Toro Groundsmaster 4100-D Service Manual page 71

Lift Circuit Problems
Problem
Cutting deck (or wing decks) will not
raise.
NOTE: The seat must be occupied
in order to raise cutting deck.
Cutting deck (or wing decks) raise,
but will not stay up.
NOTE: Lift cylinders cannot provide
an absolutely perfect seal. The cut-
ting deck will eventually lower if left
in the raised position during storage.
Cutting deck (or wing decks) will not
lower.
NOTE: To lower cutting deck (or
wing deck), the seat must be occu-
pied and the traction speed must be
in the Low (4WD) position.
Groundsmaster 4100--D/4110--D
Possible Cause
Engine RPM is too low.
Hydraulic oil level in reservoir is low.
Solenoid valve (S1) in lift/lower manifold is faulty.
Electrical problem exists (see Chapter 5 -- Electrical System).
Lift arm pivots are binding.
Relief valve in lift/lower manifold is stuck.
Lift cylinder(s) is (are) damaged.
Gear pump section for lift/lower circuit is inefficient (NOTE: steering
and traction charge circuits impacted as well).
Lift circuit lines or fittings are leaking.
Lift cylinder is damaged.
Cartridge valve(s) in lift/lower manifold has damaged seals or is
faulty.
Lift arm pivots are binding.
Electrical problem exists (see Chapter 5 -- Electrical System).
Solenoid valve (S1) in lift/lower manifold is faulty.
Counterbalance pressure is excessive.
Lift cylinder is damaged.
Page 4 - - 33 Hydraulic System