Titan® MR 4800 or MR 5400 Riding Mower

Use only clean, fresh (no more than 30 days old), fuel from a reputable source.

Use fuel stabilizer/conditioner in the machine to keep the fuel fresh longer when used as directed by the fuel-stabilizer manufacturer.

Important: Do not use fuel additives containing methanol or ethanol.

Add the amount of fuel stabilizer/conditioner to fresh fuel as directed by the fuel-stabilizer manufacturer.

1. Park the machine on a level surface.

2. Engage the parking brake.

3. Shut off the engine and remove the key.

4. Clean around the fuel-tank cap.

5. Fill the fuel tank until the fuel gauge reads at the full mark (Figure 7).

   Note: Do not fill the fuel tank completely full. The empty space in the tank allows the fuel to expand.

   

   Figure 7

The safety-interlock system is designed to prevent the engine from starting unless:

• The blade-control switch (PTO) is disengaged.

• The motion-control levers are in the NEUTRAL-LOCK position.

• The parking brake is engaged.

The safety-interlock system also is designed to shut off the engine whenever the control levers are out of the NEUTRAL-LOCK position and you rise from the seat.

Test the safety-interlock system before you use the machine each time. If the safety system does not operate as described below, have an Authorized Service Dealer repair the safety system immediately.

1. Sit on the seat, engage the parking brake, and move the blade-control switch (PTO) to the ON position. Try starting the engine; the engine should not crank.

2. Sit on the seat, engage the parking brake, and move the blade-control switch (PTO) to the OFF position. Move either motion-control lever (out of the NEUTRAL-LOCK position). Try starting the engine; the engine should not crank. Repeat for other control lever.

3. Sit on the seat, engage the parking brake, move the blade-control switch (PTO) to the OFF position, and move the motion-control levers to the NEUTRAL-LOCK position. Start the engine. While the engine is running, release the parking brake, engage the blade-control switch (PTO), and rise slightly from the seat; the engine should shut off.

4. Sit on the seat, engage the parking brake, move the blade-control switch (PTO) to the OFF position, and move the motion-control levers to NEUTRAL-LOCK position. Start the engine. While the engine is running, center either motion-control lever and move it forward or reverse; the engine should shut off. Repeat for other motion-control lever.

5. Sit on the seat, disengage the parking brake, move the blade-control switch (PTO) to the OFF position, and move the motion-control levers to NEUTRAL-LOCK position. Try starting the engine; the engine should not crank.

You can adjust the motion-control levers higher or lower for maximum comfort (Figure 11).

Figure 11

You can adjust the motion-control levers forward or rearward for your comfort.

1. Loosen the upper bolt holding the control lever to the control-arm shaft.

2. Loosen the lower bolt just enough to pivot the control lever forward or rearward.

   

   Figure 12

3. Tighten both bolts to secure the control lever in the new position.

4. Repeat the adjustment for the other control lever.

Park the machine on a level surface.

Figure 16

1. Pull the parking brake up.

To disengage the parking brake, pull the lever out of the detent slot and toward you, then push it down (Figure 17).

Figure 17

1. Push the parking brake out of the detent slot and toward you.
2. Push the parking brake down.

Note: The engine shuts off when you move the traction-control with the parking brake engaged.

To stop the machine, pull the motion-control levers to the NEUTRAL position.

1. Disengage the parking brake; refer to Disengaging the Parking Brake.

2. Move the levers to the center, unlocked position.

3. To go forward, slowly push the motion-control levers forward (Figure 26).

   

   Figure 26

1. Move the levers to the center, unlocked position.

2. To go backward, slowly pull the motion-control levers rearward (Figure 27).

   

   Figure 27

For best mowing and maximum air circulation, operate the engine at the FAST position. Air is required to thoroughly cut grass clippings, so do not set the height-of-cut so low as to totally surround the mower deck in uncut grass. Always try to have 1 side of the mower deck free from uncut grass, which allows air to be drawn into the mower deck.

Cut grass slightly longer than normal to ensure that the cutting height of the mower deck does not scalp any uneven ground. However, the cutting height used in the past is generally the best one to use. When cutting grass longer than 15 cm (6 inches) tall, you may want to cut the lawn twice to ensure an acceptable quality of cut.

It is best to cut only about a third of the grass blade. Cutting more than that is not recommended unless grass is sparse, or it is late fall when grass grows more slowly.

Alternate the mowing direction to keep the grass standing straight. This also helps disperse clippings, which enhances decomposition and fertilization.

Grass grows at different rates at different times of the year. To maintain the same cutting height, mow more often in early spring. As the grass growth rate slows in mid summer, mow less frequently. If you cannot mow for an extended period, first mow at a high cutting height, then mow again 2 days later at a lower height setting.

To improve cut quality, use a slower ground speed in certain conditions.

When mowing uneven turf, raise the cutting height to avoid scalping the turf.

If you must stop the forward motion of the machine while mowing, a clump of grass clippings may drop onto your lawn. To avoid this, move onto a previously cut area with the blades engaged or you can disengage the mower deck while moving forward.

Clean clippings and dirt from the underside of the mower deck after each use. If grass and dirt build up inside the mower deck, cutting quality will eventually become unsatisfactory.

Maintain a sharp blade throughout the cutting season because a sharp blade cuts cleanly without tearing or shredding the grass blades. Tearing and shredding turns grass brown at the edges, which slows growth and increases the chance of disease. Check the mower blades after each use for sharpness, and for any wear or damage. File down any nicks and sharpen the blades as necessary. If a blade is damaged or worn, replace it immediately with a genuine Toro replacement blade.

1. Park the machine on a level surface, disengage the blade-control switch, and engage the parking brake.

2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position.

3. Locate the bypass levers on the frame on both sides of the engine.

4. Move the bypass levers forward through the slotted hole and down to lock them in place (Figure 30).

   Note: Do this for each lever.

5. Disengage the parking brake.

   

   Figure 30

   1. Bypass-lever locations
   2. Lever position for operating the machine
   3. Lever position for pushing the machine

6. When finished, engage the parking brake.

Move the bypass levers rearward through the keyhole and down to lock them in place as shown in Figure 30.

Note: Do this for each lever.

1. If using a trailer, connect it to the towing vehicle and connect the safety chains.

2. If applicable, connect the trailer brakes and lights.

3. Lower the ramp, ensuring that the angle between the ramp and the ground does not exceed 15 degrees (Figure 31).

4. Back the machine up the ramp (Figure 32).

   

   Figure 32

   1. Back the machine up the ramp.
   2. Drive the machine forward down the ramp.

5. Shut off the engine, remove the key, and engage the parking brake.

6. Tie down the machine near the front caster wheels and the rear frame with straps, chains, cable, or ropes (Figure 33). Refer to local regulations for tie-down requirements.

   

   Figure 33

   1. Tie-down points

1. Lower the ramp, ensuring that the angle between the ramp and the ground does not exceed 15 degrees (Figure 31).

2. Drive the machine forward down the ramp (Figure 32).

1. Park the machine on a level surface, disengage the blade-control switch, and engage the parking brake.

2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position.

3. Clean around the air-cleaner cover to prevent dirt from getting into the engine and causing damage.

4. Release the retaining clamps on the air cleaner and pull the air-cleaner cover off the air-cleaner body

   

   Figure 34

   1. Cover
   2. Retaining clamp

5. Separate the foam and paper elements (Figure 35).

   

   Figure 35

   1. Paper element
   2. Foam element

1. Wash the foam element in liquid soap and warm water. When the element is clean, rinse it thoroughly.

2. Dry the element by squeezing it in a clean cloth.

   Important: Replace the foam element if it is torn or worn.

3. Lightly oil the foam element using new engine oil and squeeze out any excess oil.

1. Clean the paper element by tapping it gently to remove dust.

   Note: If it is very dirty, replace the paper element with a new one.

2. Inspect the element for tears, an oily film, or damage to the rubber seal.

3. Replace the paper element if it is damaged.

   Important: Do not clean the paper filter.

1. Install the foam pre-cleaner element over the paper element.

   Note: Ensure that you do not damage the elements.

2. Install the air-cleaner elements onto the air-cleaner base.

3. Install the cover and secure it with the retaining clamps (Figure 34).

Oil Type: Detergent oil (including synthetic) of API service SJ or higher

Crankcase Capacity: 1.9 L (64 fl oz) with oil filter

Viscosity: See the table below.

Figure 36

Note: Check the oil when the engine is cold.

Important: If you overfill or underfill the engine crankcase with oil and run the engine, you may damage the engine.

1. Park the machine on a level surface, disengage the blade-control switch, and engage the parking brake.

2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position.

   Note: Ensure that the engine is cool so that the oil has had time to drain into the sump.

3. To keep dirt, grass clippings, etc., out of the engine, clean the area around the oil-fill cap and dipstick before removing it (Figure 37).

Figure 37

1. Park the machine on a level surface, disengage the blade-control switch, and engage the parking brake.

2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position.

3. Drain the oil from the engine (Figure 38).

   

   Figure 38

4. Change the engine-oil filter (Figure 39).

   Note: Ensure that the oil-filter gasket touches the engine and then turn the filter an extra 3/4 turn.

   

   Figure 39

5. Slowly pour approximately 80% of the specified oil into the filler tube and slowly add the additional oil to bring it to the Full mark (Figure 40).

   

   Figure 40

6. Dispose of the used oil at a recycling center.

1. Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake.

2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position.

3. Clean the area around the base of the plug to keep dirt and debris out of the engine.

4. Remove the spark plug (Figure 41).

   

   Figure 41

Important: Do not clean the spark plug(s). Always replace the spark plug(s) when it has a black coating, worn electrodes, an oily film, or cracks.

If you see light brown or gray on the insulator, the engine is operating properly. A black coating on the insulator usually means the air cleaner is dirty.

Set the gap to 0.75 mm (0.03 inch).

Figure 42

1. Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake.

2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position.

3. Loosen the 2 fasteners on the battery cover counterclockwise 1/4 turn, and remove the battery cover (Figure 45).

   

   Figure 45

   1. Battery cover
   2. Fasteners

4. Disconnect the negative (black) ground cable from the battery post (Figure 46).

   Note: Retain all fasteners.

5. Slide the rubber cover up the positive (red) cable.

6. Disconnect the positive (red) cable from the battery post (Figure 46).

   Note: Retain all fasteners.

7. Remove the battery hold-down (Figure 46), and lift the battery from the battery tray.

   

   Figure 46

   1. Battery
   2. Negative (–) battery post
   3. Bolt, washer, and nut for the negative (–) battery post
   4. Bolt, washer, and nut for the positive (+) battery post
   5. Positive (+) battery post
   6. Terminal boot
   7. Battery hold-down

1. Remove the battery from the chassis; refer to Removing the Battery.

2. Charge the battery for a minimum of 1 hour at 6 to 10 A.

   Note: Do not overcharge the battery.

3. When the battery is fully charged, unplug the charger from the electrical outlet, then disconnect the charger leads from the battery posts (Figure 47).

   

   Figure 47

   1. Positive (+) battery post
   2. Negative (–) battery post
   3. Red (+) charger lead
   4. Black (–) charger lead

1. Position the battery in the tray (Figure 46).

2. Using the fasteners previously removed, install the positive (red) battery cable to the positive (+) battery terminal.

3. Using the fasteners previously removed, install the negative battery cable to the negative (-) battery terminal.

4. Slide the red terminal boot onto the positive (red) battery post.

5. Secure the battery with the hold-down (Figure 46).

6. Install the battery cover by pushing down and tightening the 2 fasteners clockwise (Figure 45).

1. Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake.

2. Shut off the engine, remove the key, and disconnect the spark-plug wires from the spark plugs.

1. Inspect the cutting edges (Figure 54).

2. If the edges are not sharp or have nicks, remove and sharpen the blade; refer to Sharpening the Blades.

3. Inspect the blades, especially in the curved area.

4. If you notice any cracks, wear, or a slot forming in this area, immediately install a new blade (Figure 54).

   

   Figure 54

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

Note: The machine must be on a level surface for the following procedure.

1. Raise the mower deck to the highest height-of-cut position.

2. While wearing thickly padded gloves, or other adequate hand protection, slowly rotate the blade into a position that allows you to measure the distance between the cutting edge and the level surface the machine is on (Figure 55).

   

   Figure 55

   1. Deck
   2. Spindle housing
   3. Blade

3. Measure from the tip of the blade to the flat surface (Figure 56).

   

   Figure 56

   1. Blade (in position for measuring)
   2. Level surface
   3. Measured distance between blade and the surface (A)

4. Rotate the same blade 180 degrees so that the opposing cutting edge is now in the same position (Figure 57).

   

   Figure 57

   1. Blade (side previously measured)
   2. Measurement (position used previously)
   3. Opposing side of blade being moved into measurement position

5. Measure from the tip of the blade to the flat surface (Figure 58).

   Note: The variance should be no more than 3 mm (1/8 inch).

   

   Figure 58

   1. Opposite blade edge (in position for measuring)
   2. Level surface
   3. Second measured distance between blade and surface (B)

   1. If the difference between A and B is greater than 3 mm (1/8 inch), replace the blade with a new blade; refer to Removing the Blades and Installing the Blades.

      Note: If a bent blade is replaced with a new blade, and the dimension obtained continues to exceed 3 mm (1/8 inch), the blade spindle could be bent. Contact an Authorized Service Dealer for service.

   2. If the variance is within constraints, move to the next blade.

6. Repeat this procedure on each blade.

Replace the blades if they hit a solid object, or if the blade is out of balance or bent.

1. Hold the blade end using a rag or thickly padded glove.

2. Remove the blade bolt, curved washer, and blade from the spindle shaft (Figure 59).

   

   Figure 59

   1. Sail area of the blade
   2. Blade
   3. Curved washer
   4. Blade bolt

1. Use a file to sharpen the cutting edge at both ends of the blade (Figure 60).

   Note: Maintain the original angle.

   Note: The blade retains its balance if the same amount of material is removed from both cutting edges.

   

   Figure 60

   1. Sharpen at original angle.

2. Check the balance of the blade by putting it on a blade balancer (Figure 61).

   Note: If the blade stays in a horizontal position, the blade is balanced and can be used.

   Note: If the blade is not balanced, file some metal off the end of the sail area only (Figure 60).

   

   Figure 61

   1. Blade
   2. Balancer

3. Repeat this procedure until the blade is balanced.

1. Install the blade onto the spindle shaft (Figure 59).

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

2. Install the curved washer (cupped side toward the blade) and the blade bolt (Figure 59).

3. Torque the blade bolt to 135 to 150 N∙m (100 to 110 ft-lb).

   

   Figure 62

   1. Sail area of the blade
   2. Blade
   3. Curved washer
   4. Blade bolt

1. Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake.

2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position.

3. Set the height of cut to 76 mm (3 inches).

4. Carefully rotate the blades side to side.

5. Measure between the outside cutting edges and the flat surface (Figure 63).

   Note: If both measurements are not within 5 mm (3/16 inch), an adjustment is required; refer to Leveling the Mower Deck.

   

   Figure 63

   1. Blades side to side
   2. Outside cutting edges
   3. Measure from the tip of the blade to the flat surface here.

Check the front-to-rear blade level any time you install the mower. If the front of the mower is more than 7.9 mm (5/16 inch) lower than the rear of the mower, adjust the blade level.

1. Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake.

2. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position.

3. Set the height of cut to 76 mm (3 inches).

4. Carefully rotate the blades so they are facing front to rear (Figure 64).

5. Measure from the tip of the front blade to the flat surface and the tip of the rear blade to the flat surface (Figure 64).

   Note: If the front blade tip is not 1.6 to 7.9 mm (1/16 to 5/16 inch) lower than the rear blade tip, continue to the Leveling the Mower Deck procedure.

   

   Figure 64

   1. Blades front to rear
   2. Outside cutting edges
   3. Measure from the tip of the blade to the flat surface here.

1. Set the anti-scalp rollers to the top holes or remove them completely for this procedure; refer to Adjusting the Anti-Scalp Rollers.

2. Set the height-of-cut lever to the 76 mm (3 inch) position; refer to Adjusting the Height of Cut.

3. Place 2 blocks, each having a thickness of 6.6 cm (2-5/8 inches), under each side of the front edge of the deck but not under the anti-scalp roller brackets (Figure 65).

4. Place 2 blocks, each having a thickness of 7.3 cm (2-7/8 inches), under the rear edge of the cutting deck skirt, 1 on each side of the cutting deck (Figure 65).

   

   Figure 65

   1. Wood block—6.6 cm (2-5/8 inches) thick
   2. Wood block—7.3 cm (2-7/8 inches) thick
   3. Front edge

5. Loosen the adjustment bolts on all 4 corners so that the deck is sitting securely on all 4 blocks (Figure 66).

   

   Figure 66

   1. Deck-lift arm
   2. Chain
   3. Hook
   4. Adjustment bolt

6. Ensure that there is tension on all 4 chains (Figure 66).

7. Tighten the 4 adjustment bolts (Figure 66).

8. Ensure that the blocks fit snugly under the deck skirt and that all bolts are tight.

9. Verify that the deck is level by checking the side-to-side level and front-to-rear blade slope; repeat the deck leveling procedure if necessary.