Toro 30403 - User Manual

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FormNo.3364-859RevA

Base62inand72inMower

Groundsmaster

®

3320/3280-DTractionUnit

ModelNo.30403—SerialNo.280000001andUp

ModelNo.30404—SerialNo.280000001andUp

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

Table of Contents

Questions and Answers:

B
Brandon NicholsAug 25, 2025
What to do if the hydraulic fluid foams excessively in my Toro Lawn Mower?
- S
  Sean RamosAug 25, 2025
  Excessive foaming of hydraulic fluid can stem from several causes. The hydraulic fluid level in the reservoir may be low, the system may contain the wrong type of fluid, there may be an air leak in a pump suction line, incompatible hydraulic fluids might be mixed, or there could be water in the hydraulic system. To resolve this, fill the hydraulic fluid reservoir to the appropriate level, change the hydraulic fluid to the correct type, inspect and repair the pump suction line for air leaks, drain the system and refill with compatible hydraulic fluid, or drain the system and remove the water.
H
Heather ThomasAug 29, 2025
Why does the cutting deck drop on my Toro Lawn Mower?
- M
  Matthew HooverAug 29, 2025
  If the cutting deck (or implement) raises but does not stay up, it could be due to several reasons: the lift cylinder may be leaking internally, the lift circuit hydraulic lines or fittings may be leaking, the lift control valve may be leaking, air may exist in the lift circuit, or the solenoid valve (SV2) in the lift control valve may be damaged or leaking. Suggested solutions include: repair or replace the lift cylinder, inspect and repair the lift circuit hydraulic lines or fittings, repair or replace the lift control valve, bleed the air from the lift circuit, or repair or replace the solenoid valve (SV2).
S
Sherri BradyAug 31, 2025
How to fix jerky traction when starting my Toro 30403?
- W
  William DawsonAug 31, 2025
  Jerky traction when starting your Toro Lawn Mower can be attributed to a few potential issues. The friction wheel on the traction pedal might be out of adjustment or worn, except for 3280-D Models 30344 and 30345. Alternatively, the traction control linkage could be incorrectly adjusted, disconnected, binding, or damaged. Lastly, the hydrostat/hydraulic pump check valve may not be seating or could be damaged. Consider adjusting or replacing the friction wheel, adjusting or repairing the traction control linkage, or repairing or replacing the hydrostat/hydraulic pump check valve.
S
Shelly GarciaSep 1, 2025
Why is the traction response sluggish on my Toro Lawn Mower?
- J
  John OwensSep 1, 2025
  A sluggish traction response on your Toro Lawn Mower can be caused by an open or damaged hydraulic pump bypass valve (3280-D Models 30344 and 30345), a dragging or binding brake, brakes that are not released, low charge pressure, very cold hydraulic fluid, a hydrostat/hydraulic pump check valve that is not seating or is damaged, or a worn or damaged hydrostat/hydraulic pump. To resolve this, inspect and repair the hydraulic pump bypass valve, inspect and repair the brakes, release the brakes, check and adjust the charge pressure, warm up the hydraulic fluid, or repair or replace the hydrostat/hydraulic pump check valve, or repair or replace the hydrostat/hydraulic pump.
B
Brian ManningSep 3, 2025
What causes hydraulic fluid to leak from my Toro Lawn Mower?
- B
  bobdillonSep 3, 2025
  Hydraulic fluid leaks in your Toro Lawn Mower system can be attributed to loose or damaged fittings, hoses, or tubes, or missing or damaged O-rings or seals. To address this, tighten or replace any loose or damaged fittings, hoses, or tubes, and replace any missing or damaged O-rings or seals.
M
Monica ChenSep 4, 2025
How to fix hydraulic oil leaks in Toro Lawn and Garden Equipment?
- R
  Roy PrattSep 4, 2025
  If you notice hydraulic oil leaks in your Toro Lawn and Garden Equipment, it could be due to loose or damaged fittings, hoses, or tubes. Try tightening or replacing these components. Alternatively, missing or damaged O-rings or seals could be the cause; in this case, replace the affected O-rings or seals.
L
Laura AbbottSep 7, 2025
What to do if there is no traction in either direction on Toro Lawn and Garden Equipment?
- M
  Michelle BakerSep 8, 2025
  If your Toro Lawn and Garden Equipment shows no traction in either direction, start by ensuring the brakes are released. Check the oil level in the reservoir and fill if low. Other potential issues include a hydrostat check valve that is not seating or is damaged (repair or replace it), low charge pressure (increase it), a damaged transmission drive shaft or key (repair or replace it), a worn or damaged hydrostat (repair or replace it), or a damaged front axle (repair or replace it).
E
Evan SmithSep 9, 2025
Why cutting deck (or implement) will not lift or lifts slowly on Toro Lawn and Garden Equipment?
- R
  Robert GarrettSep 9, 2025
  If the cutting deck (or implement) on your Toro Lawn and Garden Equipment will not lift or lifts slowly, potential causes include low engine speed (increase it) or excessive debris buildup in the cutting chambers (clear the debris). Also, check for binding lift arms (inspect and repair), a binding or broken lift valve control linkage (repair or replace), or binding lift cylinders (inspect and repair). Additionally, a low oil level in the reservoir (fill to the proper level), insufficient charge pump pressure or flow (increase it), a stuck or damaged implement relief valve (repair or replace), a damaged lift control valve (repair or replace), or internal leaks in the lift cylinder (repair or replace) could be the reason.
K
Kenneth BrooksSep 12, 2025
Why is steering inoperative or sluggish on my Toro Lawn and Garden Equipment?
- J
  Jasmine JohnsonSep 12, 2025
  If you are experiencing steering issues with your Toro Lawn and Garden Equipment, such as inoperative or sluggish steering, several factors could be responsible. Start by ensuring the engine speed is adequate; if it's too low, increase it. Also, verify that the oil level in the reservoir is sufficient; if it's low, fill it. Other potential causes include worn or binding steering components (inspect and repair), a binding steering cylinder (inspect and repair), a stuck or damaged implement relief valve (repair or replace), a worn or damaged steering control valve (repair or replace), internal leaks in the steering cylinder (repair or replace), or low charge pump flow or pressure (increase it).
S
Sharon DanielSep 12, 2025
What to do if cutting deck (or implement) raises, but will not stay up on Toro Lawn and Garden Equipment?
- A
  Abigail PottsSep 12, 2025
  If the cutting deck (or implement) on your Toro Lawn and Garden Equipment raises but doesn't stay up, it could be due to a lift cylinder that leaks internally, or a lift control valve that leaks. In either case, repair or replace the affected component.

Toro 30403 Specifications

General

Power Source	Gasoline
Deck Material	Steel
Starter Type	Recoil
Mulching Capability	Yes
Bagging Capability	Yes
Side Discharge Capability	Yes
Type	Walk-Behind Lawn Mower
Wheel Size (front)	8 inches

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