Toro Groundsmaster 4100-D Service Manual page 63

Problem
Four wheel drive will not engage.
Four wheel drive will not disengage.
Cutting decks will not operate.
One cutting deck motor will not oper-
ate.
All cutting deck motors operate
slowly.
Cutting deck stops under load.
Cutting deck will not raise.
Cutting deck raises, but will not stay
up.
Groundsmaster 4100--D
Possible Causes
Electrical problem exists (see Chapter 5 -- Electrical System).
Solenoid valve on 4WD hydraulic manifold is faulty.
Cartridge valve in 4WD manifold is damaged or sticking.
Rear axle motor is damaged.
Electrical problem exists (see Chapter 5 -- Electrical System).
Solenoid valve on 4WD hydraulic manifold is faulty.
Cartridge valve in 4WD manifold is damaged or sticking.
Electrical problem exists (see Chapter 5 -- Electrical System).
Gear pump or it's coupler is damaged.
Electrical problem exists (see Chapter 5 -- Electrical System).
System pressure to the affected motor is low.
Key on affected deck motor is damaged (motor rotates but deck
blades don't rotate).
Solenoid valve in deck manifold is faulty.
Cartridge valve in deck manifold is damaged or sticking.
Deck motor or gear pump section is damaged.
Engine RPM is low.
Deck motor or gear pump section is damaged.
Relief valve in deck manifold is by--passing.
Deck motor has internal leakage (by--passing oil).
Cutting deck gear pump section is inefficient.
Engine RPM is too low.
Hydraulic oil level in reservoir is low.
Lift arm pivots are binding.
Lift cylinder is damaged.
Relief valve in lift/lower control valve is stuck.
Pilot valve in lift/lower manifold is damaged or sticking.
Proportional flow divider in gear pump is faulty.
Gear pump section for lift/lower control valve is inefficient.
Lift circuit lines or fittings are leaking.
Lift cylinder is damaged.
Detents in lift/lower control valve are worn.
Rev. E
Page 4 - - 21 Hydraulic System