Toro GrandStand 74578 User Manual (English)

Questions and Answers:

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duncanryanAug 4, 2025
How to troubleshoot starting issues with my Toro GrandStand 74578?
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  Matthew MyersAug 5, 2025
  If your Toro Lawn Mower engine won't start, starts with difficulty, or stops running, several factors could be at play. First, ensure the fuel tank isn't empty and the shut-off valve is open by filling the tank and opening the valve. Then, make sure the choke is engaged by moving the choke lever to the choke position. Check that the spark plug wire is securely connected to the spark plug. Inspect the spark plug itself; if it's damaged or improperly gapped, replace it with a new one. Also, a dirty air cleaner can cause issues, so service the air cleaner element. Finally, a clogged fuel filter can be the culprit, so replace it if necessary.
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Nicole HarrisAug 9, 2025
Why is my Toro GrandStand 74578 Lawn Mower losing power?
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  Sharon SmithAug 9, 2025
  If your Toro Lawn Mower engine is losing power, it could be due to several reasons. Start by reducing the ground speed, as the engine load might be excessive. Check the air cleaner and service it if it's dirty. Ensure the oil level in the crankcase is adequate; add oil if it's low. Clear any obstructions from the cooling fins and air passages under the engine blower housing. Replace the spark plug if it's pitted, fouled, or has an incorrect gap. Clean or replace the fuel cap if the vent hole is plugged. Also, replace the fuel filter if it's dirty.
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Gregory KellerAug 13, 2025
How to fix uneven cutting height on my Toro GrandStand 74578?
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  Chad HernandezAug 13, 2025
  If your Toro Lawn Mower's cutting height is uneven, several factors could be the cause. Start by sharpening the blades if they are dull. Replace the cutting blades if they are bent. Level the mower deck from side to side and adjust the front-to-rear pitch. Clean the underside of the mower deck if it's dirty. Finally, adjust the tire pressure to the correct level.
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jose24Aug 17, 2025
What to do if my Toro Lawn Mower has abnormal vibration?
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  Pamela CardenasAug 17, 2025
  If your Toro Lawn Mower is vibrating abnormally, it could be due to several reasons. Check the cutting blades; if they are bent or unbalanced, replace them. Ensure the blade mounting bolt is tightened securely. Also, check the engine mounting bolts and tighten them if they are loose. Inspect the engine pulley, idler pulley, or blade pulley and tighten any loose ones.
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khoodAug 21, 2025
Why is my Toro GrandStand 74578 Lawn Mower engine overheating?
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  sharonsmithAug 21, 2025
  If your Toro Lawn Mower engine is overheating, it could be due to a few reasons. First, reduce the ground speed because the engine load might be excessive. Second, ensure the oil level in the crankcase is sufficient; add oil if it's low. Finally, check the cooling fins and air passages under the engine blower housing and remove any obstructions.
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David FoxAug 26, 2025
What to do if my Toro GrandStand 74578 Lawn Mower does not drive?
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  Sylvia AdamsAug 26, 2025
  If your Toro Lawn Mower does not drive, it could be due to several reasons. Check the hydraulic oil reservoir and add hydraulic oil if it's low. Bleed the air out of the hydraulic system. Replace the pump drive belt if it's slipping. Replace the pump drive belt idler spring if it's missing. Tighten the by-pass valves to a torque of 12 to 15 N-m (9 to 11 ft-lb) if the pump by-pass valves are open.
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April SilvaAug 30, 2025
Why blades do not rotate on my Toro Lawn Mower?
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  Grant CarrilloAug 30, 2025
  If the blades on your Toro Lawn Mower aren't rotating, check the belt tension of the pump drive belt. Install the drive belt and check adjusting shafts and belt guides for correct position if the pump drive belt is off the pulley. Install a new deck belt if the mower deck belt is worn, loose, or broken. Install the deck pulley and check the idler pulley, idler arm, and spring for correct position and function if the mower deck belt is off the pulley. Replace the spring if the idler spring is broken or missing. Adjust the clutch air gap if the electric clutch is out of adjustment.

Toro GrandStand 74578 Specifications

General

Cutting Width	52 inches
Transmission	Hydrostatic
Spindle Material	Cast aluminum
Deck Material	7-gauge steel
Blade Tip Speed	18, 500 fpm
Caster Tires	11 x 4.00-5
Drive Tires	20 x 10.00-8
Cutting Height	1.5 - 5 inches