Steering Circuit Problems
Problem
Possible Cause
Steering inoperative or sluggish
Steering components (e.g. tie rods, steering cylinder ends) are
worn or binding.
Steering cylinder is binding.
Oil level in hydraulic reservoir is low (NOTE: other hydraulic sys-
tems are affected as well).
Steering relief valve in steering control valve is stuck or damaged.
Steering cylinder leaks internally.
Steering control valve is worn or damaged.
Gear pump section is worn or damaged (NOTE: a worn or dam-
aged gear pump section will also affect the lift and traction (charge)
circuits).
Engine Cooling Fan Circuit Problems
Problem
Possible Cause
Cooling fan runs only in forward di-
rection (fan does not run in reverse
direction).
Fan control manifold solenoid cartridge valve (S1) is faulty.
Electrical problem exists that prevents fan control manifold solenoid
valve (S1) operation (see Chapter 5 -- Electrical System).
Cooling fan does not rotate.
Fan motor is worn or damaged.
Gear pump section for engine cooling fan circuit is worn or damaged.
Fan control manifold cartridge valve seals are leaking.
Cooling fan always rotates at slow
speed.
Check valve in fan control manifold is not seating.
Fan control manifold proportional relief valve (PRV) is stuck open.
Hydraulic fan motor is worn or damaged.
Cooling fan always rotates at fast
speed.
Fan control manifold proportional relief valve (PRV) is faulty.
Electrical problem exists that prevents fan control manifold propor-
tional relief valve (PRV) operation (see Chapter 5 -- Electrical Sys-
tem).
Hydraulic System
Page 4 -- 34
Groundsmaster 4000--D/4010--D
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Tags | Toro Groundsmaster 10176SL, Toro Groundsmaster 30446, Toro Groundsmaster 30448, Toro Groundsmaster 4010 D |
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| Document Type | Catalog |
| Language | English |
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