering stops help prevent over-travel of the steering cylinder in case of impact on the rear wheels. Adjust the stops so that there is 0.23 cm (0.090 inch) clearance between the bolt head and the knuckle on the axle when you turn the steering wheel completely to the left or to the right.

1. Thread the bolts in or out until you attain a clearance of 0.23 cm (0.090 inch); refer to Figure 67.

   

   Figure 67

   1. Steering stop (right side shown)

2. Loosen the screw on the tie-rod clamp.

3. Rotate the ball joint in or out to adjust the length of the tie rod.

4. Install the ball joint to the mounting bracket and check the wheel toe-in.

5. After attaining the desired adjustment, tighten the screw on the tie-rod clamp and secure the ball joint to the mounting bracket.

Cooling system capacity: 7.5 L (8 US qt)

Coolant-type specification:

1. Check the level of the coolant in the expansion tank (Figure 68).

   Note: The coolant level should be between the marks on the side of the tank.

   

   Figure 68

   1. Expansion tank

2. If the coolant is low, add the recommended replacement coolant as required. Do not use water only or alcohol-based coolants.Do not overfill.

3. Install the expansion-tank cap.

To prevent the engine from overheating, keep the hood screen and radiator clean. Check the screen and radiator for buildup of grass, dust, and debris, and if necessary, clean any debris off these parts; refer to Checking the Hood Screen and Radiator for Debris.

Note: If the PTO shuts off due to high engine temperature, first check the hood screen and radiator for an excessive buildup of debris. Clean the system before operating the machine. Do not shut off the engine immediately; allow the engine to cool by running it without a load.

Clean the radiator as follows:

1. Remove the hood.

2. Working from the fan side of the radiator, blow with low pressure, 172 kPa (25 psi), compressed air (do not use water). Repeat this step from the front of the radiator and again from the fan side.

3. After thoroughly cleaning the radiator, clean any debris that may have collected in the channel at the radiator base.

4. Clean the screen and install the hood onto the machine.

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

After the first 10 hours of operation, you should need to adjust the brakes only after considerable use thereafter. You can perform these periodic adjustments where the brake cable connects to the bottom of the brake pedals. When the cable is no longer adjustable, you can adjust the star nut on the inside of the brake drum to move the brake shoes outward. However, you will need to adjust the brake cables again to compensate for this adjustment.

1. Release the lock arm from the right-brake pedal so that both pedals operate independent of each other.

2. To reduce the free travel of the brake pedals, loosening the front jam nuts at the threaded end of the brake cable (Figure 69).

   

   Figure 69

   1. Rear jam nuts
   2. Front jam nuts

3. Rotate the rear jam nuts to move the cable rearward until the brake pedals have 13 mm to 25 mm (1/2 to 1 inch) of free travel.

4. When the free travel of the brake pedals is adjusted, tighten the front jam nuts.

1. Shut off the engine and remove the key from the key switch.

   Note: Do not engage the parking brake.

2. Remove the knob from the parking-brake rod and the screws from the steering-tower cover (Figure 70).

   

   Figure 70

   1. Steering-tower cover
   2. Parking-brake knob/rod
   3. Switch-mounting screws
   4. Cover-mounting screws

3. Slide the cover up the steering shaft to expose the parking brake switch (Figure 71).

4. Loosen the screws and nuts that secure the parking brake switch to the left side of the steering tower (Figure 70).

5. Align the paddle of the parking brake rod with the switch plunger (Figure 71).

   

   Figure 71

   1. Parking-brake interlock switch
   2. Paddle (parking-brake rod)

6. Press down on the parking-brake rod and push up the switch until the compressed length of the switch plunger is 0.7 mm (0.030 inches); refer to Figure 71.

   Note: This is the distance between the brake-rod paddle and the switch-plunger housing.

7. Tighten the switch-mounting screws and nuts.

8. With the parking brake engaged, use a multimeter to measure continuity through the switch; when the position of the switch is correct, you should measure continuity through switch circuit.

   Note: If there is no continuity, move the switch down slightly until there is continuity.

9. Check the operation of the parking brake interlock switch as follows:

   1. Engage the parking brake.

   2. Press the traction pedal while the engine is running and the PTO switch is in the OFF position; The parking brake interlock switch is operating correctly if the engine shuts off within 2 seconds.

      Important: If the engine does not stop, the interlock system is not operating correctly. You must repair the interlock system before operating the machine.

10. Install the steering-tower cover and brake-rod knob.

Check alternator belt for wear or damage.

Note: Replace the alternator belt if you find it worn or damaged.

Figure 72

1. Alternator
2. Mounting bolt

1. Apply 4.5 kg (10 lb) of force against the belt at a position midway between the pulleys.

   • If the belt deflects 10 mm (3/8 inch), the belt is properly tensioned.

   • If the belt deflects more than 10 mm (3/8 inch) or less than 10 mm (3/8 inch), proceed to step 2.

2. Loosen the mounting bolt for the alternator (Figure 72).

3. Increase or decrease the tension on the alternator belt and tighten the mounting bolt (Figure 72).

4. Repeat steps 1 through 3 until the belt tension is correct.

1. Shut off the engine, engage the parking brake, and remove the key from the switch.

2. Raise the engine hood and allow the engine to cool.

3. Adjust the air gap so that a 0.4 mm (0.015 inch) feeler gauge slides in between the clutch lining and friction plate with light pressure (Figure 74).

   Note: You can decrease the gap by turning the adjusting nut clockwise (Figure 74). The maximum service gap is 0.7 mm (0.030 inch). Adjust all 3 air gaps.

   

   Figure 74

   1. Clutch
   2. 0.4 mm (0.015 inch) air gap (3)
   3. Adjusting nut (3)
   4. Electrical connector
   5. PTO belt

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

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

The machines reservoir is filled at the factory with high quality hydraulic fluid.

Hydraulic system capacity: 5.6 L (6.0 qt)

Hydraulic fluid-type specification:

Alternate fluids: If the Toro fluid is not available, you may use other petroleum-based Universal Tractor Hydraulic Fluids (UTHF) provided that its specifications fall within the listed range for all the following material properties and that it meets industry standards. We do not recommend the use of 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.

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 No. 44-2500 from your authorized Toro distributor.