Toro GrandStand 74550 User Manual

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FormNo.3365-450RevA

GrandStand

®

Mower

Witha48in,52inor60inTURBOFORCE

®

CuttingUnit

ModelNo.74538—SerialNo.310000001andUp

ModelNo.74539—SerialNo.310000001andUp

ModelNo.74548—SerialNo.310000001andUp

ModelNo.74549—SerialNo.310000001andUp

ModelNo.74550—SerialNo.310000001andUp

ModelNo.74551—SerialNo.310000001andUp

ModelNo.79548—SerialNo.310000001andUp

ModelNo.79549—SerialNo.310000001andUp

ModelNo.79551—SerialNo.310000001andUp

ToregisteryourproductordownloadanOperator'sManualorPartsCatalogatnocharge,gotowww.Toro.com.OriginalInstructions(EN)

Table of Contents

Questions and Answers:

H
hhillAug 18, 2025
How to troubleshoot starting issues with my Toro Lawn Mower?
- J
  Jonathan SimmonsAug 18, 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.
D
Donna CoffeyAug 20, 2025
Why will my Toro Lawn Mower engine not start?
- C
  Craig WhitakerAug 20, 2025
  Your Toro Lawn Mower engine might not start due to several reasons. The fuel tank could be empty, or the shut-off valve might be closed; in this case, fill the fuel tank with gasoline and open the valve. The choke might not be on; move the choke lever to the choke position. The spark plug wire could be loose or disconnected; install the wire on the spark plug. The spark plug might be pitted, fouled, or have an incorrect gap; install a new, correctly gapped spark plug. The air cleaner might be dirty; service the air cleaner element. There might be dirt in the fuel filter; replace the fuel filter.
H
Heather UnderwoodAug 23, 2025
Why is my Toro Lawn Mower losing power?
- T
  thomasleAug 23, 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.
C
Christina HoffmanAug 26, 2025
How to fix uneven cutting height on my Toro Lawn Mower?
- D
  David ChenAug 26, 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.
B
brent98Aug 28, 2025
What to do if my Toro GrandStand 74550 engine loses power?
- F
  fbaileyAug 28, 2025
  If your Toro Lawn Mower engine loses power, there are several potential causes. The engine load may be excessive; reduce the ground speed. The air cleaner may be dirty; service the air cleaner. The oil level in the crankcase may be low; add oil to the crankcase. Cooling fins and air passages under the engine blower housing may be plugged; remove the obstruction from the cooling fins and air passages. The spark plug may be pitted, fouled, or the gap may be incorrect; install a new, correctly gapped spark plug. The vent hole in the fuel cap may be plugged; clean or replace the fuel cap. There may be dirt in the fuel filter; replace the fuel filter.
D
david30Aug 30, 2025
Why aren't the blades rotating on my Toro Lawn Mower?
- R
  Regina ScottAug 30, 2025
  The blades on your Toro Lawn Mower might not be rotating due to several reasons. The pump drive belt could be worn, loose, or broken; check the belt tension. The pump drive belt could be off the pulley; install the drive belt and check adjusting shafts and belt guides for correct position. The mower deck belt could be worn, loose, or broken; install a new deck belt. The mower deck belt could be off the pulley; install the deck pulley and check the idler pulley, idler arm, and spring for correct position and function. The idler spring could be broken or missing; replace the spring. The electric clutch could be out of adjustment; adjust the clutch air gap.
M
Mario YoungSep 2, 2025
What to do if my Toro Lawn Mower has abnormal vibration?
- D
  Deborah RodriguezSep 2, 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.
K
Katrina RamosSep 4, 2025
Why is my Toro Lawn Mower engine overheating?
- O
  Omar BarkerSep 4, 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.
A
alvarezbelindaSep 7, 2025
What to do if my Toro GrandStand 74550 Lawn Mower does not drive?
- M
  Matthew McgrathSep 7, 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.
S
Stephanie KrauseSep 9, 2025
Why blades do not rotate on my Toro GrandStand 74550?
- G
  George GreenSep 9, 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 74550 Specifications

General

Spindle Material	Cast Iron
Caster Tires	13 x 6.5-6
Cutting Height	1.5 - 5 inches
Transmission	Hydrostatic
Deck Type	Fabricated

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