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Groundsmaster 4100--D/4110--DHydraulic System Page 4 -- 34
Lift Circuit Problems
Problem Possible Cause
Cutting deck (or wing decks) will not
raise.
NOTE: The seat must be occupied
in order to raise cutting deck.
Engine RPM is too low.
Hydraulic oil level in reservoir is low (NOTE: Other h ydraulic systems
are affected as well).
Solenoid valve (S1) in combination manifold is faulty.
Electrical problem exists (see Chapter 5 -- Electrical System).
Lift arm pivots are binding.
Relief valve in combination manifold is stuck.
Lift cylinder(s) is (are) damaged.
Gear pump section for lift/lower circuit is worn or damaged (NOTE: A
worn or damaged g ear pump section will also affect the steering, en-
gine cooling fan motor and traction charge circuits).
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.
Lift circuit hydraulic lines or fittings are leaking.
Cartridge valve(s) in combination manifold has damaged seals or is
faulty.
Lift cylinder for affected deck section is damaged.
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.
Lift arm pivots are binding.
Electrical problem exists (see Chapter 5 -- Electrical System).
Solenoid valve (S1) in combination manifold is faulty.
Counterbalance pressure is excessive.
Lift cylinder for affected deck section is damaged.