Toro 03691 - User Manual

Questions and Answers:

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Janet BurgessSep 13, 2025
Why is the traction response sluggish on my Toro 03691?
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  Billy FinleySep 13, 2025
  If the traction response on your Toro Lawn Mower is sluggish, identify and correct the causes affecting traction response. This may be due to low charge pressure, very cold hydraulic oil, the parking brake dragging or binding, a loosened traction pump bypass valve, a damaged flushing valve in the traction pump, a damaged piston pump charge relief valve, a damaged piston pump check relief valve, or a worn or damaged piston pump.
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rubiobradySep 12, 2025
Why won't the front cutting unit motors operate on my Toro 03691 Lawn Mower, but the rear ones will?
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  Laura CoxSep 12, 2025
  If the front cutting unit motors on your Toro Lawn Mower will not operate but the rear cutting unit motors will operate, test and replace solenoid valve MSV2 if necessary, ensure the mow/backlap lever is fully rotated, and check for electrical issues. This issue may arise if solenoid valve MSV2 on the mow control manifold is faulty, the mow/backlap lever for the front cutting units (MR2) is not rotated fully, an electrical problem exists that prevents the MSV2 solenoid coil on the mow control manifold from being energized, the front cutting reel(s) is binding, or gear pump section (P2) is worn or damaged.
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Michael LoveSep 12, 2025
What to do if the cutting units raise but will not remain in the raised position on my Toro 03691 Lawn Mower?
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  mary65Sep 12, 2025
  If the cutting units on your Toro Lawn Mower raise, but will not remain in the raised position, inspect and repair the lift cylinder and check valves. This can happen if the lift cylinder leaks internally, the check valve in the lift control manifold (CV1, CV4, CV5 and CV23) and solenoid valve (SV1 and SV3) leaks, or the pilot piston in the lift control manifold is stuck and is preventing the check valve from seating.
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lozanooscarSep 12, 2025
Why won't the rear cutting unit motors operate on my Toro 03691 Lawn Mower, but the front ones will?
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  John GalvanSep 12, 2025
  If the rear cutting unit motors on your Toro Lawn Mower will not operate but the front cutting unit motors will operate, test and replace solenoid valve MSV1 if necessary, ensure the mow/backlap lever is fully rotated, and check for electrical issues. This problem may occur if solenoid valve MSV1 on the mow control manifold is faulty, the mow/backlap lever for the rear cutting units (MR1) is not rotated fully, an electrical problem exists that prevents the MSV1 solenoid coil from being energized, the rear cutting reel(s) is binding, or gear pump section (P1) is worn or damaged.
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Guy OrtegaSep 9, 2025
Why is the hydraulic fluid foaming in my Toro 03691?
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  Caroline BerrySep 9, 2025
  If the hydraulic fluid in your Toro Lawn Mower is foaming, correct the oil level, check the type of oil, and fix any air leaks in the pump suction line. This issue may arise if the oil level in the hydraulic reservoir is low, the hydraulic system has the wrong kind of oil, or the pump suction line has an air leak.
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Tyler WilsonAug 23, 2025
Why is hydraulic fluid leaking from my Toro Lawn Mower system?
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  Whitney ScottAug 23, 2025
  Hydraulic fluid might be leaking from your Toro Lawn Mower due to several reasons. The fitting(s), hose(s), or tube(s) may be loose or damaged; in this case, you should check and tighten or replace them. Also, the O-ring(s) or seal(s) may be missing or damaged, requiring replacement.
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Stephanie FlynnSep 8, 2025
What to do if there is no traction in either direction on my Toro 03691?
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  westchristinaSep 8, 2025
  If you have no traction in either direction with your Toro Lawn Mower, locate the cause of the trouble and correct it. Potential causes include the parking brake dragging or binding, misadjusted or damaged traction control linkage, low oil level in the hydraulic reservoir, a loosened traction pump bypass valve, a damaged flushing valve in the traction pump, a damaged piston pump check valve, low charge pressure, or worn or damaged wheel motor(s) and/or piston pump.
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Danielle RaySep 7, 2025
Why is the hydraulic system on my Toro Lawn Mower operating hot?
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  Amber RothSep 7, 2025
  If the hydraulic system on your Toro Lawn Mower is operating hot, stop the machine, turn off the engine, and locate the cause of the trouble and correct it. This could be due to high traction system pressure, low oil level in the hydraulic reservoir, contaminated or light hydraulic oil, low engine speed, a damaged or plugged oil cooler, obstructed airflow through the oil cooler, a plugged oil filter, low charge pressure, or an open or faulty piston pump bypass valve.
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patrick18Sep 6, 2025
What causes one cutting reel lowers very slowly on my Toro 03691?
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  Karen HuertaSep 6, 2025
  If one cutting reel on your Toro Lawn Mower lowers very slowly or not at all, it could be due to: a binding lift arm or lift cylinder for the affected cutting reel (inspect and fix), a damaged lift cylinder for the affected cutting reel (inspect and repair or replace), a plugged, stuck, or damaged flow control orifice in the lift control manifold for the affected cutting reel (inspect and clean or replace), or a stuck or damaged check valve in the lift control manifold (CV1, CV4, CV5, and CV23) (inspect and repair or replace).
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Andrew FieldsSep 5, 2025
What causes one or more cutting unit does not stay up on my Toro 03691?
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  Scott CamposSep 5, 2025
  If one or more cutting units on your Toro Lawn Mower raises but doesn't stay up, it could be due to: leaking lift circuit hydraulic lines or fittings (inspect and repair), air in the lift circuit (bleed the air), a lift cylinder for the affected cutting reel(s) that leaks internally (inspect and repair), a leaking check valve in the lift control manifold (CV1, CV4, CV5, and CV23) (inspect and repair or replace), or a stuck or damaged pilot piston in the lift control manifold (inspect and repair or replace).